bluuebunny/crossref_metadata_2025 huggingface dataset:
KAJIAN ARSITEKTUR KONTEKSTUAL BENTUK PADA BANGUNAN KAMPUNG SUSUN PRODUKTIF TUMBUH CAKUNG DI JAKARTA TIMUR
Authors: Musthapha Zainal , Purwantiasning Ari Widyati Purwantiasning
Published: May 2024

ABSTRAK. Penerapan prinsip-prinsip arsitektur kontekstual, salah satunya adalah prinsip harmoni dan kontras dalam segi ukuran dapat dilihat pada suatu bangunan baru sehingga dapat diketahui dampak yang dihasilkan dengan adanya bangunan baru tersebut terhadap lingkungan sekitarnya. Dengan adanya bangunan Kampung Susun Produktif Tumbuh Cakung yang tergolong bangunan baru berdasarkan waktu diresmikannya. Diperlukan adanya suatu kajian yang menjelaskan kesesuaian antara bangunan Kampung Susun Produktif Tumbuh Cakung terhadap bangunan di sekitarnya. Penelitian ini bertujuan untuk mengidentifikasi penerapan prinsip arsitektur kontekstual dalam segi bentuk pada bangunan Kampung Susun Produktif Tumbuh Cakung. Metode yang digunakan dalam penelitian ini adalah kuasi kualitatif dengan melakukan observasi pada bangunan Kampung Susun Produktif Tumbuh Cakung untuk mengetahui kontekstualitas bangunan Kampung Susun Produktif Tumbuh Cakung terhadap bangunan di sekitarnya. Pada penelitian ini dapat diketahui bahwa Kampung Susun Produktif Tumbuh Cakung menerapkan prinsip arsitektur kontekstual teori Brolin. Kata Kunci: arsitektur kontekstual, kampung susun, ukuran, jakarta ABSTRACT. The application of contextual architectural principles, one of which is the principle of harmony and contrast in terms of size can be seen in a new building so that it can be known the impact produced by the existence of the new building on the surrounding environment. With the building of Kampung Susun Productive Tumbuh Cakung which is classified as a new building based on the time of its inauguration. A study is needed that explains the suitability of the Cakung Growing Productive Stacking Village building to the surrounding buildings. This study aims to identify the application of contextual architectural principles in terms of form in the building of the Cakung Growing Productive Stacking Village. The method used in this study is qualitative by observing the building of the Cakung Growing Productive Stacking Village to determine the contextuality of the Cakung Growing Productive Stacking Village building to the surrounding buildings. In this research, it can be seen that the Cakung Productive Susun Village applies the contextual architectural principles of Brolin's theory. Keywords: contextual architecture, bunk village, size, jakarta
Occupational Safety and Health Implementation Model in Construction Safety Management System Based on PUPR Minister Regulation Number 10 Of 2021 to Support Infrastructure Development in East Java Province
Authors: Farida Ery , Sholihah Qomariyatus , Andarini Sri , Natsir M. Halim
Published: May 2024

Purpose: This study aimed to assess the application of occupational safety and health in the construction safety management system and develop a framework for implementing it based on PUPR ministerial regulation Number 10 of 2021, to support infrastructure development in East Java Province.
 
Method: This study used a qualitative method with a phenomenological approach to gather detailed descriptions of participants' impressions, opinions, and views. It applied Alfred Schutz's approach to establish statements and causal relationships between themes. The research involved six participants and took place at the Department of Public Housing in East Java Province.
 
Results and conclusion: The results and conclusions of the research unveil (1) 8 groups of themes and meanings shaping the implementation of occupational safety and health within the construction safety management system, rooted in PUPR Ministerial Regulation Number 10 of 2021 to bolster infrastructure development in East Java Province. (2) These findings are consolidated into 8 major propositions, leading to the construction of a comprehensive model for implementing occupational safety and health aligned with PUPR Ministerial Regulation Number 10 of 2021.
 
Research implications: The findings of this study can help construction companies and policymakers in East Java Province and beyond improve safety measures. Understanding the framework developed here can lead to safer work environments for construction workers. The qualitative methods used in this research also add to the toolbox of qualitative research methods, providing effective ways to capture subjective experiences.
 
Originality/value: This study offers a unique framework for implementing safety measures in construction projects, specifically designed for the East Java Province and based on relevant regulations. By bringing together various themes from qualitative data, it presents new perspectives on applying regulatory frameworks. Additionally, the use of Alfred Schutz's approach enhances our understanding of how regulations, organizational practices, and individual experiences interact to ensure safety.
A novel surgical technique in feminizing genital reconstruction: a prospective cohort case series
Authors: Almesaibli Mohammed , A. AlSinan Tuqa , Albassam Abdulrahman , H. Alghamdi Abdullah , W. Alkhonizy Sarah , Alshenawy Omar , Gamil Meqradh Aya , A. AlSinan Nawra , Alwably Abdulnasser
Published: May 2024

Background:

Disorders of Sexual Development (DSD) encompass congenital conditions with inconsistencies between sex chromosomes, gonads, and sexual anatomy. This study aimed to evaluate the outcomes of a genitoplasty technique in DSD patients, focusing on functionality and cosmetics.

Methods:

A prospective cohort case series was conducted at a university hospital in Riyadh, Saudi Arabia. Ten DSD patients underwent genitoplasty procedures with excision of the urogenital membrane and use of the local flap of labia minora for reconstruction. Data, including demographic information, operative findings, and immediate and delayed postoperative information, were collected.

Results:

The single-stage genitoplasty technique demonstrated improved delayed cosmetic outcomes. Patients undergoing single-stage genitoplasty with excision of urogenital membrane and use of local flap of labia minora for reconstruction. This approach yielded superior long-term aesthetic outcomes, eliminating the need for additional surgeries.

