bluuebunny/crossref_metadata_2025 huggingface dataset:
Pemisahan Pasir Besi menggunakan Metode Jigging dengan Variabel Ukuran dan Stroke
Authors: Fadilla Muhammad Yoga , Subandrio  , Palit Christin , Dahani Wiwik , Fadliah
Published: May 2024

Mineral pasir besi memiliki nilai ekonomis yang bermanfaat untuk kehidupan manusia. Pasir besi yang terdapat mineral seperti oksida besi, ilmenit, magnetit, hematite yang dibentuk dan tercuci oleh gelombang sehingga dalam proses pembentukannya terdapat sejumlah pengotor berupa kuarsa, piroksen, dan lain-lain. Pasir besi merupakan mineral besi yang memiliki perbedaan berat jenis dengan mineral kuarsa dan lain-lain. Oleh karena itu penelitian ini memiliki tujuan untuk melakukan pemisahan dengan perbedaan berat jenis antara mineral berharga dan mineral pengotornya (tailing) menggunakan metode Jigging guna meningkatkan kadar mineral berharga. Recovery yang didapatkan dengan pemisahan menggunakan metode perbedaan berat jenis ini mendapatkan kesimpulan bagaimanakah yang lebih efektif dalam pemisahannya. Variabel yang digunakan dalam penelitian ini berupa variasi ukuran pasir besi dan pukulan atau stroke, dari penelitian ini didapatkan hasil paling efektif pada ukuran material 100 mesh dengan pukulan atau stroke 35 dengan perolehan konsentrat sebanyak 167,4 gram dan tailing 12,27 gram dengan nilai recovery sebesar 94,99%.
النمذجة الخرائطية للتغيم وعلاقته بتذبذب درجات الحرارة باستخدام مستشعرات الاقمار الصناعية " قضاء الرمادي انموذجاً"
Authors: عارف العاني صفاء عبد الوهاب
Published: May 2024

تتحرى هذه الدراسة تأثير الأنواع المختلفة للغيوم المنخفضة، وبالتحديد السمك البصري للتغيم (السحب)، على شدة الإشـعاع الشمسي النافذ من هذه السحب في قضاء الرمادي تم التركيز على المعدلات العامة للحرارة وما بين ( 2012-2022) اثناء نشاط هذه السحب، و تأثيرها على نفاذ الإشعاع الشمسي. وتبين نتائجنا أن النفاذية تكون عالية للسحب من النوع الثالث من حيث السمك وهي المتوسطة بحسب تصنيف القمر الصناعي Sentinel-p5 والقمر الصناعي LandSat 9  ، وأوضحت النتائج بأن سمك السحب المنخفضة لها تأثير فعال في تخفيض الإشعاع الشمسي النافذ والذي يصل سطح الأرض.
دور المشرفين التربوين في تطوير الاداء المهني لمعلمي مادة الاجتماعيات لمديرية العامة لتربية بغداد الكرخ الثانية
Authors: محمود وليد عدنان
Published: May 2024

هدفت هذه الدراسة التعرف على دور المشرفين التربويين في تطوير الاداء المهني لمعلمي مادة الاجتماعيات لمديرية العامة لتربية بغداد الكرخ الثانية ، ولتحقق أهداف الدراسة قام الباحث بتصميم استبانة لقياس دور المشرفين التربويين في تطوير الاداء المهني لمعلمي مادة الاجتماعيات لمديرية العامة لتربية بغداد الكرخ الثانية فقد تم تحديد أفراد عينة الدراسة (209) معلم ومعلمة، وقد تم توزيع عدد (230) استبانة وتم اختيارهم بطريقة عشوائية تم استرجاع (215) استبانة بنسبة استرجاع بلغت (93.4%) وبعد تدقيقها أستبعد الباحث (15) استبانات غير صالحة للتحليل، أي أنه تم استخدام  (209)  استبانة لأغراض التحليل، وبعد إجراء التحليل الاحصائي تبين مجموعة من النتائج أبزرها أن دور المشرفين التربويين في تطوير الاداء المهني لدى معلمي مادة الاجتماعيات في مديرية تربية بغداد الكرخ الثانية جاء متوسطاً.
أشكال التجريب في عرض لغة الجسد المعاصر " حلم في بغداد " أنموذجا
Authors: حمود جواد صادق
Published: May 2024

كانت هناك تأثيرات للتجريب على الشكل المسرحي استطاع المخرج (انس عبد الصمد) توظيفها في العرض المسرحي العراقي (حلم في بغداد) وعمد الباحث إلى دراسة هذه الإشكال وقسمها إلى أربعة فصول تناول في الفصل الأول مشكلة البحث والحاجة إليه وأهمية البحث وهدف البحث وحدود البحث فضلا عن تحديد المصطلحات، أما الفصل الثاني الإطار النظري فقسمه الباحث إلى مبحثين الأول هو التجريب في المسرح مؤشرا أبرز مرجعياتها والثاني أهم تطبيقات التجريب في العرض المسرحي العالمي وبعدها ختم الباحث الفصل الثاني بأهم المؤشرات. أما الفصل الثالث فحدد الباحث مجتمع بحثه وطريقة اختيار العينة (حلم في بغداد) وتحليل العينة وخلص بأهم نتائج تحليل العينة، أما الفصل الرابع فستخرج الباحث أهم نتائج بحثه وما توصل إليه من استنتاجات وأوصى الباحث بمجموعة من التوصيات فضلا عن المقترحات وقائمة المصادر والمراجع وملخص البحث باللغتين العربية والانكليزية.
Investigating the Role of Brainstorming Strategy in the Developing the Writing Skills of First Year Students of the College of Administration and Economics
Authors: Jasim Rafal Mahmood
Published: May 2024

