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Keraton Kasepuhan Cirebon has collection of five old manuscripts of European origin from 19th century, and the former library of Faculty of Humanities Universitas Indonesia has collection of four old manuscripts of European paper origin from 19-20th centuries. The objectives of this study were to isolate and morphologically characterize fungi from nine old manuscripts of European origin. All manuscripts showed brown and black spots, and fungal spores on the surfaces. Observation by loop was carried out in the field to determine the type of paper and to detect biodeterioration of the manuscripts. Twenty-two fungal isolates were obtained by sterile cotton swab and the culture-dependent method on Dichloran Glycerol Agar (DG18). Detection of fungal deterioration on paper was investigated by using paper strip method with old paper of European origin on Czapek's Dox Agar (CDA) without carbon source. The paper strips were inoculated with cell suspension at a concentration of approximately 1x107 cell/mL. Twenty fungal isolates were able to grow on the old paper strips indicating that the old manuscripts are liable to fungal degradation. The fungal isolates were xerophilic in nature. Morphological characterization described the fungal isolates in the genera of Aspergillus, Penicillium, and Eurotium. Three fungal isolates could not be described and were grouped as Mycelia sterilia. Basic local alignment search tool (BLAST)-based identification and phylogeny-based identification using the data set of internal transcribed spacer (ITS) sequences is required to determine the species identities of the fungal strains. [ABSTRACT FROM AUTHOR]

Leachate wastewater from pulp and paper industry is known for containing various types of heavy metals such as Cd (Cadmium), Ba (Barium) and Cu (Cuprum). The existence of heavy metals that accumulates and eventually exceeds certain threshold concentrations will cause environmental pollution, therefore it is necessary to conduct wastewater treatment to eliminate or at least reduce the heavy metal content in industrial wastewater. One of the most commonly used wastewater treatment method is using adsorbent, this study uses adsorbent made from the mixture of clay, zeolite and activated carbon formed into ceramic balls with ± 0.5 cm diameter. The ratios of the mixture of clay, zeolite and activated carbon are 6:3:1; 6:2,5:1,5; 6:2:2; 6:1,5:2,5 and 6:1:3 with variations of contact time 30, 60, 90, 120 and 150 minutes. The most favorable concentration reduction of heavy metals occurred at the longest contact time of 150 minutes at 6:3:1 adsorbent ratio, Cd concentration decreases from 0.65 mg/L to 0.03 mg/L, Ba concentration decreases from 0.86 mg/L to 0.04 mg/L and Cu concentration is from 0.6 mg/L to 0.02 mg/L. These prove that the ceramic zeolite/carbon-ceramic composite adsorbent can be an alternative to treat wastewater containing heavy metals derived from the pulp and paper industry. [ABSTRACT FROM AUTHOR]

Recycled paper mill effluent (RPME) contains high concentrations of organic matters and total solids, and therefore requires proper treatment prior to discharge. There is a lack of experimental data available on the biodegradation of solids contents of RPME and digested sludge in anaerobic reactors. In this study, the treatment of RPME was studied using five compartments modified anaerobic inclining-baffled reactor (MAI-BR). The compartmental profiles of TSS, VSS, TDS and lignin contents, and floc size were investigated at different influent chemical oxygen demand concentration (CODin) from 1,000 to 4,000 mg/L, and hydraulic retention time (HRT) from 3 to 1 days (corresponding to organic loading rate (OLR) from 0.33 to 4 g/L day). The results showed that the contents of TSS, VSS and lignin were the highest at Compartment 1 (14,818-32,130 mg/L), (6,772-20,548 mg/L) and (7-227 mg/L), and gradually decreased towards Compartment 5 (627-8,518 mg/L), (281-6,145 mg/L) and (7-22 mg/L), respectively. Conversely, the content of TDS was low at Compartment 1 (508-712 mg/L) and slightly increased towards Compartment 5 (531-836 mg/L). Throughout 126 days, the floc size at Compartmental 1 was increased from 104 to 731 μm, similarly for other compartments. These results concluded that Compartment 1 played a major role in the operation of MAI-BR treating RPME. [ABSTRACT FROM AUTHOR]

