bluuebunny/crossref_metadata_2025 huggingface dataset:
Efisiensi Kinerja Traktor dengan Bajak Rotari untuk Pengolahan Tanah Tahap Pertama pada Subak di Kabupaten Tabanan
Authors: Hakim Fiqri Muhamad , Tika I Wayan , Kencana Pande Ketut Diah
Published: October 2023

Abstrak

Efisiensi kinerja merupakan perbandingan antara kapasitas kerja aktual dengan kapasitas kerja teoritis yang dinyatakan dalam persen (%). Tujuan dari penelitian ini adalah untuk mengetahui efisiensi kinerja traktor rotari untuk pengolahan tanah tahap pertama pada subak di Kabupaten Tabanan dan menjadi data acuan untuk penelitian selanjutnya. Metode penelitian menggunakan metode deskriptif kuantitatif dimana pengambilan data dilakukan melalui survei, wawancara dan pengukuran langsung dilapangan yang disajikan secara deskriptif. Spesifikasi traktor rotari yang digunakan adalah traktor rotari dengan daya 10,5 pk dan beberapa batasan yang diterapkan seperti kondisi traktor dianggap serupa, kemampuan operator dianggap serupa, kemiringan lahan dianggap seragam, air untuk pengolahan tanah cukup dan hanya pengolahan tanah tahap pertama. Parameter yang diuji pada penelitian ini adalah kapasitas kerja aktual, kapasitas kerja teoritis, dan efisiensi kinerja traktor rotari. Hasil penelitian menunjukkan kapasitas kerja aktual sebesar 0,089 ha/jam, kapasitas kerja teoritis sebesar 0,155 ha/jam, dan efisiensi kinerja sebesar 57,091%.

Abstract

Performance efficiency is the ratio between actual working capacity and theoretical working capacity expressed in percent (%). The purpose of this study was to determine the efficiency of the performance of a rotary tractor for the first stage of tillage in subak in Tabanan Regency and become reference data for further research. The research method uses descriptive quantitative methods where data collection is carried out through surveys, interviews and direct measurements in the field which are presented descriptively. The specification of the rotary tractor used is a rotary tractor with a power of 10.5 hp and some limitations are applied such as the condition of the tractor is considered similar, the operator's ability is considered similar, the slope of the land is considered uniform, sufficient water for tillage and only the first stage of tillage. The parameters tested in this study were actual working capacity, theoretical working capacity, and efficiency of rotary tractor performance. The results showed the actual working capacity of 0.089 ha/hour, theoretical working capacity of 0.155 ha/hour, and performance efficiency of 57.091%.
Karakteristik Parameter Pertumbuhan Microgreen Lobak (Raphanus sativus) pada Jenis Media Tanam dan Penggunaan Grow Light
Authors: Zubairi Mus'ab Az , Sulastri Ni Nyoman , Budisanjaya I Putu Gede
Published: October 2023

Abstrak

Microgreen berpotensi dikembangkan pada sistem urban farming, karena kemudahan dalam mendapatkan media tanam, alat untuk digunakan serta dapat dibudidayakan pada lahan yang sempit. Microgreen lobak (Raphanus sativus) merupakan antioksidan yang baik bagi kesehatan yang berperan sebagai sumber polifenol. Tujuan penelitian ini ialah untuk mengetahui karakteristik pertumbuhan microgreen lobak pada pengaruh variasi media tanam dan LED grow light dan menentukan perlakuan yang menghasilkan pertumbuhan terbaik. Rancangan percobaan yang digunakan pada penelitian ini adalah Rancangan Acak Lengkap (RAL) dengan dua faktor, jenis media tanam dan penyinaran, dalam model faktorial 3 x 3 dengan 3 ulangan, sehingga 27 perlakuan. Hasil penelitian menunjukkan tidak ada pengaruh yang nyata antara media tumbuh (P > 0,05) dan penggunaan grow light pada beberapa parameter pertumbuhan microgreen. Namun demikian, secara visual penggunaan grow light dan media pasir menunjukkan hasil yang terbaik di beberapa parameter pertumbuhan. Perlunya akuisisi citra pada keseluruhan microgreen pada tray penanaman, untuk mendapatkan data yang lebih akurat dalam menentukan pengaruh media tanam dan grow light pada parameter pertumbuhan microgreen.

Abstract

Microgreen has the potential to be developed in urban farming systems because of the ease of obtaining planting media and tools to use and can be cultivated on a limited land space. Microgreen radish (Raphanus sativus) is an antioxidant that is good for health and acts as a source of polyphenols. This study aims to determine the growth characteristics of microgreen radish on the effect of variations in planting media and LED grow light and determine the treatment that produces the best growth. The experimental design used in this study was a completely randomized design (CRD) with two factors: the planting media and irradiation with a factorial pattern of 3 x 3 with three replications, so there were 27 treatments. The results showed no significant effect (P>0.05) between the growing media and grow light on several microgreen growth parameters. However, using grow light and sand media visually showed the best results in several growth parameters. The image acquisition on the whole microgreen planting tray is needed instead of randomly picking a single microgreen for analysis to get more accurate data in determining the effect of planting media and grow light on microgreen growth parameters.
Analisis Kinerja Distribusi Air Irigasi pada Temuku di Subak
Authors: Tika I Wayan , Kinasih Mentari , Sulastri Ni Nyoman , Sumiyati Sumiyati , Madrini Ida Ayu Gede Bintang
Published: October 2023

Abstrak

Gangguan distribusi air juga kadang-kadang disebabkan oleh adanya sampah dan faktor pemias (penyusutan debit) serta mengabaikan aliran numbak (aliran lurus) dan ngerirun (aliran berbelok). Dengan pemahaman seperti itu maka petani (krama subak) yang lahannya terletak di hilir cendrung mendapatkan kuota air yang kurang dari seharusnya. Penelitian ini bertujuan untuk mengetahui kinerja manajemen distribusi air irigasi sesuai nilai dan kriteria RPM pada subak tradisional dan subak semi teknis. Penelitian ini menggunakan metode deskriptif-kuantitaif yang menjelaskan peristiwa berdasarkan nilai RPM dari 30 bangunan bagi (temuku) pada subak di Kabupaten Gianyar. Hasil penelitian menunjukkan 30% memiliki kinerja distribusi air irigasi yang sangat kurang, 30% dengan kriteria kinerja kurang, 13% dengan kriteria kinerja cukup, dan 27% dengan kriteria kinerja baik. Dari hasil tersebut juga dapat diperoleh dimensi baru dari bangunan bagi pada subak dengan pendekatan formula proporsional yang melibatkan variabel luasan subak yang diberikan air irigasi, luasan subak di hilir, serta koefisien gangguan aliran air sekitar 1,05 sampai 1,1.