The present study aims at investigating the role of Brainstorming strategy in developing the writing skills of first year students of the College of Administration and Economics.
        The population of the study consists of first year students / College of Administration and Economics / University of Mosul.
        The researcher has intentionally selected (66) first year students, and has prepared an achievement test to check writing skills in the form of (write a paragraph).
         The instruments used in this research have been divided into the following three phases:
1.Pre-test: it’s purpose is to find out the initial ability of the students before presenting the materials according to the brainstorming method.
2.Treatment: has been given before the students did the post-test.
3.Post-test: it’s purpose is find out students’ development after presenting the materials through the application of the brainstorming method.
          By using some statistical means to analyze the data, the results show that there has been a statistically significant difference in the mean scores of both the pre- and post-tests in writing skills (in English language) taught according to the brainstorming method.
ELEVATING LEARNING: DEVELOPING HOTS CHALLENGES FOR SENIOR STUDENTS AT SMK PUI Cikijing
Authors: Nurfauziyah Sifa , Hamidah Ida , Suntini Sun , Fadhly Fahrus Zaman
Published: May 2024

This study aims to develop Higher Order Thinking Skills (HOTS) questions for Class XII Indonesian at SMK PUI Cikijing based on four HOTS criteria: the Operational Verb (KKO) aspect, critical thinking skills, creative thinking, and problem-solving. The research method used in this study is Research and Development (RD). The development model employed is the 4D model, limited to development only. Hence, the development stage begins with defining (analyzing Indonesian HOTS questions), designing (formulating HOTS questions based on the analysis of HOTS items regarding KKO aspects, critical thinking skills, creative thinking, and problem-solving), and developing (creating HOTS questions based on the analysis of HOTS questions in terms of KKO aspects, critical thinking skills, creative thinking, and problem-solving). Based on the analysis of the profile of Indonesian HOTS questions for Class XII at SMK PUI Cikijing, it is found that they are lacking in fulfilling the criteria for HOTS questions. Only 6% or 2 items are identified as HOTS questions, 30% or 9 questions need improvement, and 63% or 19 questions do not meet the HOTS criteria. Thus, there is a need to design HOTS questions based on the analysis of the HOTS item profile conducted in the defining stage. Subsequently, Low-Order Thinking Skills (LOTS) questions are transformed into HOTS questions based on four HOTS criteria: the Operational Verb (KKO) aspects, including C4 (analyzing) and C5 (evaluating) cognitive domains, critical thinking skills, creative thinking, and problem-solving.Keywords: development of HOTS questions, HOTS criteria, KKO, critical thinking skills, creative thinking skills, problem-solving skills.
Multi-Debris Capture by Tethered Space Net Robot via Redeployment and Assembly
Authors: Zhu Weiliang , Pang Zhaojun , Du Zhonghua , Gao Guangfa , Zhu Zheng H.
Published: May 2024

This paper presents an advanced multiple pieces of debris capture method for the tethered space net robot. A novel capture strategy that integrates redeployment and self-assembly techniques is introduced. With this strategy, the net robot self-assembles to close the net pocket and quickly maneuvers to nearby target debris. Upon reaching its target, the robot redeploys the net for debris capture. Central to this approach is the development of a capturing model that accurately describes the state function of the deployed net and incorporates an effective dragging method to counteract debris bouncing. To enable this multiple pieces of debris capture, an attitude consensus controller and a capture controller are designed using a finite-time scheme and terminal sliding mode, respectively. Numerical simulations reveal limitations in capturing multiple pieces of debris by existing design of tethered space net robots, where debris has the propensity to bounce out of a fully deployed net during multicapture attempts. The proposed strategy effectively mitigates these challenges, minimizing debris bounce and ensuring dependable multiple pieces of debris capture. Overall, the findings offer valuable insights to enhance the efficiency of active space debris removal missions.
Flow Structure Control Using Plasma Actuators
Authors: Redchyts Dmytro , Ballesteros-Coll Alejandro , Fernandez-Gamiz Unai , Tuchyna Uliana , Polevoy Oleg , Moiseienko Svitlana , Zaika Volodymyr
Published: May 2024

In the last few years, achieving precise control over flow structures has become increasingly crucial in aeronautics, space engineering, and wind turbine optimization. This study simulated the effects of dielectric barrier discharge on undisturbed air for flow structure control by means of plasma actuators. The analysis involved examining the flowfield, potential distribution, charge density, and components of the velocity vector within the computational domain based on numerical simulation results. The investigation revealed that the maximum flow velocity, accelerated by the plasma actuator, reached 4.5 m/s with a corresponding flow opening angle of [Formula: see text]. The study also explored the impact of dielectric barrier discharge on the flow around a cylinder with a plasma actuator in on/off states. The physical characteristics of the flow around a circular cylinder were identified for both switched-off and switched-on plasma actuators. Notably, the study demonstrated the efficacy of reducing the cylinder’s drag factor by suppressing the Karman vortex street through the operation of four plasma actuators based on dielectric barrier discharge. The obtained results exhibited good agreement with experimental data. The developed approach demonstrated high computational efficiency. Activation of the plasma actuators significantly reduced the drag factor for the cylinder from 1.2 to 0.1.
Strengthening Panchayati Raj Institutions – Missing Focus on the Upper Tiers
Authors: Roy M. N.
Published: May 2024