The use of facial recognition method has spread to many different industries, most notably smart attendance systems. But one major obstacle these systems must overcome is spoofing, which is the practice of people trying to trick the system by utilizing counterfeit or modified photos or videos. In the context of a smart attendance framework, this paper presents a smart anti-spoofing mechanism that can distinguish amongst real and fake faces with accuracy. The system that has been developed entails the generation of datasets that contain both actual and fake facial photos and videos, in addition to the application of a feature extraction and classification pipeline that is driven by deep learning. Furthermore, a number of data augmentation techniques, including translation, scaling, and rotation, are used to improve the effectiveness of the suggested system against different spoofing strategies. Empirical results show that these strategies support increased accuracy and durability in thwarting various spoofing attack types. With a 97% recognition rate overall, our anti-spoofing/mocking technology affords a stable and secure foundation for intelligent attendance systems. The study emphasizes how effective it is to create a strong anti-spoofing system specifically for keen attendance applications by integrating deep learning and soft computing models. [ABSTRACT FROM AUTHOR]

In this paper, we studied the barrier, strength and deformation properties of paper coated with biomodified gluten. The results shows the giving grease-resistance to this composite (Kit score 21) and resistance to water vapor permeability with an experiment duration of 40 days. Strength of samples was increased of more than 40% and deformation of samples was increased of more than 30% as a result of biomodification of gluten, were investigated. [ABSTRACT FROM AUTHOR]

In this paper, we report an extremely low cost and highly efficient method for fabrication of visible light photo-detector using nano-crystalline lead sulfide (PbS) thin film. The film was fabricated on 300 GSM paper via spray pyrolysis technique at 100 °C. Structural and morphological analysis of the film confirms the nano-crystalline nature of PbS with size ∼ 50 nm and uniform coating of PbS on paper. Photo-detector devices are prepared by drawing contacts using 4B pencil on the film by keeping a gap of 1 mm between electrodes. Photo-detection property of a nano-crystalline PbS thin film under visible light illumination show linear I-V suggesting low resistive contact between graphite electrode and PbS film. The photo-sensitivity measurements reveal excellent sensitivity of ∼103 at 20 V. For this graphite/nano- PbS/paper photo-detector, the best rise and decay time is observed to be 7 and 16 ms, respectively. This simple and low cost fabrication method results in highly stable and sensitive photo-detectors device, which have fast response and decay time. [ABSTRACT FROM AUTHOR]

An innovation in paper technology that is totally different from the papermaking technology that has been known now, has been found in the 21st century in China. This new discovery paper does not use cellulose fibers as its raw material, and does not use water at all in its production process. Because it is made of inorganic mineral coming from calcite rocks, this paper is called 'rock paper' or stone paper. The process of stone papermaking in principle mixes fine powder of calcite rock with non-toxic resin, one of which is HDPE (high density polyethylene), as well as other additives, then melted at high temperatures and formed into a sheets like paper. The properties of stone paper are very similar and even have advantages compared to conventional paper. This type of paper is claimed to be more environmentally friendly than conventional paper because it does not use plant fibers as raw material, which means there is no trees cut. It can be recycled and produces low greenhouse gas emissions. [ABSTRACT FROM AUTHOR]