Abstract

Disturbances in water distribution are also sometimes caused by the presence of rubbish and biasing factors (decreased discharge) also ignoring the flow of numbak (straight flow) and ngerirun (curved flow). With this understanding, farmers (krama subak) whose land is located downstream tend to get less water quota than they should. This research aims to determine the performance of irrigation water distribution management according to RPM values ??and criteria in traditional subak and semi-technical Subak. This research uses a descriptive-quantitative method that explains events based on the RPM values ??of 30 buildings for (temuku) in Subak in Gianyar Regency. The research results showed that 30% had very poor irrigation water distribution performance, 30% had poor performance criteria, 13% had sufficient performance criteria, and 27% had good performance criteria. From these results, it is also possible to obtain a new dimension of the subak building using a proportional formula approach involving variables of the area of ??the subak provided with irrigation water, the area of ??the subak downstream, as well as a water flow disturbance coefficient of around 1.05 to 1.1.
Implementation of the Market Voucher in the Municipality of Franciscópolis, Mucuri Valley – MG
Authors: Melquiades Isac , De Souza Marcio Coutinho , Ferreira João Cesar de Souza , Mota Raquel Cristina Lucas , Ruas Adriana Andrade
Published: October 2023

Objective: To investigate the economic and social impacts of the tíquete feira program on the lives of small rural producers in the Municipality of Franciscópolis, MG.
 
Theoretical framework: A theoretical approach was conducted regarding public policies focused on family farming, solidarity economy, and social currency.
 
Method: In the first stage, an analysis of secondary data published by the Municipality of  Franciscópolis/MG was carried out. In the second stage, the IraMuTeQ software was used to analyze the content of publications on the subject.
 
Results and conclusion: It was possible to observe that the implementation of the fair ticket helped these families who live from agriculture to partially guarantee their own livelihood and that of the family, allowing for food and nutritional security. In addition, there is the appreciation and stimulation of family farming, enabling its continuity, because, through the increase of resources, it makes possible the improvement of the products taken to the street market.
 
Implications of the research: The study highlights the importance of addressing the solidarity economy, taking into account cultural diversity and seeking efficient solutions for the development of family farming and the local economy. It also emphasizes the implementation of public policies by the Municipality of Franciscópolis, MG, to support these goals.
 
Originality/Value: This is a regionalized study about the solidarity economy promoted by a municipal entity in order to encourage family farmers, through its own social currency (ticket fair) and, at the same time, translates into a welfare public policy, insofar as the fair ticket is provided to local municipal employees and also to local families in situations of social vulnerability.
Rural Settlement as an Agent of Agricultural Development in Brazil: Portrait and Challenges in the Context of the Brazilian Amazon
Authors: Alves Sabrina do Carmo , Ferreira Jéssica , E Silva Arthur Amaral , Da Gama Rafael Carvalho Nogueira , Calijuri Maria Lúcia , Ferreira Italo Oliveira
Published: October 2023

Objective: Study carried out in the Padre Josimo Tavares settlement project, located in the Brazilian Amazon, to portray the social reality, productivity and agricultural spatial distribution, as well as its implications for the preservation of the Amazon biome.
 
Theoretical framework: The developmental measures adopted in the Amazon region, which include the creation of numerous settlement projects, did not consider the need to conserve natural resources. Currently, it is necessary to boost agricultural productivity combined with strategies that contribute to plant recovery and curb deforestation.
 
Method: Data were collected in the field, and also spatial data were obtained, which were synthesized and analyzed using spatial, statistical and multicriteria analysis to verify the distribution and environmental suitability of agricultural activities.
 
Results and conclusion: The settlers grow various plant products and most of them produce species strongly adapted to the region, which offers a productive advantage. Beef cattle farming is widely practiced; however, it is widely identified as the main cause of deforestation in the Amazon biome. To overcome this environmental obstacle, the recommended and discussed approaches were the implementation of agroforestry systems and zero deforestation commitment policies.
 
Research implications: Knowing the socioeconomic and environmental reality of settlement projects is essential to identify strategies that increase, in an integrated manner, social, economic and environmental sustainability.
 
Originality/value: Use of unpublished data obtained through field collections of the RADIS-UFV Project, the result of a partnership between the National Institute of Colonization and Agrarian Reform and the Federal University of Viçosa.
Theory and methods of designing high-speed monohull ships
Authors:   Krylov State Research Centre, St. Petersburg, Russia, Anosov Viktor N.
Published: October 2023

Рассмотрены вопросы выбора основных характеристик и оценки ходовых качеств быстроходных однокорпусных судов различного назначения. Выполнен анализ основных характеристик построенных быстроходных судов: пассажирских и автомобильно-пассажирских паромов, многоцелевых судов для обеспечения работы морских объектов. Отмечены конструктивные особенности каждого типа судов, определены основные параметры, характеризующие форму корпуса и энерговооруженность судов. Выполнен анализ результатов систематических модельных испытаний круглоскулых и остроскулых судов. Построены обобщенные диаграммы для определения остаточного сопротивления судна в зависимости от коэффициента статической нагрузки и числа Фруда по водоизмещению. Приведенные материалы позволяют рассчитывать сопротивление воды и буксировочную мощность для судов с разной формой корпуса. Книга предназначена для инженеров-судостроителей, научных работников, студентов и аспирантов кораблестроительных вузов.
Beziehung ‚schaffen‘, wo sonst niemand ist: Personzentrierte Arbeit mit Klient*innen in ethical loneliness
Authors: Gahleitner Silke Brigitta , Deninger Lea , Völschow Yvette
Published: October 2023

