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1. A two dimensional fluid model for TCP/AQM analysis

Author

Alaoui, Sadek Belamfedel, Rojas, Alejandro J., Hmamed, Abdelaziz, and Tissir, El Houssaine

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

This work proposes a new mathematical model for the TCP/AQM system that aims to improve the accuracy of existing fluid models, especially with respect to the sequential events that occur in the network. The analysis is based on the consideration of two time bases, one at the queue's router level and the other at the congestion window level, which leads to the derivation of a new nonlinear two-dimensional fluid model for Internet congestion control. To avoid the difficult task of assessing stability of a 2D nonlinear dynamic model, we perform a local stability analysis of a 2D linear TCP AQM model. By constructing a new two dimensional second order Bessel Legendre Lyapunov functional, new matrix inequalities are derived to evaluate the stability of the 0-input system and to synthesize a feedback controller. Finally, two Internet traffic scenarios, with state space matrices for replicability, are presented, demonstrating the validity of the theoretical results., Comment: Active queue management, network assisted congestion control, TCP/AQM, 2D time delay systems, Roesser model, 2D second order bessel Legendre, Lyapunov

Published
2022

2. CLOVER Robot: A Minimally Actuated Jumping Robotic Platform for Space Exploration

Author

Macario-Rojas, Alejandro, Parslew, Ben, Weightman, Andrew, and Smith, Katharine L.

Subjects
Computer Science - Robotics, Physics - Applied Physics
Abstract

Robots have been critical instruments to space exploration by providing access to environments beyond human limitations. Jumping robot concepts are attractive solutions to negotiate complex terrain. However, among the engineering challenges to overcome to enable jumping robot concepts for sustained operation, reduction of mechanical failure modes is one of the most fundamental. This study set out to develop a jumping robot with focus on minimal actuation for reduced mechanism maintenance. We present the synthesis of a Sarrus-style linkage to constraint the system to a single translational degree of freedom without the use of typical synchronising gears. We delimit the present research to vertical solid jumps to assess the performance of the fundamental main-drive linkage. A laboratory demonstrator assists the transfer of theoretical concepts and approaches. The laboratory demonstrator performs jumps with 63% potential-to-kinetic energy conversion efficiency, with a theoretical maximum of 73%. Satisfactory operation opens up design optimisation and directional jump capability towards the development of a jumping robotic platform for space exploration.

Published
2022

4. Minimum optical depth multi-port interferometers for approximating any unitary transformation and any pure state

Author

Pereira, Luciano, Rojas, Alejandro, Cañas, Gustavo, Lima, Gustavo, Delgado, Aldo, and Cabello, Adán

Subjects
Quantum Physics
Abstract

Reconfigurable devices capable to implement any unitary operation with a given fidelity are crucial for photonic universal quantum computation, optical neural networks, and boson sampling. Here, we address the problems of approximating with a given infidelity any unitary operation and any pure state using multi-port interferometers, which are of current interest due to the recent availability of multi-core fiber integrated multi-port interferometers. We show that any pure state, in any dimension $d$, can be prepared with infidelity $\le 10^{-15}$ with $3$~layers of $d$-dimensional Fourier transforms and $3$~layers of configurable phase shifters. In contrast, the schemes in [Phys. Rev. Lett. \textbf{73}, 58 (1994) and Optica \textbf{3}, 1460 (2016)], require optical depth $2(d-1)$. We also present numerical evidence that $d+1$~layers of $d$-dimensional Fourier transforms and $d+2$~layers of configurable phase shifters can produce any unitary with infidelity $\le 10^{-14}$, while the scheme in [Phys. Rev. Lett. \textbf{124}, 010501 (2020)] only achieves an infidelity in the order of $10^{-7}$ for block-diagonal unitary transformations

Published
2020

8. Solar activity simulation and forecast with a flux-transport dynamo

Author

Macario-Rojas, Alejandro, Smith, Katharine L., and Roberts, Peter C. E.

Subjects
Astrophysics - Solar and Stellar Astrophysics
Abstract

We present the assessment of a diffusion-dominated mean field axisymmetric dynamo model in reproducing historical solar activity and forecast for solar cycle 25. Previous studies point to the Sun's polar magnetic field as an important proxy for solar activity prediction. Extended research using this proxy has been impeded by reduced observational data record only available from 1976. However, there is a recognised need for a solar dynamo model with ample verification over various activity scenarios to improve theoretical standards. The present study aims to explore the use of helioseismology data and reconstructed solar polar magnetic field, to foster the development of robust solar activity forecasts. The research is based on observationally inferred differential rotation morphology, as well as observed and reconstructed polar field using artificial neural network methods via the hemispheric sunspot areas record. Results show consistent reproduction of historical solar activity trends with enhanced results by introducing a precursor rise time coefficient. A weak solar cycle 25, with slow rise time and maximum activity $-14.4 \%$ ($\pm 19.5\%$) with respect to the current cycle 24 is predicted., Comment: 13 pages, 15 figures. Accepted by MNRAS 18 June 2018

Published
2018
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9. A prospective analysis of symptom burden for patients with chronic myeloid leukemia in chronic phase treated with frontline second‐ and third‐generation tyrosine kinase inhibitors

Author

Zulbaran‐Rojas, Alejandro, Lin, Huei‐Kan, Shi, Qiuling, Williams, Loretta A, George, Binsah, Garcia‐Manero, Guillermo, Jabbour, Elias, O’Brien, Susan, Ravandi, Farhad, Wierda, William, Estrov, Zeev, Borthakur, Gautam, Kadia, Tapan, Cleeland, Charles, Cortes, Jorge E, and Kantarjian, Hagop

Subjects
Biomedical and Clinical Sciences, Clinical Sciences, Hematology, Rare Diseases, Clinical Research, Clinical Trials and Supportive Activities, Cancer, Evaluation of treatments and therapeutic interventions, 6.1 Pharmaceuticals, Adolescent, Adult, Aged, Aged, 80 and over, Antineoplastic Agents, Dasatinib, Female, Humans, Imidazoles, Leukemia, Myeloid, Chronic-Phase, Male, Middle Aged, Protein Kinase Inhibitors, Pyridazines, Pyrimidines, Quality of Life, Symptom Assessment, Young Adult, BCR-ABL, chronic myeloid leukemia, symptom burden, tyrosine kinase inhibitors, Biochemistry and Cell Biology, Oncology and Carcinogenesis, Oncology and carcinogenesis
Abstract