No abstract.
Primary Cutaneous Aspergillosis in an HIV Patient and Combined Therapy: A Case Report
Authors: Méndez-Flores Silvia , Vega-Santoyo Marla Lucero , Hernández-Hernández Francisca
Published: May 2024

Primary cutaneous aspergillosis (PCA) is a rare disease caused by a few pathogenic species of Aspergillus. It manifests in immunocompromised patients as different types of localised lesions, the treatment has evolved and the latest reviews ensure better results with a combined therapy. We present a 27-year-old male gardener with a history of human immunodeficiency virus infection and a nodular presentation of PCA. He received surgical and antifungal medication, showing a good response and no dissemination or recurrence of the disease.
BEHAVIORAL ANALYSIS OF STUDENTS' CREATIVE THINKING ABILITY IN LEARNING MATHEMATICS
Authors: Nurazizah Ramadhini  , Abdurrahman  , Wahyuni Reni , Suripah
Published: May 2024

The purpose of this research is to explain the ability of students' creative thinking in learning mathematics in regards to their behavior in class VIII. This is a descriptive qualitative research. Written tests and questionnaire procedures were utilized to gather data. A number of data analysis methods have been employed in this research: (1) data collecting; (2) data reduction; (3) data presentation; and (4) conclusion drawing. This study concentrated on four elements: (1) fluency; (2) flexibility; (3) originality; and (4) elaboration. According to the findings of this research, the creative thinking ability of grade VIII students is included as part of the creative category with an average percentage of 63.75%. While the attitude of grade VIII pupils is regarded as good, with an average percentage of 73.10%. In the creative thinking ability as good, students with a positive attitude have a creative thinking rate of 63.19%. Overall, students with very good and good attitudes have creative thinking ability.
THE DEVELOPMENT OF INTERACTIVE MULTIMEDIA LEARNING IN VOCATIONAL SCHOOL
Authors: Miftahir Rizqa  , Radhiatul Husni  , Ulva Rahmi
Published: May 2024

The purpose of this study is to develop the use of interactive multimedia learning in vocational schools in Indonesia. This learning media was used on material about diagnosing computer and peripheral operation problems and was developed by using the Instructional Development Institute (IDI) development method. This method included the following stages of the procedure: define, develop, and evaluate. Furthermore, the subject of this study was the first-grade students in SMK N 1 Hiliran Gumanti. The result showed that 1) The development of learning media based on interactive multimedia was considered valid based on the content by 5 experts of 91.80%; 2) Based on the responses of 28 students, interactive multimedia learning was proved to be more practical by 85.25%; 3) The use of effective multimedia learning improved student learning outcomes showed by an incline on students’ scores from 42.1% to 84.21%. Briefly, the development of interactive multimedia learning has proved to be valid, practical, and effective. This media learning can be used to enhance student learning outcomes related to the material about diagnosing computer and peripheral operation problems in the vocational school.
Flood‑Induced Health Vulnerability: A Case Study of Nirmal Char in Murshidabad District, West Bengal
Authors: Alam Snehashis , Bera Mohan Kumar
Published: May 2024

The chars (riverine sand bars) are poorly connected to the mainland and are prone to natural hazards like floods. Char lands are occupied by people from lower-income groups who have been living in an ecologically fragile landscape. The frequent floods affect the char dwellers’ health and health infrastructures and limit access to health care services. A study has been conducted to assess the health vulnerability of char dwellers in Nirmal Char in the Murshidabad district. The current study explores the impact of floods on the health of char dwellers during pre-flood season which differs from or is similar to flood season. The health vulnerability of the char dwellers was measured in terms of flood exposure, flood sensitivity and flood adaptive capacity. The primary data collected from selected households reveals that the livelihood conditions of most of the char dwellers have been severely affected during the flood, introducing different health-related diseases (i.e. typhoid fever, malaria, diarrhea and dengue) catalysed due to the lack of accessibility to health care facilities. The present study showed that up to 97.87% of households had a high level of vulnerability and 2.13% had a moderate level of vulnerability. We concluded that early flood warning, flood prevention measures and long-term mitigation strategies must be strengthened for char dwellers as they face greater health problems. Therefore, a context-specific sustainable health policy intervention is required to improve the adaption capacity of char dwellers.
Chemical reduction method-based copper nanoparticle synthesis and it's characterization
Authors: Tomar Nitika , Sharma Vivek , Tomar Sapna
Published: May 2024

The objective of this study is to develop a simple, inexpensive technique method for producing copper nanoparticles in an inert atmosphere. The chemical reduction technique has been shown to be a quick and effective way to make copper nanoparticles. With the aid of ascorbic acid and sodium hydroxide, copper sulphate pentahydrate gets reduced. We precisely investigated the particle sizes, compositions and morphologies using Field emission scanning electron microscopy (FESEM) and X-ray diffraction (XRD). Copper nanoparticles with sizes ranging from 14 to 55 nm have been created using chemical reduction. Copper nanoparticles have the face centre cubic (FCC) structure discovered through structural analysis due to small size.
ВЗАИМОСВЯЗЬ ПАРОДОНТИТА И СЕРДЕЧНО-СОСУДИСТЫХ ЗАБОЛЕВАНИЙ У ПАЦИЕНТОВ НА АНТИКОАГУЛЯНТНОЙ ТЕРАПИИ. ОБЗОР ЛИТЕРАТУРЫ
Authors: Кайгородов В.А. , Нуриева Н.С. , Тезиков Д.А.
Published: May 2024