Personzentriertes Arbeiten findet nicht nur in geschützten Therapiesettings statt. Die aktuelle globale Lebenswelt produziert immer größere Undurchschaubarkeit und damit Unsicherheit, insbesondere im Beziehungs- und Einbettungsbereich. Beziehungs- und Vertrauensprozessen kommt daher eine wachsende Bedeutung zu. Dies gilt ganz besonders für benachteiligte und früh im Leben verletzte Klient*innen. Was aber bedeutet personzentriertes Arbeiten mit sog. Multiproblemklient*innen? Welche Schwierigkeiten tun sich hier auf? Inwieweit kann der Personzentrierte Ansatz hier einen genuinen Beitrag leisten? Inwieweit brauchen wir dafür entsprechende Kenntnisse? Und welches praktische personzentrierte Vermögen ist nötig, um kongruent, wertschätzend und empathisch Klient*innen in dieser Situation zu verstehen und dies so zu transportieren, dass es auch wirklich ankommt? Der Artikel reflektiert Möglichkeiten personzentrierter Vertrauens- und Beziehungsanbahnung sowie -gestaltung in diesem Arbeitsbereich und diskutiert die Notwendigkeit psychosozialer Perspektiven im Personzentrierten Ansatz.
Rancang Bangun Sistem Pemutus Arus Listrik Berdasarkan Pemantauan Ketinggian Banjir di Perumahan dan Notifikasinya Via Telegram
Authors: Fadhreane Reza , Wildian Wildian
Published: October 2023

Telah dirancang sistem pemutus arus listrik otomatis berdasarkan deteksi ketinggian banjir di perumahan dan notifikasinya via Telegram untuk menghindari terjadinya korsleting listrik. Sistem ini dirancang agar masyarakat pengguna dapat mengetahui kondisi keamanan listrik di rumahnya pada saat terjadi banjir. Sistem ini terdiri dari sensor ultrasonik HC-SR04 untuk mendeteksi ketinggian air, motor servo untuk menggerakkan tombol on/off MCB, buzzer untuk peringatan awal sebelum listrik dimatikan, modul mikrokontroler NodeMCU ESP8266 untuk mengendalikan sistem dan mengirimkan informasi ke smartphone pengguna melalui aplikasi Telegram. Hasil pengukuran, analisis, dan uji coba yang telah dilakukan menunjukkan bahwa sistem dapat berfungsi dengan baik untuk memutuskan arus pada saat ketinggian banjir mencapai nilai yang ditentukan, yaitu 3 cm. Buzzer akan berbunyi ketika ketinggian air di dalam rumah mencapai 2 cm, dan pengguna akan mendapatkan notifikasi dari Telegram bahwa listrik akan dimatikan. Sistem ini belum dirancang untuk menyalakan kembali aliran listrik ketika air telah surut di bawah 3 cm.
Perhitungan Shutdown Margin Teras NuScale Menggunakan OpenMC
Authors: Razaqiyanto Hadi , Shafii Mohammad Ali , Raflis Helen
Published: October 2023

One of the important reactor safety parameters to study is the issue of shutdown margin (SDM). This study aims to obtain an effective safety design of the NuScale reactor in reviewing the SDM value parameter. SDM calculations are performed using OpenMC, which is a programming code based on the Monte Carlo method. OpenMC is an open source calculation code that has the advantage of access to modifications to the reactor core geometry design. The type of reactor used in this simulation is the NuScale Small Modular Reactor (SMR) which is a Pressurized Water Reactor (PWR) type of reactor. The NuScale core simulation was designed in accordance with the General Design Criterion (GDC), which is a core arrangement that has a Control Rod Assemblies (CRA) regulating bank (RB) and CRA shutdown bank (SB) and UO2 fuel with an enrichment of <4.9%. From the calculation results, the SDM value of NuScale is 17743 pcm. This NuScale core SDM value indicates that the NuScale reactor under study complied with the sufficient safety design limits for all power levels and operating modes.
Pengaruh Penambahan Serat Pinang Terhadap Sifat Fisik dan Mekanik Papan Beton Ringan dengan Fly ash Sebagai Filler
Authors: Renaldi Muhammad Blestynsky , Mahyudin Alimin
Published: October 2023

Research has been carried out on the effect of adding betel nut to the physical and mechanical properties of lightweight concrete boards with fly ash as filler. Variation of areca fiber 0.2%; 0.4%; 0.6%; 0.8%;1% by using a random arrangement of fibers. Physical and mechanical properties tested include density, water absorption, porosity, compressive strength, and flexural strength measured by Universal Testing Machine (UTM). Based on the test results, adding areca fiber mass is inversely proportional to density and proportional to porosity and water absorption. The lowest density value in the 1% fiber variation sample is 2 gr/cm3, the lowest porosity value is 19.56% with the composition without fiber and fly ash, and the lowest water absorption value is 9.47% in the composition without fiber and fly ash. Fly ash with betel nut ableto increase the value of the compressive strength and flexural strength of the lightweight concrete board sample. The highest compressive strength value in the addition of fiber is 78.5 kg/cm3 with a fiber composition of 1%, while the highest flexural strength value is 66 kg/cm3 with a fiber composition of 1%. The porosity and water absorption values of the sample had SNI 03-2105-2006 standard. In addition, the compressive strength value obtained from the sample test meets the SNI 03-3449-2002 standard.
Pengaruh Tegangan terhadap Nilai CTDIvol, Dose Length Product dan Dosis Efektif pada Pemeriksaan Computed Tomography (CT) Abdomen: Studi di Rumah Sakit Umum Pusat Dr. M. Djamil
Authors: Fiarka Fulki , Oktamuliani Sri , Nuraeni Nunung
Published: October 2023

