bluuebunny/crossref_metadata_2025 huggingface dataset:
A Review on Investigation of PV Solar Panel Surface Defects and MPPT
Techniques
Authors: Damodaran Manimegalai , Subarnan Gayathri Monicka , Madhu Karthikeyan
Published: June 2022

The lifetime of PV modules is reduced due to a variety of degradation modes. Failure
modes that contribute significantly to PV module output power losses include snail trails, hotspots,
micro cracks, bubbles or delamination, and dust accumulation. The correlations between these phenomena, like those between corrosive environment and potential-induced breakdown, are not well
understood. As a result, in this review, we will try to explain the relationship between snail trails,
hotspots, microcracks, bubbles or delamination, and dust accumulation on photovoltaic module
components in order to ensure the PV modules' reliability. This paper in the Photovoltaic literature
gives an overview of several Maximum Point Tracking (MPPT) techniques that have been recently
designed, simulated and/or experimentally validated. The main objective of every MPPT technology
is to maximize the output of a photovoltaic array with shade or unshade conditions. The characteristics presented in this paper are unique, and they provide researchers with a starting point for choosing and implementing an appropriate MPPT technique.
KARAKTERISASI PENGECORAN POROS BERULIR (SCREW) DENGAN VARIABEL PADUAN UNSUR TITANIUM BORON DAN MAGNESIUM
Authors: Wisnujati Andika , Yusuf Mirza , Hudiatma Azhar
Published: June 2022

Aluminum is a non-ferrous metal that is widely used in everyday life, both on a large and small industrial scale as well as a household scale. In this research, used diesel motor piston material for casting screw. The addition of 0.1%, 0.3% Titanium Boron (Ti-B) and 0.1%, 0.3% Magnesium (Mg) for screw making by casting is expected to improve the physical and mechanical properties of the material. Tests carried out in this research are to wear testing and microstructure. The analysis of the results of this wear test shows that the aluminum alloy for making screws with the addition of 0.1% Titanium-Boron (TiB) and 0.1% Magnesium (Mg) has a better wear resistance, which is 1.154 mm² / kg compared to the addition of the element 0.3% Titanium-Boron (TiB) and 0.3% Magnesium (Mg) and without the addition of any elements which have wear resistance values of 1.252 mm² / kg and 1.596 mm² / kg, respectively. Microstructure testing shows the grain structure in aluminum alloy from casting results with the addition of Ti-B and Mg elements getting smaller and denser. This proves that the more elements of Ti-B and Mg added to the casting of aluminum alloys, the smaller the structure of the grain will be and will affect the mechanical properties of the screw.
Development of innovation house to improve the competence of developer teachers
Authors: Murdani Eka , Widodo Ari , Suhandi Andi
Published: June 2022

The Innovation House program has been developed with the validation criteria of 'Very Good' based on expert judgment. The Innovation House was developed using the ADDIE method (Analysis, Design, Develop, Implement and Evaluate). The vision of the Innovation House is to prepare teacher developers as reflectors, problem solvers, and decision-makers in science learning. The Innovation House aims to improve science teachers' competence in developing curriculum, especially lesson planning (objectives, steps, and assessments). On average, 80% of the lesson plans made by teachers were by the content and constructs of the lesson plans, while at the beginning of the program, the average suitability of new content and constructs was about 56%, with an N-gain score of 0.5 or a moderate increase category. Based on the average assessment of RPP content and constructs, the Rumah Innovation Program effectively improves teacher competence in making Innovative RPP by increasing the aspects of reflection, problem-solving and decision making. The teacher participants' response during the programs was 'imposing' and gave a 'positive response' based on the attitude scale instrument.
Developing multimedia learning on concept Arthropoda to increase students self-regulation and motivation
Authors: Endris Wahyu Maulana , Suhartini Suhartini
Published: June 2022

This study aims to: (1) produce learning multimedia, (2) determine the feasibility of learning multimedia, and (3) determine the effectiveness of multimedia learning in increasing independence, motivation, and learning outcomes of biology subjects. This development research uses the ADDIE model, namely the analysis, design, development, implementation, and evaluation stages. Data collection techniques in the study used observation sheets, interview guides, learning style questionnaires, cognitive tests, learning independence questionnaires, learning motivation questionnaires, and experience questionnaires using media. Quantitative data on learning outcomes were obtained and then analyzed using paired t-tests. The results showed that: (1) the product was learning multimedia valid and reliable, (2) multimedia learning on Arthropod material is suitable for use in biology learning; and (3) learning using multimedia is effective in increasing independence, motivation, and learning outcomes of biology students.
Особенности перемагничивания двухслойной пленочной структуры ЖИГ/FeNi
Authors: Свалов А.В. , Иванов В.Е. , Лепаловский В.Н. , Фещенко А.А. , Горьковенко А.Н. , Макарочкин И.А. , Васьковский В.О. , Курляндская Г.В.
Published: June 2022

In this work, the results of magneto-optical and magnetometric measurements carried out on YIG/FeNi film two-layer structures are presented. YIG films were grown by liquid phase epitaxy, and FeNi films were deposited using magnetron sputtering. It has been established that in the YIG/FeNi system the interlayer coupling is mainly due to the magnetostatic interaction.
Гистерезис тензора сопротивления в полителлуридах редкоземельных металлов
Authors: Григорьев П.Д. , Синченко А.А. , Могилюк Т.И. , Воробьев П.А. , Акпаров Д. , Алисултанов З.З. , Дюгаев А.М.
Published: June 2022