Conclusion:

The new novel technique showed delayed satisfactory cosmetic outcomes compared to the previous one. Additionally, the new technique significantly reduced the need for subsequent interventions, such as second genitoplasty. These findings support the potential benefits of the new novel technique in improving long-term outcomes for individuals with DSD.
Letter to the Editor: Limited Facts from IRB Statistics on Refugee Claims
Authors: Tom Clark
Published: May 2024

Just a note to alert you and the editors of "Refuge" to the fact that the statistics from the Refugee Board are limited and can misrepresent the situation.
Una nueva dimensión del análisis del lenguaje: una posición nueva de las ciencias humanas
Authors: Martínez María Cristina
Published: May 2024

Resumen
El inglés americano y el Británico desde el punto de vista de sus hablantes nativos y no nativos: Un estudio de actitudes y diferencias lingüísticas
Authors: Cárdenas Ramos Rosalba
Published: May 2024

Resumen
Comunicación y educación (Entrevista)
Authors: Eduteka
Published: May 2024

Resumen
Comunicarse es "negociar sentidos"
Authors: Eduteka
Published: May 2024

Resumen
Gramática y comunicación
Authors: Oviedo Tito Nelson
Published: May 2024

Resumen
Educación: Lenguaje y constitución de sujetos sociales
Authors: Oviedo A. Tito Nelson
Published: May 2024

Resmen
Acción pedagógica en la lengua materna
Authors: Oviedo A. Tito Nelson
Published: May 2024

Resumen
Estudios del lenguaje en Colombia. Los Congresos del área:1968-2002
Authors: Arboleda Toro Rubén
Published: May 2024

Resumen
Perencanaan Penimbunan Disposal Penambangan Batubara Pit Ulakpandan Utara di PT Bumi Merapi Energi, Lahat, Sumatera Selatan
Authors: Saputra Aditya , Azizi Masagus Ahmad , Nugroho Bani , Putra Danu , Marwanza Irfan
Published: May 2024

Lokasi dari disposal pit Ulakpandan Utara, PT Bumi Merapi Energi berada di daerah bekas tambang yang sudah tergenang air hingga elevasi 70 di pit Ulakpandan Selatan. Dibutuhkan perencanaan penimbunan overburden yang aman dan jauh dari genangan air untuk bulan April hingga bulan Juni tahun 2021. Dibuat perencanaan penimbunan disposal meliputi geometri rancangan timbunan, geometri jalan angkut minimum, serta jumlah alat gali-muat dan alat angkut yang akan digunakan. Metode penimbunan dilakukan dengan metode semi induce dan square pattern finger disposal. Dengan tipe tumpukan valley fills dan sidehill fills. Proses pemindahan material overburden untuk mencapai target produksi membutuhkan 2 unit excavator dan 16 unit dump truck dengan lebar jalan angkut minimum 21 meter untuk 2 jalur pengangkutan. Kapasitas dari rancangan overburden bulan April 2021 sebesar 429.843 BCM, Mei 2021 sebesar 414.913 BCM, dan Juni 2021 sebesar 479.530 BCM.
توسع الصناعات الاستخراجية واثارها على الاراضي الزراعية في قضاء المقدادية
Authors: عطية اللهيبي صدام مزهر
Published: May 2024

نظراً لأهمية الاراضي الزراعية وخصوبتها في منطقة الدراسة ، وشهرة المنطقة بإنتاج محاصيل الحمضيات بمختلف انواعها اذ اطلقت عليها تسمية (ام البرتقال) وانتاج الرمان ومختلف انواع التمور وغيرها من المحاصيل الزراعية الاخرى ، الا ان النشاط الزراعي قد تدهور وتراجع انتاجه بعد احداث عام (2014 م) التي كان لقضاء المقدادية نصيباً منها ، اذ تعددت وتوسعت الصناعات الاستخراجية (مقالع) بعد تلك الاحداث في قضاء المقدادية بصورة ملفتة وكبيرة على حساب مساحة الاراضي الزراعية ، مما تتطلب الحاجة لأجراء العديد من الدراسات للحد من هذه المشكلة التي لها مخاطر كبيرة على النشاط الزراعي في منطقة الدراسة ، اذ تناول البحث اسباب توسع هذه الصناعات في المنطقة  ، والتوزيع الجغرافي لمعامل الحصى والرمل واماكن تركزها على الخارطة ، ثم دراسة الجدوى الاقتصادية لتلك الصناعات وتكاليف انشاء معامل انتاج الحصى والرمل ، واوضحت الدراسة اهم الاثار السلبية للصناعات الاستخراجية في منطقة الدراسة ، ثم اوضح الدراسة أهم ما توصلت اليه والاستنتاجات واقترح بعض التوصيات للمساهمة ولو بجزء بسيط من الحلول للحد من توسع هذه المشكلة والحفاظ على النشاط الزراعي في منطقة الدراسة ، واختتمت الدراسة بتوضيح اهم المصادر التي تم الاعتماد عليها لدراسة المشكلة .
العنف المدرسي وعلاقته بالتأخر الدراسي لدى تلاميذ المرحلة الابتدائية
Authors: مهدي نغم سعيد
Published: May 2024