BackgroundTreatment with tyrosine kinase inhibitors (TKIs) for patients with chronic myeloid leukemia (CML) is effective but needs to continue for several years, possibly indefinitely. Although generally safe, TKI may have hitherto poorly recognized effects in the quality of life (QoL) of such patients.MethodsWe prospectively measured the symptom burden of patients with chronic phase CML enrolled on frontline TKI trials with dasatinib, nilotinib, or ponatinib. A total of 219 patients were enrolled and filled out the MD Anderson Symptom Inventory (MDASI)-CML questionnaire before the start of therapy and during follow-up at defined time points of 3, 6, 9, 12, 18, and 24 months.ResultsThe median age was 50 years. Longitudinal analysis showed relatively stable symptom severity scores over time. Fatigue was the most common symptom in all three cohorts, both prior to the start of therapy and during therapy, including after achievement of deep molecular remission. Work was the most affected component of daily living. Overall patients tolerated therapy well with improvement of their symptoms from baseline, with few dose reductions related to toxicity or symptomatology. Although 31% of the patients who completed MDASI-CML achieved complete molecular remission by 24 months of treatment, nearly 90% experienced persistent mild symptoms.ConclusionSide effects related to TKIs may impact the quality of life in patients with CML-CP. Further studies should investigate factors (comorbidities, concomitant medications, dose and schedule, etc) associated with these symptoms and interventions that may improve the patients' QoL, including treatment discontinuation when safely feasible.

Published
2018

10. Design considerations for LEO nanosatellite propulsion technologies

Author

Macario Rojas, Alejandro and Smith, Katharine

Subjects
620, Nanosatellite, Propulsion, Atmospheric interaction, Solar activity, Manoeuvre, Thrust characterisation, Low Earth Orbit
Abstract

In recent years the space industry has seen significant growth in numbers of sub 10kg satellite platforms now known more broadly in the industry as nanosatellites. Nanosatellites potential applicability is driven by flourishing technologies miniaturisation in the consumer electronics market and commercialisation of space. Currently nanosatellite mission operations are limited in both lifetime and manoeuvrability due to limitations in on board propulsion technologies. Further enhancement of mission operations relies on more effective integration of current reaction-mass-based propulsion technologies and further development of miniaturised propulsion systems. Paradoxically, the compact spacecraft size and mass that facilitate nanosatellite access to space is presently a drawback in terms of acceptable systems performance and propulsion systems capacity. Moreover characteristic power density and vulnerability to the space environment is already high in nanosatellites in contrast to major satellites, rendering the design, inclusion, and optimisation of propulsion technologies a challenging task. This thesis focuses on techniques to support mission planning and characterisation of propulsion technologies for nanosatellites. Acknowledging the outweighing significance of solar activity modulating space environment perturbations and particularly atmospheric drag, a robust solar forecast method is proposed to support lifetime estimations. Complementing the pivotal framework information for propulsion system design and management, the vulnerability to atmospheric drag is assessed to identify the profile of the current vaguely defined drag coefficient of standard nanosatellites. Finally, addressing a crucial task on emerging propulsion technologies for nanosatellite systems, a method to improve low thrust characterisation via in-orbit manoeuvres using standard elementary attitude determination resources is devised. The robust solar activity forecast is carried out using observed historic and reconstructed Sun’s polar magnetic field, to define the initial state of an up-to-date solar magnetohydrodynamics computational model; the method successfully reproduces recent solar cycles activity, anticipating moderate-to-low activity during the next 25th cycle. The identification of the drag coefficient profile in standard nanosatellites is enabled by the statistical assessment of observed orbital decay through an iterative fitting process of propagated orbits; the profile is physically consistent and descriptive mostly in orbits below 350km during moderate-to-high solar activity. Finally, the devised thrust characterisation method exploits the regular geometry and mass distribution of standard nanosatellites to identify low thrust actuation via actuated body angular rotation rates in an intermediate axis spinner; precise computer simulations show that it is possible to improve low thrust estimations from weak and noisy sensor signals using the proposed method against typical methods using body angular acceleration.

Published
2018

11. Voice and poetry as inspiration and material in acousmatic composition

Author

Albornoz Rojas, Alejandro and Stanović, Adam

Subjects
781.3
Abstract

This thesis combines both practice-based research, in the form of acousmatic composition, and theoretical research, addressing voice and poetry both as inspiration and material. It includes a portfolio of original compositions and a written text with aesthetic ideas that informed the compositional process. The aim of the research was to propose a particular creative strategy, based on Chilean poet Vicente Huidobro's aesthetic theory; a system which aims to create artistic works independent of real world by taking materials from reality and combining them in unexpected ways through an equilibrium between rationality and intuition. This theory, alongside various other theoretical and artistic sources informing the creative process, is explained in a section entitled Compositional Rationale. The broader thesis is divided into two parts, each starting with a methodology relating to the compositions described within: Part 1: Octophonic cycle La lumière artificielle and Part 2: Three acousmatic tributes. In order to examine how the Compositional Rationale operates within the portfolio's pieces, an analytical methodology has been proposed. This is described in an Analytical methodology section and considers the use of two parts of the tripartite model proposed by Nattiez (1990) and developed for electroacoustic music by Roy (2004). The two parts of the tripartite model are poietic analysis and neutral analysis. The first describes the creative process and compositional considerations of the author, and the second details the constitutive elements of each piece within five areas; Pierre Schaeffer's notion of sound objects (1966), Denis Smalley's notion of spectromorphological functions (1997), levels of spatial function by Annette Vande Gorne (2010), and finally two more types of analyses developed by the author: voice type and speech-sound type. Taken as a whole, the analysis demonstrates the structural constitution of each piece, and thus shows how Huidobro's creative system, called creacionismo, has been applied successfully to acousmatic composition, generating the notion of acousmatic-creationist as nomenclature for the process. This is the main outcome of this thesis, a new artistic strategy which balances rationality and intuition within acousmatic composition and places poetry as a driven force in the use of voice, merging artistic practice and theory in a recursive action.

Published
2018

13. An Evaluation of Bacterial Wilt (Ralstonia solanacearum) Resistance in a Set of Tomato Germplasm from the United States Department of Agriculture

Author

Phiri, Theresa Makawa, primary, Bhattarai, Gehendra, additional, Chiwina, Kenani Edward, additional, Fan, Qiurong, additional, Xiong, Haizheng, additional, Alatawi, Ibtisam, additional, Dickson, Ryan, additional, Joshi, Neelendra K., additional, Rojas, Alejandro, additional, Ling, Kai-Shu, additional, and Shi, Ainong, additional

Published
2024
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18. Reflection on 10 Years of Community-Engaged Scholarship in the Faculty of Land and Food Systems at the University of British Columbia-Vancouver

Author

Rojas, Alejandro, Sipos, Yona, and Valley, Will

Abstract

In this article, the authors describe a cultural transformation to embrace community-engaged scholarship by faculty members in the Faculty of Land and Food Systems at the University of British Columbia-Vancouver. They describe a transition from community-inquiry faculty projects to community-engaged action research projects achieved through organizational restructuring, curricular revision, and new teaching approaches; discuss the concepts that grounded their curricular revision; and report on the outcomes of their Faculty's transition. (Contains 1 table and 1 figure.)

