bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design and Management of a Photovoltaic Pumping System
Authors: Zakaria Layate , Tahar Bahi 
Published: May 2023

Solar energy is recognized as one of the most important renewable alternatives to electricity, especially in remote areas where solar energy is not available due to high line costs. This innovative and sustainable solution is becoming increasingly popular in many parts of the world due to its environmental and economic benefits.
The purpose of this research is to study water pumping using photovoltaic energy. Optimization algorithms are used to track the maximum power point and apply it to control step-ups in order to operate the photovoltaic system at maximum capacity and predict the impact of climate change on system performances. Powering the converter, powering the frequency converter and analysis of motor pump operation under the influence of climate change is presented and discussed however the control system credibility and effectiveness is proved by simulation results under MatLab/Simulink software.
Evaluación de la biodiversidad en cinco comunidades Kichwa de la zona de colonización de la alta Amazonía ecuatoriana
Authors: Arias Gutiérrez Ruth Irene , Tapia Alejandra , Tapia Andrés , Santacruz Lina , Yasaca Rovin , Miranda Nelson 
Published: May 2023

El presente trabajo es una contribución al proceso de legalización de territorios comunitarios del Pueblo Originario Kichwa del Cantón Santa Clara (PONAKICSC). Tiene como propósito establecer el estado de conservación de la biodiversidad en remanentes naturales del pie de monte amazónico de cinco comunidades Kichwa distribuidas dentro del área de colonización de los cantones Santa Clara, Mera, Pastaza y Arosemena Tola, provincias de Pastaza y Napo, en la zona de amortiguamiento del Parque Nacional Llanganates. Se aplicaron procesos participativos y recorridos de campo en la zona de estudio. Se realizó la georreferenciación de límites territoriales ancestrales, sitios de interés cultural y puntos de muestreo de fauna y flora; en éstos se hicieron inventarios taxonómicos de flora y fauna (mamíferos y aves) que fueron comparados con los de una comunidad amazónica Kichwa de la selva baja, tomada como control. Además, se elaboraron mapas en Sistemas de Información Geográfica (SIG) para procesos de legalización de territorios comunitarios. Los resultados indican un buen estado de conservación de la biodiversidad amazónica; la comunidad con mayor concentración de mamíferos fue Chontayaku con 38 especies pertenecientes a 34 géneros, 18 familias y 7 órdenes; en aves, Kushillu Urku registró 62 especies, 58 géneros, 27 familias y 14 órdenes zoológicos. En los inventarios florísticos, el mayor registro correspondió a Rey del Oriente con 508 especies, 304 géneros, 109 familias, incluyendo una especie endémica: Burmeistera refracta. La discusión de los resultados se complementó con diagnósticos socio-económicos participativos, y se determinó una zonificación y una normativa comunitarias de uso del territorio.
INFLUÊNCIA DO EMISSOR PRODUZIDO COM REDUÇÃO DE ETAPAS TÉRMICAS NOS PARÂMETROS ELÉTRICOS DE CÉLULAS SOLARES BIFACIAIS BASE N
Authors: Zanesco Izete , André Biazetto Fábio , Braz Vanzetto Andrielen , Dos Santos Kochenborger Augusto , Pereira dos Reis Estéfane , Moehlecke Adriano 
Published: May 2023

As células solares bifaciais fabricadas em lâminas de silício cristalino tipo n apresentam potencial de obtenção de maior eficiência e bifacialidade próxima a um. Com este foco, o objetivo deste artigo é analisar a influência do método de formação do emissor produzido na mesma etapa térmica que o campo retrodifusor nos parâmetros elétricos de células solares bifaciais base n com estrutura PERT e passivação das superfícies com SiO2. Foi utilizado o método de spin-on e a difusão do boro foi realizada em forno convencional, seguida da difusão do fósforo com POCl3. Variou-se a temperatura de difusão de boro e analisou-se a resistência de folha do emissor e do campo retrodifusor dopado com fósforo bem como a influência nos parâmetros elétricos das células solares bifaciais. Verificou-se que a resistência de folha do emissor de boro diminuiu de (116 ± 6) Ω/sq para (64 ± 2) Ω/sq com o aumento da temperatura de difusão de boro de 940 °C a 980 °C. Porém, a resistência de folha do campo retrodifusor de fósforo aumentou, indicando que a difusão de boro afeta a região dopada com fósforo. As maiores eficiências, de 15,3% e 15,5 % com irradiância no emissor e campo retrodifusor, respectivamente, foi alcançada com a temperatura de difusão de 960 °C. Neste dispositivo, a bifacialidade foi de 0,987. Constatou-se que a tensão de circuito aberto foi maior com irradiância no emissor, independente da temperatura de processamento. Também se concluiu que a tensão de circuito aberto e o fator de forma cresceram até a temperatura de processamento de 960 °C, independente do modo de iluminação. Porém, a densidade de corrente de curto-circuito com irradiância no emissor tendeu a diminuir, devido ao aumento da recombinação dos portadores de carga minoritários. O fator de forma foi o parâmetro elétrico que mais influenciou na eficiência.
Analisa Respon Steady dan Transient pada Sistem Mekanik Pegas Ganda serta Terapan Metode PID Memanfaatkan Transformasi Laplace dan Simulink Matlab
Authors: Laalobang Sriwiana , Warsito Ali , Pingak Redi K. 
Published: May 2023

