bluuebunny/crossref_metadata_2025 huggingface dataset:
Isospin effects on the chiral phase transition
Authors: Xu Shu-Sheng
Published: February 2021

We discuss the chiral and pion-superfluidity phase transitions at finite isospin chemical potential within the framework of Dyson–Schwinger equations. With the help of the quark scalar and pseudo-scalar condensates, which are widely accepted as order parameters of chiral and pion-superfluidity phase transitions respectively, we show that there is a second-order phase transition at isospin chemical potential μ

I
∼ m

π
. Thereafter, we investigate the isospin effects on the chiral phase transition and on the critical point as well as the critical end point (CEP). The chiral phase transition line splits into two lines at finite μ

I
, and the CEP splits into two CEPs as well.
Measurement of fission excitation function for 19F +
194, 196, 198Pt reactions
Authors: Singh Varinderjit , Behera B R , Kaur Maninder , Jhingan A , Kaur Rupinder , Sugathan P , Siwal Davinder , Goyal S , Singh K P , Pal Santanu , Saxena A , Kailas S
Published: February 2021

Experimental fission cross-sections are reported for the 19F + 194,196,198Pt reactions populating an isotopic chain of compound nuclei comprising both closed and non-closed shell nuclei. The fission cross-sections are obtained at near and above Coulomb barrier energies by measuring fission fragment angular distributions. The present work aims to estimate nuclear dissipation and find its isotopic and shell closure dependence from statistical model (SM) analysis of experimental data. Pre-scission neutron multiplicity data for the same systems is also included in the SM analysis. An updated version of SM is used in the present analysis, which includes shell corrections in level density and fission barrier as well as the effect of collective enhancement of level density and orientation effect of the compound nucleus along the symmetry axis. An isotopic dependence of the dissipation strength fitting the fission excitation functions is observed. The pre-scission neutron multiplicity, however, is underestimated by the SM.
On the structural and thermo-magnetic study of the magnetocaloric Heusler alloy Ni2Mn1-x
Cu
x
Ga0.8Al0.2
Authors: Silva L E L , Patiño J C , Gomes A M
Published: February 2021

Full Heusler alloys present martensitic transition and shape memory effect related phenomena and several technological applications can be envisaged. One promising area is the magnetocaloric effect (MCE) as the magnetic and structural transitions combine to produce a large isothermal entropy and adiabatic temperature change useful for heating and cooling applications. In this work, we study a Ni–(Mn, Cu)–(Ga, Al) Heusler alloy family which has a giant MCE when the chemical composition is fine-tuned to bring the temperature of the second-order magnetic transition close the first-order structural one. Our results show that, for a certain range of copper concentration, the samples show interesting physical properties captured by calorimetric, microscopy imaging, and magnetization measurements, leading to a high MCE with minimized hysteresis.
Metal cyclopropenylidene sandwich cluster and nanowire: structural, electronic, and magnetic properties
Authors: Liu Ying , Lv Haifeng , Wu Xiaojun
Published: February 2021

Organometallic sandwich clusters and nanowires can offer prototypes for molecular ferromagnet and nanoscale spintronic devices due to the strong coupling of local magnetic moments in the nanowires direction and experimental feasibility. Here, on the basis of first-principles calculations, we report TM

n
(c-C3H2)
n+1 (TM = Ti, Mn; n = 1–4) sandwich clusters and 1D [TM(c-C3H2)]∞ sandwich nanowires building from transitional metal and the smallest aromatic carbene of cyclopropenylidene (c-C3H2). Based on the results of lattice dynamic and thermodynamic studies, we show that the magnetic moment of Mn
n
(c-C3H2)
n+1 clusters increases linearly with the number of n, and 1D [Mn(c-C3H2)]∞ nanowire is a stable ferromagnetic semiconductor, which can be converted into half metal with carrier doping. In contrary, both Ti
n
(c-C3H2)
n+1 and 1D [Ti(c-C3H2)]∞ nanowire are nonmagnetic materials. This study reveals the potential application of the [TM(c-C3H2)]∞ nanowire in spintronics.
Side-chain engineering of copolymers based on benzotriazole (BTA) and dithieno[2,3-d;2′,3′-d′]benzo[1,2-b;4,5-b′]dithiophenes (DTBDT) enables a high PCE of 14.6%
Authors: Zhou Jialing , Zhang Bao , Du Mengzhen , Dai Tingting , Tang Ailing , Guo Qiang , Zhou Erjun
Published: February 2021

