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Dynamic kinetic data collected over commercial V2O5-WO3/TiO2 and Fe-zeolite catalysts analyzing the standard NH3-SCR of NO for the abatement of NOx from vehicle exhausts showed transient effects at low temperatures related to the inhibiting action of excess ammonia. In order to describe such transient effects, a specific rate expression accounting for NH3 inhibition of the standard SCR reaction is needed in mathematical models of real SCR converters. We present herein a dual-site Mars-Ven Krevelen-type rate equation suitable to describe dynamic features associated with ammonia injection and shut-off over both V-based and Fe-zeolite catalysts. Les données cinétiques dynamiques recueillies sur des catalyseurs V2O5-WO3/TiO2 et Fe-zéolite commerciaux en analysant le RCS-NH3 standard du NO pour la réduction des NOx des gaz d’échappement de véhicules ont montré des effets transitoires à basse température, liés à l’action inhibitrice d’ammoniac en excès. Afin de décrire de tels effets transitoires, une expression de la vitesse spécifique prenant en compte l’inhibition par NH3 de la réaction de RCS standard est nécessaire pour des modèles mathématiques de convertisseurs par RCS réels. Nous présentons ici une équation de vitesse de type Mars-Van Krevelen à double site pour décrire les caractéristiques dynamiques associées à l’injection et à l’arrêt de l’ammoniac sur des catalyseurs à la fois à base de V et Fe-zéolite.

Beberapa bukti menyatakan bahwa kegiatan fisik yang dilakukan secara konsisten dipengaruhi oleh kenikmatan dalam melakukan kegiatan fisik tersebut. Tujuan dari penelitian ini adalah untuk menghasilkan pengetahuan tentang kegiatan fisik dan kenikmatan berolahraga berdasarkan gender, urbanitas dan jenjang pendidikan. Penelitian ini merupakan penelitian komparatif korelasional. Populasi penelitian ini terdiri dari seluruh pelajar di Indonesia. Besar sampel penelitian ini adalah 7207 siswa yang terdiri dari 1224 pelajar SD, 3023 Pelajar SMP, 2960 pelajar SMA. Temuan penelitian ini adalah sebagai berikut: Aktivitas fisik tidak memenuhi kriteria baik, kenikmatan berolahragamemenuhi kriteria baik, terdapat perbedaan kegiatan fisik berdasarkan gender dan jenjang pendidikan, tidak terdapat perbedaan kegiatan fisik berdasakan urbanitas, terdapat perbedaan kenikmatan berolahraga berdasarkan gender dan jenjang pendidikan, tidak terdapat perbedaan kenikmatan berolahraga berdasarkan urbanitas dan jenjang pendidikan, tidak ada perbedaan kenikmatan berolahraga berdasarkan gender, serta terdapat hubungan kegiatan fisik dan kenikmatan berolahraga pelajar Indonesia

In times of low season, the number of tourist visits to Pura Luhur Uluwatu experiences consistent fluctuations predominantly characterized by a year-on-year decline. Effective promotional strategies can enhance awareness of Pura Luhur Uluwatu among tourists, even during non-peak periods. The objective of this research is to determine the appropriate promotional strategies by analyzing the strengths and weaknesses of internal factors, as well as the opportunities and threats posed by external factors. Data for this study were gathered through observations, interviews, documentation, and a review of relevant literature. The data analysis involved a qualitative descriptive approach and a SWOT analysis (Strengths, Weaknesses, Opportunities, Threats).The findings of this research elucidate that the promotional strategy at Pura Luhur Uluwatu encompasses a combination of advertising and Public Relations. The strategies formulated within the SWOT analysis include leveraging technology to showcase the scenic beauty, utilizing technology for public relations, provide training to working staff, offering discounts through social media, marketing the temple on online booking platforms, and providing special promotions for online bookings. With these results, this conceptual framework can serve as a reference for the management of Pura Luhur Uluwatu to develop more effective strategies in addressing challenges and capitalizing on identified opportunities. It can also aid in planning concrete steps to enhance the visitor experience, optimize human resource utilization, and ensure operational sustainability during the low season.

The agricultural industry is critical in supplying food and fiber demands, but there is a demand-supply imbalance due to decreased land availability. Hydroponic techniques can be utilized to alleviate agricultural land loss by using water as a growing medium. Farmers must constantly examine plant condition and harvesting schedules. The pH of the water and nutrients are important indications for hydroponic farmers to monitor. Therefore, the implementation of the Internet of Things (IoT) allows farmers to conduct real-time monitoring more easily and regularly. IoT is defined as a system that allows integrated hardware to communicate with the internet network. The IoT device is built by attaching a NodeMCU 8266 microcontroller to an adapter, which provides electrical voltage while also regulating a water pump that delivers nutrients and water to plants. The acquired data is then transmitted to the blynk program, allowing real-time monitoring of the results via a smartphone. The present research system's usefulness and performance are improved by including pH and TDS sensors. The average accuracy of pH monitoring utilizing a pH sensor and a manual pH meter was 92.09%. Meanwhile, the average accuracy of nutrient monitoring utilizing TDS sensors and a TDS meter was 73.19%.