Penelitian ini bertujuan untuk menginvestigasi dampak variasi tegangan pada dosis radiasi yang diterima oleh pasien yang menjalani pemeriksaan Computed Tomography (CT) abdomen menggunakan mesin pemindai Philips 128 slice. Penelitian ini difokuskan pada evaluasi hubungan antara tegangan, Compued Tomography Dose Index Volume (CTDIvol), Dose Length Product (DLP), dan dosis efektif pada organ gonad pasien. Sampel terdiri dari 20 pasien dengan postur tubuh normal yang menjalani pemeriksaan CT abdomen, dengan variasi tegangan sebesar 100 kV dan 120 kV. Temuan penelitian menunjukkan bahwa nilai rata-rata CTDIvol adalah (72,028 Â± 18,88) mGy dan DLP diukur sebesar (3369,06 Â± 1036,70) mGy.cm. Selain itu, dosis efektif yang diserap organ gonad sebesar (6,8011 Â± 2,30) mSv. Terdapat peningkatan yang signifikan secara statistik dalam CTDIvol, DLP, dan dosis efektif dengan peningkatan variasi tegangan. Hubungan ini didukung oleh P-value < 0,05, menunjukkan signifikansi statistiknya. Hasil ini menunjukkan pentingnya mempertimbangkan pengaturan tegangan dalam mengoptimalkan protokol pemeriksaan CT untuk menjaga keselamatan pasien. Dengan memahami pengaruh tegangan pada dosis radiasi, para profesional kesehatan dapat mengadopsi strategi untuk meminimalkan paparan radiasi pada pemeriksaan CT abdomen.
Analisis Sifat Fisis dan Mekanik Biodegradable Foam Berbahan Dasar Selulosa Jerami Padi dan Polivinyl Alcohol
Authors: Haiqal Helmi , Muldarisnur Mulda
Published: October 2023

Research has been carried out on analyzing the physical and mechanical properties of biodegradable foam made from rice straw cellulose with a polyvinyl alcohol binding matrix. This study aims to produce a substitute for styrofoam, which is considered not environmentally friendly and harmful to health. The composition of straw fiber and polyvinyl alcohol was varied by the mass ratio of the mixture of rice straw fiber and PVA (%) 40:20%, 30:30%, 20:40%, 50:10%, with the size of the fiber passing through the 80 mesh sieve. The results of the characterization using FT-IR showed that the highest content of functional groups was carbon (C), which corresponds to the content of conventional biofoam, which consists of the elements carbon (C) and hydrogen (H). The highest biofoam tensile strength value is in the comparison fraction (20:40%) of 18.11 MPa. The highest percentage of biofoam water absorption was obtained in the fraction ratio (50:10%) of 0.8928% in the treated sample and 1.1928% in the untreated sample. The percentage of biofoam water content closest to conventional biofoam water content is obtained at a fraction ratio (40:20%) of 0.78%. The highest degradation rate was obtained in samples with a comparative fraction (50:10%) of 0.04237%/day in treated and 0.06403%/day in untreated samples. The results of this study stated that the resulting biofoam did not contain harmful substances. After identifying the functional groups using the FT-IR test, the tensile strength of biofoam still did not meet the SNI 7188.7: 2016 bioplastic standard.
Pengaruh Madden Julian Oscillation (MJO) Terhadap Kemunculan Mesoscale Convective Complex (MCC) di Wilayah Maluku
Authors: Saragih Rino Wijatmiko , Malago Jasruddin Daud , Subaer Subaer
Published: October 2023

Awan Konvektif berupa tutupan awan yang cukup besar dan memenuhi karakteristik Mesoscale Convective Complex (MCC) yang terjadi selama tahun 2017 hingga 2021 pada wilayah Maluku. . Tutupan awan konvektif skala meso ini memiliki ciri durasi yang cukup panjang, bentuk semi melingkar dan memiliki pola tutupan awan yang besar. Penulisan ini bertujuan untuk menganalisis kemunculan kluster awan Mesoscale Convective Complex (MCC) serta pengaruh Madden Julian Oscillation (MJO) terhadap jumlah kemunculan MCC. Pengolahan MCC ini menggunakan data citra satelit Himawari-8 kanal inframerah dengan algoritma yang telah dibangun dan berdasarkan karakteristik MCC yang ada di Indonesia. Data yang juga digunakan yaitu data sekunder tahun 2017-2021 yang terdiri dari data harian MJO diperoleh dari website BMRC (Bureau of Meteorologi Research Centre). Teknik analisis data yaitu dengan persamaan regresi linier sederhana menggunakan Software SPSS Statistict 25. Hasil analisis menunjukan jumlah kejadian MCC terbanyak terjadi pada bulan Maret, Mei, dan Desember. Jumlah kejadian MCC sedikit terjadi pada bulan Agustus dan Oktober. Besar pengaruh MJO terhadap kemunculan MCC tertinggi terjadi pada bulan Maret (56,7%) dan April (55,1%), sedangkan terendah terjadi pada September (0%) dan Juni (1,3%)
Antibacterial Activity against Gram-Positive and Gram-Negative Bacteria and Biolarvicide to Aedes aegypti from Cocok Bubu (Elatostema rostratum (Blume) Hassk) Leaves Extract
Authors: Lela Lailatul Khumaisah  , Rika Ayuningtias  , Salih Muharam  , Reni Mulyani  , Luthfi Awaliah
Published: October 2023