يهدف البحث الحالي التعرف على مستوى العنف المدرسي لدى تلاميذ المرحلة الابتدائية والتعرف على مستوى التأخر الدراسي لدى تلاميذ المرحلة الابتدائية والكشف عن العلاقة بين العنف المدرسي والتأخر الدراسي . اقتصر البحث الحالي على تلاميذ المرحلة الابتدائية الصباحية/تكريت/ للعام الدراسي (2018-2019).اعدت الباحثة اداتين , احدهما مقياسا للعنف المدرسي تكون بصورته النهائية من (30) فقرة , ضمن ثلاثة مجالات هي (المجال البدني , المجال اللفظي والمجال المادي) , كما اعدت الباحثة مقياس التأخر الدراسي تكون بصورته النهائية من (48) فقرة , ضمن ثلاثة مجالات هي (أسباب تتعلق بالأسرة , أسباب تتعلق بالتلميذ , أسباب تتعلق بالمدرسة) بينت نتائج البحث ان مستوى العينة في مقياس العنف المدرسي هو مستو عال وفي مجالات المقياس ما عدا المجال المادي , وان مستوى العينة في مقياس التأخر الدراسي هو مستو واطئ .ووجود علاقة ارتباطية موجبة بين العنف المدرسي والتأخر الدراسي .
The Effects of Textual Input Enhancement and Inputflooding on the Comprehension and Retention of Macro/ Micro Discourse Markers Functions among Iraqi University EFL Students
Authors: Salih Sana’Khalifa
Published: May 2024

Discourse markers (DMs) are essential for improving the quality of speaking and writing as well as increasing comprehension of spoken and written text. This research aims at investigating the effects of two techniques (textual input enhancement and inputflooding) on students' comprehension and retention of macro/ micro discourse markers functions. 96 EFL University students were randomly chosen from a population of 120 students. The study subjects were split into two experimental groups and one control group and they took part in 8 sessions to teach them L2 DMs, by using two techniques, i.e., textual input enhancement and inputflooding. The students are tested before and after the sessions by the comprehension test of DMs functions. The outcomes showed that all two experimental groups did better than the control group in their post-tests. Moreover, the findings indicated a significant difference in the comprehension test between the two experimental groups in favour of the textual input enhancement group. Moreover, the performance of the Textual Enhancement group on the DMs Posttest is somewhat close to its performance in the retention test. On the other hand, the statistically significant effect of the inputflooding technique on the DMs Posttest is greater than its effect on the retention test. It is recommended to use input enhancement techniques to help the EFL students to master L2 materials effectively.
CORROSION RESISTANCE OF ZINC GALVANIC DEPOSITS OBTAINED BY THE ELECTROCHEMICAL 3D PRINTING METHOD
Authors:   National Technical University of Ukraine “Igor Sіkorsky Kyiv Polytechnic institute”, Kokosha Anna , Uschapovskyi Dmytro ,   National Technical University of Ukraine “Igor Sіkorsky Kyiv Polytechnic institute”, Vorobyova Viktoriya ,   National Technical University of Ukraine “Igor Sіkorsky Kyiv Polytechnic institute”, Motronyuk Tetiana ,   National Technical University of Ukraine “Igor Sіkorsky Kyiv Polytechnic institute”, Vasiliev Georgy ,   National Technical University of Ukraine “Igor Sіkorsky Kyiv Polytechnic institute”
Published: May 2024

The article is devoted to the implementation of the process of electrochemical 3D printing of zinc products and the determination of the effect of the methodof their production on corrosion resistance. The possibility of electrochemical 3D printing of zinc objects with a fine-crystalline compact structure using high-speed sulfate plating electrolyte has been shown. The most resilient and elastic zinc depositswere obtained in the electrolyte without the addition of organic additives and when gelatin was added to the electrolyte. The use of naphthalene disulfonic acid of 1,5-disodium salt made it possible to obtain the most finely crystalline and semi-glossy zinc deposits, but the fragility of the deposits increased somewhat. Conducted studies of the corrosion resistance of printed zinc objects showed that the use of electrochemical 3D printing as a method of obtaining and introducing organic additives into the electrolyte does not lead to a decrease in the corrosion resistance of the metal
Three Decades of Panchayati Raj: An Unfinished Journey
Authors: Balan P.P.
Published: May 2024

No abstarct.
Acute Kidney Injury in Chronic Liver Disease in Northwest India: Still a Battle to Conquer
Authors: Saxena Disha , Yadav Manoj , Kumar Tarun , Sharma Sanjeev , Beniwal Pankaj , Malhotra Vinay , Agarwal Dhananjai , Nijhawan Sandeep
Published: May 2024

Background:

Patients with cirrhosis are susceptible to development of acute kidney injury (AKI), which leads to poor outcome. We conducted a study to evaluate the spectrum of AKI in patients with cirrhosis.

Materials and Methods:

This study was conducted in consecutive cirrhotic patients with AKI admitted in a tertiary care center of India from April 2020 to December 2022. Details including history, examination findings, and results of laboratory investigations were recorded.

Results:

A total of 243 patients were enrolled in this study. The majority (91.3%) of the patients were males. The most common etiology of cirrhosis was alcohol in 58.4% (n = 142) followed by hepatitis B in 10.3% (n = 25) of patients. Pre-renal form of AKI was present in 54.4% (n = 132) of patients and hepatorenal syndrome (HRS) in 21.8% (n = 53) of patients. IgA nephropathy was the commonest (n = 6) glomerular pathology in nonresponders with intrinsic renal disease. Majority of the patients belonged to stage II (46.9%) and stage I AKI (37%), while only 16.1% had stage III AKI. Various stages of AKI showed a significant correlation (P < 0.05) with Child–Turcotte–Pugh (CTP) score and Model for End-stage Liver Disease (MELD)-Na score. The overall in-hospital mortality rate was found to be 18.5% (n = 45).