Research on the manufacture of nylon-dithizon membranes for the early detection of lead heavy metal using the vacuum impregnation method. The purpose of this study was to determine the manufacture of nylon dithizon membranes and test strips as dithizonate complexes as an early detection of lead heavy metal. Making nylon-dithizon membrane by dissolving 50 mg of dithizon with 100 mL of chloroform and the addition of 50 mg of SrCl2 then stirred using a magnetic stirrer at 100 rpm as the working solution. After that, the solution was impregnated into a 0.20 m nylon membrane using a Buchner vacuum, after which it was carried out for 12 hours in a fume hood. The dithizon strip test was carried out using the colorimetric method, namely observing color changes that occur with the naked eye (qualitative test) with variations in concentration and pH. In this study, the optimum pH in the formation of the dithizone-Pb complex was obtained, namely pH 8 with a dark orange color. The minimum concentration on the indicator strip made was 0.05 with a visible color of faded orange, while the time reached for complex formation at a concentration value of 0.05 ppm was 520 seconds (Faded Orange). [ABSTRACT FROM AUTHOR]

Numerous human activities and a rapidly growing world population are increasing the demand for freshwater. Fresh water production relies heavily on the use of conventional fuels and is associated with environmental pollution, leading to the need to look for other alternatives such as clean energy (solar energy). There are many villages and rural areas in the world without access to clean water. Many desalination systems have been developed to address this shortcoming. This study describes strategies for increasing clean water solar energy productivity that are currently in commercial and experimental development stages. Solar stills are the most prudent method for delivering new water since they just sudden spike in demand for the energy of the sun, which is promptly accessible in nature. The focus is on technologies that can be used independently, especially those that can be integrated into solar thermal systems. The results show that the solar thermal distillation yield is inversely proportional to the basin water depth and is directly related to the wind speed in the absorbing region, the temperature of the glass covers and the incident solar radiation. Add to the technology used inside and outside the system to improve productivity. [ABSTRACT FROM AUTHOR]

Synthesis of C-Dots from waste paper has been successfully created. A total of 5 grams of waste paper is mixed with 40 mL aquades, 30 mL H2SO4 and 50 mL NaOH 2 M. A precursor solution is prepared by adding urea in 20 ml of material. Synthesis of C-Dots done by heating the precursor hydrothermally using a furnace with three conditions, namely with 1-4 grams of urea, 20-50 minutes of synthesis time, and 150-300°C of temperature. In a variation of urea and time, the temperature is controlled at 300°C. In a variation of the time and temperature, urea is controlled at 3 grams. In a variation of the urea and temperature, time is controlled for 30 minutes. The maximum absorption C-Dots generated on the various of amount urea, temperature, and synthesis time in the range of 360-600 nm. The width of the absorbance area was increased by adding 1-3 grams of urea and were decreased when urea is added 4 grams or more. The absorbance peaks of C-dots decreases with increasing temperature synthesis. Meanwhile, an increasing of synthesis time does not affect to the width of the absorbance spectra. It precisely causes decreasing of peaks of the absorbance spectra. The functional groups present on the surfaces of C-dots can be identified by the presence of specific peaks in their FTIR spectra, i.e. N-H, C=C, C-N, and C-C at various urea, N-H, C=O, C=C and C-O at temperature and synthesis time. [ABSTRACT FROM AUTHOR]

This paper describes the implementation of Automated Centralized Certificate Management System based on Automatic Certificate Management Environment (ACME) protocol within the Academic Scientific Research Computer Network of Armenia (ASNET-AM). Digital certificates are one of the major instruments, used for most network services today. The work done in ASNET-AM is based the recent availability of free wildcard SSL/TLS certificates from some certificate authorities (CA) like LetsEncrypt. The concept of implementing automated centralized certificate system was presented at CSIT 2019 Conference and this paper summarizes its implementation done during past years. The system described is now actively used in production and provides centralized secure and automated digital certificates service for different types of ASNET-AM network services such as web servers, mail servers, etc. [ABSTRACT FROM AUTHOR]