Tropical diseases are infectious diseases that commonly occur in tropical climates. Infectious diseases are caused by bacteria, viruses, parasites, and are transmitted by several vectors. There are 8 neglected tropical diseases (NTDs) that have spread in Indonesia. Therefore, massive efforts are needed to overcome this disease. Active plant substances have long been popular in treating various diseases. Cocok Bubu (Elatostema rostratum (Blume) Hassk) is an endemic plant of Indonesia. Ethnobotanical studies of this plant are used to treat fever and diarrhea. But, there are no pharmacological studies on previous research because this species belongs to a limited distribution plant. However, Elatostema has a secondary metabolite with various pharmacological activities. This study aims to determine the activity of antibacterial and biolarvicides from Cocok bubu leaf extract. The extraction using the maceration method with acetone, phytochemicals screening, toxicity test using BSLT, antibacterial test with disc diffusion to Escherichia coli, Staphylococcus aureus, Streptococcus mutant, and Streptococcus sanguinis, and biolarvicide activity against Aedes aegypti. Based on the results, Cocok bubu leaf extract contains flavonoids, alkaloids, saponin, tannin, terpenoids, and steroids with a toxicity of 758.45 ppm. From antibacterial activity results, Cocok bubu exctract had the best inhibition zone against Staphylococcus aureus (10 – 18 mm). According to the biolarvicide test, it is effective as a biolarvicide to Aedes aegypti with LC50 51.099 ppm and LT50 of 5 h 43 min. This study shows that Cocok bubu was more effective for treating and preventing NTDs in Indonesia, especially dengue and chikungunya fever in the future.
Pengaruh Perbandingan Massa Silikon/Silika terhadap Karbon pada Kinerja Anode Baterai Litium Ion dari Sekam Padi
Authors: Rochliadi Achmad , Ramdhan Mohammad Alief , Patah Aep
Published: October 2023

This study aims to investigate the possible utilization of silica (SiO2) and silicon (Si) derived from rice husks as anode materials in lithium-ion batteries (LIBs). SiO2 and Si have impressive theoretical capacities of 1965 and 4200 mAh/g, respectively. However, their direct use as LIBs anodes faces challenges such as substantial volume changes during battery charging and discharging, as well as low electrical conductivity. Consequently, a common approach is to create nanostructures of SiO2 and Si, such as nanoparticles, nanowires, and nanotubes, and combine them with conductive matrices like carbon-based materials. In this study, the Si/SiO2/C composite was synthesized from rice husks, taking into account the mass ratio of Si/SiO2 to C. The process involved first separating SiO2 and C from rice husks and then synthesizing the composite using the ball mill method and activated molten salt aluminothermic reduction (AlCl3/NaCl). X-ray Diffraction (XRD) analysis confirmed the successful synthesis of the composite, as indicated by characteristic peaks of the constituent compounds. Scanning Electron Microscope (SEM) imaging showed non-uniform morphology with varying particle sizes. Tests results demonstrated that the Si/SiO2/C composite with a 3:1 ratio exhibited the most promising performance as a LIB anode, maintaining a high capacity of 280.48 mAh/g with a Coulombic Efficiency (CE) of 99% after 50 testing cycles. These findings suggest that silica and silicon compounds derived from rice husks hold great potential as efficient and durable anode materials for LIBs applications.
الأنماط الجسمية السائدة وعلاقتها بالاغتراب النفسي لدى طالبات المرحلة الإعدادية في مدينة الموصل
Authors: طه عبد فالح , نذير ذنون عمر
Published: October 2023

هدف البحث الى التعرف على النمط الجسمي السائد لدى طالبات المرحلة الإعدادية في مدينة الموصل وتحديدا طالبات الصف الخامس الادبي، والتعرف على مستوى الاغتراب النفسي لديهن،  إضافة الى التعرف على العلاقة بين النمط الجسمي والاغتراب النفسي للطالبات ، حيث استخدم الباحثان المنهج الوصفي الارتباطي لملائمته لطبيعة البحث، وتكون مجتمع البحث من طالبات المرحلة الإعدادية وتحديدا طالبات الصف الخامس الادبي في مدينة الموصل، اما عينة البحث فتكونت من 150 طالبة تم اختيارهم بالطريقة العشوائية واعتمد الباحثان الوسائل الإحصائية الملائمة للبحث (الوسط الحسابي، الانحراف المعياري، معامل اختبار (T-test)، النسبة المئوية) واستخدم الباحث الحقيبة الإحصائية   (Spss) في معالجة البيانات.

النمط الجسمي السائد لدى الطالبات هو النمط النحيف، كما أظهرت النتائج ان مستوى الاغتراب الرياضي لدى الطالبات ذوات النمط العضلي والنحيف كان اقل من المتوسط الفرضي للمقياس مما يدل على انخفاض مستوى الاغتراب لديهم، بينما الطالبات ذوات النمط البدين كان مستوى الاغتراب الرياضي لديهم اعلى من المتوسط الفرضي للمقياس وهذا يدل على ارتفاع مستوى الاغتراب الرياضي لديهم، كما واظهرت النتائج وجود علاقة ارتباط موجبة بين النمط النحيف والاغتراب النفسي ، ووجود علاقة ارتباط موجبة بين النمط العضلي والاغتراب النفسي ، وجود علاقة ارتباط سالبة بين النمط السمين والاغتراب النفسي.
تقويم فاعلية الاداء الإداري لمدراء مديريات وزارة الشباب والرياضة لرعاية الموهبين الرياضيين من وجهة نظر العاملين فيها
Authors: محمد حسون السعدي غيداء
Published: October 2023

هدفت الدراسة الحالية الى التعرف على فاعلية الأداء الإداري لدى مدراء مديريات وزارة الشباب والرياضة لرعاية الموهبين الرياضيين من وجهه نظر العاملين فيها . حيث كانت عينة البحث من العاملين في وزارة الشباب والرياضة العراقية  حيث حددت الباحثة مجتمع بحثها بجميع العاملين في مديريات وزارة الشباب والرياضة العراقية والبالغ عددهم (500) من العاملين وبنسبة 43%  والموزعين على (10) مديريات والموزعين حيث تم استبعاد العينة الاستطلاعية وبذلك يصبح عينة البحث (215) من العاملين استخدمت الباحثة الحقيبة الإحصائية SPSS وقد اوصت الدراسة ضرورة تقوية العلاقة بين المدراء والعاملين من ناحية المشاركة الجماعية فيما بينهم من خلال إقامة الدورات التدريبية للمدراء بضرورة لاهتمام بجانب المشاركة الجماعية مع العاملين . ومواكبة التطورات الإدارية الحديثة في مجال الإدارة الرياضية لمواجهه التغيرات السريعة في دول العالم. وضرورة استخدام أساليب مستحدثة من قبل المدراء للتخلص من العمل التقليدي الكلاسيكية المتبع. وإعطاء حوافز وجوائز للعاملين المبدعين في عملهم من اجل خلق جو المنافسة الشريفة بين العاملين وزيادة الإنتاج بشكل كبير.
أنماط الهوية الرياضية وعلاقتها بالصمود النفسي للاعبي بعض الالعاب الفرقية في مديرية شرطة محافظة صلاح الدين
Authors: كريم مطر العيساوي ياسر , احمد خطاب عبدالودود
Published: October 2023