Conclusion:

Renal dysfunction is a frequent complication among cirrhotic patients. Pre-renal factors were the most common cause of AKI in cirrhotics. Stages of AKI showed significant correlation with liver prognostic scores. Renal biopsy should be considered in patients not responding to treatment, to guide further management.
Cognitive Dysfunction Screening in Peritoneal Dialysis Patients: A Cross-Sectional Study
Authors: Brás Ana C. , Marques Joana , Fernandes Vasco , Ferreira Ana C.
Published: May 2024

Background:

Mild cognitive impairment (MCI) in peritoneal dialysis (PD) patients has been described as a risk factor for worse outcomes such as peritonitis, technique failure, and mortality. In this study, we aimed to determine the prevalence of MCI in a population of PD patients and identify the possible risk factors associated with MCI.

Materials and Methods:

We performed an observational, cross-sectional study to evaluate cognitive function using the Montreal Cognitive Assessment (MOCA) test and the Mini Mental State Examination (MMSE) test in PD patients. Patients with diagnosis of dementia or severe neurologic impairment, active cancer, or infection were excluded.

Results:

We evaluated 66 patients (mean age 60 years); 53% were male. Prevalence of MCI assessed by MOCA test and MMSE test was 65% and 33%, respectively. Predictors of MCI with MOCA test were higher age (P = 0.0001), lower education level (P = 0.005), need of a helper (P = 0.009), and continuous ambulatory PD modality (P = 0.019). Higher Charlson comorbidity index (P = 0.002), coronary artery disease (P = 0.006), and peripheral artery disease (P = 0.033) were also associated with MCI. Lower Kt/V (P = 0.012) and lower levels of normalized protein catabolic rate (nPCR; P < 0.000) were related to MCI. MCI patients had more episodes of peritonitis (P = 0.047). Multivariable analysis showed that lower education, Kt/V, and nPCR were the most relevant factors connected to MCI (P = 0.029, P = 0.037, and P = 0.019, respectively).

Conclusion:

In our PD population, MCI was detected in more than half of the patients. Patients with MCI were older, had lower education level, more disease burden, and higher risk for developing peritonitis. Lower Kt/V and nPCR levels were associated with MCI.
Clinical Audit of Assisting Renal Biopsy Procedure Performed in Nephrology Unit of a Tertiary Care Hospital with a View to Develop Standard Nursing Procedure Protocol
Authors: Thakur Mamta , Mawar Shashi , Murry Lumchio Levis , Sharma D.K.
Published: May 2024

Background:

Renal biopsy is one of the most commonly performed diagnostic procedures in the nephrology unit. Nurses play a very important role in pre-biopsy preparation, assisting during procedure and post-biopsy care. Nursing care provided during or after renal biopsy is of utmost importance in reducing complications. The study aims to perform a clinical audit of nursing practices to find the gaps in existing practices for the procedure of assisting renal biopsy and to develop standard protocol.

Materials and Methods:

This descriptive observational study was conducted on 19 nurses who were working in the nephrology unit of the tertiary care center. They were enrolled through total enumerative sampling. Sociodemographic profile and clinical profile were collected. The observation checklist was formed based on standard nursing practices, which included three dimensions for the procedure of assisting renal biopsy. Based on the gaps identified, a standard protocol was developed. Nurses were observed during two shifts and each nurse was observed once. Scoring of items was done in each dimension and for acceptable practices, nurses have to score ≥80% in each dimension. Data were analyzed using descriptive statistics.

Results:

The majority of nurses (73.7%) have not undergone any special training in nephrology. None (100%) showed an acceptable level of nursing practices for all the dimensions of assisting renal biopsy procedure. Standard protocol was developed by the researcher following a rigorous process.

Conclusion:

The clinical audit found that there were gaps in the existing nursing practices for the procedure of assisting renal biopsy and these gaps have been addressed by the development of a standard protocol.
THE VALIDITY OF CUBE AND BLOCK MATERIAL LEARNING DEVICES USING A REALISTIC MATHEMATICS EDUCATION (RME) APPROACH
Authors: Eka Fuji Astuti  , Sri Rezeki
Published: May 2024

Learning devices are tools designed by teachers to facilitate teachers in carrying out the learning process so that they can support the achievement of the expected success of learning activities. The purpose of this development research is to produce learning device products in the form of Learning Implementation Plans (RPP) and Student Worksheets (LKPD) on valid flat-sided geometric shapes using the Realistic Mathematics Education (RME) approach. This type of research is development research with the ADDIE model, which has been modified into three stages (Analysis, Design, and Development) without the Evaluation and Implementation stages. The instrument for collecting research data is learning device validation sheets in the form of lesson plans and worksheets. The data analysis used is descriptive data analysis which describes the level of validity of the product with data obtained from the results of validation by four experts. Validation activities were carried out in Pekanbaru City from August 5, 2020, to September 2, 2020, with the research results obtained in the form of an RPP validation result of 96.09 with very valid criteria and an LKPD validation result of 90.52 with very valid criteria.
Community empowerment for reducing the risk of peatland fires in the wetland area of South Kalimantan
Authors: Arisanty Deasy , Hastuti Karunia Puji , Rajiani Ismi , Rosadi Dedi , . Syahril
Published: May 2024

Fires that continue to occur in the dry season, cause fire management to be carried out immediately. Community empowerment in fire suppression is essential to improve. This study analyzes community empowerment in fire management in fire-prone peatland areas in South Kalimantan, Indonesia. The number of samples in this study was 250 people directly involved in empowerment activities in fire-prone areas. There are 37 questions about physical capital, social capital, human capital, ability in empowerment, empowerment process and community empowerment—data analysis using Structural Equation Modeling (SEM). The results show that physical capital, social capital and empowerment capabilities have not formed communities that can make decisions and are independent in combating peatland fires. Community empowerment programs are limited to volunteer groups and do not cover all community groups.
Bioremediation of Thiourea in an Aqueous Medium using Fungal Strain isolated from Industrial Soil Sample
Authors: Kwatra Nancy , Jose S. Sijo , Chacko Jacob Subin , Chakraborty Pritha , Abraham Jayanthi
Published: May 2024