Telah dilakukan simulasi sistem mekanik pegas ganda menggunakan simulink Matlab dengan tujuan menganalisa respon steady dan transisent pada sistem mekanik pegas ganda dengan menerapkan metode PID memanfaatkan transformasi laplace dan simulink matlab untuk menghasilkan suatu sistem yang stabil. Ketidakstabilan sistem diketahui melalui analisa respon sistem terhadap waktu yaitu respon steady dan respon transient, dimana steady-state error cukup rendah yaitu 2% tetapi respon transient menunjukkan rise time = 5.27 sekon, settling time = 6.27 sekon dan banyak terjadi overshoot. Untuk mendapatkan sistem mekanik pegas ganda yang stabil, fungsi transfer dari persamaan gerak sistem yang telah ditransformasikan dengan transformasi Laplace ke dalam persamaan berdomain s, perlu diformulasikan sebagai representasi sistem kontrol close loop yang memuat variasi metode PID (Proporsional, Integral dan Derivatif). Variasi ini kemudian disimulasikan dengan memberikan input pada konstanta Kp, Ki dan Kd. Hasil simulasi menunjukkan bahwa proses kontrol pada sistem mekanik menghasilkan sistem yang cukup stabil dan terjaga ketika menggunakan metode PD dan PID. Dengan metode PID sistem mencapai kestabilan pada t = 0.01 sekon, dimana nilai Kp = , Ki = dan Kd = , dengan rise time 0.004 sekon, settling time 0.005 sekon dan tidak ada error keadaan tunak.
Penentuan Sifat Optik Senyawa Hasil Ekstraksi Daun Kemiri (Aleurites Moluccana, (L.) Wild) Asal Desa Fohoeka Kecamatan Nanaet Duabesi Kabupaten Belu
Authors: Lau Yeremina , Bukit Minsyahril , Z. Johannes Albert , Warsito Ali 
Published: May 2023

Telah dilakukan penelitian tentang penentuan sifat optik senyawa hasil ekstraksi daun kemiri (Aleurites Moluccana, (L.) Wild) asal Desa Fohoeka Kecamatan Nanaet Duabesi Kabupaten Belu. Tujuan penelitian ini adalah menentukan jangkauan serapan, celah energi, koefisien serapan, dan indeks bias dari senyawa hasil ekstraksi daun kemiri. Daun kemiri dikeringkan, diekstraksi secara maserasi dan dievaporasi. Hasil evaporasi dilarutkan dengan pelarut etanol 70% untuk dianalisis pada spektrofotometer UV-Vis. Konsentrasi yang digunakan dalam analisis spektrofotometer Uv-Vis adalah 100 ppm, 200 ppm, dan 300 ppm. Berdasarkan analisis spektrofotometer UV-Vis, jangkauan serapan daun kemiri adalah 200 nm-400 nm. Nilai celah energi yang diperoleh adalah 3,2 eV. Nilai koefisien serapan sebesar 793,3 m-1. Hasil perhitungan indeks bias riil senyawa hasil ekstraksi daun kemiri masing-masing konsentrasi yaitu 100 ppm, 200 ppm, dan 300 ppm adalah 0.8 serta nilai indeks bias imajinernya adalah 0.24, 0.69, dan 1.22. Berdasarkan hasil analisis senyawa hasil ekstraksi daun kemiri memilikipotensi yang digunakan dalam pembuatan sel surya berbasis organik.
Kata Kunci : Daun kemiri, Sifat optik, Spektrofotometer UV-Vis, indeks bias, jangkauan serapan
Model Pembelajaran Kumon untuk Meningkatkan Prestasi Belajar Siswa
Authors: K. Berebein Dian , Sukarjita I Wayan , Lantik Vinsensius Lantik 
Published: May 2023