هدف البحث إِلى: التعرف على أنماط الهوية الرياضية والصمود النفسي للاعبي الالعاب الفرقية في مديرية شرطة صلاح الدين.

التعرف على العلاقة بين أنماط الهوية الرياضية والصمود النفسي للاعبي بعض الالعاب الفرقية في مديرية شرطة صلاح الدين .

اعتمد الباحثان على المنهج الوصفي بأسلوبين هما المسحي والعلاقات المتبادلة لملائمتهما طبيعة البحث ، تكون مجتمع البحث من لاعبي كرة القدم للملاعب الخارجية والصالات ولاعبي الكرة الطائرة  للموسم الرياضي 2020– 2021 في مديرية شرطة محافظة صلاح الدين والبالغ عددهم ( 348 ) لاعبا ، في حين تم استبعاد ( 10 ) لاعباً وذلك لاشتراكهم في التجربة الاستطلاعية و(6) لاعبين لإجاباتهم الخاطئة على المقياس ، واستخدم الباحثان الوسائل الإحصائية  ومنها ( الوسط الحسابي ، الانحراف المعياري ، اختبار t ، مربع كاي، الخطأ المعياري للمقياس ، ومعامل الارتباط البسيط ( بيرسون ) ، SPSS  ، والنسبة المئوية ، معادلة سبيرمان ) . وتوصل الباحثان إلى متغيري أنماط الهوية الرياضية  والصمود النفسي لدى لاعبو الالعاب الفرقية( كرة القدم للملاعب الخارجية ، كرة القدم للصالات ، الكرة الطائرة )  لمديرية شرطة محافظة  صلاح الدين لها علاقة ارتباط ايجابية .
اهم القياسات والمؤشرات الجسمية ونسبة مساهمتها بأداء المهارات الحركية الاساسية للاعبي كرة اليد
Authors: مصطفى صفاء محمد يحيى
Published: October 2023

يهدف البحث إلى:

1- التعرف على اهم القياسات والمؤشرات الجسمية للاعبي كرة اليد 

2- التعرف على القياسات والمؤشرات الجسمية ونسبة مساهمتها بأداء المهارات الحركية الاساسية للعبة

3- التعرف على  العلاقة بين بعض القياسات الجسمية واداء المهارات الاساسية للاعبي كرة اليد

     واستخدم الباحث المنهج الوصفي بأسلوبه المسحي والعلاقات الارتباطية لملائمته حل مشكلة البحث وتم اختيار مجتمع البحث من لاعبي منتخب كلية التربية في الجامعة المستنصرية بصورة عمدية للموسم الدراسي (2018-2019) والبالغ عددهم (14) لاعباً تم استبعاد و(4) لاعبين عشوائيا عن طريق القرعة  ليمثلوا التجربة الاستطلاعية واصبح مجموع العينة   (10) لاعبين  بنسبـة (71.42%) من مجتمع الاصل .

تم تحديد القياسات الجسمية الاختبارات والمهارية المستخدمة قيد البحث وتم استخراج الاسس العلمية للاختبارات   قام الباحث إجراء تجربة استطلاعية لمعرفة مدى وضوح تعليمات الاختبارات وفقراتها. وطريقة تنفيذ القياسات الجسمية المحددة على عينة من لاعبي كرة اليد من خارج عينة البحث

          تم استخدام الحقيبة الاحصائية (SPSS) للمعالجات الاحصائية وبعد عرض وتحليل النتائج ومناقشتها تم التوصل الى الاستنتاجــات التالية :

وجود ارتباط معنوي بين القياسات الجسمية التالية، (وزن الجسم، طول الجسم، طول الذراع مع الكف، طول الرجل، طول الفخذ، طول الساق، محيط الصدر، عرض الكتفين، عرض الصدر) وبين باداء المهارات الاساسية للاعبي كرة اليد.

من خلال القيمة الاحتمالية لمستوى الدلالة ظهرت فروق للقيم الاحتمالية لجودة التوفيق للأنموذج الخطي المتعدد في ضـوء مستوى الدلالة.
Revisiting John Chrysostom’s Interpretation of the Relationship between Abram and Lot and Their Separation in LXX Genesis 12–13
Authors: De Wet Chris L
Published: October 2023

This article revisits and examines more closely John Chrysostom’s (ca. 349–407 CE) characterisation of Lot—specifically his relationship with Abram and their separation in LXX Gen 12–13—as an exemplar to think about early Christian social relations. This study forms part of a larger project investigating Chrysostom’s use of Old Testament exemplars in his preaching and moral instruction. It is shown that the formulation of early Christian social ideals was mediated by means of scriptural exemplars like Lot. Rickett’s (2019) descriptive analysis of Chrysostom’s reconstruction of Lot’s character in Gen 13 is a useful trajectory for this study. However, while Rickett explains in detail what Chrysostom thought about Lot’s separation from Abram (and how this differs or concurs with other interpreters), he does not discuss why Chrysostom reconstructs the character of Lot in the way he does. This is the purpose of this study—to ask more pertinent questions on why Chrysostom wants to safeguard Lot’s reputation and, more generally, why he was such a useful exemplar in early Christian biblical interpretation.
Archiving of Indigenous Languages with Specific Reference to IsiXhosa
Authors: Diko Mlamli
Published: October 2023