Published
2012

21. The Lambda Variant in Argentina: Analyzing the Evolution and Spread of SARS-CoV-2 Lineage C.37

Author

Nabaes Jodar, Mercedes Soledad, primary, Torres, Carolina, additional, Mojsiejczuk, Laura, additional, Acuña, Dolores, additional, Valinotto, Laura Elena, additional, Goya, Stephanie, additional, Natale, Monica, additional, Lusso, Silvina, additional, Alexay, Sofia, additional, Amadio, Ariel, additional, Irazoqui, Matias, additional, Fernandez, Franco, additional, Acevedo, Maria Elina, additional, Alvarez Lopez, Cristina, additional, Angelletti, Andres, additional, Aulicino, Paula, additional, Bolatti, Elisa, additional, Brusés, Bettina, additional, Cacciahue, Marco, additional, Cavatorta, Ana, additional, Cerri, Agustina, additional, Cordero, Andres, additional, Debat, Humberto, additional, Dus Santos, Maria Jose, additional, Eberhardt, Maria Florencia, additional, Ercole, Regina, additional, Espul, Carlos, additional, Farber, Marisa, additional, Fay, Fabián, additional, Fernandez, Ailen, additional, Ferrini, Florencia, additional, Formichelli, Laura, additional, Ceballos, Santiago, additional, Gallego, Fernando, additional, Giri, Adriana, additional, Gismondi, Maria, additional, Acevedo, Raul Maximiliano, additional, Gramundi, Ivan, additional, Ibañez, María Eugenia, additional, Konig, Guido, additional, Leiva, Viviana, additional, Lorenzini Campos, Melina, additional, Lucero, Horacio, additional, Marquez, Nathalie, additional, Mazzeo, Melina, additional, Mistchenko, Alicia Susana, additional, Montoto, Luciana, additional, Muñoz, Marianne, additional, Nadalich, Victoria, additional, Nardi, Cristina, additional, Ortiz, Belén, additional, Pianciola, Luis, additional, Pintos, Carolina, additional, Puebla, Andrea, additional, Rastellini, Carolina, additional, Rojas, Alejandro Ezequiel, additional, Sfalcin, Javier, additional, Suarez, Ariel, additional, Theaux, Clara, additional, Thomas, Guillermo, additional, Tittarelli, Estefania, additional, Toro, Rosana, additional, Villanova, Vanina, additional, Wenk, Gretel, additional, Ziehm, Cecilia, additional, Zimmermann, Maria Carla, additional, Zunino, Sebastian, additional, PAIS, Proyecto, additional, and Viegas, Mariana, additional

Published
2023
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22. Food + Schools

Author

ROJAS, ALEJANDRO, KEMSHAW, MATHEW, MANSFIELD, BRENT, and ORREGO, ELENA

Published
2018

27. Definició del model de xarxa assistencial territorial i de la cartera de serveis: anàlisi i propostes de futur

Author

Casanovas-Guitart, Cristina, Guarga-Rojas, Alejandro, Pozuelo, Alfonso, Reynolds, Jillian, [Casanovas-Guitart C, Reynolds J] Divisió de Projectes i Qualitat Assistencial, Àrea Assistencial, Servei Català de la Salut (CatSalut), Departament de Salut, Generalitat de Catalunya, Barcelona, Spain. [Guarga Rojas A, Pozuelo A] Gerència de Planificació Operativa i Avaluació (GPOA), Àrea Assistencial, Servei Català de la Salut (CatSalut), Departament de Salut, Generalitat de Catalunya, Barcelona, Spain, and Departament de Salut

Subjects
Salut pública - Planificació - Catalunya, Políticas, Planificación y Administración en salud::administración en salud::administración de los servicios de salud [SALUD PÚBLICA], Serveis sanitaris - Catalunya, Health Care (Public Health)::Health Services::Basic Health Services [PUBLIC HEALTH], Catalonia, Cataluña, atención a la salud (salud pública)::servicios de salud::servicios básicos de salud [SALUD PÚBLICA], Health Policy, Planning and Management::Health Administration::Health Services Administration [PUBLIC HEALTH]
Abstract

Xarxa territorial; Cartera de serveis; Prestacions Red territorial; Cartera de servicios; Prestaciones Territorial network; Portfolio of services; Benefits El CatSalut, amb el suport de Antares Consulting, ha realitzat recentment un estudi per avançar cap a una planificació basada en xarxes i cartera de serveis per territoris (i no tant per nivells hospitalaris). Per donar continuïtat s’ha avançat en dues línies que tenen per objecte: 1. Definir els instruments i les eines per a la gestió de xarxes territorials 2. Definició dels criteris d’ordenació de la cartera de serveis en una xarxa hospitalària El primer punt ha de permetre definir els elements estructurals de les futures xarxes territorials: − L’estructura jurídica de la xarxa, amb característiques supraorganitzatives que respectin la naturalesa de les organitzacions que la integren. − El model de govern de la xarxa. − Les condicions de mobilitat dels professionals dins la xarxa. El segon punt ha de permetre definir el model de cartera de serveis: − Establir els criteris d’ordenació de les prestacions assistencials a nivell d’hospital, de xarxa i de supraxarxa. − Definir la cartera de serveis dels hospitals comarcals. − Caracteritzar el model de funcionament entre la xarxa hospitalària (territorial i horitzontal) amb els altres nivells assistencials (local i de coordinació vertical).:ca_ES El CatSalut, con el apoyo de Antares Consulting, ha realizado recientemente un estudio para avanzar hacia una planificación basada en redes y cartera de servicios por territorios (y no tanto por niveles hospitalarios). Para dar continuidad se ha avanzado en dos líneas que tienen por objeto: 1. Definir los instrumentos y herramientas para la gestión de redes territoriales 2. Definición de los criterios de ordenación de la cartera de servicios en una red hospitalaria El primer punto debe permitir definir los elementos estructurales de las futuras redes territoriales: − La estructura jurídica de la red, con características supraorganizativas que respeten la naturaleza de las organizaciones que la integran. − El modelo de gobierno de la red. − Las condiciones de movilidad de los profesionales dentro de la red. El segundo punto debe permitir definir el modelo de cartera de servicios: - Establecer los criterios de ordenación de las prestaciones asistenciales a nivel de hospital, red y suprared. − Definir la cartera de servicios de los hospitales comarcales. − Caracterizar el modelo de funcionamiento entre la red hospitalaria (territorial y horizontal) con los otros niveles asistenciales (local y de coordinación vertical). CatSalut, with the support of Antares Consulting, has recently carried out a study to move towards planning based on networks and portfolio of services by territory (and not so much by hospital level). In order to provide continuity, progress has been made in two lines whose purpose is: 1. Define the instruments and tools for the management of territorial networks 2. Definition of the criteria for organizing the portfolio of services in a hospital network The first point it must allow the structural elements of future territorial networks to be defined: − The legal structure of the network, with supra-organizational characteristics that respect the nature of the organizations that make it up. - The governance model of the network. - The mobility conditions of professionals within the network. The second point must make it possible to define the model of the portfolio of services: − Establish the criteria for ordering healthcare services at hospital, network and super-network level. - Define the service portfolio of regional hospitals. − Characterize the operating model between the hospital network (territorial and horizontal) with the other care levels (local and vertical coordination).