Possible reasons for the temperature hysteresis of the Hall and diagonal components of resistivity tensor in tritellurides and tetratellurides of rare-earth metals, respectively, are analyzed. The width of this hysteresis exceeds 100 K in both families. This hysteresis is related to the charge density wave (CDW), but its detailed nature is still being discussed. It is known that it cannot be explained by a temperature variation in the CDW wave vector. In this paper, we discuss various interpretations of the observed hysteresis, present new experimental data showing a strong dependence of the hysteresis value on the temperature range, and propose new experiments (or a detailed analysis of unpublished data from existing ARPES measurements) that can substantiate or refute the proposed explanations for this unusual effect.
Особенности синтеза, структура, магнитометрия и ЯМР-спектроскопия нанопроволок различных типов
Authors: Загорский Д.Л. , Долуденко И.М. , Хайбуллин Р.И. , Чупраков С.А. , Гиппиус А.А. , Журенко С.В. , Ткачёв А.В. , Черкасов Д.А. , Жигалина О.М. , Хмеленин Д.Н. , Каневский В.М. , Муслимов А.Э. , Панов Д.В. , Блинов И.В.
Published: June 2022

Исследованы различные типы нанопроволок, полученных методом матричного синтеза --- гомогенные (из железа) и гетерогенные (слоевые). Разработана и описана методика получения массивов слоевых нанопроволок, с чередующимися тонкими слоями магнитных и немагнитных металлов (Co/Cu, Ni/Cu). Методами микроскопии (СЭМ и ПЭМ с элементным анализом) изучена топография получаемых структур, диаметры нанопроволок и толщины отдельных слоев, особенности межслоевых интерфейсов. Предложены способы синтеза нанопроволок с тонкими слоями и четкими границами --- разбавление электролита, использование электрода сравнения, контроль протекшего заряда. Методами магнитометрии изучены слоевые нанопроволоки и показано, что магнитные свойства массива слоевых нанопроволок (в частности, направление оси легкого намагничивания в массиве Co/Cu-НП) зависят не только от аспектного отношения магнитного слоя, но и от отношения толщины слоя магнитного металла к толщине немагнитного спейсера (медной прослойки). При изучении двух типов нанопроволок применялся метод ядерный магнитный резонанс (ЯМР). Методом ЯМР (на ядрах 59Co) изучены слоевые структуры Co/Cu: показано, что в нанопроволоках со слоями меньшей толщины (и, соответственно, с большим вкладом интерфейсов) наблюдается большая доля атомов Co, координированных атомами Cu. Высокая доля атомов, координированных медью, позволяет предположить, что примесь меди входит и в кобальтовые слои. Проведено сравнение гомогенных нанопроволок из железа (ЯМР на ядрах 57Fe) с образцами объемного железа. Обнаружен сдвиг линии в сторону высоких частот (на 0.3 MHz), свидетельствующий об увеличении поля примерно на 0.2 T. Значительное уширение линии и уменьшение времени спин-решеточной релаксации может свидетельствовать о значительном разбросе величин локального магнитного поля. Ключевые слова: нанопроволоки, матричный синтез, микроскопия, элементный анализ, магнитные свойства, ЯМР.
Экспериментальное исследование элементов джозефсоновского параметрического усилителя бегущей волны на цепочке СКВИДов
Authors: Юсупов Р.А. , Филиппенко Л.В. , Фоминский М.Ю. , Кошелец В.П.
Published: June 2022

The issues of designing a Josephson traveling-wave parametric amplifier (JTWPA) based on a well-established technology of superconducting microcircuits with given and controlled parameters based on high-quality Nb-AlOx-Nb tunnel junctions are considered. This technology has been adapted and optimized to obtain structures with the required parameters and circuits with large number of tunnel junctions. To advance the technology, the basic elements of a promising JTWPA have been devel-oped, manufactured and studied. In direct current measurements, a number of super-conducting elements parameters were experimentally determined; these parameters are required for designing a JTWPA chips for microwave measurements. An original design of JTWPA based on a chain of SQUIDs in a coplanar line has been developed for implementation using the IRE niobium technology; the parameters of the main elements of the JTWPA have been determined.
Влияние контактного сопротивления интерфейса YBCO|Au на транспортные и СВЧ-свойства массивов джозефсоновских контактов из высокотемпературных сверхпроводников
Authors: Пестов Е.Е. , Левичев М.Ю. , Мастеров Д.В. , Парафин А.Е. , Павлов С.А. , Хоршев С.К. , Рогожкина Н.В.
Published: June 2022

The influence of the contact resistance of the interface of the YBCO/Au structure on the transport and microwave properties of arrays of high-temperature bicrystal Josephson junctions embedded in a coplanar transmission line has been studied. The current-voltage characteristics of Josephson structures fabricated using various technologies are studied: in-situ and ex-situ with annealing in an oxygen atmosphere. The results obtained can be used to create a quantum ac voltage generator based on high-temperature Josephson junctions.
Зависимость спектра спин-волновых возбуждений магнонного кристалла от поля подмагничивания
Authors: Кожевников А.В. , Высоцкий С.Л. , Дудко Г.М. , Хивинцев Ю.В. , Никулин Ю.В. , Филимонов Ю.А.
Published: June 2022