Thiourea (sulfhydryl compound), a nitrification inhibitor is one of the widely used chemicals in industries that has led to contamination of soil and water. It is of utmost concern that all the traces of thiourea be eliminated from the tainted surfaces. In the present study, a bioremediation process was employed and the fungal strain from contaminated industrial soil was isolated using enrichment technique. Growth kinetics of the isolated fungal strain was observed to assess the efficiency of thiourea utilization. The results of the HPLC analysis confirmed that the strain could mineralize thiourea within 7 d of incubation. The shift in vibrational frequencies was reported in the infrared spectrum of the degraded sample as compared to the standard. The absence of adsorption bands for the functional group of thiourea in the spectrum of degradation sample infers the breakdown of the molecule. The findings of the study indicate that the strain Aspergillus sp. may be employed for the elimination of thiourea and its residues from contaminated surfaces.
Hot Stellar Populations of Berkeley 39 Using Swift/UVOT
Authors: Chand Komal , Rao Khushboo Kunwar , Vaidya Kaushar , Panthi Anju
Published: May 2024

Open clusters are excellent tools to probe the history of the Galactic disk and properties of star formation. In this work, we present a study of an old age open cluster Berkeley 39 using the observations from UVOT instrument of the Neil Gehrels Swift observatory. Making use of a machine learning algorithm, ML-MOC, we have identified a total of 861 stars as cluster members out of which 17 are blue straggler stars. In this work, we present a characterisation of two blue straggler stars. To estimate the fundamental parameters of blue straggler stars and their companions (if any), we constructed spectral energy distributions using UV data from Swift/UVOT and GALEX, optical data from Gaia DR3, and infrared (IR) data from 2MASS, Spitzer/IRAC, and WISE. We find excess flux in UV in one blue straggler star, implying the possibility of a hot companion.
ИСТОРИЯ ОСВОЕНИЯ И КОНФЛИКТЫ ПРИРОДОПОЛЬЗОВАНИЯ: НЕГАТИВНЫЕ ПОСЛЕДСТВИЯ И ВОЗМОЖНОСТИ РЕКУЛЬТИВАЦИИ
Authors: Голубева Е.И. , Глухова Е.В. , Зимин М.В.
Published: May 2024

В статье на примере прибрежных экосистем Терского берега Белого моря в устье р. Варзуги рассматриваются основные причины их деградации и эффективность рекультивации нарушенных земель. В основу анализа положены результаты исследования современного состояния нарушенных территорий и этапы восстановления растительного покрова. Деградация земель связана преимущественно с длительной историей освоения региона, различными видами традиционного природопользования и их интенсивностью. При полевых исследованиях состояния формирующихся на месте песчаных массивов сосновых лесов использованы различные географические методы - фитоценотические, морфометрические, биогеохимические. Результаты исследования позволили дать оценку состояния насаждений и эффективность процесса фиторекультивации.
ИССЛЕДОВАНИЕ АДАПТИВНОГО КОНТУРА УПРАВЛЕНИЯ ВОЛНОВЫМ ТВЕРДОТЕЛЬНЫМ ГИРОСКОПОМ В РЕЖИМАХ ДАТЧИКА УГЛА И УГЛОВОЙ СКОРОСТИ
Authors: Тюнин А.Н. , Беляков В.В.
Published: May 2024

В работе решаются задачи разработки алгоритмов управления волновым твердотельным гироскопом (ВТГ) в режиме датчика угла (ДУ) и угловой скорости (ДУС), с последующим объединением в адаптивный контур управления, позволяющий совершать переключение между данными режимами работы. Разработан алгоритм переключения режимов работы ВТГ. Проведено моделирование работы ВТГ в режимах ДУС, ДУ и адаптивного контура. Предложенные технические решения позволяют повысить точность измерения угловой скорости и угла поворота, а также значительно уменьшить потерю данных от влияния переходных процессов.
Virtual Variables as Powerful and Reliable Parameters to Predict Experimentally Unobservable Reactions in Organic Synthesis
Authors: TAKEDA Kazuhiro , OHTSUKA Naoya , SUZUKI Toshiyasu , MOMIYAMA Norie
Published: May 2024

This study introduces a novel machine learning algorithm designed to assist in the development of organic reactions in organic synthesis. The algorithm addresses the complexities inherent in batch-type organic reactions, including the necessity for numerous experiments and the effects of intricate characteristics of reaction pathways. By integrating molecular relationships and actual yields from observable reactions, the algorithm estimates virtual yields through extrapolation. A Bayesian optimization-based approach is employed to compute expected values and evaluate plausibility. The algorithm’s dual-loop structure, incorporating virtual variables and experimental values, maximizes the coefficient of determination. Physicochemical aspects of the algorithm are validated using natural bond orbital charges, and its utility in synthesizing perfluoro iodinated naphthalenes is demonstrated. The algorithm exhibits potential for predicting experimentally unobservable reactions, thereby advancing organic chemistry.
An Interdisciplinary Study of Perceptions, Efficacy, and Adaptation in Pandemic Pedagogy Supported by the Institutional Data Lake
Authors: Han Jia Yi , Pua Min Xin , Fung Fun Man
Published: May 2024

The COVID-19 pandemic forced a sudden shift to online learning in Physics and Chemistry in Singapore. As restrictions eased, researchers explored its impact through interviews with instructors and analysis of student data made available through a data lake managed by the National University of Singapore’s Institute for Applied Learning Sciences and Educational Technology. Interviews focused on instructor adaptation and beliefs about online teaching, while the data investigated student perceptions and changes in teaching efficacy pre- and post-pandemic.
Organic Ionic Plastic Crystal/PVDF Composites Prepared by Solution Casting
Authors: Wang Yanyu , Rochefort Dominic
Published: May 2024