Published
2023

28. Directrius per al disseny de centres d'atenció primària i comunitària de futur

Author

Aloy Punzano, Joan, Boada Valmaseda, Albert, Casanovas-Guitart, Cristina, Díaz, Estela, Gimeno, Beatriu, Guarga-Rojas, Alejandro, Sospedra, Jordi, and Departament de Salut

Subjects
Catalonia, tecnología, industria y agricultura::arquitectura::diseño y construcción de instalaciones [TECNOLOGÍA, INDUSTRIA Y AGRICULTURA], Cataluña, Centres d'atenció primària - Catalunya - Disseny i construcció, Technology, Industry, and Agriculture::Architecture::Facility Design and Construction [TECHNOLOGY, INDUSTRY, AND AGRICULTURE], Health Services Administration::Patient Care Management::Comprehensive Health Care::Primary Health Care [HEALTH CARE], administración de los servicios de salud::gestión de la atención al paciente::atención integral de salud::atención primaria de la salud [ATENCIÓN DE SALUD]
Abstract

Infraestructures; Atenció Primària; Disseny; Tecnologia Infraestructuras; Atención Primaria; Diseño; Tecnología Infrastructures; Primary Care; Design; Technology En els darrers anys i després de la pandèmia causada per la COVID-19, s’han accentuat noves i nombroses necessitats sanitàries de la població, i en concret a l’atenció primària i comunitària (APiC), la qual cal dotar adequadament de recursos humans i econòmics per a la provisió de l’atenció. Una d’aquestes necessitats és la urgència de remodelar el disseny de les infraestructures i espais dels centres d’atenció primària (CAP), els quals actualment presenten diferents graus d’obsolescència. Davant d’aquesta situació, s’ha treballat en l’actualització de les directrius per al disseny dels CAP del futur, amb l’objectiu de respondre a totes les necessitats actuals i futures de la població. Per fer-ho, s’ha dut a terme una investigació seguint un mètode qualitatiu basat en la revisió bibliogràfica de documents de referència i la realització de sessions de cocreació amb diferents professionals i usuaris dels CAP. En los últimos años y después de la pandemia causada por la COVID-19, se han acentuado nuevas y numerosas necesidades sanitarias de la población, y en concreto en la atención primaria y comunitaria (APiC), la cual es necesario dotar adecuadamente de recursos humanos y económicos para la provisión de la atención. Una de estas necesidades es la urgencia de remodelar el diseño de las infraestructuras y espacios de los centros de atención primaria (CAP), que actualmente presentan diferentes grados de obsolescencia. Ante esta situación, se ha trabajado en la actualización de las directrices para el diseño de los CAP del futuro, con el objetivo de responder a todas las necesidades actuales y futuras de la población. Para ello, se ha llevado a cabo una investigación siguiendo un método cualitativo basado en la revisión bibliográfica de documentos de referencia y la realización de sesiones de cocreación con diferentes profesionales y usuarios de los CAP. In recent years and after the pandemic caused by COVID-19, new and numerous health needs of the population have been accentuated, and specifically in primary and community care (APiC), which must be adequately resourced human and economic for the provision of care. One of these needs is the urgency to remodel the design of the infrastructures and spaces of the primary care centers (CAP), which currently show varying degrees of obsolescence. Faced with this situation, work has been done on updating the guidelines for the design of the CAPs of the future, with the aim of responding to all the current and future needs of the population. To do this, research has been carried out following a qualitative method based on the bibliographic review of reference documents and the realization of co-creation sessions with different professionals and users of the CAP.

Published
2023

31. Electrical stimulation to regain lower extremity muscle perfusion and endurance in patients with post‐acute sequelae of SARS CoV ‐2: A randomized controlled trial

Author

Zulbaran‐Rojas, Alejandro, primary, Lee, Myeounggon, additional, Bara, Rasha O., additional, Flores‐Camargo, Areli, additional, Spitz, Gil, additional, Finco, M. G., additional, Bagheri, Amir Behzad, additional, Modi, Dipaben, additional, Shaib, Fidaa, additional, and Najafi, Bijan, additional

Published
2023
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32. Studying NGO- Rapid Assessment Framework Toolkits for promoting SWM in Kohalpur, Nepal: Whose reality counts?

Author

Martin Rojas, Alejandro and Martin Rojas, Alejandro

Abstract

Waste generation has significantly increased over the past few decades, leading to negative impacts on both humans and the environment. Developing countries struggle to effectively manage waste due to inadequate protection and collection services. To address this issue, international aid has started investing in waste management systems. However, initial efforts focused solely on technical assistance were proven to be ineffective as they lacked a full understanding of the factors affecting waste management. Nowadays, the focus has shifted to understanding what enables SWM interventions and analysing the enabling environment. To improve its waste management efforts, WASTE NL created the SQUAT tool, a rapid assessment framework toolkit to assess the enabling environment and increase the success of SWM interventions by focusing resources The purpose of this study is to examine both informal and formal factors that enable waste management interventions in Kohalpur, Nepal, which are the actors involved in this scenario and assess their representation in the SQUAT tool. The study is based on the Integrated Sustainable Waste Management theory, which identifies six enabling components. This research focuses on the institutional, policy, and socio-cultural aspects of these components. This study results reveal that in formal practices, a major factor enabling SWM interventions in Kohalpur, Nepal is the presence of an institutional body responsible for the SWM system and a national policy framework. In terms of socio-cultural factors, the enabling behaviour is influenced by various factors including the right to receive waste services, the perception of waste workers, and the social perception of generated waste. Most of the formal factors mentioned are captured by the tool, capturing partially the Kohalpur’s enabling environment. However, the informal practices were not considered by the tool. In Kohalpur, the citizens, due to a lack of waste collection services, must person