The COVID-19 pandemic that is currently happening in Indonesia has had a major impact in all fields, one of which is education. In this pandemic period, education in Indonesia must be carried out online, which results in the inhibition of direct interaction between teachers and students. Therefore, the Ministry of Education and Culture organizes a Teaching Campus program, which is part of the Independent Learning Campus (MBKM) policy. This Teaching Campus Program aims to provide solutions for elementary schools affected by the pandemic by empowering students who live around the school area to assist teachers in carrying out learning activities in the midst of the COVID-19 pandemic. The results of the study show that the implementation of the Class 2 Teaching Campus at Public Elementatry School 04 of Purwosari includes the following: First, teaching is carried out by home visits, through online media, and face-to-face (after limited PTM verification). Second, technology adaptation by helping teachers prepare materials sent via WhatsApp media, and third, assisting administration in the form of allocating textbooks in libraries and collecting student data.

Reduction of NO by NH3 over metal-promoted zeolites represents the principal reaction in the selective catalytic reduction (SCR) technology for NOx removal from Diesel engine exhausts. It has been established that addition of ammonium nitrate (AN) to the reaction mixture substantially enhances the rate of this reaction, decreasing the temperature necessary for an efficient deNOx process. Nevertheless, the nature of this effect has not been completely elucidated. To investigate the NO + AN reaction mechanism, we have used individual reactants labeled with either 15N or 18O (or both isotopes), thus obtaining an experimental background for proposing the route of the SCR accelerated by AN addition. For this study, we have used as the catalysts H-BEA and Fe/H-BEA zeolites with various Si/Al ratios and various amounts and states of the iron species. [ABSTRACT FROM AUTHOR]

This paper discusses trends, challenges, and perspectives in logistics system of Indonesia during and post (new normal) of Covid-19 pandemic. PSBB (Large-Scale Social Restriction) caused a number of supply chains to be cut and made railroad transportation activities decreased. On the other hand, WFH (Work From Home) caused sector of e-Commerce to grow during the pandemic. Challenges in logistics system of Indonesia during the pandemic are changes in distribution patterns, changes in handling processes, changes in facilities and equipment, changes in business processes, and changes in networks. Adaptations in logistics system during the pandemic are using ICT (information and communication technology) such as TMS (Transportation Management System) and EDI (Electronic Data Interchange) and considering health. WMS (Warehouse Management System) still has a great opportunity to be utilized. The adaptations raise a new discipline in Industrial Engineering, namely logistics hygienic. The use of various ICTs in logistics system together with implementation of health protocols are expected to be a solution for logistics system in Indonesia, especially for the new normal of Covid-19 pandemic.

Pantai Trisik merupakan area lahan basah yang terletak di bagian selatan Daerah Istimewa Yogyakarta. Kawasan Pantai Trisik berperan penting bagi kehidupan burung pantai. Tujuan penelitian yaitu menganalisis komunitas dan guild pakan komunitas burung di kawasan Pantai Trisik. Penelitian dilaksanakan pada Bulan Oktober 2018 – Januari 2019 dengan teknik point count. Komunitas burung pantai di kawasan Pantai Trisik terdiri dari 22 jenis yang terbagi menjadi burung pantai migran dan residen. Tipe guild komunitas burung pantai di kawasan ini terbagi menjadi tiga kelompok guild pakan yaitu mollucivore, insectivore dan omnivore. Berdasarkan cara mendapatkan makanan, tipe guild mollucivore dikembangkan menjadi tiga tipe subguild. Tipe guild insectivore terdiri dari satu tipe guild. Tipe guild omnivore dikembangkan menjadi sepuluh tipe. Tipe guild yang paling banyak ditemukan adalah tipe guild omnivore sebanyak 17 jenis (77%). Kata kunci: komunitas burung, guild, burung pantai, kekayaan jenis

Introduction. This research aims to determine the utilization of social media, especially Facebook in academic libraries. It explores the impact of Facebook content to user activity with the level of user engagement. This research is considered signifincat due to the fact that social media has not been used optimally by the libraries. Data collection methods. This research used a qualitative approach method with interviews by considering user engagement parameters in 4 categories: (1) Literature Exhibits (2) Engaging topic (3) Community Building (4) Library showcasing. This study also used data histories and Facebook content. Using 5 state academic libraries, the data was gatheres by grouping the data of the user engagement with the followers’ response including activities of like, comment, shares from each account. Analysis Data. This research was analysed by using a content analysis. Results and discusions. Most libarires post the category of Library Showcasing, while most users respond to the category Enganging Topics. Facebook has effects of increasing user engagement . It is found that there is a mismatch between postings from admin staff and the follower responses. Conclusions. Social media function in library is considered as an effective channel of communication, promotion, marketing as well as to improve user engagement. The decicion making related to library services by utilizing social media has not been conducted.