The spectrum of spin waves (SW) of tangentially magnetized films of yttrium iron garnet (YIG) with a surface metastructure in the form of gratings of etched grooves with a period Λ close to the film thickness d (Λ~d) has been experimentally and numerically studied. It has been found that the spectrum of the signal reflected from a microstrip transducer with a width w>>d,Λ located on the YIG film contains absorption lines associated with the excitation of the SW of the surface metastructure. In the case when the magnetic field H and the transducer are oriented along the grooves, the absorption lines of the metastructure are located at frequencies f* near the short-wavelength edge of the spectrum of the surface magnetostatic (Damon-Eshbach) wave fs. It is shown that f* linearly depends on H , which can be used to develop magnetic field sensors. The results of measurements of dependences f* (H) are in qualitative agreement with the results of micromagnetic modeling.
Планарные ансамбли многослойных пленочных микроэлементов на основе компонент Cu/FeNi
Authors: Мельников Г.Ю. , Лепаловский В.Н. , Свалов А.В. , Lazpita P. , Бузников Н.А. , Курляндская Г.В.
Published: June 2022

Планарные ансамбли многослойных периодических квадратных микроэлементов типа [Cu(6 nm)/FeNi(100 nm)]5 были получены методом ионно-плазменного распыления на стеклянные подложки с использованием сетчатых медных масок. Особенности поверхности микроэлементов анализировались с помощью стилусного профилометра, оптической и сканирующей электронной микроскопии. Статические магнитные свойства и особенности магнитной доменной структуры исследовались с использованием магнитооптического Керр-эффекта. Полученные планарные ансамбли могут использоваться как составная часть пленочных элементов детекторов слабых магнитных полей, работающих на основе магнитного импеданса (МИ), для повышения чувствительности МИ отклика к внешнему магнитному полю. Ключевые слова: многослойные пленочные структуры, ансамбли микроэлементов, периодические структуры, гигантский магнитоимпедансный эффект.
Бистабильность магнитных скирмионов в многослойной структуре ферромагнетик/тяжелый металл
Authors: Губанов В.А. , Mruczkiewicz M. , Садовников А.В.
Published: June 2022

The effect of the Dzyaloshinskii-Moriya interface interaction on the stability of magnetic skyrmions in the ferromagnet-heavy metal multilayer structure depending on the number of multilayer repetitions was investigated by micromagnetic modeling. The parameters of the multilayer structure for the stabilization of magnetic skyrmions in nanodisks formed by Ir/Co/Pt layers are selected. It is shown how the value of the Dzialoszynskii-Moriya exchange interaction affects the type, stability, and radius of magnetic skyrmions in multilayer nanopillars. The results obtained can be used to create devices for processing and storage information signals.
Влияние термоиндуцированного магнитоупругого эффекта на доменную структуру планарных Ni-микрочастиц
Authors: Нургазизов Н.И. , Бизяев Д.А. , Бухараев А.А. , Чукланов А.П. , Шур В.Я. , Ахматханов А.Р.
Published: June 2022

Results of studying the domain structure of planar Ni microparticles formed on single-crystal substrates from the lithium niobate and from the potassium titanyl phosphate at different temperatures are presented. The dependence of domain sizes on the sample temperature was studied. It is shown the observed change of the domain structure is caused by the magnetoelastic effect, which arises due to the difference in the thermal expansion coefficients of the substrate and microparticles as the sample temperature changes. It is shown, the sizes of magnetic domains, up to the creation of a state with a quasi-homogeneous magnetization may be set by the substrate temperature during the microparticles formation.
Влияние упругих деформаций на спектр дипольных спиновых волн в латеральной системе магнонных кристаллов с пьезоэлектрическим слоем
Authors: Грачев А.А. , Mruczkiewicz M. , Бегинин Е.Н. , Садовников А.В.
Published: June 2022

In this work, we will reveal the regularities in the control of the dipole spin-wava spectra of in lateral heterostructures formed from two magnonic crystals with a piezoelectric layer placed on one of them. The electric field control of the spatial and transfer characteristics of dipole spin waves in lateral heterostructures is shown. Based on the finite element method, the influence of distributed elastic deformations on the magnitudes of internal magnetic fields in magnonic crystals is evaluated. Based on the results of numerical simulations, a physical interpretation of the transformation of the eigenmode spectrum of coupled magnon crystals is given.
The effect of flip chart media on young women's knowledge of personal hygiene during menstruation at SMP O Mangunharjo, Musi Rawas Regency
Authors: Fitriani Desi , Sanisahhuri Sanisahhuri , Susanti Beti
Published: June 2022

Background: Personal Hygiene during menstruation is a component of personal hygiene that plays an important role in the status of a person's health behavior. The impact of personal hygiene problems if not maintained will cause excessive microorganisms such as fungi, bacteria, viruses that interfere with the function of reproductive organs and the occurrence of infection.
Objectives: This study aims to determine the effect of Flip Chart media on the knowledge of adolescent girls about Personal Hygiene During Menstruation at SMP O Mangunharjo, Musi Rawas Regency.
Methods: This study uses a quasi-experimental design using a one group pre-post test. This research was conducted at SMP O Mangunharjo, Musi Rawas Regency, with a population of 90 grade 7 adolescent girls. The sample of this research is 47 people using purposive sampling technique. Bivariate analysis was conducted to determine the effect of Flip Chart media on young women's knowledge of Personal Hygiene During Menstruation at SMP O Mangunharjo, Musi Rawas Regency with the Wilcoxon Signed Ranks Test.
Results: The results showed the average knowledge before counseling using Flip Chart media was 6.36, after counseling using Flip Chart media was 8.70. The results of the Wilcoxon Signed Ranks test obtained p-value = 0.000 <0.05, there was an influence of Flip Chart media on the knowledge of young women about Personal Hygiene During Menstruation at SMP O Mangunharjo, Musi Rawas Regency.
Conclusions: There is a difference in knowledge before and after counseling using Flip Chart media, then Ho is rejected and Ha is accepted. So there is an influence of the Flip Chart media on the knowledge of young women about Personal Hygiene During Menstruation at SMP O Mangunharjo, Musi Rawas Regency.
The leading factors of street teenagers' risky sexual behavior
Authors: Setianingrum Anindhita , Shaluhiyah Zahroh , Widjanarko Bagoes
Published: June 2022