Solid-state electrolytes have been considered as a promising candidate to address the safety issues for next-generation lithium batteries. Organic ionic plastic crystals (OIPCs) are attracting increasing interest as solid electrolyte materials due to their unique advantages. In this study, an OIPC-based composite electrolyte consisting of the OIPC 1-ethyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Pyr12TFSI), lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) and the polymer polyvinylidene fluoride (PVDF) has been developed by a facile solution casting strategy. Free-standing and flexible OIPC/polymer composite membranes were fabricated by the solution casting method, which not only provides flexibility and better electrode/electrolyte contact, but also is more compatible with current battery processing methods. The thermal behavior and ionic conductivity of the OIPC-based composites with different molar proportions (10 mol% to 67 mol%) of LiTFSI in LiTFSI/Pyr12TFSI as well as different weight fractions (20 wt% to 50 wt%) of PVDF were studied to understand the effect on transport properties. Among all the compositions studied, the Li0.33Pyr0.67TFSI/30wt%PVDF composite exhibited high ionic conductivity (e.g. 1.2 × 10−4 S cm-1 at 30 °C). The Li0.33Pyr0.67TFSI/30wt%PVDF composite membrane was evaluated in Li/Li symmetric cell and was cycled stably over 900 h at a current density of 0.1 mA cm−2 at 50 °C, demonstrating that this OIPC/polymer composite electrolyte enabled the reversible and stable lithium plating and stripping behaviors. Further tests of the Li0.33Pyr0.67TFSI/30wt%PVDF composite membrane as solid electrolyte in LiFePO4/Li cell presented a high specific capacity of 149 mAh g−1 at 0.1 C and a long cycle life of over 440 cycles with capacity retention of 89% at 0.5 C at 50 °C, which showed improved rate capability and cycling stability in comparison with the composites with similar compositions but obtained by powder pressing method. This study demonstrated the potential of the OIPC/polymer composite solid electrolyte prepared by solution casting method and will promote the development of high-performance OIPC-based composite electrolytes for solid-state batteries.
Conjugated Small Molecules: A Promising Hole Transport Materials in Perovskite Photovoltaics
Authors: Martynov Ilya , zhivchikova aleksandra , Tereshchenko Mikhail , Kuznetsov Iliya , Tepliakova Marina , Akkuratov Alexander
Published: May 2024

There is a resurgence in the use of triphenylamine-based donor materials (TPA) in the field of perovskite photovoltaics. This work presents the synthesis of two novel conjugated small molecules (CSM's), TPA-t and TPA-t EH, which are functionalized with triisopropylsilyl groups and 2-ethylhexyl side chains. These molecules show promise as hole transport materials, which possess high hole mobilities of 1.5 × 10-4 and 2.9 × 10-3 cm2 V−1 s-1 due to self-organization. TPA-t and TPA-t EH possess HOMO energy levels at -5.38 and -5.31 eV, which is well-aligned with valence band of standard perovskite MAPbI3.This resulted in outstanding open-circuit voltages of 1100 and 1080 mV. TPA-based molecules were investigated as HTLs in n-i-p PSCs without additional doping and enabled high efficiency (17.4 %) same as for devices with state-of-the-art polytriarylamine (PTAA) HTL. The obtained results suggest that developed materials could potentially compete with PTAA when further material structure modification.
Identifying Key Properties that Drive Redox Mediator Activity in Lactiplantibacillus plantarum
Authors: Blackburn Benjamin T. , Alba Robyn A. C. , Porokhin Vladimir O. , Hatch Arden , Hassoun Soha , Ajo-Franklin Caroline M. , Mevers Emily
Published: May 2024

Lactiplantibacillus plantarum is known to utilize exogenous small molecule quinone mediators to perform extracellular electron transfer (EET), which allows it to produce a detectable current in a bioelectrochemical system. Utilization of quinone mediators by L. plantarum requires a type-II NADH dehydrogenase (Ndh2), however small structural variations in the core of 1,4-naphthoquinone EET mediators yields significantly different current outputs. Herein, we assembled a library of 30 naphthoquinone-based EET mediators in order to probe the important physicochemical properties and biochemical interactions that are responsible for Ndh2-dependent EET in L. plantarum. The library was designed with inspiration from naturally-occurring metabolites, and was assembled focused on structural modifications that diversified polarity (cLogP), reduction potential (Eo), and Ndh2 binding affinity as these properties are hypothesized to be driving EET activity. In general, Ndh2-dependent EET activity in an iron(III) oxide nanoparticle assay significantly correlates to the mediator's polarity and binding affinity. Five mediators were analyzed in BESs with L. plantarum and each generated Ndh2-dependent current with low background signal. Importantly, the amine containing mediators yielded incredibly stable current output over the course of the experiment (up to 5 days). These findings increase our understanding of structure-activity relationships for quinone-mediated EET and provide mediators for bioelectronic sensing.
Interfacial Water Structural Entropy as the Descriptor for pH-dependent HOR/HER Activity on Pt
Authors: Oliveira Nicholas , Yan Yushan
Published: May 2024