Published
2023

34. Actualització de la cartera de serveis i dels criteris de planificació per a l’atenció als nounats: recomanacions generals i detall per als nounats complexos

Author

Pozuelo, Alfonso, Casanovas-Guitart, Cristina, Guarga-Rojas, Alejandro, Araujo, Paloma, Castillo Salinas, Félix, Domingo-Puiggròs, Mònica, Iriondo, Martin, Foguet, Anton, Garriga, Montserrat, Larrosa, Susana, Llobet Agulló, MªPilar, Maya-Enero, Silvia, Perapoch-López, Josep, Solé, Eduardo, Barrubés, Joan, Garcia, Miquel, Sendra, Arnau, Pons-Vigués, Mariona, [Pozuelo A, Pons-Vigués M, Casanovas-Guitart C, Guarga-Rojas A] Gerència de Planificació (GPOA), Àrea Assistèncial, Servei Català de la Salut (CatSalut), Departament de Salut, Generalitat de Catalunya, Barcelona, Spain. [Araujo P] Servei Neonatologia, Consorci Sanitari de Terrassa, Barcelona, Spain. [Castillo Salinas F] Servei de Neonatologia, Hospital Vall d’Hebron, Barcelona, Spain. [Domingo-Puiggròs M] Unitat de Neonatologia i UCI Neonatal, Hospital Universitari Parc Taulí, Sabadell, Spain [Irondo M] Unitat de Neonatologia, Hospital Sant Joan de Déu, Barcelona, Spain. [Foguet A] Equip Pediàtric Territorial de la Garrotxa, Fundació Hospital d’Olot i Comarcal de la Garrotxa, Olot, Spain. [Garriga M] Hospital Fundació Althaia, Manresa, Spain. [Larrosa S] Unitat de Neonatologia, Hospital Universitari Salut Sant Joan Reus-Baix Camp, Reus, Spain. [Llobet-Agulló P] Servei de Pediatria, Hospital de Granollers, Granollers, Spain. [Maya-Enero S] Servei Neonatologia, Parc de Salut Mar, Barcelona, Spain. [Perapoch-López J] Servei de Pediatria, Hospital Universitari Dr. Josep Trueta de Girona, Girona, Spain. [Solé E] Gerència Territorial Institut Català de la Salut (ICS) Lleida, Spain. [Barrubés J, Garcia M, Sendra A] Antares Consulting, Barcelona, Spain, and Departament de Salut

Subjects
Health Care Economics and Organizations::Health Planning [HEALTH CARE], Catalonia, Serveis sanitaris - Catalunya - Planificació, Cataluña, Infants nadons - Assistència hospitalària, Health Care Facilities, Manpower, and Services::Health Services [HEALTH CARE], instalaciones, servicios y personal de asistencia sanitaria::servicios de salud [ATENCIÓN DE SALUD], personas::Grupos de Edad::lactante::recién nacido [DENOMINACIONES DE GRUPOS], Persons::Age Groups::Infant::Infant, Newborn [NAMED GROUPS], economía y organizaciones para la atención de la salud::planificación en salud [ATENCIÓN DE SALUD]
Abstract

Nounats; Planificació; Cartera de serveis; Centres hospitalaris; SISCAT Recién nacidos; Planificación; Cartera de servicios; Centros hospitalarios; SISCAT Newborns; Planning; Portfolio of services; Hospital centers; SISCAT El CatSalut proposa com a objectiu principal actualitzar els criteris operatius de planificació i cartera de serveis establerts en relació amb l’atenció dels nounats als centres hospitalaris del SISCAT de Catalunya prenent com a referència principal el Pla estratègic d'ordenació de l’atenció maternoinfantil de l’any 2008. Per tal d’aconseguir aquest propòsit, es defineixen els objectius específics següents: Actualitzar els nivells d’atenció neonatal i la prestació de serveis associada a cada nivell. Actualitzar els indicadors i criteris d’activitat associat a cada nivell. Valorar els criteris d’organització i recursos en relació amb les cures intensives i intermèdies.

Published
2023

35. Food + Schools: The results from a UBC-led four-year experiment in sustainability and experiential learning indicates that the sum of the parts is much greater than the whole

Author

Rojas, Alejandro, Kemshaw, Mathew, Mansfield, Brent, and Orrego, Elena

Subjects
Food supply -- Environmental aspects, Sustainable development -- Conferences, meetings and seminars, School food services -- Environmental aspects -- Conferences, meetings and seminars, Experiential learning -- Conferences, meetings and seminars, Environmental issues, Social sciences
Abstract

EACH YEAR ROUGHLY two billion people are overfed and two billion are underfed by a global food system that is making measurable impacts upon our planet's atmospheric and oceanic chemistry. [...]

Published
2018

37. Endometriosis of the cecum in a postmenopausal women: Case report and literature review

Author

Torres-Rincón, Ricardo Andrés, Moreno-Rojas, Alejandro, and Salinas-Parra, Carolina

Subjects
Colorectal Neoplasm, Endometriosis, Intestines, Obstruction Bowel, Medicine, Medicine (General), R5-920
Abstract

Endometriosis is a benign disease defined as the extra-uterine implantation and proliferation of tissue similar to endometrium (glands and stroma), causing a chronic inflammatory response and adhesions that distort anatomy. The extra-gonadal involvement is rare, but reports of intestinal endometriosis have increased substantially, mainly affecting the sigmoid colon and rectum; isolated involvement of the cecum is rare, even more so in a postmenopausal woman without use of hormone replacement therapy. We report the case of a postmenopausal woman with intestinal obstruction surgically suggestive of malignancy; however, pathological examination revealed endometriosis.