Background: Teenagers who live on the streets are groups in a society prone to sexual violence and reproductive health risks. Sexually active street teenagers often engage in sexual activity in any place, change partners, and do not use contraceptives to prevent pregnancy and the risk of sexually transmitted diseases.

Objective: This study aimed to analyze factors related to risky sexual behavior of street teenagers in Semarang.

Methods: This study used a cross-sectional design with a research population of 10-18 years old street teenagers who became street teenagers assisted by the Social Office of Semarang. A sample of 81 teenagers was selected using the total population sampling technique. Data analysis used the Chi-square test and logistic regression with the 95% confidence level.

Results: The study results found a significant correlation between age, parental status, permissive attitude, risky health behavior, friends’ attitude, and friends’ risky reproductive health behavior with the risky sexual behavior of street teenagers in Semarang City (p<0.05). Multivariate analysis showed that the variables of friends’ attitudes and friends’ risky behaviors had simultaneous effects on street teenagers’ risky sexual behavior. Street teenagers who had friends with permissive attitudes were more at risk of engaging in sexual behavior 13 times than those who did not have permissive friends. Street teenagers who had friends with high-risk sexual behaviors were also ten times more likely to have risky sexual behaviors than those who had friends with low-risk behaviors.

Conclusion: This study concluded that the variable of friends’ attitude had the most significant influence on risky sexual behavior of street teenagers in Semarang. The efforts were necessary to establish peer-educators related to reproductive health education for street teenagers to reduce reproductive health risks.
Validation of risk perception questionnaire for covid-19: Indonesian version for critical care nurses
Authors: Ardiansyah Diki , Anggraeni Diah Tika
Published: June 2022

Background : The high need for intensive care in COVID-19 patients often has an impact on large workloads, long-term fatigue, and exposure to infections. Perception plays an important role in the desire to change behavior, including the impact. However, to date, there is no valid and reliable assessment instrument to measure risk perceptions of Covid-19.

Objectives: This study aims to examine the validity and reliability of the nurse's risk perception questionnaire in the care of Covid-19 patients in the Intensive Care unit according to the situation in Indonesia.

Methods: This study was conducted on nurses who treat COVID-19 patients in the ICU. The research design was carried out in a cross-sectional manner. The sampling technique used was total sampling, with a total of 35 respondents. The researcher conducted an analysis through five stages, namely translation and cross-cultural adaptation of the instrument in order to obtain the Indonesian version of the Risk Perception questionnaire. After that, a retrial was carried out on 15 nurses who worked in the COVID-19 room. The statistical test was used to test the validity and reliability using Cronbach's alpha and reliability analysis.

Results: The results of the validity test with Cronbach's alpha of 0.379 - 0.766 with a reliability test using analytical reliability of 0.943. The value of the r table is 0.3338. There are 5 items from the risk perception questionnaire that are not valid after the construct validity test. The researcher then issued 5 invalid items. So that there are 42 out of 47 questionnaire items that are relevant to the condition of nurses caring for COVID-19 patients in the ICU in Indonesia.

Conclusions: This risk perception questionnaire is valid and reliable, so the risk perception questionnaire can be used in Indonesia to evaluate nurses' risk perceptions in treating COVID-19 patients in the ICU. Researchers recommend health care providers evaluate nurses' risk perceptions using this questionnaire.  
The impact of early marriage on women of reasonable age In The Special Region of Yogyakarta
Authors: Alfiana Ratih Devi , Yulyani Linda , Subarto Claudia Banowati , Mulyaningsih Sundari , Zuliyati Isti Chana
Published: June 2022

Background: Early marriage is a form of violence and violation of children's rights. Early marriage that occurs in Indonesia is a very complex dynamic. Geographically, culturally and religiously, the level of acceptance and practice of child marriage varies across Indonesia. Based on the Report on the Fulfillment of Children's Rights in the Special Region of Yogyakarta in 2017, the number of child marriages in the Special Region of Yogyakarta was 294, a decrease from 2016 which was 346 (a decrease of 15.3%). Early marriage has a big risk of experiencing various bad things.

Objective: to find out what are the impacts of early marriage on women of reproductive age in the Special Region of Yogyakarta.

Methods: The data used in this study is secondary data from the Indonesian Health Demographic Survey (IDHS) issued by the BKKBN. The population in this study were all women of reproductive age whose data was recorded in the partner data in the 2017 IDHS report (Couples record). This research is an analytic study with a cross sectional approach. Data analysis was performed using Cremer's V and Contingency Coefficient analysis.