In most nations, lung cancer (LC) is the main cause to mortality cases occurring due to tumors to males and females. Lung nodules (masses) are recognized through digital technologies support precise diagnosis using medical imaging techniques such as CT-scan, X-rays and MRI. As the nodules are normally connected to the blood vessels, identification of lung nodules is a difficult task. Several studies illustrate that diagnosing or detecting such cases earlier is regarded the best successful method to counter this disease. Many systems have been developed that automatically identify lung tumors by using magnetic resonance spectroscopy and pattern recognition methods. Despite the encouraging consistency of the classification, none of these schemes have set their course in clinical practice, which also concerns the lack of clarity concerning the process of taking decisions. In this paper, we present a systematic mapping study on lung tumors recognition. After four sorting methods, we obtained 375 relevant studies in total. After applying four filters manually, 48 papers as primary studies related to the main topic are selected as listed in Appendix (A). The selected papers classified them with respect to several facets. The results provide an overview of the existing relevant studies in reported in the literature, highlight focus areas and research gaps. [ABSTRACT FROM AUTHOR]

Electrophotography is a process of digital printing in which master is stored and processed as a digital file. This process was invented by Chester Floyd Carlson who was an American physicist. Various developments in this process have resulted in improved print quality. Depending upon the type of toner used, Electrophotography can be classified into two types: 1) Liquid Toner Electrophotography 2) Dry Toner Electrophotography. Toner particle size of Dry Toner Electrophotography is equal to or larger than 5 µm and that of Liquid Toner Electrophotography is equal to or smaller than 2 µm. This study was conducted to analyze the print quality of Liquid Toner and Dry Toner Electrophotography process on the basis of Print Contrast and Dot Gain. Good Print Contrast represent good details in the shadow area. Low Dot Gain helps in controlling unintentional density increase resulting in reproduction of halftone details appropriately. This study was conducted on presses using Liquid Toner and Dry Toner Electrophotography Technology for generating prints. HP Indigo 5600 was used for Liquid Toner Electrophotography prints and Xerox Versant 2100 was used for Dry Toner Electrophotography prints. Prints were taken on Gloss Coated Paper having grammage of 200 GSM. Total 100 (50 each) sheets were printed using both technologies. X-rite exact Spectrophotometer was used for analyzing the results. For this study, Print Contrast is measured at 80 % tonal value and Dot Gain is measured at 50 % tonal value. Results of this study shows that Print Contrast of Cyan, Magenta and Yellow color is lesser and that of Black color is higher for the samples printed by Liquid Toner Electrophotography. Dot Gain of Magenta and Black Color is lower and that of Cyan and Yellow color is similar for the samples printed by Liquid Toner Electrophotography. Consistency of Print Contrast and Dot Gain is higher for the samples printed by Liquid Toner Electrophotography. [ABSTRACT FROM AUTHOR]

Bacterial cellulose (BC) is a type of cellulose produced by bacteria in a glucose-based medium that has more advantages than plant cellulose. The production of cellulose powders, however, has the characteristics affected due to physical treatments; thus, the objective of this research was to produce BC powder for use in paper production. BC was produced by agitation with oxygen flow at various rotational speeds to obtain a fragmented BC phase. BC samples were dried by a spray dryer to produce powder for paper making. The characterization of BC powder and paper samples was done by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), tensile strength, and scanning electron microscopy (SEM). The morphological results showed optimum BC was produced at 300 rpm rotation speed with a 405.2 g yield, while the FTIR spectrum confirmed that the material is a cellulosic compound. TGA characterization of the optimum sample displayed thermal stability at 330 °C in the thermal analysis. Among the variations in rotational speed, the 300 rpm sample led to the highest Young's modulus value, 878 MPa, and the most improved surface morphology. [ABSTRACT FROM AUTHOR]