Dithieno[2,3-d;2′,3′-d′]benzo[1,2-b;4,5-b′]dithiophenes (DTBDT) is a kind of prospective candidate for constructing donor-π-acceptor (D-π-A) copolymer donors applied in organic solar cells but is restricted due to its relatively poor photovoltaic performance compared with benzo[1,2-b;4,5-b′]dithiophenes (BDT)-based analog. Herein, three conjugated polymers (PE51, PE52 and PE53)-based DTBDT and benzo[d][1,2,3]triazole (BTA) bearing different lengths of alkyl side chain were designed and synthesized. The change in alkyl chain length can obviously affect the energy level distribution, molecular stacking, miscibility and morphology with the non-fullerene acceptor of Y6. Polymer PE52 with a moderate alkyl chain realized the highest short-current density (J
SC) and fill factor (FF) of 25.36 mA cm−2 and 71.94%, respectively. Compared with BDT-based analog J52-Cl, the significantly enhanced crystallinity and intermolecular interaction of PE52 had effectively boosted the charge transport characteristic and optimized the surface morphology, thereby increasing the power conversion efficiency from 12.3% to an impressive 14.6%, which is the highest value among DTBDT-based and BTA-based polymers. Our results show that not only could high efficiency be achieved via using DTBDT as a D unit, but the length of the alkyl chain on BTA has a significant impact on the photovoltaic performance.
Generation of attosecond electron bunches and x-ray pulses from few-cycle femtosecond laser pulses
Authors: Ferri J , Horný V , Fülöp T
Published: February 2021

Laser-plasma electron accelerators can be used to produce high-intensity x-rays, as electrons accelerated in wakefields emit radiation due to betatron oscillations. Such x-ray sources inherit the features of the electron beam; sub-femtosecond electron bunches produce betatron sources of the same duration, which in turn allow probing matter on ultrashort time scales. In this paper we show, via Particle-in-Cell simulations, that attosecond electron bunches can be obtained using low-energy, ultra-short laser beams both in the self-injection and the controlled injection regimes at low plasma densities. However, only in the controlled regime does the electron injection lead to a stable, isolated attosecond electron bunch. Such ultrashort electron bunches are shown to emit attosecond x-ray bursts with high brilliance.
Automated android-based book order system
Authors: Ogundokun Roseline Oluwaseun , Oladele Rufus O. , Misra Sanjay , Ejegwa Grace Onyemowo , Jaglan Vivek
Published: February 2021

An ordering system is a collection of elaborate procedures used to handle and manage the ordering process of resources. An online book ordering system is a system that allows customers to purchase books online from a seller’s website. The objective of this study was to develop an android-based application for ordering books. The system consists of two main sub-systems: the administrator system and the user system. The plan, which was built using a private university in the North Central of Nigeria as a case study, is user-friendly, efficient, and robust. The study overcame the shortcomings in the existing book order systems. It provided an effective and efficient book order system for customers and the system as well as provided an environment where a customer was provided with a secure mode of operation and searching platform to access books online. The study developed an infrastructure accessible through the internet that can be used to order books and make payments for books bought and lastly the system created a more user-friendly interface.
A Product Authentication Scheme for Supply Chain system via Smart Contracts using Blockchain Technology and Facial Recognition
Authors: Srivatsa D , Aakash Nithin , Sahisnu S , Kumar Priyanka
Published: February 2021

The supply chain management industry is struggling with inadequate resources for efficient authenticity verification. Blockchain technology and smart contracts can overcome such conventional limitations to authenticate products in an easy, economical and secure manner. Decentralized and immutable blockchain systems allow product tracking to its origin.In this paper we have proposed and implemented a system for product authentication using blockchain technology based on ethereum platform by making use of smart contracts. We have analysed the existing centralized system and the need to shift from the existing centralized system to a decentralized blockchain based ledger technology. The use of blockchain technology in supply chain technology has reduced the complexity in product authentication by making the entire history of the product available from its production stage till it reaches the customer.
Pyropheophorbide-a derivatives as a dye compound for Dye-Sensitized Solar Cell (DSSC): Theoretical investigation
Authors: Hutasoit H P , Sudarlin
Published: February 2021

A pyropheophorbide-a (PPhe-a) derivatives were theoretically investigated using DFT/TD-DFT theory for DSSC application. Investigating the PPhe-a derivatives structure-properties relationships to understand prospects as a dye on DSSC. The geometry optimization using NWChem with 6-31G* basis set. The optimum HOMO-LUMO energy was calculated to be -4,855 eV for HOMO energy and -2,566 eV for LUMO energy (3PPhe-a). The optimum coupling constant was calculated to be 0,465 (4PPhe-a). The optimum ΔGinjectwas calculated to be -2,364 (3PPhe-a). The optimum LHE was calculated to be 0,577 (1PPhe-a). The UV-Vis absorption parameters and electron density parameters show the similarity of characters. The results showed that PPhe-a derivatives can be used as a dye on DSSC. The 3PPhe-a shows the optimum ability as a dye on DSSC.
Synthesis and Characterizations of Kubukatebu Particle Board from Cacao Peels and Bagasse
Authors: Hidayati Rahmi , Salamah Ummi , Suryani Rahmi , Sumiati Ruzita , Yetri Yuli
Published: February 2021