Статья является результатом обзора актуальной российской и иностранной литературы. На их основе изучено влияние заболеваний пародонта и сердечно-сосудистых заболеваний друг на друга. Подчеркнута важность внимания к пациентам на антикоагулянтной терапии. Упоминаются доказательства возрастания риска заражением COVID-19 при имеющихся сердечно-сосудистых заболеваниях и заболеваниях пародонта. Подчёркнута важность просветительской работы.
ОТРАБОТКА ФУНКЦИОНИРОВАНИЯ ПИЛОТАЖНО-НАВИГАЦИОННОГО КОМПЛЕКСА МАЛОГО БЕСПИЛОТНОГО ВЕРТОЛЁТА С ИСПОЛЬЗОВАНИЕМ ПОЛУНАТУРНОГО МОДЕЛИРУЮЩЕГО СТЕНДА
Authors: Ляпин Д.С. , Миронов П.Н.
Published: May 2024

Проведен анализ малых беспилотных вертолётов. Рассмотрены стенды для проведения испытаний пилотажно-навигационного комплекса малого беспилотного вертолёта. Показана необходимость объединения стендов для улучшения качества испытаний.
АНАЛИЗ КРУТИЛЬНЫХ КОЛЕБАНИЙ ЛАЗЕРНОГО ГИРОСКОПА НА ВИБРОПОДВЕСЕ С ИСПОЛЬЗОВАНИЕМ ПРОГРАММНОГО КОМПЛЕКСА «ЛУЧ»
Authors: Гаврилов А.В. , Тихменев Н.В. , Фимкин А.А. , Синельников А.О.
Published: May 2024

В статье представлено краткое описание возможностей программного комплекса «Луч», описан алгоритм нахождения перекрытия крутильного и паразитного колебаний корпуса лазерного гироскопа на виброподвесе с использованием интегрированной среды разработки «Луч».
Digital Chemistry: Navigating the Confluence of Computation and Experimentation – Definition, Status Quo, and Future Perspective
Authors: Bräse Stefan
Published: May 2024

Digital chemistry represents a transformative approach integrating computational methods, digital data, and automation within the chemical sciences. It is defined by the use of digital tools and algorithms to simulate, predict, accelerate, and analyze chemical processes and properties, augmenting traditional experimental methods. The current status quo of digital chemistry is marked by rapid advancements in several key areas: high-throughput screening, miniaturization, machine learning models, quantum chemistry, and laboratory automation. These technologies have enabled unprecedented speeds in discovering and optimizing new molecules, materials, and reactions. Retrosynthesis and structure-active prediction tools have supported these endeavors. Furthermore, integrating large-language models and robotics in chemistry labs (self-driving labs) has begun to automate routine tasks and complex decision-making processes. Looking forward, the future of digital and digitalized chemistry is poised for significant growth, driven by the increasing accessibility of computational resources, the expansion of chemical databases, and the refinement of artificial intelligence algorithms. This evolution promises to accelerate innovation in drug discovery, material science, and sustainable manufacturing, ultimately leading to more efficient, cost-effective, and environmentally friendly chemical research and production. The challenge lies in advancing the technology itself, fostering interdisciplinary collaboration, and ensuring the ethical use of digital tools in chemical research.
Streamlining SuFEx Inhibitor Development: A Unified Approach Using Orthogonal Sulfinate Protecting Groups
Authors: Patel Twinkle , Chi Yumeng , Laha Ramkrishna , Moschitto Matthew
Published: May 2024

Sulfonyl fluorides have gained significant importance due to their classification as a click reaction and therefore have seen increased use in drug discovery and biochemistry. Their use, however, is complicated by the methods by which they are synthesized and their general synthetic instability. This results in sulfonyl fluorides being introduced late in a synthetic route with minimal structural diversity. Masking the reactivity of a sulfonyl fluoride by protecting the parent sulfinate is one method to ameliorate these issues. This study outlines discovery and selection of sulfinate protecting groups (SPGs) based on their overall stability, ease of synthesis, and simple deprotection conditions. This includes the discovery of two novel, photolabile sulfinate protecting groups (SPGs), para¬-methoxybenzyl Rongalite and ortho-nitrobenzyl Rongalite that can be directly converted to the sulfonyl fluoride using light and selectfluor. Along with known SPG, 2-trimethylsilylethyl sulfone (SES), all three SPGs were found to possess broad stability when exposed to numerous common synthetic conditions and are easily coupled to aryl halides from their sulfinate salt precursor. Overall, having access to a wide range of stable, easily functionalized SPGs will aid in increasing the structural diversity of sulfonyl fluorides.
Functionalized polysaccharides improve sensitivity of tyramide/peroxidase proximity labeling assays through electrostatic interactions
Authors: Heiniger Malvina , Vanella Rosario , Walsh-Korb Zarah , Nash Michael A.
Published: May 2024

High-throughput assays that efficiently link genotype and phenotype with high fidelity are key to successful enzyme engineering campaigns. Among these assays, the tyramide/peroxidase proximity labeling method converts the product of an enzymatic reaction of a surface expressed enzyme to a highly reactive fluorescent radical, which labels the cell surface. In this context, maintaining the proximity of the readout reagents to the cell surface is crucial to prevent crosstalk and ensure that short-lived radical species react before diffusing away. Here we investigated improvements to tyramide/peroxidase proximity labeling for enzyme screening. We modified chitosan (Cs) chains with horseradish peroxidase (HRP), and evaluated the effects of these conjugates on the efficiency of proximity labeling reactions on yeast cells displaying D-amino acid oxidase. By tethering HRP to chitosan through different chemical approaches, we localized the auxiliary enzyme close to the cell surface and enhanced the sensitivity of tyramide/peroxidase labeling reactions. We found that immobilizing HRP onto chitosan through a 5 kDa PEG-linker improved labeling sensitivity by over 3.5-fold for substrates processed with low turnover rate (e.g., D-lysine), while the sensitivity of the labeling for high activity substrates (e.g., D-Alanine) was enhanced by over 0.6-fold. Such improvements in labeling efficiency broaden the range of enzymes and conditions that can be studied and screened with tyramide/peroxidase proximity labeling.
Flexible Electrochemical Stripping for Wastewater Ammonia Recovery with Real-Time Product Tunability
Authors: Kogler Anna , Gong Meili , Tarpeh William
Published: May 2024