We studied the physico-mechanical and dynamic mechanical properties of a rubber compound by substituting precipitated rice husk silica (RHS) for N347 carbon black in this paper. Throughout the experiment, 100% Carbon black (Compound-A) (CB:70phr) was replaced with 100% RHS (Compound-B) (RHS:70phr). We also investigated 50% carbon black replacement with 50% RHS (Compound-C) (CB:RHS:35:35Phr), and increasing total amount of filler (Compound-D) (CB:RHS:35:45Phr) by increasing RHS. The cure characteristics, physico-mechanical properties, and dynamic mechanical properties of compounds were studied. The study revealed that replacing N347 carbon black with RHS (Compound-C) by 50% resulted in comparable physical properties, higher rebound resilience at 100°C, lower heat buildup, higher abrasion resistance index, and lower dynamic modulus and tan delta. A recipe containing more filler (Compound-D) improved dynamic modulus at the expense of some elongation at break. In applications where dynamic modulus is not as important, this sustainable filler could be used as a 50% replacement for N347 carbon black, with improved heat build-up, rolling resistance, and abrasion loss. If dynamic modulus is a concern, a higher amount of total filler could be used by increasing RHS, resulting in improved heat build-up, rolling resistance, and abrasion loss when compared to a 100% carbon black compound. However, elongation at break has been sacrificed. [ABSTRACT FROM AUTHOR]

Lignosulfonate is produced as a waste in the production of paper. Its sodium variant is used in the construction industry as a plasticizer and stabilizing additive in natural-based adhesives. It consists of components that have been subjected to ecotoxicity testing under REACH as individual components (sodium salts C14-16-alkanehydroxy and C14-16-alkene sulfonic acids, sodium hydroxide, octhilinone), not as a whole mixture. Therefore, ecotoxicological tests of the sodium lignosulfonate were performed in this study to assess environmental safety (100 mg/L). Testing was performed on four organisms: algae (Desmodesmus subspicatus) and crustaceans (Daphnia magna), yeast (Saccharomyces cerevisae), mustard (Sinapis alba) in acute aquatic tests. The results indicate stimulation of parameters in all model organisms, toxicity was not demonstrated. Therefore, sodium lignosulfonate probably acted as an eutrophicator in aqueous solutions. [ABSTRACT FROM AUTHOR]

Now a day face detection & facial expression recognition is one of the major challenging problemin the field of image processing. It is a challenging issue as human color, pose, expression, and orientation varies with regions. Therefore, to detect face & facial expression we need to accept different models & techniques. Detection of different facial expression based on movement of eyes, position of nose & nose tail, gradient of eye brows, movement of lips etc. Detection of facial expression can be done with the help of any neural network or fuzzy logic. This paper reviews different techniques of face detection & facial expression recognition. [ABSTRACT FROM AUTHOR]

This paper describes the fabrication and high-temperature mechanical properties of functionally graded materials (FGM) based on preceramic papers with Ti3Si(Al)C2 and Ti3Al(Si)C2 powder fillers. The FGMs with different architectures were fabricated by spark plasma sintering at a temperature of 1050°C and a pressure of 50 MPa. Mechanical testing of composites at 25℃ and 1050℃ demonstrated the brittle to plastic transition of fracture mechanism. At 1050 ℃ FGMs demonstrated strain for up to 1.5 % and flexural strength about 200 MPa. Due to migration of Al from A-site of MAX-phases and formation of Al2O3 a crack healing was noted after high-temperature mechanical tests. [ABSTRACT FROM AUTHOR]

Due to high densities of energy, power, and remarkable operational efficiency of Li-on battery when in contrast to Lead-acid batteries and nickel-cadmium batteries are examples of other types of batteries. Vehicles, electronics, aircraft, and other industries are all interested in lithium-ion batteries right now. However, some critical variables, such as performance degradation under extreme driving circumstances due to temperature difference in the lithium-ion cell, limit its usefulness. As a result, it's important to decide the optimal course of action based on the consequences of heat generation on various lithium-ion cell components. This paper looked at how heat is generated and how it affects each component of a li-ion battery. An analysis of different heat-controlling systems employing various design structures in numerous techniques of cooling such as liquid convection, phase transition material, air Convection and a combination of these techniques are used. Finally, utilizing a variety of design frameworks, a summary is created [ABSTRACT FROM AUTHOR]