Model pembelajaran Kumon adalah model pembelajaran dengan mengaitkan antar konsep, keterampilan, kerja individual dan menjaga suasana nyaman dan menyenangkan. Bahan pelajarannya dirancang sehingga siswa dapat mengerjakan dengan kemampuannya sendiri, bahkan memungkinkan bagi anak untuk mempelajari bahan pelajaran di atas tingkatan kelasnya di sekolah. Penelitian ini bertujuan untuk mengetahui cara meningkatkan prestasi belajar fisika siswa dengan menerapkan model pembelajaran Kumon.
Penelitian ini merupakan jenis Penelitian Tindakan Kelas (PTK) yang dilaksanakan dalam dua siklus. Pelaksanaan tindakan pada setiap siklus dilakukan dengan melalui prosedur perencanaan, pelaksanaan tindakan, observasi, evaluasi dan refleksi. Penelitian ini dilaksanakan di SMP Negeri 5 Kota Kupang dengan banyak subyek penelitian 26 orang. Instrumen yang digunakan pada penelitian diantaranya instrumen pembelajaran dan lembar observasi. Hasil tes prestasi belajar yang diperoleh siswa per indikator antara lain: Indikator 1 telah mencapai ketuntasan dengan ketuntasan 100,00% dan nilai rerata 100,00%; Indikator 2 (telah mencapai ketuntasan dengan ketuntasan 92,31% dan nilai rerata 79,81%; Indikator telah mencapai ketuntasan dengan ketuntasan 61,54% dan nilai rerata 72,31% pada siklus I dan mencapai ketuntasan 83,1 % dan nilai rerata 96,15% pada siklus II; Indikator 4 telah mencapai ketuntasan dengan ketuntasan 88,46% dan nilai rerata 83,52% dan Indikator 5 telah mencapai ketuntasan dengan ketuntasan 63,58% dan nilai rerata 77,56% pada siklus I dan mencapai ketuntasan 85,26% dan nilai rerata 92,31% pada siklus II.
Pengaruh Kecerdasan Emosional Terhadap Hasil Belajar Kognitif Fisika Studi Kasus Siswa SMAN 7 Kupang
Authors: Bria Gothelma 
Published: May 2023

Tujuan dalam penelitian ini adalah untuk mengetahui apakah terdapat pengaruh yang signifikan antara kecerdasan emosional terhadap hasil belajar fisika siswa SMA Negeri 7 Kupang. Jenis penelitian ini yaitu penelitian deskriptif kuantitatif dengan subjek penelitian siswa kelas SMA Negeri 7 Kupang yang berjumlah 31 orang. Subjek dalam penelitian ini ditentukan dengan menggunakan teknik purpose sampling. Teknik analisis data menggunakan analisis statistik deskriptif dan analisis statistik inferensial. Hasil penelitian menunjukkan rata-rata skor kecerdasan emosional untuk 31 peserta didik adalah 66,8. Sedangkan berdasarkan hasil analisis inferensial diperoleh persamaan regresi Y= 72,645+0,265X dengan sehingga ada pengaruh yang signifikan antara kecerdasan emosional terhadap hasil belajar fisika peserta didik kelas SMA Negeri 7 Kupang.
Pengaruh Lama Variasi Waktu Perendaman Klorofil Ekstrak Pewarna Alami Terhadap Efisiensi Dye Sensitizer Solar Cell (DSSC)
Authors: Pote Fernince , Lipikuni Hilary F , Olla Angelikus 
Published: May 2023