Results: The results showed that there was an effect of early marriage on several dependent variables in this study which was indicated by p value <0.05. Some of these variables are education (p=0.002), Welfare Index (0.025), marital history (0.033). In addition, there is no significant relationship between the respondent's early marriage with employment, choice of contraceptive method, role in decision making, knowledge of reproductive health and knowledge of domestic violence.
Conclusion: Reproductive health and sexuality education needs to be carried out strategically and systematically nationally and sustainably by involving various cross-sectors, starting from school education, community leaders, religious leaders and health workers. Appropriate and comprehensive teaching and education can help youth in making wise decisions regarding early marriage.
Emojis and Emoticons in Health Care and Dermatology Communication: Narrative Review
Authors: Szeto Mindy D , Barber Cara , Ranpariya Varun K , Anderson Jarett , Hatch Jonny , Ward Jordan , Aguilera Megan N , Hassan Shahzeb , Hamp Austin , Coolman Tyler , Dellavalle Robert P
Published: June 2022

Background

Emoticons and emojis have become staple additions to modern-day communication. These graphical icons are now embedded in daily society through the various forms of popular social media and through users’ personal electronic conversations. With ever-increasing use and inclusivity, exploration of the possible health care and dermatology applications of these tools is imperative.

Objective

The goal of this narrative review was to provide and evaluate an up-to-date literature survey examining the utility of emoticons and emojis in medicine. Special attention was paid to their existing and potential uses in the field of dermatology, especially during the COVID-19 pandemic.

Methods

A PubMed search of peer-reviewed publications was performed in mid-2021 to collect articles with emoticon or emoji keywords in combination with other health care–relevant or dermatology-relevant keywords. Screening of publications and described studies was performed by the authors with education and research experience in health care, dermatology, social media, and electronic communication trends. Selected articles were grouped based on common subjects for qualitative analysis and presentation for in-depth discussion.

Results

From this extensive search, researchers were able to identify a wide variety of publications detailing the use of emoticons and emojis in general health care, pediatric health care, public health, and dermatology. Key subject areas that emerged from the investigation included the ability of emoticons and emojis to improve communication within pediatric health care, enhance mood and psychological assessment or mental health screening in adults, develop interventions to improve patient medication adherence, complement novel means of public health and COVID-19 surveillance, and bolster dermatology-specific applications.

Conclusions

This review illuminated the repurposing of emojis and emoticons for a myriad of advantageous functions in health care and public health, with applications studied in many populations and situations. Dermatology-specific uses were relatively sparse in the literature, highlighting potential opportunities for growth in future studies and practices. The importance of diversity and inclusivity has extended to emojis, with the recent introduction of skin color customization and new emojis better representing the comprehensive spectrum of users’ experiences. A continuously evolving and technology-driven population creates a unique niche for emoticons and emojis to ease worldwide communication and understanding, transcending the barriers of age, language, and background. We encourage future studies and innovations to better understand and expand their utility.
Adsorption of Bemacid Red by Poly Tetra (Ethylene Glycol) Dimethacrylate Crosslinked with 2-Hydroxypropyl Methacrylate Hydrogels: Equilibrium and Kinetic Studies
Authors: Fasla Asmahane , Seghier Zoubida , Iddou Abdelkader , Caserta Laura
Published: June 2022

Besides others, textile industries are the primary sources of discharging a massive amount of highly colored wastewater. Adsorption can be considered the most economically favorable technology method for removing dyes from wastewater. This paper reports the synthesis of Poly tetra (ethyleneglycol) dimethacrylate crosslinked with 2-hydroxypropyl methacrylate (Poly (TtEGDMA-cross-2-HPMA)) hydrogelsand its application as a novel sorbent to remove bemacid red (ET2) dye from aqueous solution under various operating conditions. The equilibrium adsorption capacity was found 142.82–883.60 mg ET2 g–1 of 1% TtEGDMA. The adsorbent was characterized using Fourier transform infrared radiation (FTIR) and 13carbon solid-state nuclear magnetic resonance spectra (13C-NMR). The effects of the experimental parameters include dye concentration and crosslinked agent concentration. The kinetic sorption uptake for ET2 by Poly (TtEGDMA-cross-2-HPMA) at various initial dye concentrations was analyzed by pseudo-first and pseudo-second models. Two sorption isotherms, namely the Langmuir and Freundlich isotherms, were applied to the sorption equilibrium data. The sorption kinetics of ET2 onto the hydrogels followed the pseudo-second-order kinetics model (R2 = 0.999) and the adsorption equilibrium data obeyed the Langmuir isotherm model (R2 = 0.999). It can be concluded that Poly (TtEGDMA-cross-2-HPMA) is an alternative economic sorbent to more costly adsorbents used for dye removal in wastewater treatment processes.
Trace Element Content and Food Safety of Traditional Crackers (Kerupuk) Collected from Java Island, Indonesia
Authors: Kusmartini Indah , Lestiani Diah Dwiana , Kurniawati Syukria , Damastuti Endah , Adventini Natalia , Syahfitri Woro Yatu Niken , Sari Dyah Kumala , Dwi Atmodjo Djoko Prakoso , Santoso Muhayatun
Published: June 2022