In the practice of leading countries, digital transformation implies a sectoral principle of support for the introduction of new technologies. At the same time, programs and projects can be built both on the principle of implementing a single promising group of in several industries, where it is especially relevant, and, conversely, provide for the digital transformation of a particular industry through the forceful introduction of a multitude of technologically diverse solutions demanded in a given sector of the economy or social sphere. of a given sector of the economy or social sphere. Digital transformation affects a wide range of industries and organizations, from the most advanced in terms of digital adoption (e.g., financial services) to the more conservative real sector; this paper examines digital transformation in the agro-industrial complex (agriculture). The key task of digital transformation of agriculture is to extract value from the collected big data about the internal and external environment. The foundation for this is cloud platforms, big data solutions, predictive analytics technologies, and decision support systems decision support systems. [ABSTRACT FROM AUTHOR]

In this study, three types of recycled waste paper fibers were used to manufacture cement composites reinforced with recycled cellulosic fibers. Waste cellulosic fibers in quantity of 0.2, 0.3, and 0.5 wt.% were added to cement mixtures. Physical properties such as density, water capillarity, water absorbability and thermal conductivity of fiber cement composites were studied after 28 days of hardening. However, durability of composites was tested after their water storage up to 90 days. Final results of tested properties of fiber cement composites were compared with cement reference sample without cellulosic fibers. [ABSTRACT FROM AUTHOR]

This paper presents the laboratory result on compaction characteristic for soft soil subgrade which was stabilized by using waste paper sludge ash (WPSA). The soft soil sample was collected from Banting Selangor, Malaysia named as Banting soft soil and classified as slightly sandy Clay with intermediate plasticity. Additive of WPSA is a finely waste product produced from the incinerated waste paper. In ASTM C618, this WPSA samples are categorized as Type-C fly ash due to the high free lime (CaO) content (>20%) and possesses some cementitious and pozzolanic, resulting in the self-cementing characteristics. Therefore no entire activators such as lime are required. Objectives of this study are to determine the dry density and moisture content of Banting soft soil stabilized by WPSA through the different energy and method of compaction and to determine the Atterberg limit properties of Banting soft soil stabilized using WPSA. Several percentage of WPSA (4%, 8%, 12% and 16%) was used to stabilize the soft soil. Meanwhile the compactions methods are used in this study are standard proctor test and modified proctor test. The Atterberg limit properties testing involved the liquid limit testing, and plastic limit testing. The result showed the plasticity indexes of soft soil stabilized with series percentage (4%, 8%, 12% and 16%) of WPSA were reduced parallel to the increment of liquid limit and plastic limit result. Meanwhile, the compaction result for stabilized soft soil showed an increment dry density value followed by decrement of moisture content for modified compaction and standard compaction. However, 4% WPSA were giving the best of optimum moisture content and maximum dry density stabilized soft soil from modified compaction. From this experimental study, it shows that WPSA has a significant and effective to improve the geotechnical properties of soft soil. [ABSTRACT FROM AUTHOR]

Cancer is the uncontrolled growth of new cells beyond the normal limits. The process by which cancers invade and spread to the other organs is called metastasis, this condition became the leading cause of death. One of detection methods that are currently used to detect tumors and metastatic tissues is conducted with radiopharmaceutical of [18F] fluoro-2-deoxy-2-D-glucose ([18F] FDG). This method is quite accurate, but is relatively expensive because it needs PET / CT camera that is still limited in Indonesia. Therefore, this study was conducted to develop other imaging methods using SPECT-CT camera that is cheaper and easy to reach especially for developing countries. Labelling 2-deoxy-D-glucose with technetium-99m (99mTc) indirectly using diethylenetriaminepentaacetic acid (DTPA) as a co-ligand / bifunctional agent has been carried out. The determination of the optimum conditions for the labelling of 99mTc-DTPA-DG were done by varying the amount of reducing agent (SnCl2.2H2O), ligand (2-deoxy-D-glucose), pH, and incubation time. Radiochemical purity of 99mTc-DTPA-DG was determined by ascending paper chromatography and electrophoresis paper. The results showed that the labelling optimum conditions of 99mTc-DTPA-DG was achieved by the number of ligand 2-deoxy-D-glucose as much as 2 mg, co-ligand DTPA 750 µg, 50 µg SnCl2.2H2O, the reaction takes place at pH 6 with an incubation time of 30 min at room temperature. 99mTc-DTPA-DG has a radiochemical purity of 93.16±1.31% and the electrophoresis results showed that there is a difference between the peaks of 99mTc-DTPA-DG with other impurities including 99mTc-DTPA. [ABSTRACT FROM AUTHOR]