Published
2017
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40. Variation in Isolate Virulence and Accession Resistance Associated with Diaporthe aspalathi, D. caulivora, and D. longicolla in Soybean

Author

Mohan, Karthika, primary, Kontz, Brian, additional, Okello, Paul, additional, Allen, Tom W., additional, Bergstrom, Gary C., additional, Bissonnette, Kaitlyn, additional, Bonkowski, John, additional, Bradley, Carl A., additional, Buck, James, additional, Chilvers, Martin I., additional, Dorrance, Anne, additional, Giesler, Loren, additional, Kelly, Heather, additional, Koehler, Alyssa, additional, Lopez-Nicora, Horacio D., additional, Mangel, Dylan, additional, Markell, Samuel G., additional, Mueller, Daren, additional, Price III, Paul P., additional, Rojas, Alejandro, additional, Shires, Madalyn, additional, Smith, Damon, additional, Spurlock, Terry, additional, Webster, Richard W., additional, Wise, Kiersten, additional, Yabwalo, Dalitso, additional, and Mathew, Febina M., additional

Published
2023
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42. Safety and efficacy of electrical stimulation for lower-extremity muscle weakness in intensive care unit 2019 Novel Coronavirus patients: A phase I double-blinded randomized controlled trial

Author

Zulbaran-Rojas, Alejandro, primary, Mishra, Ramkinker, additional, Rodriguez, Naima, additional, Bara, Rasha O., additional, Lee, Myeounggon, additional, Bagheri, Amir Behzad, additional, Herlihy, James P., additional, Siddique, Muhammad, additional, and Najafi, Bijan, additional

Published
2022
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43. Unitats del dolor al SISCAT: cartera de serveis i nivells de complexitat

Author

Perelló Bratescu, Aina, Manresa, Anna, Montes, Antonio, Dürsteler, Christian, Català-Puigbó, Elena, Matute, Mercè, Salvador-Vilalta, Xavier, Vilardell, Lluis, Boada, Albert, Casanovas-Guitart, Cristina, Colàs-Campàs, Laura, Guarga-Rojas, Alejandro, Ponsà, Antoni, Pozuelo, Alfonso, Surís, Xavier, Torné-Vilagrasa, Elvira, [Perelló A] Societat Catalana de Medicina Familiar i Comunitària (CAMFiC), CAP Larrard, Institut Català de la Salut, Barcelona, Spain. [Manresa A] Societat Catalana de Medicina Familiar i Comunitària (CAMFiC), CAP Nou Tarraco, Institut Català de la Salut, Tarragona, Spain. [Montes A] Societat Catalana del Dolor, Hospital del Mar, Barcelona, Spain. [Dürsteler C] Hospital Clínic, Universitat de Barcelona, Barcelona, Spain. [Català E] Hospital de la Santa Creu i Sant Pau, Barcelona, Spain. [Matute M] PADEICS, Hospital Universitari Arnau de Vilanova de Lleida, Institut Català de la Salut, Lleida, Spain. [Salvador X, Vilardell Ll] Àrea de Sistemes d’Informació, Servei Català de la Salut (CatSalut), Departament de Salut, Generalitat de Catalunya, Barcelona, Spain. [Boada A, Casanovas-Guitart C, Colàs-Campàs L, Guarga A, Ponsà A, Pozuelo A, Suris X, Torné E] Àrea Assistencial, Servei Català de la Salut (CatSalut), Departament de Salut, Generalitat de Catalunya, Barcelona, Spain, and Departament de Salut

Subjects
Dolor crònic - Serveis sanitaris, Health Care Facilities, Manpower, and Services::Health Services [HEALTH CARE], afecciones patológicas, signos y síntomas::signos y síntomas::manifestaciones neurológicas::dolor::dolor crónico [ENFERMEDADES], instalaciones, servicios y personal de asistencia sanitaria::servicios de salud [ATENCIÓN DE SALUD], Pathological Conditions, Signs and Symptoms::Signs and Symptoms::Neurologic Manifestations::Pain::Chronic Pain [DISEASES]
Abstract

Unitats del dolor; Hospitals; Cartera de serveis; SISCAT Unidades del dolor; Hospitales; Cartera de servicios; SISCAT Pain units; Hospitals; Portfolio of services; SISCAT Les unitats del dolor són unitats de tipus funcional pròpies de l’àmbit hospitalari, on diferents professionals d’un mateix centre sanitari treballen conjuntament per a l’abordatge del pacient amb dolor. Aquestes presten l’atenció en l’àmbit hospitalari i, dins d’aquest, majoritàriament, en l’entorn de les consultes externes hospitalàries o de l’hospital de dia o àrees de tècniques especials. A més, els procediments més complexos s’han de realitzar en entorns de tipus quiròfan. Així, es fa palesa la necessitat de disposar d’una major concreció en la cartera de serveis de les unitats del dolor i recomanacions per al maneig del dolor a Catalunya, garantint en tot moment la qualitat i seguretat d’aquesta prestació, amb l’objectiu de millorar la qualitat de vida de les persones que pateixen dolor i garantir l’equitat d’accés per a la població, tot ordenant els fluxos quan sigui necessari. Per assolir aquests objectius, cal establir una codificació correcta de les diferents tècniques i/o procediments

Published
2023

44. Protocol d’accés al lector ocular o altres sistemes de comunicació augmentativa: cartera de serveis del SISCAT

Author

Casanovas-Guitart, Cristina, Guarga-Rojas, Alejandro, Magem, David, Pons-Vigués, Mariona, Vallès-Forcada, Elisabet, [Casanovas-Guitart C, Guarga Rojas À, Magem Luque D, Pons Vigués M] Gerència de Planificació Operativa i Avaluació, Àrea Assistencial, Servei Català de la Salut, Generalitat de Catalunya, Spain. [Vallès Forcada E] Registre CMBD de Recursos Sociosanitaris i d’Atenció Especialitzada Ambulatòria, Divisió d’Anàlisi de la Demanda, Àrea de Sistemes d’Informació, Servei Català de la Salut, Generalitat de Catalunya, Spain, and Departament de Salut

Subjects
equipos y suministros::dispositivos de autoayuda::ayudas de comunicación para discapacitados [TÉCNICAS Y EQUIPOS ANALÍTICOS, DIAGNÓSTICOS Y TERAPÉUTICOS], Communication Aids for Disabled, Equipment and Supplies [ANALYTICAL, DIAGNOSTIC AND THERAPEUTIC TECHNIQUES, AND EQUIPMENT], Catalonia, Cataluña, Discapacitats - Aparells de comunicació, Productes de salut - Catalunya, equipos y suministros [TÉCNICAS Y EQUIPOS ANALÍTICOS, DIAGNÓSTICOS Y TERAPÉUTICOS]
Abstract

Lector ocular; Sistemes de comunicació augmentativa; Cartera serveis; SISCAT Lector ocular; Sistemas de comunicación aumentativa; Cartera servicios; SISCAT Eye reader; Augmentative communication systems; Services portfolio; SISCAT Amb l’objectiu de facilitar a les persones amb determinades característiques i capacitats un sistema de comunicació que els permeti comunicar-se amb l’entorn, durant el 2017 la Comissió de Prestacions, Assegurament i Finançament (CPAF), dependent del Consell Interterritorial del Ministeri de Sanitat i Consum, va impulsar un grup de treball amb professionals experts per elaborar una proposta d’indicació i el procediment de reutilització de sistemes de comunicació considerats productes sanitaris. Posteriorment, l’Ordre SCB/480/2019, de 26 de abril, per la qual es modifiquen els annexos I, II, III i VI del Reial decret 1030/2006, de 15 de setembre, pel qual s’estableix la cartera de serveis comuns del Sistema Nacional de Salut i el seu procediment d’actualització, va incloure la modificació següent a l’apartat 1.4 de l’annex III, sobre els sistemes de comunicació alternativa com a part dels productes sanitaris.