It cannot be nullified that the advancement of isiXhosa will not be actualised without the employment of information science as a discipline and practice for the very reason that archiving is a significant component that can lead to visible solutions to the conundrum that has recurrently engulfed this language. Divorcing information science from isiXhosa, or vice versa, is a decaying and deliberate endeavour that delays the transformation of isiXhosa as an indigenous South African language. This conceptual article pivots on personal experiences through a qualitative research inquiry to underline some of the principal challenges that impede the archiving of indigenous South African languages with specific reference to isiXhosa. The objective is to sensitise regarding the preservation and protection of the linguistic and cultural heritage of the amaXhosa community for future generations and to guarantee its recognition and revitalisation. The study’s literature review, among other components, indicates that challenges concerning the archiving of indigenous South African languages, including isiXhosa, are advanced by languages whose stature is least known or unknown entirely. Ultimately, the principal argument underscores that language archiving through information science is an area of contention. The principal recommendation is that the advancement of the isiXhosa language requires a multi-collaborative effort in a bid to advance its intellectualisation. The closing remarks indicate the necessity to continue the discourse beyond the aims and objectives of this conceptual article.
Information Literacy Training in Teaching Ethical and Plagiarism-Avoidance Skills among First-Year Students at a Private Tertiary Institution
Authors: Khoza Banele Witness , Wessels Nicoline
Published: October 2023

There is an expectation that students in higher education be in possession of certain information or research skills. Information literacy equips students with skills to ethically handle and use information, thereby respecting the ideas of others. First-year students at the private higher education institution under discussion lack information literacy skills necessary to handle unethical use of information in their academic activities, despite information literacy sessions being available to them. The problem seems to be less a wilful disregard for the rules than compounded by inexperience and a lack of in-depth understanding of the application of information literacy skills. This article reports on the findings of a master’s study undertaken to investigate the role the information literacy training offered at the institution plays in inculcating ethical use of information skills and plagiarism-avoidance techniques among first-year students. The study adopted a qualitative approach using questionnaires and interviews where 188 first-year students were purposively selected through a census. The findings revealed that information literacy plays a significant role in raising awareness of ethical use of information issues and plagiarism. It trains students in the efficient and effective access and use of sources and sensitises them concerning upholding academic integrity. Although the training has been effective in sensitising students about the importance of academic integrity, it has, however, not been effective in curbing plagiarism as cases of plagiarism are still high. The study recommends the development of a formal information literacy programme that will teach plagiarism-avoidance techniques and impart and instil ethical use of information skills.
Hot Topics and Current Issues Related to Aircraft Ownership, Cost Sharing, and a Case in Point if the Law is Not Followed
Authors: Staton Katherine
Published: October 2023

This paper will explore the issues encountered when multiple users and/or entities purchase or sell an aircraft for business or personal use, which commonly involve the navigation of and compliance with Federal Aviation Administration (FAA) and Internal Revenue Service (IRS) regulations and accompanying federal statutes. This paper will also address the ownership of aircraft by multiple individuals and/or entities, and then operations under various ownership structures. Where multiple aircraft owners are involved, the utilization of dry leases, time sharing agreements, interchange agreements, and co-owner/joint-ownership agreements may be used to navigate FAA and IRS regulations and rules. Also, co-owning an aircraft, but not actually having “ownership” of the aircraft, through another company (an off balance sheet entity for example) will be addressed. Aircraft owned through an owner trust can also provide anonymity, ownership advantages, and can help navigate ownership registration issues. This paper will also address the U.S. Eastern District Federal Court Criminal Organized Crime and Drug Task Force Enforcement prosecution case against an aviation escrow, title, and trust company; along with the principals of those companies, which involved aircraft registration, sale, and ownership issues.
Constitución, Estado, Democracia y Justicia, entre la ficción y la realidad. Al hilo de las crisis democráticas en las sociedades iberoamericanas.
Authors: Colomer Viadel Antonio
Published: October 2023

En los últimos tiempos vivimos conmociones sociales y políticos intensas en diversas sociedades y países latinoamericanos o iberoamericanos, y aunque hay circunstancias diversas, es evidente que en todos ellos coinciden la debilidad del sistema de partidos, el resquebrajamiento institucional, la crisis del Estado de Derecho, manifestada tanto en la poca o nula independencia del poder judicial y la vulneración de la separación de poderes, con un predominio del poder ejecutivo sobre los otros poderes del Estado. A todo ello se une una mayor consciencia sobre las profundas desigualdades existentes en tales sociedades, y sobre el abuso del poder, la corrupción generalizada y ese presidencialismo, en superlativo, que todo lo quiere controlar y desconfía de cualquier cesión de poder o soberanía, como menoscabo a su papel monopolizador de cualquier esfera de autoridad y función de control.
Leveraging Large Language Models for Predictive Chemistry
Authors: Jablonka Kevin Maik , Schwaller Philippe , Ortega-Guerrero Andres , Smit Berend
Published: October 2023

Machine learning has revolutionized many fields and has recently found applications in chemistry and materials science. The small datasets commonly found in chemistry sparked the development of sophisticated machine-learning approaches that incorporate chemical knowledge for each application and, therefore, require much expertise to develop. Here, we show that large language models trained on vast amounts of text extracted from the internet can easily be adapted to solve various tasks in chemistry and materials science by fine-tuning them to answer chemical questions in natural language with the correct answer. We compared this approach with dedicated machine-learning models for many applications spanning properties of molecules and materials to the yield of chemical reactions. Surprisingly, this approach performs comparable to or even outperforms the conventional techniques---particularly in the low data limit. In addition, we can perform inverse design successfully by simply inverting the questions. The high performance, especially for small data sets, combined with the ease of use, can fundamentally impact how we leverage machine learning in the chemical and material sciences. Next to a literature search, querying a foundation model might become a routine way to bootstrap a project by leveraging the collective knowledge encoded in these foundation models or to provide a baseline for predictive tasks.
Characterising conical intersections in DNA/RNA nucleobases with multiconfigurational wave functions of varying active space size
Authors: Cuéllar-Zuquin Juliana , Pepino Ana Julieta , Fernández Galván Ignacio , Rivalta Ivan , Aquilante Francesco , Garavelli Marco , Lindh Roland , Segarra-Martí Javier
Published: October 2023