This research concerns on the manufacture of KUBUKATEBU particle board from a mixture of cacao peels and bagasse, with variations in the length of the bagasse fibers and the particle size of cacao peels in terms of their physical and thermal properties. The measured parameters were water content, density, water absorption, and thermal conductivity. This particle board was made with 5 variations of cacao peels powder, the ones that could get through the sifter namely 20, 40, 60, 80, and 100 mesh (149, 177, 250, 400, and 841 μm), and 5 variations of bagasse fiber length, namely: 1, 2, 3, 4, and 5 cm. The composition of cacao peels and bagasse fibers were 50:50 and 16% isocyanate adhesive content. The obtained physical properties of particle board variations in particle size of cacao peels were water content values 9.27-13.05%, densities 0.89-1.23 g/cm3, water absorption 11.11-52.28%, and properties thermal conductivity 7.26×10−3-9.0×10−3 W/m°C. As for the particle board variation of bagasse fiber length variation, the obtained values were 0.100-0.135% for water content, 0.9-1.30 g/cm3 for density, 0.2-0.6% for water absorption, and 6.5x10−3-8.5×10−3 W/m°C for thermal conductivity properties. Hence, the produced physical properties of KUBUKATEBU particle board had achieved the standards set by SNI 03-2105-2006, and JIS A 5908 (2003), on the contrary to the thermal conductivity properties.
Utilization of C-Cinnamal Calix[4] Resorcinarene as Adsorbent for Methanil Yellow
Authors: Etika S B , Nasra E
Published: February 2021

Rapid population growth causes many the environmental problems. One of them is the pollution of methanil yellow in the water. One of the effective methods in controlling water pollution caused by dyes is the adsorption method with a batch system. C-Cinnamal Calix [4] Resorsinarene (CCCR) compound is a compound synthesized from cinnamon oil waste that has great potential to be developed as adsorbent for dangerous dyes. The purpose of this study is to determine the maximum absorption capacity of CCCR towards methanil yellow using optimum conditions parameters (concentration and contact time). Absorption of methanil yellow in solution by C-Cinnamal Calix [4] resorcinarene (CCCR) compounds is carried out at the optimum pH of 3 with concentration variations of 20, 50, 100, 150 and 200 mg/L. The amount of methanil yellow reaches an absorption capacity of 1.83 mg/g at a concentration of 150 mg/L, while for the contact time is carried out at the optimum pH and concentration with variations in contact time of 30, 60, 90, 120, 150, and 180 minutes. The Results show that the optimum contact time was 150 minutes with an absorption capacity of 2.1375 mg/g.
The Role of Na2SiO3 Loading in the Synthesis of Fe3O4-Fe2O3@SiO2 Composite
Authors: Aini S , Azra F , Rahma N , Cahyadi A
Published: February 2021

Mesoporous silica on the surface of nanoparticles’ magnetic Fe3O4-Fe2O3 has been synthesized in one pot reaction method by using Sijunjung iron sand and Na2SiO3 as raw materials. The influence of Na2SiO3 mole as raw materials on the existence of silica pore size on the surface of Fe3O4-Fe2O3 composite product has been studied. The product were characterized by X-ray diffraction. The results showed that mesoporous silica start to form on the surface of the Fe3O4-Fe2O3 composite when Na2SiO3 was used 8 times moles of iron sand. The increasing of Na2SiO3 mole lead to increase of OH−concentration and transformed some Fe3O4 into Fe2O3
Synthesis of the Halal Fragrance Compound Menthyl p- Anisate from Fennel Oil
Authors: Prabawati Susy Yunita , Yahdiyani Atika , Saputra Yoga
Published: February 2021

Menthyl p-anisate is an ester compound which can be used as chemical base of halal fragrance. Synthesis of menthyl p-anisate from Fennel Oil has been conducted. p-an1sate acid was derivative of anethol from fennel oil that undergo oxidation process by KMnO4 at 40°C for 2 hours. Esterification with menthol carried out at 40°C for 7 hours. Identification and determination of structure compound of the product was analysed by spectroscopic methods (FTIR and GC-MS). Organoleptic evaluation of the fragrance was carried out by 20 semi-trained panellists. The result showed that identification of menthyl p-anisate using FTIR indicated the presence of C-O ester at 1223,41 cm−1 and 1180,44 cm−1; and C = O carbonyl at 1689.64 cm−1. However, methyl p-anisate was different from menthol which is shown by mass spectra with the absence of m/z 71 and m/z 57 peak. Organoleptic evaluation suggested that the menthyl p-anisate compound is in range of “fragrant” with score 4,90, “very sharp fragrant” with score 5,90, and acceptance in range of “preferred” with score 5,00. Thus, follow the conclusion that the compound exerted potent ability as chemical component in halal fragrant.
Biomass Waste of Cocoa Skin For Basic Activated Carbon as Source of Eco-Friendly Energy Storage
Authors: Yuli Y , Eka S , Rakiman  , Yazmendra R
Published: February 2021

Increased cocoa production is in line with the increasing biomass waste from cocoa skin. One way to reduce the buildup of biomass waste is to change the skin of cocoa into activated carbon. The purpose of this research is to utilize cocoa skin into activated carbon for supercapacitor electrodes with a combination of chemical and physical activation methods. Pre-carbonization with a temperature of 250°C for 2.5 hours, chemical activation with KOH activators 0.3 M and 0.4 M, with a physical activation temperature of 700°C. Characterization using FTIR, Thermal Gravimetry Analysis (TGA), Cyclic Voltammetry (CV), Scanning Electron Microscopy (SEM), and X-ray Energy Dispersion (EDX). The results showed that the density of activated carbon increased and the specific capacitance decreased with an increase in KOH concentration from 0.3 M to 0.4 M, with an activated carbon content of 87.87%. The density value is 0.850gr/cm3 and the specific capacitance is 90.2 F / gr at a concentration of 0.3 M, while at a concentration of 0.4 M the density value is 0.802 gr/cm3 with the specific capacitance of 140.2 F / gr. Utilization of cocoa skin waste into activated carbon with a combination of chemical and physical activation methods can be used as an energy storage to overcome the current energy crisis.
Training of Scientific Literation and Self Efficacy Students Using Scientific Critical Thinking (SCT) Models
Authors: Rusmansyah  , Rahman M. Isra’i , Almubarakand  , Masniah
Published: February 2021