Nitrogen in wastewater can be recovered to prevent negative environmental, human health, and economic impacts and to enable distributed chemical manufacturing. We developed novel flexible electrochemical stripping (FECS) for tunable recovery of ammonia/ammonium (total ammonia nitrogen, TAN) from urine as ammonium sulfate and aqueous ammonia. Batch and continuous experiments demonstrated that product speciation could be readily controlled by modifying electrochemical cell operation frequency, duration, and applied current without affecting TAN removal. During continuous experiments, FECS recovered ammonia solutions with concentrations similar to ready-to-use cleaners (1% and 2% aqueous ammonia (w/w) or 8.22 and 16.4 g/L TAN) and cleaner concentrates (5% aqueous ammonia (w/w) or 41.1 g/L TAN), as well as ammonium sulfate solutions between 5 and 18.4 g/L TAN, approaching commercial fertilizer concentrations (28.4 g/L TAN). Beyond modifying applied current, future process engineering and operating condition optimization should reduce energy consumption, increase recovery efficiency, and enhance economic viability of FECS. Our findings will enable development and deployment of electrochemical nitrogen recovery in contexts with varying needs for ammonia-based products, paving the way for circular economies that integrate distributed chemical manufacturing with sanitation systems.
Skills-First Approach in the Context of the Twin Transition
Authors: PASNICU Daniela
Published: May 2024

Skills, reskilling and higher qualifications have become increasingly important in the labor market as a result of the labor shortage faced by economic agents. This labor shortage is due to the effects of the twin ecological and digital transitions, demographic aging and the speed with which skill requirements in the labor market are changing and will trigger significant changes in the labor market. The aim of the paper is to understand the changes on the labor market in the context of the acceleration of twin transitions and how the skills-first approach could improve this transition in Romania. After reviewing the specialized literature and presenting the theoretical framework, the evolution of the Beveridge Curve in the period 2008-2022 and the social impact of the twin transition will be analyzed. The results underline the maintenance of the low capacity of the economy to create new jobs, as well as the large number of people without a job in the period 2020-2022. The top skill required on the labor market is the use of digital tools and top occupations in this skill are of ICT professionals, researchers, engineers.
SIMULATION OF PHOTOVOLTAIC BASED DC MICROGRID WITH ENERGY STORAGE SYSTEM
Authors: Kumar Piyush , Mahanty R.N.
Published: May 2024

With worldwide demand for clean and unlimited energy increasing, there has been a shift towards the use of photovoltaic systems. Photovoltaic systems convert solar energy into electrical energy, based on the principle of photovoltaic effect. Photovoltaic systems have found various usages from low power requirements like residential homes, irrigation systems, EV (Electric Vehicle) charging station, to high power usages where they power off grid areas and microgrids. Among this, one of the most common configurations of PV system is using PV system with Battery Storage Systems. However, PV systems inherit intermittency which can cause severe malfunction of system components as well as load that is connected to it. This paper presents a simulation of an ideal photovoltaic based DC microgrid with battery storage system under different irradiance conditions. The system is modelled in MATLAB/SIMULINK, and benefits of using battery storage systems are discussed.
WIRELESS BIDIRECTIONAL POWER SYSTEM FOR ELECTRIC VEHICLES - A REVIEW
Authors: Pramanik Anwesha , Yadav K.B. , Rathore Vishal
Published: May 2024

Wireless Electric Transfer (WET) is a cutting-edge technology that allows power to be transmitted without physical contact. Most power technology is being converted to wireless technology by various methods as technology advances. Even if electric vehicles and plug-in hybrids are relatively new and viable, it is insufficient to keep the power source unplugged a night before. When an electric car park in a designated parking area with a transmitter circuit in place, charging will begin automatically. The Inductively Coupled Power Transfer System (ICPT) was discovered to be an excellent way for charging electric automobiles wirelessly after a study of a few wireless charging systems (Electric Vehicles). Bidirectional IPT (Inductively Coupled Power Transfer System) presented in this paper is suitable for Vehicle to Grid (V2G) systems. For Electric Vehicle charging, this Bidirectional Wireless Power Transfer is a dependable, powerful, and effective technology. Wireless power approaches comprise two classes: non-radiative and radiative. The study will also improve the system’s practicality, dependability, and efficiency.
CLASS DE RESONANT INVERTER BASED WPT SYSTEM FOR E-SCOOTER APPLICATIONS
Authors: Das Anamika , Bhattacharya Ananyo , Sadhu Pradip Kumar
Published: May 2024

Amongst the various coupling methods for WPT systems Resonant inductive coupling (RIC) is one of the most popular and it is being extensively used in various applications due to their high efficiency and few other advantages. In this paper a properly compensated 100 Watt WPT system is designed involving a Class-DE parallel resonant VSI connected to a DC input of 100 Volts and the same is simulated in MATLAB/SIMULINK. The proposed design shows a DC-AC(inversion) efficiency of 90.37%, transmission efficiency of 81.02% over an wirelessly coupled coil with coupling coefficient of 0.5 , and the overall system efficiency of 72.31% yielding sinusoidal voltage and current output with reduced voltage stress across the switches. The proposed circuit has also been validated in Typhoon Hill 402 real time simulator.
SIMULATION AND RTDS IMPLEMENTATION OF BIDIRECTIONAL DC/DC CONVERTER FOR BESS OPERATION OF SOLAR ENERGY STORAGE SYSTEM
Authors: Basu Arpita , Singh Madhu
Published: May 2024