Published
2023

45. Omicron Waves in Argentina: Dynamics of SARS-CoV-2 Lineages BA.1, BA.2 and the Emerging BA.2.12.1 and BA.4/BA.5

Author

Torres, Carolina, Jodar, Mercedes Nabaes, Acuña, Dolores, Montaño, Romina Micaela Zambrana, Culasso, Andrés Carlos Alberto, Amadio, Ariel Fernando, Aulicino, Paula, Ceballos, Santiago, Cacciabue, Marco, Debat, Humberto, Santos, María José Dus, Eberhardt, María Florencia, Espul, Carlos, Fay, Fabián, Fernández, María Ailén, Fernández, Franco, Muñoz, Juan Manuel Fernandez, Ferrini, Florencia, Gallego, Fernando, Giri, Adriana Angélica, Cerri, Agustina, Bolatti, Elisa, Gismondi, María Ines, Goya, Stephanie, Gramundi, Iván, Irazoqui, José Matías, König, Guido Alberto, Leiva, Viviana, Lucero, Horacio, Marquez, Nathalie, Nardi, Cristina, Ortiz, Belén, Pianciola, Luis, Pintos, Carolina Beatriz, Puebla, Andrea Fabiana, Rastellini, Carolina Victoria, Rojas, Alejandro Ezequiel, Sfalcin, Javier, Suárez, Ariel, Tittarelli, Estefanía, Toro, Rosana, Villanova, Gabriela Vanina, Ziehm, María Cecilia, Zimmermann, María Carla, Zunino, Sebastián, Group, Proyecto PAIS Working Group Proyecto PAIS Working, Valinotto, Laura, and Viegas, Mariana

Subjects
variants, Evolution, SARS-CoV-2, Omicron, Biología, Variants, dynamics, South America, Dynamics, Infectious Diseases, Virology, Ciencias Médicas, evolution, BA.1, BA.2, BA.4, BA.5
Abstract

The COVID-19 pandemic has lately been driven by Omicron. This work aimed to study the dynamics of SARS-CoV-2 Omicron lineages during the third and fourth waves of COVID-19 in Argentina. Molecular surveillance was performed on 3431 samples from Argentina, between EW44/2021 and EW31/2022. Sequencing, phylogenetic and phylodynamic analyses were performed. A differential dynamic between the Omicron waves was found. The third wave was associated with lineage BA.1, characterized by a high number of cases, very fast displacement of Delta, doubling times of 3.3 days and a low level of lineage diversity and clustering. In contrast, the fourth wave was longer but associated with a lower number of cases, initially caused by BA.2, and later by BA.4/BA.5, with doubling times of about 10 days. Several BA.2 and BA.4/BA.5 sublineages and introductions were detected, although very few clusters with a constrained geographical distribution were observed, suggesting limited transmission chains. The differential dynamic could be due to waning immunity and an increase in population gatherings in the BA.1 wave, and a boosted population (for vaccination or recent prior immunity for BA.1 infection) in the wave caused by BA2/BA.4/BA.5, which may have limited the establishment of the new lineages., La lista completa de autores que integran el documento puede consultarse en el archivo., Facultad de Ciencias Exactas

Published
2023
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46. Cirurgia de columna vertebral als hospitals públics de Catalunya: proposta organitzativa

Author

Lafuente, Jesus, Minguell-Moñart, Joan, Torner, Pere, Rimbau Muñoz, Jordi, Cruz Olivé, Enric, Pallisó Folch, Francesc, Nogales López, Julio, Godino Martinez, Oscar, Mateo Olivares, Llorenç, Salo, Guillem, Dominguez Alonso, Carlos, Surís, Xavier, Pozuelo, Alfonso, Casanovas-Guitart, Cristina, Guarga-Rojas, Alejandro, Pons-Vigués, Mariona, [Lafuente Baraza J] Societat Catalana de Neurocirurgia, Barcelona, Spain. [Minguell Moñart J] Hospital Universitari Vall d’Hebron, Barcelona, Spain. [Torner Pifarré P] Hospital Clínic i Provincial de Barcelona, Barcelona, Spain. [Rimbau Muñoz P, Dominguez Alonso C] Hospital Universitari Germans Trias i Pujol, Badalona, Spain. [Cruz Olivé E] Hospital General de Granollers, Granollers, Spain. [Pallisó Folch F] Hospital Universitari Santa Maria de Lleida, Lleida, Societat Catalana de Cirurgia Ortopèdica i Traumatologia (SCCOT), Barcelona, Spain. [Nogales López J] Hospital de Tortosa Verge de la Cinta, Tortosa, Spain. [Godino Martínez O] Hospital Universitari de Bellvitge, Hospitalet de Llobregat, Spain. [Mateo Olivares Ll] Consorci Sanitari Alt Penedès i Garraf, Vilafranca del Penedès, Spain. [Salo Bru G] Hospital del Mar, Barcelona, Spain. [Surís X, Pozuelo A, Pons M, Casanovas-Guitart C, Guarga A] Àrea Assistencial, Servei Català de la Salut (CatSalut), Departament de Salut, Barcelona, Spain, and Departament de Salut

Subjects
instalaciones, servicios y personal de asistencia sanitaria::centros sanitarios::hospitales::hospitales públicos [ATENCIÓN DE SALUD], Catalonia, Cataluña, sistema musculoesquelético::esqueleto::huesos::columna vertebral [ANATOMÍA], Columna vertebral - Cirurgia, Hospitals públics - Catalunya, Otros calificadores::Otros calificadores::/cirugía [Otros calificadores], Health Care Facilities, Manpower, and Services::Health Facilities::Hospitals::Hospitals, Public [HEALTH CARE], Musculoskeletal System::Skeleton::Bone and Bones::Spine [ANATOMY], Other subheadings::Other subheadings::/surgery [Other subheadings]
Abstract

Cirurgia de columna vertebral; Hospitals públics; Organització Cirugía de columna vertebral; Hospitales públicos; Organización Spinal surgery; Public hospitals; Organization Els objectius d'aques document son: 1. Consensuar els criteris d’indicació de la cirurgia de columna vertebral en diferents situacions clíniques. 2. Analitzar i definir els diferents nivells quirúrgics segons complexitat de la cirurgia de columna vertebral en la població de Catalunya. 3. Establir els criteris i requeriments mínims dels centres hospitalaris per proveir cirurgia de columna vertebral segons els nivells de complexitat a Catalunya.