In this study, trace elements in crackers were determined using Instrumental Neutron Activation Analysis (INAA) to assess their intake, food safety, and health contribution. The 62 samples of crackers were collected and purchased from local markets in five provinces of Java during 2013–2014. The validation method was performed using SRM Wheat Flour 1567a, with 80–110% accuracy (% recovery) and precision less than 10% (% RSD). The concentration of trace elements such as Cr, Co, Fe, and Zn was analyzed and found in the range of 0.03–1.4, 0.01–0.32, 14.49–85.70, 0.15–17.26 µg/g, respectively. Daily intake of elements in crackers contributes less than 1% to Recommended Dietary Allowances (RDA). Based on food safety evaluation through the calculation of Hazard Quotient, the value of Cr, Co, Fe, and Zn is less than 1, indicating that the crackers are safe for consumption and do not possess non-carcinogenic health risks due to heavy metals content. Therefore, the crackers in all Java provinces meet the current standards and are safe for consumption.
Antioxidant Flavonoid Glycoside from Leaves of Cacao Mistletoe (Scurrula ferruginea (Jack) Danser)
Authors: Efdi Mai , Pratama Dara , Itam Afrizal , Okselni Tia
Published: June 2022

Scurrula ferruginea (Jack) Danser is a folk medicine to treat several diseases. S. ferruginea is the mistletoe that lives by deriving nutrients from the host. Hence, the host has a significant effect on the biological activities and bioactive components of S. ferruginea. In this study, the leaves of S. ferruginea were macerated by methanol solvent to extract the chemical components and fractionated by hexane and ethyl acetate solvent, respectively, to separate organic compounds. The biological activity of crude extracts as the antioxidant was investigated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. The result showed that the highest antioxidant activity was obtained from the ethyl acetate fraction with the IC50 of 10.88 ± 0.39 µg/mL. Furthermore, the trituration method used several solvents to isolate secondary metabolites from the initial crude methanol extract. This purification process produced a flavonoid compound of quercitrin. The antioxidant activity of quercitrin was also determined by the DPPH method. The result showed that this compound has stronger activity than the crude extracts with the IC50 of 5.95 ± 0.11 µg/mL. This study demonstrated that cacao mistletoe of S. ferruginea may have the potential activity to treat the diseases caused by the presence of free radicals.
Trends of Forensic Analysis of Pen Ink Using Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) Spectroscopy
Authors: Abdul Khofar Putri Nabihah , Abdul Karim Umi Kalsum , Elias Ezlan , Safian Muhd Fauzi , Abdul Halim Mohamed Izzharif
Published: June 2022

Many articles have been published on ink analysis to assist Forensic Document Examiner (FDE) in examining questioned documents. Ink analysis encountered about 45% of ballpoint and 24% of gel pen in forensic cases. Typically, ink samples found on the documents are limited to small quantities, requiring non-destructive techniques to preserve the evidence. Previous studies on ink analysis cover about 80% of spectroscopy techniques, including the Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR). FDE prefers ATR-FTIR to retain the legibility of evidence since ATR-FTIR is known as non-destructive, fast, reliable, and precise instrumentation. Various modifications and developments to this technique have been published. Therefore, this work reviews the trend of analysis performed on samples of the document and evaluates the current approaches to the capacity of using ATR-FTIR on such samples. Remarks on the comparison studies are also included.
Molecular Dynamics Simulation of a tRNA-Leucine Dimer with an A3243G Heteroplasmy Mutation in Human Mitochondria Using a Secondary Structure Prediction Approach
Authors: Maksum Iman Permana , Maulana Ahmad Fariz , Yusuf Muhammad , Mulyani Rahmaniar , Destiarani Wanda , Rustaman Rustaman
Published: June 2022

Mitochondrial DNA mutations, such as A3243G, can affect changes in the structure of biomolecules, resulting in changes in the structure of Leucine transfer Ribose Nucleic Acid to form a dimer. Dimer structure modeling is needed to determine the properties of the structure. However, the lack of a structure template for the transfer of Ribose Nucleic Acid (tRNA) is challenging for the modeling of mutant structures of tRNA, especially mitochondrial tRNA that are susceptible to mutation. Therefore, this study predicted the structure of mitochondrial leucine tRNA and its stability through a knowledge-based method and molecular dynamics. Structural modeling and initial assessment were performed using RNAComposer and MolProbity, HNADOCK, and Discovery studios to form the dimer structure. Molecular dynamics simulations for stability analysis were performed using Amber and AmberTools20 software, showing that the conformational energy of the mutant leucine tRNA dimer structure was lower than the native structure. Moreover, the Root Mean Square Deviation (RMSD) of monomer native leucine tRNA was lower than the mutant, indicating that the dimer structure of mutant leucine tRNA is more stable than usual, and the normal leucine tRNA is more stable than the mutant.
PREDIKSI PERFORMANSI FLUIDA MAGNET-REOLOGI MENGGUNAKAN METODE PARTICLE SWARM OPTIMIZATION
Authors: Bahiuddin Irfan , Nur Faizin Ahmad , M A Hakiki Metsen , Akhmad Ismail Andhi , Imaduddin Fitrian , Syifa Atikasari Nadia
Published: June 2022