This paper presents a comprehensive design and control strategy for a photovoltaic (PV) energy system. This system consists of a 2kW photovoltaic system, two converter circuit, a resistive load of 6ohm and battery storage. Resistive load and battery system is connected to a common DC bus. This scheme offered two converter topologies; one is boost converter and another is DC / DC bidirectional converter. The boost converter is directly connected in series to the PV array whereas the bi-directional DC/DC converter (BDC) is connected to the battery. The boost converter is used to regulate the maximum power point tracking (MPPT) of the PV array. For MPPT from the solar array the Perturb And Observe method (P And O) is used. The bi-directional converter regulates battery charging and discharging power flow. Closed-loop control of bi-directional controller is implemented with Proportional Integral(PI) controller. The implementation of the control system of the battery management system is implemented using dSPACE 1202 controller. The simulation and the real time simulation results shows that the proposed system deals with charging-discharging accurately and successfully under different condition tested.
INVERTER CONTROL STRATEGY FOR GRID ASSEMBLED PHOTOVOLTAIC SYSTEM USING ARTIFICIAL NEURAL NETWORK
Authors: Kumari Pooja , Sahay Shuvam , Kumar Niranjan
Published: May 2024

Renewable energy sources (RES) are grooming especially when we need a clean and green energy. It will reduce the dependency on fossil fuels and also reduces the environmental pollution. To improve efficiency in power system numerous techniques and optimization algorithms are available. But with each one some limitations and its complexities are there because they are time consuming due to heavy computation burden, large number of iterations, need heavy computation and slow convergence. So, a proficient method is required for tackling this issue. Therefore, we need to implement an efficient technique for solving this problem. This paper presents the inverter control strategy using Artificial neural network for grid assembled photovoltaic system. The three-phase inverter have been simulated by using ANN technique to mitigate the problems of voltage instability, harmonics distortion in case of constant irradiance, variable irradiance and faulty condition also. The obtained output in the proposed system reduces the harmonics to a large extent and it will also eliminate the power quality issues by inoculating the real or reactive power with no or very less distortions than the one in traditional system.
A SOLUTION OF RPM FOR ACTIVE AND REACTIVE LOADING COMPENSATION
Authors: Badi Manjulata , Mahapatra Sheila , Raj Saurav
Published: May 2024

A solution for Reactive Power Management considering both the active and reactive power loading is obtained by Butterfly Optimization Algorithm (BOA) hybridized to form of Butterfly Optimization Algorithm-Grey Wolf Optimization (BOA-GWO) algorithms. The objective of the research is to optimize the operating cost and power loss for optimum reactive power solution with the proposed combined algorithm and a comparative account with other algorithms depicts the proposed algorithm’s superiority. In view of best result obtained for real power cost reduction is 3.5% and percentage loss as 3.493% with the validations of state of art literature. The proposed technique delivers superior results when compared with other established algorithms in the literature.
A METAHEURISTIC OPTIMIZATION APPROACH IN HYBRID RENEWABLE ENERGY SYSTEM
Authors: Das Mondal Anindita , Ali Khan Nasim
Published: May 2024

India is a country of vast population. After a long gap of inaccessibility of energy due to the covid 19 pandemic situation, our country is now in need of huge amount of energy development as all kind industries have started working. In the next ten to fifteen years there will be a need of huge of electricity for which new power systems have to be installed. These power systems have to be designed in such a way that it should have energy efficiency infrastructure to enable optimal power supply. In this view robust, novel power generation, storage, transmission and controller design are the prior elements for designing these systems. Keeping in mind about all these needs and elements, a very new concept has been proposed which is accepted globally that is use of different types of non-conventional energy like wind, solar, biomass, geothermal etc. Use of these renewable energies can reduce the cost of production of energy and also it is that kind of source which in utmost reliable. In this view, solar-wind energy combination has been chosen out of all other renewable resources. Using of these sources can be reliable in every aspect but as these energies are variable in their availability, variation in load may occur which in turn may result in power outage and fault in grid network. A time variant nonlinear behavior computational features with suitable control algorithm has to be proposed to meet the irregularity of power supply, power peak, demand and long-term storage. In this paper, the mentioned renewable resources that is solar-wind hybrid renewable model designed with variable speed controlled stand-alone PMSG WT generator and battery management control units. In this paper, Firefly Algorithm (FA) has been used for desirable tuning of PID controlled parameters. Proposed FA based PID controller system regulates the battery modes for optimum power generation in variable load condition.
SECRET KEY VERIFICATION TECHNIQUES FOR GRAPHICAL PASSWORD AUTHENTICATION SYSTEM TO AVOID SHOULDER SURFING
Authors: M. Senbagavalli , Debnath Saswati , K. Ramalakshmi
Published: May 2024