The ability of scientific literacy and self-efficacy becomes an essential part of learning chemistry in the framework of preparing students to enter the industrial era 4.0 and the era of society 5.0. The Scientific Critical Thinking (SCT) model is one of the models to practice student’s scientific literacy skills and self-efficacy in learning the buffer solution concept. The research conducted during COVID 19, so learning carried out online using the Google Classroom and Zoom Meeting applications. The research design uses the type of pre-experiment with one group pretest-posttest design. The sample of this study were students of class XI MIPA 3 of SMAN 6 Banjarmasin in 2019/2020. The independent variable is the SCT, and the dependent variable is the ability of scientific literacy and self-efficacy. Data collection uses test and non-test techniques. Data analysis techniques used descriptive and inferential analysis techniques. The results of this study indicate (1) there is a significant difference in scientific literacy ability between the results of the pretest and posttest with tcount> ttable ie 13.2> 2, 00, (2) there is a significant difference in students’ self efficacy with tcount  2, 00, (3) students respond with criteria both for learning with the SCT model. Thus, the Scientific Critical Thinking model can train the scientific literacy ability and self-efficacy of students of XI MIPA 3 students at SMAN 6 Banjarmasin.
Strengthening Buffer Solution Learning Activities with Numbered Heads Together Models Equipped with a Combined Hand Out –Augmented Reality
Authors: Masykuri Mohammad , Marwan  , Susilowati Endang
Published: February 2021

This study aims to determine the comparison of the effect between the Numbered Heads Together (NHT) model equipped with Handout-AR and NHT model equipped with Microsoft PowerPoint on student learning activities on the buffer solution. The research sample was determined using the Cluster Random Sampling technique. The study data were obtained using documentation and observation techniques. The documentation technique was used to obtain data on the students’ midterm test results. The observation technique was used to obtain the data on the scores of student learning activities. The study data were analyzed using the Mann Whitney test. The results show that the application of the NHT model equipped with Handout-AR has a better effect on student learning activities on buffer solution material than the application of the NHT model equipped with Microsoft PowerPoint. These results are supported by the results of the Mann Whitney test and the average score of student learning activities from the two experimental classes. The data analysis using the Mann Whitney test produces asymp. Sig. 2-tailed value (0.000) greater than the significance level/a (0.050). The NHT/Handout-AR class has an average score of learning activities (87.6) which is greater than the NHT/Microsoft PowerPoint class (68.4).
Biology teachers used Learning Management System (LMS) for collaborative learning
Authors: Almareta Ria , Paidi
Published: February 2021

Learning Management System (LMS) provides a new perspective in the education system in the 2nd century. The use of LMS by biology teachers is dominated by developing countries, as many as 67% of teachers have implemented LMS in biology learning. LMS can be used by biology teachers to conduct collaborative and conceptual learning through existing media in online-based learning management system. Moodle is a Learning Management System (LMS) with the most popular and most used system in the world, because of its flexibility, open-source capabilities, and a learning management system that is a free download, and can load 1000 subjects in this system. This literature study aims to illustrate the use of LMS to support collaborative learning in biology and science subjects. This research methodology using review and meta-analysis, there are interactive features that can support collaboration between students and teachers or between students.
The correlation between grade point average with UKMPPD’s result in faculty medicine of university of Palangka Raya
Authors: Alexandra F D , Fretehernety A , Augustina I
Published: February 2021

The Grade Point Average (GPA) as a measure of student performance in implementing the curriculum is expected to be correlated with the UKMPPD results to produce competent doctors with national standards. However, this is not in line with some who do not pass the UKMPPD at the Faculty of Medicine, University of Palangka Raya. This problem raises the question, can a medical student’s GPA ensure a fresh graduate doctor’s competency to pass UKMPPD? The research design was descriptive-analytic, with a cross-sectional design consisting of 132 students participating in UKMPPD as the first participants from May 2016 to November 2019. The data obtained were the results of preclinical and clinical GPA and UKMPPD. Data analysis using Pearson correlation test and Mann Whitney test. Statistical analysis showed that there was a significant relationship (p <0.001) between the preclinic GPA and the results of CBT (r = 0.642), OSCE (r = 0.329), and UKMPPD. Clinic GPA showed significant correlation (p <0.001) with CBT (r = 0.429), and UKMPD results (p = 0.001), but had no significant correlation (p = 0.167) with OSCE. These results indicate that the GPA of Preclinic and Clinic scores can be used as an indicator of learning outcomes to determine cognitive test results.
Research on the Finishing of Wearing characteristics of Organic Cotton Men’s Shirt Fabric
Authors: Li Zhilin , Wang Jianping , Liuying  , Chen Xiaona
Published: February 2021