Cancer is the second leading cause of death globally and increasing every year, including in Indonesia. Promethium-149 (149Pm) is one of beta-emitting (Eβ-max of 1.07 MeV and T1/2 of 2.21 days) radiolanthanides that can be used for therapeutic application. Radioisotope of 149Pm can be produced with high specific activity that was suitable for labeling of biomolecule as a targeted radiopharmaceutical for cancer therapy. Radiochemical separation of 149Pm from irradiated of neodymium oxide (Nd2O3) target with 98.4% neodymium-148 (148Nd) isotope enrichment has been carried out based on extraction chromatography method using LN (Eichrom) resin column. The target material was irradiated at Bandung TRIGA 2000 reactor. Radiochemical purity the final product of 149PmCl3 radioisotope was determined using paper chromatography and paper electrophoresis methods. Radionuclide purity of 149PmCl3 solution was determined using a gamma-ray spectrometer equipped with HP-Ge detector and a multichannel analyzer (MCA). The results show that the optimum condition on separation of 149Pm from irradiated of Nd2O3 target with 98.4% 148Nd isotope enrichment was obtained using 1.5N HNO3 solution at temperature of 80 °C as mobile phase. The yield of 149Pm obtained from the separation was 97.8 ± 2.1%. The final product of 149PmCl3 radioisotope has physico-chemical characteristic that meet the requirements for nuclear medicine applications with radiochemical purity and radionuclide purity of 99.7 ± 0.2% and 99.9 ± 0.1%, respectively. The solution of 149PmCl3 was clear, with the pH of 1 and stable for 1.5 weeks at room temperature. [ABSTRACT FROM AUTHOR]

A recent technology has been introduced into the paper industry that makes possible to produce paper materials by replacing the cellulose fibres by a mineral powder, achieving a more environmentally friendly product compared with conventional paper. The purpose of this work is to determine the possibilities of an air-coupled ultrasonic technique to study this kind of new materials in order to develop an ultrasonic system useful for quality control for this industry. In particular, air-coupled ultrasonic spectroscopy is specially well suited to this kind of materials because of the fact that no coupling liquid and no direct contact with the sample is employed. A through transmission technique is employed and Fourier analysis is performed to obtain both magnitude and phase spectra of the transmission coefficient. Properties in the thickness direction as well as in the paper plane are investigated. Different paper grades (from 120 to 400 g/m2) provided by Terraskin have been studied. Very high attenuation coeficientes and very low propagation velocities (and hence elastic constant) are obtained, this can be explained by considering the large porosity of this material (about 50%) and the microstrucutre: solid grains in contact with a variable amount of polymeric resin partially filling the pore space. [ABSTRACT FROM AUTHOR]

The ongoing development and improvement of low-power wireless communication technologies enable many new applications to emerge on an Internet of Things (IoT). One of the main areas of healthcare research including new IoT programs to enhance both quality and access to healthcare and smart services; in this paper, we present the IoT hybrid health care monitoring system that integrates Radio-Frequency Identification (RFID) and Wireless networks technologies into a single platform that provides patient location, status, and tracking. Despite the great potential of such technologies to increase quality and experience and lower the cost of health care. The paper aims to address the complexities of RFID implementation in healthcare on patient safety through a literature review. Our primary findings indicate that the major obstacles to adoption are high adoption costs, protection and privacy-related concerns, and human security threats. [ABSTRACT FROM AUTHOR]