Fluida magnet-reologi (MR) adalah suatu material cerdas yang bisa dikontrol kekerasannya direpresentasikan oleh tegangan luluh dan viskositas yang bisa diubah. Kedua parameter tersebut diperoleh dengan membandingkan data eksperimen dengan persamaan Bingham plastik. Pemilihan data eksperimen yang tepat adalah kunci keakuratan prediksi tegangan luluh dan viskositas. Pemilihan data eksperimen umumnya dilakukan dengan metode coba-coba. Parameter yang diprediksi bisa mempunyai nilai yang berbeda meskipun materialnya sama. Oleh karena itu, diperlukan suatu metode yang bisa memprediksi secara sistematik kedua parameter tersebut secara optimum. Penelitian ini mengusulkan suatu metode untuk memilih data secara otomatis dan menghasilkan prediksi. Metode yang digunakan adalah particle swarm optimization (PSO). Fungsi objektif untuk proses optimasi dikembangkan berdasarkan model biplastic Bingham. Set parameter yang diprediksi ada dua grup, yaitu grup untuk aplikasi kecepatan rendah dan tinggi. Setelah dievaluasi, parameter yang diprediksi menunjukkan kesesuaian yang baik ketika dibandingkan dengan eksperimen. Kemudian, parameter diterapkan di suatu katup ‘berliku-liku’ yang menerapkan fluida MR untuk menghitung performansi. Performansi sebagai fungsi tegangan luluh dan viskositas juga telah berhasil disimulasikan dengan baik.
Factors associated with delay in the diagnosis of pulmonary tuberculosis in Belém/PA
Authors: El- Husny Claudia Ozela , Ferreira Angela Maria Rodrigues , Campos Jamilie Suelen dos Prazeres , Gama Kamila Nancy Gonçalves da , Palmeira Iací Proença , Ferreira Ana Lúcia da Silva , Souza Priscila Fonseca
Published: June 2022

Introduction: Tuberculosis control tools are a challenge to primary health care, due to the delay of people from the appearance of the first symptoms to the search for the first health-care service, and health-care services leading to difficulties and delay in establishing the diagnosis and initiation of treatment. Objective: to analyze the factors associated with the time from the identification of symptoms to the beginning of treatment for pulmonary tuberculosis and to measure the related time. Materials and Method: Quantitative, cross-sectional and analytical study, with 101 patients being treated for pulmonary tuberculosis, in five Basic Health Units. They were interviewed using an adapted and validated questionnaire. Data were analyzed using the G Test, in the BioEstat 5.3 Program. Results: 53.27% of patients were late to seek health-care services. The diagnosis was classified as “no delay” (50.5%). Male sex, complete high school education are factors related to delay in the diagnosis of tuberculosis, as well as the frequency of seeking health-care services for diagnosis showed statistical significance (p=0.0264). Discussion: Men are the most affected by the disease, due to risk factors. There is a need to invest in the training of teams to carry out early diagnosis and rapid suspicion of the disease. Conclusion: There are important actors in disease control: the health-care service and the patient. The delay is related to the tuberculosis patient, with the need to speed up the diagnosis of the disease, so that the patient does not have to return to the service several times.
Effects of Initial Public Offering on the Value of a Company: A Case Study of Tanzania Breweries Limited Company, Dar es Salaam
Authors: Mohamed Omary , Mbogo Crispin John
Published: June 2022

This study aims to analyze effects of initial public offering on the value of a company in Tanzania using Tanzania Breweries Public Limited Company as a case study. The specific objectives of the study were to assess the influence of stock price, asset valuation and intangible assets on the value of Tanzania Breweries PLC. The study adopted explanatory research design that included time series analysis (TSA) because analysis of the past is vital for forecasting the future and employed market timing theory. The method of data collection was documentary analysis; E-views was used to analyze the data which were collected from TBL, DSE and UNCTAD from 2010 to 2020. After confirming the existence of long-term associations between variables in our model, the collected data was submitted to ordinary least square (OLS) and t-values using the vector error correlation model. Results of the study indicated that asset valuation (ASSV) had a positive but small impact on the value of the company. While the short and long-term coefficients test between intangible assets (INTA) and stock price (STKP) had a negative and minor impact on Tanzania Breweries Company’s value at 5% of critical value. It is therefore suggested that organizations should focus on developing goodwill as one of the intangible assets that attract investors and shareholders. Management as well as owners of companies should be trained on the importance of using IPO as a source of improving the equity capital rather than using debt instruments. The government should strengthen policies and loosen some regulations, particularly for foreign investors, in order to attract more direct and indirect investment.
Investigation of Phytochemical in Euphorbia heterophylla and Euphorbia rothiana
Authors: D. Wadankar Gajanan , R. Mahale Bharati , V. Kute Mayuri , D. Khadse Pranali
Published: June 2022

The genus Euphorbia attracted the attention of many researchers as it is poorly studied. Euphorbia heterophyla and Euphorbia rothiana were selected and aimed to investigate the presence of phytochemicals screenings in leaf and stem. Aqueous, Acetone and Methanol Solvents were used for phytochemical analysis. The phytochemical analysis reveals the presence of phenolic compound in leaf and stem of the plants in all extracts and flavonoid using aqueous and methanol extracts. Our findings provides evidence, that aqueous and organic solvent extracts of these plants contain medicinally important bioactive compounds.
Vaginal laser therapy for gynecologic conditions: re-examining the controversy and where do we go from here
Authors: Zipper Ralph , Lamvu Georgine
Published: June 2022

Despite significant controversy, vaginal laser therapy continues to be used for treatment of many gynecologic and pelvic conditions including vaginal atrophy, vaginal dryness, dyspareunia, urinary incontinence and pelvic pain. This commentary reviews the controversy surrounding vaginal laser therapy and summarizes the important distinction between ablative and non-ablative vaginal lasers. While much research is still needed, the article describes what is important for healthcare professionals to know before making the decision to integrate this technology into their clinical practice.
La diplomacia digital en Twitter: el caso de México y Estados Unidos
Authors: Guadarrama Sánchez Hugo Alberto
Published: June 2022