In order to improve the wearing characters of organic cotton men’s shirt fabrics and explore the effective finishing path, this article combining with the strength reagent 501, explored the differences of the wearing characters of 20S organic cotton men’s shirt fabric after different dipping times and drying temperature, used the fuzzy comprehensive evaluation analysis method to evaluate the wearing characters comprehensively, and formulated three finishing technical path to improve the wearing characteristics of organic cotton men’s shirt fabric according the comprehensive evaluation result. The process provides a reference about development of organic cotton products for the enterprise in future and study of organic cotton for the experts and scholars.
Design and ergonomic evaluation of nursing clothing for disabled people with one side of body
Authors: Wei Yuhui , Su Zhaowei , Wang Zongqian , Li Changlong , Yuan Huifen
Published: February 2021

In order to explore the relationship between the degree of nursing difficulty and the opening and closing modes of clothing, three style of clothing with different opening and closing modes were designed and its ergonomic performance was intensively investigated with help of objective experimental data and subjective comfort evaluation. Experimental results showed that the opening and closing modes of nursing clothing could significantly affect the difficulty of nursing. And found the newly designed clothing (NO.2 and NO.3) had better ergonomic performance in clothing style and structure than the in-service one (NO.1*). In addition, fuzzy comprehensive evaluation method was applicable to ergonomic evaluation of clothing. Therefore, this finding is not only helpful to understand the effect of the opening and closing modes of clothing on nursing difficulty, but also provided reference for consumers in their decision making for buying clothes for disabled people with one side of their body.
Development and evaluation methods of smart wearable clothing
Authors: Xie D D
Published: February 2021

With the development of technology and the increase in customer demand, smart clothing has become an indispensable part of the clothing field. Smart clothing is also gradually being applied to many aspects such as medical monitoring, daily protection, entertainment and sports. Based on the original wearing needs, sensors are integrated into the clothing to meet the miniaturization and convenience of electronic products. As a result, it has an impact on the comfort and aesthetics of clothing materials. During the research and development process, hardware devices such as sensors were added to the fabric, resulting in changes in the original structure and design of the clothing itself. There is no complete set of standards for smart clothing. This article starts with the development of smart clothing, classifies it, and sorts out some evaluation methods of smart clothing.
Evaluation of the comfort of sportswear
Authors: Xiaofei Wang
Published: February 2021

Sportswear comfort is a very important content in the evaluation of sportswear design and development. By reading relevant research literature at home and abroad, it is concluded that the commonly used evaluation methods in the study of sportswear comfort are subjective feeling evaluation method, objective evaluation method and subjective and objective comprehensive evaluation method, etc., and the implementation requirements, advantages and disadvantages of different evaluation methods are analyzed. Research shows that the actual performance of sportswear in survey research, is usually subjective feelings and objective evaluation method is used in combination, in the experimental study on the design to improve targeting, as far as possible to improve the effectiveness of the test results, comprehensive analysis of the different test results at the same time, to achieve a comprehensive, scientific, appropriate and accurate evaluation conclusion.
A summary of the research status and development trends of protective clothing for the elderly
Authors: Wei Wang
Published: February 2021

In order to understand the current status of the development of elderly fall-preventive clothing, focusing on the current application of energy-absorbing cushioning materials, protective equipment and wearable clothing in the field of fall-protective clothing, this paper summarizes the main domestic and foreign research on elderly fall-protective clothing The results, specifically analyzed the advantages and disadvantages of energy-absorbing cushioning materials, protective equipment and wearable clothing in its application. It points out the precautions for the development of anti-fall clothing for the elderly, and draws the research and development trend of anti-fall clothing, and provides functional clothing for the elderly in daily life that is healthy, comfortable and self-help convenient. It is in line with the current “elderly-oriented” design The concept provides guiding suggestions for the development of anti-fall clothing for the elderly.
The Application of Yangliuqing Woodcut New Year Paintings Based on Image Extraction Technology in Clothing Design
Authors: Liu M L , Xu J , Wang X Y , Zheng F , Qiu Y
Published: February 2021

As a traditional Chinese folk art, Yangliuqing Woodcut New Year (YWNY) paintings with unique artistic symbols and rich artistic values have formed varied artistic styles since century. The purpose of this study is to explore the innovative application of traditional folk art combined with other technologies in the field of fashion and art design. Through literature research and object investigation methods, this paper analyses the subject and artistic characteristics of YWNY paintings, classifies the paintings and creates an image bank. Using the image extraction technology, we extract the characteristic elements with cultural symbols and representative colours and construct the corresponding elements resource libraries. Based on the modern design aesthetic and clothing craft design means, YWNY paintings are flexibly applied to fashion design and other design fields. Fashion trends in combination with the elements in YWNY paintings create works that have regional characteristics, which achieve the creative transformation of Tianjin folk art in fashion clothing design.
Research on thermal radiation reflection coating of wearable air conditioner
Authors: Yang Hong , JiaYin Liu
Published: February 2021