The main objective of this proposed system is used to reduce the human effort and time to complete any online process in successful and secure way. Because Nowadays, Most of the Work is done online. Internet has reduced a lot of human efforts. These difficult and time-consuming tasks have been eased through the Internet. Everyone goes to their own portals/sites or uses app to complete these duties. The current confirmation frameworks need safer and dependable strategies. Thus, an upgraded rendition of Graphical secret key verification framework is required, one that can find harmony between security, availability, and dependability. A graphical password is an authentication mechanism that allows users to choose from a set of images shown in a graphical user interface in a predefined order. Users recall images better than text therefore, graphical passwords are easier to remember. There are two types of graphical passwords techniques that is recall-based and recognition-based. Security specialists have worked hard to protect systems and as a result, individual users digital assets. Because of the growing number of risks posed by the internet or networked computer systems, there is a pressing need for such activity prevention. The present most famous technique for confirmation is alpha-numeric messages that have shown to be vulnerable to a variety of attacks including sup-positioning, Malwares, and spyware etc. most picture-based passwords are vulnerable to bear riding attacks. If this flaw is addressed, realistic passwords will be immensely beneficial because they are more grounded and easier to remember than long printed passwords. So, the proposed method that is Image based and grid-based techniques are used to avoid the hacker from watching over our shoulders.
A VIRTUAL POWER PLANT ENGINEERING WITH DISTRIBUTED ENERGY RESOURCES: A REVIEW
Authors: Srinivasa Rao Gummadi , SrinivasaRao T. , Mahesh Babu B.
Published: May 2024

The Distributed Energy Resources (DERs) and their integration in utility system in terms of visibility and handling capacity can be improved by developing Virtual Power Plant (VPP). These DERs further by making an appropriate interface with system components operates and manages the power market. Thus representation of DERs in such VPPs results in low cost power plant planning and estimation. Further, this could be well willful replacement for predictable Power Plants (PPPs) in terms of energy creation and installed capacities. These VPPs can be a better visualization tools and on providing analytical interface can be a good energy forecasting environment. The paper gives a review of such virtual power plant environments. The study further overlays and gives the research findings of different analytical DER aggregative methods to study the demand response of a chosen plant as virtual power plant.
SELF-STARTING POWER MANAGEMENT SYSTEM FOR SEDIMENT MICROBIAL FUEL CELL TO POWER ELECTRONIC DEVICES
Authors: Kumar Tripathi Ramesh , Prasad Jeetendra
Published: May 2024

Sediment microbial fuel cell (SMFC) generates a very low voltage which enables to power the electronics device. A power management system (PMS) has been implemented to extract energy from SMFC to provide power in a remote location. A Dc-Dc boost converter and a super capacitor are used in PMS. Eight SMFCs are implemented in the laboratory and are connected them in the series-parallel electrical connection. The energy obtained from stack SMFC is stored in the super capacitor. The energy stored in the super capacitor is applied to drive a Dc-Dc converter. The advantage of introducing the super capacitor in between the stack SMFC and the converter is that it provides a constant input voltage for the Dc-Dc converter. Two separate experiments are performed for the 6 V and 21.40 V. This PMS is able to drive a high voltage electronic device. The presented PMS system with SMFC is sustainable, self-powered, maintenance-free, and environment-friendly, which can be used in a remote location.
DEVELOPMENT OF AN ONLINE WEB BASED TELEMEDICINE SYSTEM FOR REMOTE PATIENTS
Authors: Dey Rajesh , Ahmed Nihal Ibtisum , Islam Joy , Monirujjaman Khan Mohammad , Islam Kaisarul , Nanda Ipseeta , Bhattacharya Ananyo
Published: May 2024

A web-based telemedicine system between a patient and a doctor is presented in this paper. Telemedicine is something people can get medical treatment from a certified doctor online. As COVID-19 hit the world, many countries took the initiative to take non-therapeutic preventive measures, and telemedicine can play an important role. More than half the population lives in rural areas in Bangladesh, and there are not enough specialized doctors for that population. People who live in rural areas either have to wait a long time to get connected with a doctor or have to travel far to get to the big cities. So, most of them have to consult quack doctors to get medical treatment. The primary focus of this research is to create a web-based telemedicine system that is cost-effective, simple to use, and portable in the event of a pandemic, and that can be utilized anywhere in Bangladesh. Anyone can find their specific doctor to get medical treatment instantly. There will be a dashboard for both patients and doctors to track everything effortlessly. There will be a profile page for both, and they can edit and update their profile page at any time. The payment gateway is also very easy to use and hassle-free. We used PHP and Java-script to develop the backend, HTML and CSS for the frontend, MySQL for database design, and, for the video API, we used videoHDK. This system was tested in a lab environment, and it produced satisfactory results at such a low cost and was user-friendly as well.
PRODUCT RECOMMENDATION SYSTEM USING MACHINE LEARNING THROUGH BIG DATA IN E-COMMERCE WEBSITE
Authors: Dey Rajesh , Nanda Ipseeta , Saiful Islam Md. , Sakib-Ur-Rahman Syed , Ahmed Rakin Syed Shahir , Yeasin Riza Afsana , Islam Kaisarul , Monirujjaman Khan Mohammad
Published: May 2024

This paper presents the design and implementation of a recommendation system in e-commerce website using machine learning. A recommendation system is a system that is based on an analysis of product purchases, customer demographics, and buy history.Recommendation activities are common in our daily lives, owing to the many products and methods of recommendation, as well as activities in various forms, such as supermarkets and shopping. A type of recommendation system is the purchasing guide, which recommends users’ preferred products and increases sales.The aim to design a recommendation system is to make information environments for the users. One of the most common and easily understandable applications of big data is the recommender systems. Users will be able to search through data records that are relevant to their interests and preferences using this system.Machine learning will help recommended engine so that customers easily find their desire product. E-commerce sites employ recommender systems to make product recommendations to their clients. Products are frequently recommended based on the top overall sellers on a website, as well as the client’s demographics. Products can also be recommended based on an analysis of a customer’s previous purchasing behavior as a predictor of future purchasing behavior.
DIGITAL HEALTHCARE (E-HEALTH) SERVICES IN BANGLADESH AND CHALLENGES
Authors: Nanda Ipseeta , Tazin Tahia , Monirujjaman Khan Mohammad , Hossain Tabia , Dey Rajesh , Arifur Rahman H.M.
Published: May 2024