We characterise the photochemically relevant conical intersections between the lowest-lying accessible electronic excited states of the different DNA/RNA nucleobases using Cholesky decomposition-based complete active space selfconsistent field (CASSCF) algorithms. We benchmark two different basis set contractions and several active spaces for each nucleobase and conical intersection type, measuring for the first time how active space size affects conical intersection topographies in these systems, and the potential implications these may have towards their description of photoinduced phenomena. Our results show conical intersection topographies are highly sensitive to the electron correlation included in the model: by changing the amount (and type) of correlated orbitals, conical intersection topographies vastly change, and the changes observed do not follow any converging pattern towards the topographies obtained with the largest and most correlated active spaces. Comparison across systems shows anal- ogous topographies for almost all intersections mediating population transfer to the dark ¹nO/Nπ* states, while no similarities are observed for the “ethylene-like” conical intersection ascribed to mediate the ultrafast decay component to the ground state in all DNA/RNA nucleobases. Basis set size seems to have a minor effect, appearing to be only relevant for purine-based derivatives. We rule out structural changes as a key factor in classifying the different conical intersections, which display almost identical geometries across active space and basis set change, and highlight instead the importance of correctly describing the electronic states involved at these crossing points. Our work shows careful active space selection is essential to accurately describe conical intersection topographies, and therefore to adequately account for their active role in molecular photochemistry.
Durable Light-Driven pH Switch for CO2 Capture/Release Enabled by Tuning Solvation Environment of Photoacids
Authors: de Vries Anna , Goloviznina Kateryna , Reiter Manuel , Salanne Mathieu , Lukatskaya Maria R.
Published: October 2023

Photoacids are organic molecules that release protons under illumination, providing spatiotemporal control of pH. Such light-driven pH switches offer the ability to cyclically alter the pH of the medium and are highly attractive for a wide variety of applications, including CO2 capture. Although photoacids such as protonated merocyanine can enable fully reversible pH cycling in water, they have a limited chemical stability against hydrolysis (<24 hours). Moreover, these photoacids have low solubility and provide only a small pH-jump. In this work we introduce a simple pathway to dramatically increase stability and solubility of photoacids by tuning their solvation environment in binary solvent mixtures. We show that a preferential solvation of merocyanine by aprotic solvent molecules results in a 60% increase in pH modulation magnitude when compared to the behavior in pure water and can withstand stable cycling for > 350 hours. Our results suggest that a very high stability of merocyanine photoacids can be achieved in the right solvent mixtures, offering a way to bypass complex structural modifications of photoacid molecules and serving as the key milestone towards their application in a photo-driven CO2 capture process.
Exploring CPS-extrapolated DLPNO-CCSD(T1) reference values for benchmarking DFT on enzymatically catalyzed reactions
Authors: Wappett Dominique , Goerigk Lars
Published: October 2023

Domain-based local pair natural orbital Coupled Cluster Singles Doubles with Perturbative Triples [DLPNO-CCSD(T)] is regularly used to calculate reliable benchmark reference values at a significantly lower computational cost compared to canonical CCSD(T). Recent work has shown that even greater accuracy can be obtained at only a small additional cost through extrapolation to the complete PNO space (CPS) limit. Herein we test two levels of CPS extrapolation—CPS(5,6), which approximates the accuracy of standard TightPNO, and CPS(6,7),which surpasses it—as benchmark values to test density functional approximations (DFAs) on a small set of organic and transition-metal-dependent enzyme active site models. Between the different reference levels of theory there are changes in the magnitudes of the absolute deviations for all functionals, but these are small and there is minimal impact on the relative rankings of the tested DFAs. The differences are more significant for the metalloenzymes than the organic enzymes, so we repeat the tests on our entire ENZYMES22 set of organic enzyme active site models to confirm that using the CPS extrapolations for the reference values has negligible impact on the benchmarking outcomes. This means we can particularly recommend CPS(5,6) as an alternative to standard TightPNO settings to increase the applicability of DLPNOCCSD(T) in calculating accurate BHs and REs for larger models of organic enzymes. The DLPNO-CCSD(T)/CPS(6,7) energies for ENZYMES22 are finally presented as the updated reference values for the set, reflecting the recent improvements in the method.
Pharmacovigilance in Saudi Arabia: A Narrative Review on Adverse Drug Reaction Reporting
Authors: J. Al Khabbaz Hana
Published: October 2023

Adverse drug reaction (ADR) reporting is an important aspect of pharmacovigilance (PV) in ensuring drug safety during the post-marketing surveillance phase. Currently, the National Pharmacovigilance Center (NPC) established by the Saudi Food and Drug Authority (SFDA) is the regulatory authority receiving ADR reports in Saudi Arabia. Spontaneous ADR reports from healthcare professionals and the public are received by the NPC through an electronic platform known as the Saudi Vigilance System. Signal analysis of the received ADR reports aids the decision-making initiatives related to the reported drugs. Stakeholders’ contribution to ADR reporting, and implementation of effective electronic platforms are important factors affecting the national PV performance. The concept of stakeholders reporting on ADR is relatively new in Saudi Arabia, especially to the public. In this narrative review the national studies describing the stakeholders’ knowledge, perception and barriers toward ADR reporting, and the incidence of ADR reporting by healthcare institutions in Saudi Arabia were evaluated. The findings indicate that more efforts are needed by the SFDA to educate stakeholders about the importance of ADR reporting. The study recommends ADR electronic systems integration between the SFDA and healthcare institutions to improve the frequency and quality of ADR reports, and regular feedback on decisions made about ADR reports should be provided by the SFDA to stakeholders to improve their awareness of the importance of ADR reporting and enhance their contribution to PV and ADR reporting process.