As a special wearable system, wearable air conditioner can enhance the human body’s ability to adapt to the environment. In the actual study, the heat dissipation unit of the wearable air conditioner is prone to radiation interference from nearby heat sources, thus affecting the refrigeration efficiency and resulting in power attenuation due to the adverse heat dissipation of the system itself. In this paper, kirchhoff’s thermodynamic principle is applied to study the microphysical state of black, white and mirror, and a theory of coating mode conduction or obstruction of heat radiation propagation is provided. As a kind of extension and enhancement of heat dissipation under non-Fourier’s Law in practical application, the cooling efficiency of wearable air conditioner can be improved to the greatest extent.
The Effects of Multiple Flame Exposures on Thermal Shrinkage and Thermal Protective Performance of Fabrics used in Firefighter Clothing
Authors: Deng Meng , Wang Ying , Wang Yunyi
Published: February 2021

In firefighting situations, firefighters will encounter multiple flame exposures during go through the fireground several times. In this study, the effects of multiple flame exposures on thermal shrinkage and thermal protective performance of three fabrics used in firefighting clothing were investigated. The fabric surface morphology after flame exposure was obtained by a handy scanner, and further processed in ArcGis software. The thermal shrinkage of fabrics was characterized by ten shrinkage parameters and then quantified by using principal component analysis. The results showed that flame exposure frequency had influence on the thermal shrinkage of fabrics. As compared to several short-duration exposures, a long-duration continuous exposure resulted greater thermal shrinkage. The correlation analysis showed that there was no significant correlation between thermal shrinkage of the fabric and its thermal protective performance. The findings in this study indicated that the effects of multiple flame exposures on thermal shrinkage and thermal protective performance of firefighters clothing should be considered during clothing design and performance prediction.
Study on Comfortability Design of Heart Rate Monitoring Vest for Elderly Women
Authors: Shi Wang , Zhi Xu
Published: February 2021

In order to promote healthy aging and care for the heart health of elderly women, the authors carry out a design for the heart rate monitoring vest sold in the market for its “suitability for the elderly” and “comfortability”. Based on the requirement of flexible heart rate monitoring, this paper analyzes the functional requirements of physiological function and morphological changes of elderly women, selects eight kinds of high-elastic nylon and spandex interwoven fabrics with different composition ratios on the market to test the two basic properties—tensile property and thermo-wet comfort property, and optimizes the fabric partition design of elderly heart rate monitoring vests by referring to the test results of fabric comfortability. To a certain extent, the study improves the comfortability and stability of heart rate monitoring vest of elderly women, and provides multiple choices for the maintenance of heart health of elderly women.
Waterproof and Moisture permeable Nanofibrous Membranes with Cross-Linked Structure
Authors: Du Xuanxuan , Xin Binjie
Published: February 2021

Functional flexible membranes with superior water repellency and moisture permeability, which prevent water penetration and allow rapid passage of water vapor, offer new possibilities for a wide range of applications in various fields. A new type of functional nano-fiber membrane can be prepared by a facile electrospinning method, thermal post-treatment and chemical crosslinking, which can provide excellent mechanical properties. In this study, low melting point polyvinyl-butyral (PVB) elastomers were incorporated into polyvinylidene fluoride (PVDF) to change the adhesion between the membrane bonding network structure and the fibers to impart durable and strong mechanical properties to the membrane. The effects of PVDF/PVB concentration on the waterproof and breathable properties were investigated by systematically tabulating the morphology, contact angle, water vapor transmission rate (WVTR), and fracture length of PVDF/PVB. The results showed that the prepared nanofiber membrane could maintain high hydrostatic pressure (85.15 kPa) and high water vapor transmission rate (10.28 kg m-2d-1), and at the same time, the membrane exhibited excellent tensile stress (13.07 MPa), indicating its wide application in separation process and protective clothing.
Application of graphene in electrical resistance electromagnetic shielding fabric
Authors: Miaomiao Jiang , Ying Ding , Lihui Xu , Haitao Liu , Junjie Zhu , Qian Zhao
Published: February 2021

Graphene is a kind of material formed by Sp2 hybridization of carbon atoms, which has been widely used in various scientific research fields in recent years. In this paper, the mechanism of electromagnetic shielding on fabrics and the recent development of resistance type electromagnetic shielding materials are introduced. The effects of graphene and metal particle composites, graphene and high conductivity polymer composites, carbon nanotubes and high conductivity polymer composites on fabrics are briefly described. The optimization of electromagnetic shielding effectiveness and the future development of shielding materials is prospected.
Preparation and Characterization of Polypyrrole-coated Wool Fabric for High Electrical Conductivity
Authors: Jia Yu , Xin Binjie
Published: February 2021

In recent years, flexible electronic devices have attracted people’s attention. Textiles have been used in the preparation of flexible electronic devices because of their flexibility, but how to improve their conductivity has become the key to expand their application. In this study, the wool fabric with high conductivity was prepared by plasma treatment and in-situ polymerization methods. In this paper, high conductivity wool fabric was prepared by plasma sputtering and in-situ polymerization. Firstly, the wool was descaled by plasma, and then the wool fabric was modified by in-situ polymerization of polypyrrole (PPy). The effect of polypyrrole treatment time on the high conductivity composite fabric was discussed, and a series of characterization were carried out. The results show that the resistance of PPy coated wool fabric with plasma sputtering power of 200W and polypyrrole treatment time of 1200 s is low, and the average square resistance is 67.32 Ω / sq.
Realization of clothing image contour extraction and collar segmentation
Authors: Zhang Ling , Xu Zengbo , Zhang Yanhong
Published: February 2021