Bangladesh is a rapidly developing South Asian country with a massive population. Around 70% of Bangladesh’s population lives in rural regions, making immediate access to healthcare extremely challenging. Doctors and healthcare-related services are in short supply in Bangladesh’s rural areas. For which e-Health service is very important in Bangladesh especially in rural parts of the nation. As a result, endeavors are being made to improve e-health services in Bangladesh step by step and also e-health services are being given through different portable applications. The primary purpose of this study is to examine the current condition of e-health services in Bangladesh and to identify the issues that it faces. To accomplish this goal, the main challenges of e-health services are identified, and arrangements of these issues are contemplated. An online-based survey has also been conducted to identify the current situation of e-health in Bangladesh. The aftereffects of the survey show that 70% of people know about e-Health services, 55.9% of people utilize this service regularly, and currently, 67.4% of people are satisfied with the services of e-health organizations in Bangladesh. Because of that a few challenges of e-Health services and exhortation to overcome these difficulties are given in this paper.
IMPACT OF COVID- 19 ON MENTAL HEALTH, PHYSIOLOGICAL HEALTH, NUTRITION, EDUCATION AND SLEEP
Authors: Jahan Badhan Ishrat , Sakib Roohi Nazmus , Sultana Sarina , Monirujjaman Khan Mohammad , Arifur Rahman H.M. , Dey Rajesh , Nanda Ipseeta
Published: May 2024

Coronavirus disease (COVID-19) is a newly discovered coronavirus that causes an infectious disease. It was initially discovered in Wuhan, China, in December 2019. In January 2020, the World Health Organization labeled the outbreak a Public Health Emergency of International Concern, and in March 2020, it was declared a pandemic. COVID-19 (Coronavirus) has disrupted daily life and slowed the global economy. Thousands of individuals have been impacted by this pandemic, who are either sick or dying as a result of the disease’s spread. The influence of COVID-19 on people’s mental health, physiological health, diet, education, and sleep is presented in this study report, which is based on a review and survey.The study was conducted from literature reviews and through an online survey. The primary data was collected via an online questionnaire using Google form. We have prepared 33 questions for the survey. The questionnaire consisting of several parts such as (i) basic information, (ii) impact on mental health and sleep, (iii) impact on physiological health, (iv)impact on nutrition and education. The sample size for our survey was 202. After collecting the data through survey, we analysis the data and then based on the analysis we have created 47 different graphs including pie charts, bar charts and column charts. We may learn how Covid-19 affects several aspects of our daily lives in this paper, as well as the effects of Covid-19 on our mental health, physiological health, diet, education, and sleep.
MODIFICACIÓN A LA LEY 30313 EN LOS CONTRATOS DE COMPRAVENTA PARA EVITAR EL FRAUDE INMOBILIARIO
Authors: Madrid Calderón Oscar David
Published: May 2024

La presente investigación tiene como objetivo principal es determinar de qué manera se afecta al propietario perjudicado por la falsificación de documentos y suplantación de identidad vulnerando el derecho de propiedad, realizado en la provincia de Piura. En referencia a la interrogante principal se planteó ¿Cómo limitar el ejercicio de la oposición al propietario afectado por la falsificación de documentos y suplantación de identidad se vulnera el derecho de propiedad? En lo referente a la metodología empleada se trata de una investigación de tipo descriptivo bajo un enfoque cualitativo, Complementando el aspecto metodológico las técnicas que se aplicaron fue el análisis documental, observación directa y la entrevista clasificada, realizadas a notarios y dependientes de notarías. Los instrumentos fueron la ficha técnica y el cuestionario de modalidad cerrada, bajo análisis realizado por el software SPSS 28.
CENTRO DE SALUD MENTAL COMUNITARIO: CALIDAD DE ATENCIÓN Y SATISFACCIÓN DE USUARIOS
Authors: Dávila Cossio Bertha Victoria
Published: May 2024

Esta investigación tuvo como objetivo determinar la relación que existe entre calidad de atención y satisfacción de los usuarios que acuden al Centro de Salud Mental Comunitario de Bellavista-Región San Martín. Con enfoque cuantitativo, de tipo básico, descriptivo, correlacional y diseño no experimental. La población 384 usuarios, la muestra estuvo conformada por 134 usuarios y para la recopilación de la información se empleó el cuestionario para las variables de Calidad de atención y satisfacción, valorados con la escala de Likert, corroborado por el juicio de 3 expertos. La confiabilidad del instrumento con un Alfa de Cronbach de 0,860 y 0,930 mostrando alta confiabilidad y una prueba piloto con un Alfa de Cronbach superior a 0.7 para ambas variables. Se estableció que la calidad de atención percibida por los usuarios fue regular (55%), es decir que para ellos hay una pobre atención. Respecto a satisfacción del usuario de los servicios en el centro de salud se pudo notar que un porcentaje elevado se encuentra satisfecho en promedio (46.3%). Se concluye con un Rho de Spearman de 0,365 indicando correlación significativa (Sig. <0,05) entre calidad de atención y satisfacción del usuario, por tanto, a mayor calidad de atención tendrían usuarios más satisfechos.