The optimal use of libraries is through user education, because through this program users get a series of knowledge about information sources. One way to find out the success of a program is to do an assessment. This study aims to evaluate the implementation of user education that has been implemented in the Library of the Faculty of Engineering UGM. CIPP Model (Context, Input, Process & Product) used for evalution with a qualitative approach. Research subjects were members of the UGM Faculty of Engineering who had attended user education programs and library management team. Data collection is done with documentation, interviews, and observations. The results showed (1) the Context evaluation was good, there was a match between the program with the vision and mission of the institution, (2) Evaluation of inputs was good, supporting facilities and facilities were adequate, (3) Process evaluation was sufficient, the implementation schedule needed to be improved, ( 4) Evaluation of the product is good, there is a certificate as a sign of following the activity by achieving the competency that has been set. The factors that support the implementation of the program are competency of human resources, communication, adequate facilities and infrastructure, and good cooperation with stakeholders. The factors that hinder the program are the schedule of activities that are not yet routine, those responsible for the program cannot be delegated to other people, there is no analysis of student needs, and there is no written policy on this program. The recommendation of this research is that it is necessary to improve several inhibiting factors so that the implementation of user education activities can run smoothly in accordance with the stated goals.

This study aims to identify the existence of fraud that appears in the practice of budget preparation. It is a case study conducted in Blue Zone Regional Device by using participant observation method. The informants were the financial managers. The results showed that fraud on budgeting involves all parties ranging from planners, PPTKs, executive staff, and exchequer. Besides that, fraud on budgeting occurs in the form of commitments (fees), separation of funds for non-budgetary activities (pressure), the use of legal gaps that are less effective supervision system (opportunity) and assume reasonable what is done and all the Regional Tools do their jobs (rationalization)

The modeling of dynamic hysteresis loops of soft magnetic materials is carried out using extended hyperbolic model. The extension is based on pure phenomenological approach and consists in elliptical component addition. This component features rounded shapes of dynamic hysteresis loops at low intensities of magnetization and it needs two parameters only. Fitting parameters for each loop are searched individually, and their dependences are then approximated by rational functions. The final model operates with approximated parameters. Proposed model was tested for the material FeNi47Cu5 at sinusoidal excitation at frequency 50 Hz. [ABSTRACT FROM AUTHOR]

The study of the gas-phase NO reduction by H2 and of the stability/reactivity of NO x stored over Pt–Ba/Al2O3 Lean NO x Trap systems allowed to propose the occurrence of a reduction process of the stored nitrates occurring via to a Pt-catalyzed surface reaction which does not involve, as a preliminary step, the thermal decomposition of the adsorbed NO x species. [ABSTRACT FROM AUTHOR]

The NOx storage process over Ba/Al2O3 and Pt–Ba/Al2O3 NSR catalysts has been analyzed in this study by performing experiments at 350 °C with NO2 and NO/O2 mixtures using different complementary techniques (Transient Response Method, in situ FT–IR and DRIFT spectroscopies). The collected data suggest that over the Pt–Ba/Al2O3 catalyst the NOx storage process from NO/O2 mixtures occurs forming at first nitrite species, which progressively evolve to nitrates. In addition, a parallel nitrate formation via disproportionation of NO2 (formed upon NO oxidation) cannot be excluded. [ABSTRACT FROM AUTHOR]

This work aims to investigate the possibility to apply open-cell foams as catalytic substrates in SCR systems for Diesel engines, as a replacement of traditional honeycombs. In the literature, many studies compare the performance of foams and honeycombs as catalytic substrates, showing, in general, a better mass transfer behavior in foams, compensated on the other hand by a higher pressure drop. In this work, we consider the low-pressure injection of Ad-Blue and we evaluate the performance of the open-cell foam in enhancing the mixing and the evaporation of the spray. A Eulerian-Lagrangian CFD model has been adopted to simulate the spray evolution and its interaction with the microstructure of the open-cell foam. The model has been applied to evaluate the spray evaporation and the uniformity of the ammonia distribution in different sections of the substrate. Different operating conditions were tested comparing substrates with different geometrical properties. The results of this preliminary analysis can be regarded as promising, showing the capability of the foam to enhance the mixing of the spray and to achieve a uniform distribution of the ammonia over all the catalyst substrate.