With the change of personalized ideas, the clothing and apparel industry is developing towards small batches and multiple varieties. Looking for fast and efficient apparel image processing and recognition is the most urgent problem to be solved by apparel companies. The establishment of a collar style sample library is the prerequisite for apparel image processing and recognition research. Apparel image preprocessing is the basis of research. This article takes the clothing style map as the research object, establishes a collar style sample library, and takes a round neck T-shirt image as an example, which contains 8 types of collars commonly used in clothing, and each collar type corresponds to 60 images. The advantages and disadvantages of commonly used image graying, sharpening, edge detection, morphological processing, and image segmentation processing methods are compared and analyzed. Corresponding image preprocessing schemes have been formulated to provide new ideas for automatic pattern recognition, software development and application.
Analysis of limiting fators of RGL citrus fruit productivity (study case in Pal VII Village, Bermani Ulu Raya Subdistrict, Rejang Lebong District)
Authors: Siagian I C , Nurmegawati  , Puspitasari M , Miswarti  , Dinata K , Mikasari W , Hartono R , Yuliasari S , Sastro Y
Published: February 2021

Environmental factors, especially climate, soil and pest attack, are limiting factors in citrus production. The purpose of this study was to determine the limiting factors on RGL citrus productivity. This research was carried out in 2019 in Pal VII Village, Bermani Ulu Raya District, Rejang Lebong Regency, Bengkulu Province with seven farmers at the research location. Data was collected from primary and secondary data consist of 10 years climate data, soil characteristics and citrus pest and diseases identification, which are then analyzed descriptively. The results showed that the productivity of RGL citrus in the research location was influenced by high rainfall during the fruiting period. Another limiting factor is the relatively low soil nutrient content because farmers generally do not apply fertilization technology that based on crop needs. Pests and diseases that had been potential reduced the productivity and quality of citrus fruits were fruit borers, fruit flies and scurvy, and climate factors also influenced the quality.
Differences in Andisols properties as affected by horticulture land use and pine forest in Lembang Sub District, West Java
Authors: Hati D P , Gani R A , Mulyani A , Husnain
Published: February 2021

Andisols have different characteristics depending on the use and management of the soil. This study aimed to determine the different characteristics of Andisols at horticulture land use and pine forest. Three soil profiles in Lembang, West Java, have been identified to represent land use differences and 23 soil samples were selected for analysis of the soil chemical and physical properties. The results showed that the three profiles have very thick solum (≥150 cm), bulk density of 0.40 to 0.68 g cm−3, pH NaF >10, very high P retention (>90%) with acid to slightly acid soil reaction. organic C was very high in the surface horizon and decreased irregularly with soil depth. The upper layer of soil planted with vegetables has a higher content of total K and available P compared to the soil under pine forests. The soil was classified as Typic Hapludands or Umbric Andosols. High P retention and low pH are some of the limiting factors in agricultural business, requiring soil cultivation and application of organic matter to increase soil pH and reduce P retention.
The adaptability of rice varieties on tidal swampland in South Kalimantan
Authors: Koesrini  , Nurzakiah S , Mayasari V , Rina Y
Published: February 2021

Swampland was marginal land with considerable potential for rice farming. The key solution to overcome swampland constraints is nutrient, water, and plant management as well as the use of adaptive rice varieties. Inpara (Inbred swamp rice) is a variety released for adaptation to swampland. This research aimed to evaluate the adaptability of Inpara varieties in tidal swampland. The research was conducted at potential acid sulphate soil (Karang Bunga village, Barito Kuala regency) and actual acid sulphate soil (Barambai Kolam Kanan village, Barito Kuala regency). Randomized block design with three replications was applied to examine rice varieties. Data were collected and analyzed by variance analysis, if it is significant it will be tested with DMRT test. The result showed that there was a variation yield and adaptation (Fe score) among varieties tested. Some of the superior adaptive rice varieties were Inpara 1, Inpara 3, Inpara 4, Inpara 6, and Inpara 9 in tidal swampland. The average yield in potential acid sulphate soil was 37.9% higher than that of actual acid sulphate soil. The implication of this research was the variety of Inpara 1, Inpara 3, Inpara 4, Inpara 6, and Inpara 9 can be used as substitute varieties in the tidal swampland.
Seed treatment using biofertilizer to improve plant growth and yield performances of upland rice cultivars under various planting densities
Authors: Saryoko A , Kusumawati S , Pohan A
Published: February 2021

Producing upland rice through the use of high yielding cultivars and better agronomical practices is a promising way to improve rice production in Indonesia. The objectives of the study were to evaluate the effect of seed treatment on growth and yield of two upland rice cultivars under two planting densities, and to identify its related traits. A field experiment was conducted in Banten Province, Indonesia. Two rice cultivars, Inpago 8 and Inpago 9 were treated with biofertilizer and were arranged into double-row system with the density of 21 plants m−2 or 33 plants m−2. Research results showed that seed treatment significantly improved plant growth and seed yield for both cultivars due to greater panicle number and seed number per panicle. Biofertilizer contributed to a greater amount of total biomass as well as harvest index (HI). Increasing planting density from 21 to 33 plants per m−2 improved panicle number that affected seed yield increase. The Inpago 9 performed superior in seed yield as compared to Inpago 8 due to better seed number per panicle and HI. High yielding upland rice cultivars in combination with biofertilizer and appropriate planting density would be an approach to improve upland rice production.
Dynamic of groundwater table, peat subsidence and carbon emission impacted from deforestation in tropical peatland, Riau, Indonesia
Authors: Basuki I , Budiman A , Netzer M , Safitri R , Maulana R , Nusirhan T S E , Syamsir  , Bernal B
Published: February 2021