The transition to renewable energy and variability in solar and wind production rates necessitates the use of an energy intermediary, well suited to acid based electrolyzer and fuel cell devices in an idealized hydrogen economy. However, high material costs have motivated a transition to alkaline based devices, exposing pH dependent performance losses on traditionally ideal catalysts. Understanding reduced hydrogen oxidation and evolution (HOR/HER) activity on platinum with increasing pH is essential from both a fundamental electrocatalysis perspective to the engineering of electrochemical interfaces. Here we show that reducing electrolyte water structural entropy (SStr) to promote hydrogen bonding with benzyl tri-alkylammonium cations and dibenzo crown ethers improves HOR/HER kinetics in 0.1 M KOH by 25%. In situ surface enhanced infrared spectroscopy verifies strengthened water hydrogen bonding through increased ν(O-H) stretching bands between 3000 and 3200 cm-1. Hydrogen bonding allows for facile transfer of H+/OH- between the electrolyte bulk and interface through the Grotthuss mechanism. Our results show that SStr is the descriptor for HOR/HER kinetics and engineering it through substitution and conversion of structure breakers or incorporation of structure makers, can increase HOR/HER kinetics.
Metis - A Python-Based User Interface to Collect Expert Feedback for Generative Chemistry Models
Authors: Menke Janosch , Nahal Yasmine , Bjerrum Esben Jannik , Kabeshov Mikhail , Kaski Samuel , Engkvist Ola
Published: May 2024

Current de novo drug design models face one crucial challenge: a disparity between the user’s expectations and the actual output of the model in practical applications. Tailoring models to better align with chemists’ preferences is key to overcoming this obstacle effectively. While interest in preference-based and human-in-the-loop machine learning in chemistry is continuously increasing, no tool currently exists that enables the collection of standardized and chemistry-specific feedback. Metis is a Python-based open-source graphical user interface (GUI), designed to solve this and enable the collection of chemists’ detailed feedback on molecular structures. The GUI enables chemists to explore and evaluate molecules, offering a user-friendly interface for annotating preferences and specifying desired or undesired structural features. By providing chemists the opportunity to give detailed feedback, allows researchers to capture more efficiently the chemist’s implicit knowledge and preferences. This knowledge is crucial to align the chemist’s idea with the de novo design agents. The GUI aims to enhance this collaboration between the human and the "machine" by providing an intuitive platform where chemists can interactively provide feedback on molecular structures, aiding in preference learning and refining de novo design strategies. Metis integrates with the existing de novo framework REINVENT, creating a closed-loop system where human expertise can continuously inform and refine the generative models.
The Effects of Transactional Barriers on the Effectiveness of a Firm’s Competitive Strategy
Authors:   NHH Norwegian School of Economics, Norway, Obu Osiebuni , Ukpere Wilfred ,   University of Johannesburg, South Africa
Published: May 2024

Extant literature has shown that firms’ decisions can exert a bearing on the effectiveness of their competitive strategy. This paper seeks to extend this body of literature by demonstrating how and under what circumstances a firm’s decision about transactional barriers, which it can impose on its customers, can impact the degree to which it can effectively deploy its competitive strategy in realizing its maximum possible profits. The study’s main findings demonstrate that at equilibrium, the size of the set transactional barrier is on average inversely related to the effectiveness of the firm’s competitive strategy, holding constant the consumers' income and other factors. Furthermore, the effectiveness of the firm’s competitive strategy in attaining the firm’s optimal profits is jointly and individually enervated by the price elasticity of the firm’s product demand and the size of the transactional barrier that it imposes on its customers. Additionally, the effectiveness of the firm’s competitive strategy tends to be maximized as the size of the transactional barrier tends to be zero. Therefore, the findings in this paper suggest that under the assumptions of the model in this paper, the optimal size of a transactional barrier to be imposed by a firm, in the service industry, should be zero.
The Impact of Heating Systems on Society and Nature New Opportunities Based on Blockchain Technology
Authors:   The Bucharest University of Economic Studies, Romania, Dinu Daniel Gabriel , Mihoreanu Larisa ,   The Bucharest University of Economic Studies, Romania, Stoian Karadeli Andreea ,   The University of Texas Rio Grande Valley
Published: May 2024

The paper assesses the importance of the models used to determine the efficiency and the environmental impact of the heating products like heating pumps (HP). An appropriate model of evaluation may help identifying the presence of greenhouse gases and reducing their influence. The paper's novelty resides in the way the hidden sides linked to greenhouse gases' presence, are identified, and eliminated. The research methodology considers an environmental model linked both to the Global Emission Model for Integrated Systems on energy efficiency indicators and to the break-even analysis for greenhouse gases. The model gives hints on reducing the high costs to upgrade the living conditions in residential buildings. The results illustrate the environmental and societal impact and the social potential and highlight the technical implications for such operating systems. They incite optimizing the Heat Hybrid Pumps' design within decentralized energy systems to strengthen energy networks' flexibility and the environmental convenience. The research straightens out the understanding of heat pumps mechanisms, delineates the efficiency of their increasing use through the block-chain technology outlining its future potential for people and society's health and benefit.
Sustainability in the Consumption of Luxury Products: An Analysis of Social implications
Authors:   National University of Science and Technology Politehnica, Bucharest, Romania, Roibu Stefania-Cristina
Published: May 2024

This study aims to demonstrate whether consumers seek to raise their social status by purchasing products sold at a high price. Also, the reason why customers of luxury companies prefer to buy them despite competitors with a lower price on the market.The purchase of premium products is influenced by the desire to change social status by expressing one's personality and the need for inclusion in various interest groups.Awareness of the fundamental reasons on which decisions are made to purchase goods can be used both for marketing strategies and as a strategy for the long-term economic and social sustainability of a company on the market.
ANALYSIS AND SIMULATION OF ISOLATED BIDIRECTIONAL SNUBBERLESS CURRENT FED SOFT SWITCHING DUAL ACTIVE BRIDGE DC-DC CONVERTER FOR FUEL CELL ELECTRIC VEHICLES
Authors: Kumar Pankaj , Kumar Abhishek , Singh Madhu
Published: May 2024