El objetivo de la investigación se fundamenta en identificar las categorías temáticas de los mensajes en Twitter publicados por algunos de los representantes diplomáticos de México y Estados Unidos, ello con el fin de interpretar el trasfondo de sus agendas y discursos mediante sus palabras y frases. Con base en un método descriptivo, el cual permite identificar las propiedades, las unidades y los compuestos léxicos relevantes, se implementa un nivel de profundidad clasificatorio. Los resultados obtenidos muestran que las categorías sobresalientes debido a su constante frecuencia son: la pandemia, las vacunas, los encuentros diplomáticos y los conflictos internacionales entre Rusia, Ucrania y Estados Unidos. En el caso de los mensajes emitidos por México, se evidencian sus intereses y relaciones políticas con los estados latinoamericanos y caribeños, así como las inversiones extranjeras; en tanto las cuentas diplomáticas de Estados Unidos expresan continuamente su desacuerdo sobre las tenciones fronterizas entre Rusia y Ucrania.
Low-Cost Housing Using Monolithic Dome and Cylindrical Structure
Authors: Doke Ashwini
Published: June 2022

Abstract: Dome is an element similar to the hollow half of a sphere. It can also be defined as a thin shell generated by the revolution of a regular curve about one of its axes. The type of the curve and the direction of the axis of revolution determines the shape of the dome. Monolithic dome structures are cast in a one-piece form. The paper aims to do a comprehensive study of Monolithic Domes and the various advantages and key aspects of these structures and to determine whether they are more energy efficient, eco-friendly, cost effective and durable housing options compared to conventional structural systems. Keywords: Low Cost Housing, Monolithic Domes, Cylindrical Structures, Structural analysis, paper review
Voice Assistant ZIA using HDG algorithm
Authors: Murugan Deepalingam , Mohan Gowtham , Saravanan Hariharan , M V Dr Ishwarya
Published: June 2022

Abstract: In this computerized world, machine human interaction system was more common. For that kind of interaction, we achieve this voice assistant using machine learning and artificial intelligence. Using this we deploy executable code which works according to the user’s voice command. Voice assistants are the kind of software that use voice recognition technology, natural language processing and AI to response humans. using this technology, the device synthesizes the user’s message, breaks it down, evaluates it, and offers a meaningful response in return. So far google assistance, apple’s siri, amazon’s alexa, microsoft’s cortana were being well known assistance but they were all developed for specific platforms. We developed a software that can be bridge with all the platforms, as we did for the windows machine because we mainly concentrated to achieve some more features to give better experience. The purpose of this paper is to build the voice assistant with the speech recognition algorithm, interactional graphical interface and has a voice cloning technology to perform a task. Keywords: Artificial intelligence, Machine learning, Natural language processing, Speech Recognition, Graphical user interface, Voice cloning
Prediction of Air Quality Index Using Supervised Machine Learning
Authors: Relkar Rajat R.
Published: June 2022

Abstract: The proposed system depicts various strategies utilized for forecast of Air Quality Index (AQI) utilizing supervised machine learning procedures. The system examines machine learning algorithm for air quality index by computing algorithm accuracy which will bring about the best precision. Moreover, the system exhibits different machine learning ac- curacy figures from the given dataset with assessment order report which recognizes the perplexity lattice. The outcome shows the adequacy of machine learning suggested calculation method that can be contrasted and best exactness with accuracy, Recall and F1 Score. The air pollution database contains data for each state of India. Four supervised machine learning algorithms, decision tree, random forest tree, Naïve Bayes theorem and K-nearest neighbor are compared and evaluated.
Meaningful Learning through Virtual Reality and Augmented Reality Technological Environments
Authors: Saravanan Dr. S. K. , Parthasarathy Dr. S.
Published: June 2022

Abstract: Augmented reality (AR) overlies manually made materials directly over the real-world materials. Virtual and augmented reality industry committed innovative technologies that can be explored in the field of entertainment, education, training, medical and industrial innovation, and the development are explored. Augmented reality (AR) allows the physical world to be enhanced by incorporating digital knowledge in real time created by virtual machine. Few applications that have used augmented and virtual reality in real-world applications are discussed. VR will make it conceivable to educate in virtual situations that are difficult to picture in physical study halls, such as getting into virtual research facilities, imagining machines, mechanical plants, or even clinical cases. The gigantic prospects of open virtual advancements will make it conceivable to break the limits of formal instruction.
Prediction of Cardiovascular Disease Using PySpark Techniques
Authors: Dayana Ms. , Keerthika K , Manuela E Bibilin , Christina J Julie
Published: June 2022

Abstract: On a day after day, human life is affected by differing kinds of diseases that is why their life is in distress. cardiovascular disease may be a generic class of disease that's effective in spreading infections and notably, it affects the heart and veins. it's determined that vessel diseases have become modest in old individuals besides in children too. it's terribly requisite to portend this sort of illness within the starting phases; many varieties of tests square measure used for diagnosticating these ailments. This implementation has been done by employing a big data tool that's Apache Spark and victimization spark's MLlib and PySpark libraries that square measure integrated with it. Apache Spark is among the foremost wide used big data technologies, and it's a stack of some libraries that are Spark SQL, Spark MLlib, Spark Streaming, etc. This analysis work aims to create a prediction model to predict whether or not people have cardiovascular disease or not, using machine learning classification techniques that embrace logistic regression, decision tree, random forest to enhance the performance of models. They compared the analysis of all applied machine learning models. The results obtained are compared with the results of existing models within the same domain and located to be improved. Keywords: heart, blood vessels, Xampp server, data analytics, cardiovascular diseases.