Drainage canals have triggered peat subsidence and lowered groundwater table, enabling wildfires and peat degradation in Riau, Indonesia. This study examines the changes on groundwater table, peat subsidence rate, and carbon emission in response to deforestation and land cover changes. We established 31 study sites in some land cover types (i.e., oil palm plantation, acacia regrowth and shrub), with 124 monitoring shallow wells and 31 subsidence poles that were setup and have been monitored for 18 months. Groundwater table of all plots averaged -55 cm in Dosan Village, higher than that in Dayun Village (-66 cm). In accordance, peat had subsided in faster rate (8.4 cm year−1) in Dayun Village than that in Dosan (3.3 cm year−1). This average annual groundwater table has resulted in carbon emissions from peat decomposition up to 66 t CO2eq ha−1 year−1. On the other hand, canal discharge of these sites ranged from 2 to 73 dm3 s−1, averaging 26 dm3 s−1. These results evidence that land uses converted from peat forest, and the dimension of canal control the decrease in groundwater table, the pace of peat subsidence, and rate of carbon emissions in tropical peatlands.
Controlling maize weevil in corn plants by improving cultivation technology and postharvest handling
Authors: Arrahman A , Saenong M S
Published: February 2021

The maize weevil is corn pests that reduce production and damages the storage quality. Therefore, pest management should simultaneously be carried out by applying all available technologies. This pest can damage up to 30% of plant productivity, not including the value of losses due to decreased quality of hazardous materials for health and safety, both as feed and feed. Aflatoxin contamination for example, can be dangerous if consumed. This paper is a desk study that reviews some literature, attempts to describe the role of cultivation technology improvement, crop protection, optimum watering, phosphate fertilization, the technology of postharvest handling, management of water content of corn kernels, sanitation, cleanliness, warehouse management, pesticide use, and fumigation in reducing the scale of damage and increasing the added value of production, and improving the quality of stored materials so that they are safe to use, both as food and feed. The utilization of cultivation technology management and good postharvest handling will have an impact on controlling and reducing the damage quality of storage materials and increasing the safe product quality for both food and feed needs as well.
The use of green super rice varieties and harvest waste in sustainable rice farming in tidal lands
Authors: Susilawati  , Syamsuddin  , Qomariah R
Published: February 2021

The practice of increasing rice productivity in tidal swamp lands is guided by synergistic cultivation through integrated crop management (ICM). The objective of the study was to improve technology through the use of crop residue and increase rice productivity in tidal land. The superior varieties from Green Super Rice (GSR) group used was Inpari 42 and 43, combined with straw left in the land, site-specific fertilization, and dolomite application. The study was conducted from April 2017 to September 2018 in the tidal land of Belanti Siam Village. The method of participatory on farm and farmers activities involves 10 farmers on an area of 10 ha. The results proved that the application of 5 t ha−1 of straw waste remains in the land after harvesting, and the addition of 0.5 to 1 t ha−1, dolomite, were able to increase soil pH from 4.0 to 4.2. Application of the straw waste, rice productivity increased by 32% (4.8 t ha−1) after the first application and further 21% (5.1 t ha−1) after the second application for the Inpari 42 variety. The productivity levels of Inpari 43 variety increased 112% (4.8 t ha−1) and 16% (5.6 t ha−1) after the first and the second applications, respectively.
Financial benefits of using soil test kit of PUTS for determining dosage of lowland rice fertilizer
Authors: Irawan  , Kasno A , Nurjaya
Published: February 2021

Determination of a balanced fertilizer dosage on lowland rice can be done as quickly as possible using a paddy soil test kit (PUTS) which has been developed by Indonesian Soil Research Institute (ISRI), Agency for Agricultural Research and Development. This study aims to convince farmers on the financial benefits of using PUTS in determining balanced fertilizer dosage for lowland rice. The study was conducted in dry season 2018 in technical irrigation paddy fields in collaboration with farmers’ group members of Cibentar and Mulya Sanepa, Buahdua Sub-district, Sumedang Regency, West Java. The results showed that fertilizer dosage applied by farmers was higher than PUTS dosage, especially for NPK Phonska 15:15:15 fertilizer. On the other hand, the productivity of Inpari 33 rice with PUTS fertilizer dosage was higher than the farmers’dosage. Additional net benefits of using PUTS to determine fertilizer dosage of lowland rice was IDR 4,028,888 ha−1 in Mulya Sanepa and IDR 2,160,506 ha−1 in Cibentar farmers’ group, respectively. Similar study still needs to be conducted on various paddy field ecosystems to further convince farmers. However, it is recommended that the use of PUTS needs to be more promoted nationally to increase fertilizer use efficiency, rice productivity and farmer’s income.