In this paper, we propose a Isolated Bidirectional Snubberless Current Fed Soft Switching Dual active Bridge DC-DC Converter. This converter eliminates the requirement for active-clamp circuits by using zero-current commutation to naturally clamp the voltage across the primary-side devices. During this switching, the primary and secondary sides of the converter switched at zero current and zero voltage, respectively, reducing switching losses. The voltage across primary-side devices is independent of duty cycle and capped at a relatively low reflected output voltage with variable input voltage and output power, allowing the use of semiconductor devices with low voltage ratings. We also employed a duty cycle of 80% on the primary side and 20% on the secondary side of the converter . The advantages of this converter make it a good fit for fuel cell cars, dc-dc power conversion for energy storage, and fuel cell inverters. We obtained a theoretical graph and confirmed it using MATLAB Simulink in this model.
A REVIEW ON ANCILLARY SERVICES IN INDIAN DEREGULATED POWER SYSTEM
Authors: Kumar Sinha Abhishek , Sahay Shuvam , Kumar Niranjan
Published: May 2024

Frequency, Voltage and Grid Integrity are the key parameters of an efficient management of grid, traditionally it was the job of the vertically integrated utility. Therefore, at the time of planning for network expansion sufficient resources were organised for the ancillary requirements. To develop competition between the various GENCOs and DISCOs utilities, the vertically integrated utility has been unbundled and the transmission lines have been kept as a natural entity with monopoly. In the restructured system the parameters such as Frequency, Voltage and Grid Integrity are called Ancillary Services, which is entrusted with the System Operator, for keeping these parameters within limits by procuring the services from various GENCOs and TRANSCOs under the guidance of Electricity Regulatory Authorities.
HYBRID ENERGY STORAGE SYSTEM TECHNIQUES UTILIZING ARTIFICIAL NEURAL NETWORK
Authors: Prakash Bihari Shiv , Gupta Vikalp , Gupta Aruvand , Singh Rambir , Kumar Babul Abhinav
Published: May 2024

In this study, we look into and put into practise methods for constructing a HESS for Electric Vehicles, which is important to the proper operation of electric vehicles. The rising usage of electricity has given rise to recommendations and significant projects to enhance energy efficiency in a wide range of activities, from manufacturing to trade, transportation to modern communications, entertainment to PCs and small devices. An essential innovation for lowering energy use is the ability to store any surplus electrical energy for lengthy periods of time and subsequently retrieve it profitably. This is analyzed and examined in MATLAB Simulink from the standpoint of EVs, primarily for hybrid energy storage systems. A Li-ion battery and a super capacitor are included in the proposed HESS for charging the electric car. To improve the outcomes gained utilizing PI controlled approaches, the control system is created with Artificial Neural Networks. It minimizes the system’s calculation complexity by lowering the Kp and Ki calculations. The neural network enhances the system’s self-learning capability while also improving it by decreasing any irregularities.
PERTURBATION AND OBSERVATION RELIANT MPPT FOR A PMSG WIND TURBINE
Authors: Gupta Aruvand , Prakash Bihari Shiv , Gupta Vikalp , Kumar Sadhu Pradeep , Kumar Babul Abhinav
Published: May 2024

The proposed research examines into a P&O (Perturbation and Observation) driven MPPT (Maximum Power Point Tracking) mechanism for a WT (wind turbine). In this analysis, wind turbines have three input signals: wind speed, pitch angle, and speed of generator. The PMSG (Permanent Magnet Synchronous Generator) model is employed to estimate the speed of generator, which functions as a generator when mechanical torque is negative and as a motor when mechanical torque is positive. The output of the PMSG is three AC supply, each of which has its voltage and current monitored, as well as its power. The generator’s AC output is corrected utilizing a universal bridge component that is already incorporated in MATLAB. A boost converter is also installed to enhance the rectified DC voltage. The current and voltage in DC are monitored, and the power is estimated. The MPPT controller, DC-DC Boost Converter (DBC), and current control are all thoroughly discussed. The performance of the suggested MPPT algorithm is proven employing experimental performance of the system running during constant wind patterns.
NOVEL SMART SOLAR SYSTEM BASED UMBRELLA DESIGN
Authors: Monirujjaman Khan Mohammad , A Tasnim Noor , Bhatacharjee Madhurima , habibur Rahman Kazi Md , Arifur Rahman H.M. , Dey Rajesh , Nanda Ipseeta
Published: May 2024

A novel smart umbrella design is presented in this paper. We developed a new umbrella with smart features. Solar power is used to run our devices. After completing this system, a new umbrella has been developed with a fan, USB charger, flash light, and GPS system. The novel smart umbrella will be very helpful for people.
AN ECO-FRIENDLY AND FREE ENERGY POWERED ROAD CLEANING MACHINE
Authors: Monirujjaman Khan Mohammad , Shahbaz Shoaib , Imran Hossain MD. , Islam Kaisarul , Dey Rajesh , Nanda Ipseeta , Bhattacharya Ananyo
Published: May 2024

Effective cleaning and disinfecting help ensure the wellbeing of individuals. In Bangladesh, roads are polluted by people who spend most of their time travelling. Every day, these roads are covered with bread roll covers, cold beverage bottles, and so on. Moreover, it is important to clean the transport stands and railroad stations at regular intervals. There is no single cleaning strategy that is used for all areas. Viable cleaning relies on the cleaning gadget, and the cleaning method. Cleaning work can be hard work for individual labour, and there is a need to create effective strategies. As of late, automated cleaning gadgets are getting more mainstream. This paper presents the design of an eco-friendly sun based and battery-controlled street cleaning machine in a human-fueled cart van. To keep any kind of street clean adequately and proficiently, the cleaning van will be of great assistance to street cleaners. Moreover, the van can reach places where a big cleaning truck cannot reach due to challenging road conditions. This design focuses on cost effectiveness and ease of use. A prototype is made to showcase the potential of the design.