Published
2022

47. Evaluación de la efectividad de sistemas de extracción de humos en soldadura por arco.

Author

ROJAS ALEJANDRO, FRANCISCO JAVIER, ZINGG ROSELL, AUGUSTO FELIPE, VÁSQUEZ ROMERO, ISSAAK RAFAEL, and BUENDÍA MOLINA, MARILYN AURORA

Subjects
*ELECTRIC welding, *THRESHOLD limit values (Industrial toxicology), *INDUSTRIAL hygiene, *CARBON monoxide, *VOLATILE organic compounds, *GASWORKS, *OCCUPATIONAL exposure, *FORMALDEHYDE, *WELDING, *INDUSTRIAL safety, *FUME control
Abstract

This study focused on evaluating the effectiveness of various welding processes in reducing volatile gas emissions in work environments, a crucial factor for occupational health and safety. Comparative tests were carried out on three common welding processes: SMAW, GMAW and GTAW, with a focus on the concentration of formaldehyde and other volatile organic compounds (VOCs) in the air. The results revealed high statistical significance between treatments, confirming substantial differences in VOC emissions. The Tukey test identified the GTAW (TIG) process as the most efficient, with a concentration of total volatiles of 0.0557 mg/m?, well below the threshold of 0.2 mg/m?, where it is expected that no irritation or symptoms of discomfort. In contrast, the SMAW and GMAW processes showed concentrations that could lead to irritation or discomfort. Choosing the appropriate welding process is revealed as a critical factor in reducing VOC emissions and protecting workers' health. VOCs, including formaldehyde and carbon monoxide, can have adverse health effects on workers, and compliance with occupational exposure limits is essential. [ABSTRACT FROM AUTHOR]

Published
2023
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48. Metal Micronutrient and Silicon Concentration Effects on Growth and Susceptibility to Pythium Root Rot for Hydroponic Lettuce (Lactuca sativa).

Author

Helms, Kalyn M., Dickson, Ryan W., Bertucci, Matthew B., Rojas, Alejandro A., and Gibson, Kristen E.

Subjects
HYDROPONICS, ROOT rots, LETTUCE, PYTHIUM, LETTUCE growing, COPPER, ROOT diseases, METALS
Abstract

The objectives were to evaluate the effects of increasing metal micronutrient concentrations and silicon (Si) concentrations on plant growth and susceptibility to Pythium root rot with hydroponically grown lettuce (Lactuca sativa). In the first experiment, lettuce was grown in hydroponic solutions with metal micronutrients iron (Fe), manganese (Mn), copper (Cu), and zinc (Zn) supplied at either 0, 2.5, 5, or 10 mg∙L−1. A standard commercial hydroponic solution was also included as a control, with metal micronutrients supplied at 2 Fe, 1 Mn, 0.5 Cu, and 0.5 Zn mg∙L−1. In the second experiment, hydroponic lettuce was grown with Si at 0, 7, 14, 28, and 56 mg∙L−1. Hydroponic treatment solutions for both experiments were either dosed with Pythium myriotylum (Pythium treatment) at 1.80 × 104 oospores per L or deionized water as a non-Pythium control. Data were collected on leaf SPAD chlorophyll content, shoot height and width, total plant fresh mass, and root disease severity. Increasing the Cu concentration in solution decreased Pythium disease severity but reduced lettuce growth and yield. Increasing the concentration of the other metal micronutrients also tended to reduce lettuce growth but had no significant influence on root disease. Supplementing the hydroponic solution with Si had no effect on Pythium root disease severity and slightly decreased lettuce growth at 56 mg∙L−1 Si. Results of this study suggest that the management of micronutrients and Si nutrition is not an effective strategy and, at best, a risky strategy for controlling Pythium in hydroponic lettuce. Growers would likely benefit from maintaining metal micronutrient and Si concentrations within the ranges of (in mg∙L−1) 0.5 to 5.5 for Fe, 0.1 to 2.0 for Mn, 0.1 to 0.6 for Cu, 0.1 to 0.6 for Zn, and 0 to 28 for Si for many hydroponic crops. Supplementing Si has the potential to negatively influence plant growth and quality for certain plant species, and testing is necessary to evaluate phytotoxicity risks prior to implementing in commercial practice. Overall, successful mitigation of root rot pathogens in commercial hydroponic production requires the combination of proper sanitation, best management and cultural practices, appropriate hydroponic system design, and the implementation of a water treatment system with proper design and a multi-barrier approach. [ABSTRACT FROM AUTHOR]

Published
2023
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49. Patrones de aprovisionamiento de sílex de las comunidades superopaleolíticas del Pirineo occidental: el coste como medida de análisis a partir de los SIG

Author

Aitor SÁNCHEZ, Eder DOMINGUEZ-BALLESTEROS, Maite GARCÍA-ROJAS, Alejandro PRIETO, Aitor CALVO, Javier ORDOÑO

Subjects
Cost Distance Analysis, Unidades de Coste, difusión del sílex, lógica difusa, Paleolítico superior, Auxiliary sciences of history, Archaeology, CC1-960
Abstract

Los estudios referentes a la gestión de los recursos líticos -especialmente el sílex- por parte de los grupos prehistóricos en las dos vertientes del Pirineo occidental han aumentado de manera considerable en las últimas décadas. En este trabajo, pretendemos realizar una aproximación a la movilidad de los grupos superopaleolíticos, mediante los Sistemas de Información Geográfica (SIG). Estos nos permiten relacionar espacialmente los afloramientos de sílex y los restos líticos encontrados en los yacimientos arqueológicos. Para ello, hemos construido, a través de los Cost Distance Analysis, una serie de mapas que permiten detectar las dinámicas de expansión de cada uno de afloramientos, así como los patrones de aprovisionamiento de cada yacimiento. Adicionalmente, hemos relacionado los valores numéricos obtenidos del análisis espacial con la cantidad de sílex encontrado en cada nivel arqueológico a partir de estadística descriptiva y la aplicación de la lógica difusa. De esta forma hemos podido revisar los conceptos de autoctonía y aloctonía, así como plantear modelos generales de aprovisionamiento y distribución de sílex en la región.

Published
2016

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