Graphene is one atom thick two dimensional material with unusual mechanical, electrical, thermal and optical properties. Graphene, on larger scale is produced through reduction of graphene oxide which in turn is synthesized by chemical oxidation of graphite. Generally large area graphene oxide paper can be easily fabricated by solution filtration process, spin casting method and Langmuir-Blodgett assembly. In present study graphene oxide was synthesized by modified Hummers method. Free standing graphene oxide paper (GOP) was developed by simple drying of graphene oxide suspended in water followed by reduction by thermal treatment to synthesize free standing conducting graphene paper (Thermally Reduced Graphene Paper, TRGP). Thermal reduction was carried out for 30, 60, 90 and 120min and samples referred as TRGP_30, TRGP_60, TRGP_90 and TRGP_120 respectively. XRD results show decrease in inter layer spacing (d002) from 0.87 nm to ∼0.35 nm after reduction of GO paper. This shows gradual removal of oxygen functionalities and adsorbed water during reduction. Meanwhile the size of sp2 domains of graphene also decrease as studied by Raman spectroscopy. SEM results also show change in morphology of thermally reduced graphene paper. The electrical conductivity of reduced graphene paper increases from 2.8 × 10-2 S/m for as such graphene oxide paper to 1.3 × 102 S/m for graphene paper. [ABSTRACT FROM AUTHOR]

The article discusses the digital transformation of media collections in the library. Research that illustrates how processing collection over media, obstacles faced by the Library Service of the Province of South Sumatra. The study used a qualitative descriptive method with the aim of getting a more detailed description of the processing of collections over media. Data collection techniques in the study were carried out by observation, documentation, and in-depth interviews with the head of the library, the head of conservation, the media transfer section, and librarians. The results of the study showed that the processing of media transfer collections consisted of three stages after the media transfer. The main obstacle in processing the transfer of media is the lack of human resources that are competent in the field of media transfer besides that, inadequate facilities due to lack of available budget. Digitizing the library may help library and the users to step toward the sustainable future, because digital libraries are the future. Digital technologies consistently help to reduce paper and energy waste and decrease the overall habit of students in copying pages from the printed books. [ABSTRACT FROM AUTHOR]

As mankind leads into a new age of modernization, security issues and measures have become exceedingly important. Considering an educational institute or workplace, keeping one's belongings safely with a minimal interface is the need of the hour. The traditional lock and key method of keeping personal items safe is clumsy and inconvenient. The recent developments in technology have provided innovative solutions to this problem. Gone are the days of the troublesome key and lock. Radio Frequency Identification (RFID), along with Internet-of-Things (IoT), is a secure, user-friendly and efficient method to safeguard things. This combination comes with advantages such as high security, simplicity, cost-effectiveness and 'misplace-proof' methodology. This paper proposes a Smart RFID-IoT based Locker system. The locker works on RFID authentication technology, which is unique to every identity card of the user. It is also enabled with Wi-Fi connectivity to facilitate continual status monitoring, user login-logoff data storage, and unauthorized access surveillance. [ABSTRACT FROM AUTHOR]

In various fields of computer science the word meaning has been explored. In various fields such as Smart Environment, Distributed Computing and Contextual Consciousness, context conscious devices are in popularity. Context Aware System is the new path towards the technology in Mobile Computing. This is a portable computing component where mobile apps can detect spatial data (e.g. User Place, Period of Day, nearby people, locations and user activities). Now in the era of Mobile Computing, recently we have seen the new developments in Apple iPhone-5 and Samsung Galaxy Note where they have application of Context aware System but it is not that what we call a "Killer App". Context conscious System is an old field but a rich field of research. In this paper, the difficulties and possible solutions are discussed which can serve as guidance to the developer or a researcher hoping to make an efficient Context Aware System a reality. [ABSTRACT FROM AUTHOR]