Energi yang berasal dari fosil semakin berkurang dan tidak dapat diperbaharui. Oleh karena itu banyak para ahli mencari alternatif lain untuk menciptakan energi baru yang bersifat renewable, dan Dye-Sensitized Solar Cell (DSSC) merupakan salah satunya. Penelitian ini bertujuan untuk Mengetahui karakterisasi sifat kelistrikan material dye alami yang di ekstrak dari daun Bayam (dye Amaranthus) yang telah dipreparasi dalam larutan ethanol sebagai sensitizer pada DSSC. Metode spin coating digunakan agar deposisi pada mendapatkan lapisan tipis yang homogen pada area aktif kaca FTO. Variasi waktu perendaman kaca FTO pada dye diuji karakterisasi menggunakan I-V Meter Elkahfi, UV-Vis dan I-V Keithley tipe A. Hasil absorbansi dye berada pada panjang gelombang dan juga terdapat pergeseran panjang gelombang dari dye. Efisiensi terbesar dari variasi waktu perendaman 12 jam pada klorofil dye Amaranthus yaitu . Efisiensi yang tinggi pada elektroda dari variasi waktu menunjukkan kinerja kerja yang baik pada Dye Sensitized Solar Cell.
Training of cadets, trainees and employees of the Department of Internal Affairs in the tactics of joint actions when working with offenders
Authors: Struganov Sergei Mikhailovich , Panov Evgenii Valentinovich , Katrina Marina Ivanovna , Gavrilov Dmitrii Anatol'evich 
Published: May 2023

In the article, the authors pays attention to issues related to the professional training of cadets, trainees, as well as employees undergoing initial training and retraining for joint actions when performing assigned operational and combat tasks. The legal and tactical aspects of the implementation of this training at the current stage of the development of the training program for internal affairs bodies in educational organizations of the Ministry of Internal Affairs of Russia are reflected. The approaches of scientific research conducted by some authors in this direction are considered and analyzed, as well as a number of recommendations for improving the system of teaching tactics of joint actions when working in units (groups) with offenders are presented. Summing up the general line under all of the above, it should be noted that such an aspect of training as working out joint actions by cadets and trainees when working with offenders is currently not implemented at the proper level within the framework of the general training program of the Department of Internal Affairs. In our opinion, it is necessary to integrate the positive experience of territorial divisions on the example of such events as simulators, often practiced in traffic police and PSP units, which consist in modeling the most popular situations of collision with offenders. In our opinion, the variability of approaches to teaching tactics of actions of cadets and trainees when working with offenders can be formed individually by each teacher, depending on the type and topic of the training session.
Relationships between locomotive and non-locomotive MVPA and ‘ikigai’ in older Japanese adults
Authors: Tsujishita Soma , Nagamatsu Masaki , Imai Aiko , Sanada Kiyoshi 
Published: May 2023

Objective
This study aimed to investigate the relationship between physical activity (PA) of moderate to vigorous intensity (MVPA) and ikigai in older Japanese adults. We evaluated the amount of PA using an activity meter equipped with a three-axis accelerometer. The measured activities were classified into locomotive PA and non-locomotive PA to clarify not only the relationship between MVPA and ikigai, but the types of activities that lead to increased ikigai as well.

Methods
Participants were 86 community-dwelling older adult Japanese men and women. Measurement items included basic information (age, sex, BMI, and the number of underlying diseases), PA, Self-completed Occupational Performance Index (SOPI), and ikigai (the K-1 Scale). Confounding factors presumed to be related to ikigai were also elicited from previous studies. Associations of ikigai into three groups (high, middle, and low) with PA were analyzed by group comparisons and multivariate analyses.

Results
The comparison of PA indices among the high, middle, and low ikigai groups revealed that non-locomotive MVPA is significantly associated with ikigai (p < 0.05). In multiple comparisons, the low ikigai group was significantly and negatively affected by non-locomotive MVPA (p < 0.05) compared to the middle and high ikigai groups. Furthermore, in a multivariate analysis with ikigai as the dependent variable and sex, age, locomotive MVPA, and non-locomotive MVPA as independent variables, only non-locomotive MVPA (p < 0.05) was associated.

Discussion
These results suggest that non-locomotive MVPA is effective in enhancing ikigai.
Solid Waste Management System in Enugu Metropolis, South-Eastern Municipality, Nigeria
Authors: J. Onyishi Chinedu , Elekwachi Wali, , O. Okwakpam Ikechi 
Published: May 2023

Waste management and characterization is a fundamental step for effective and sustainable waste management strategies in order to safeguard environmental health. This study investigated the working system of Municipal solid waste management system (MSWMS) in all the zones of Enugu metropolis both by residents and by the municipal authority- Enugu State Waste Management Authority ESWAMA). Enugu metropolis as a geographical entity has been zoned into: LGAs, zones, wards, layouts among others for a well structured questionnaire administration. Available records in the ESWAMA main office indicates that Enugu metropolis was divided into ten (10) zones based on their SWM coverage schedule. Findings revealed that the elements of MSWMS in the metropolis include: waste collection, transfer, separation, recycling, and disposal. Furthermore, the study revealed no form of solid waste separation before being dumped for transfer and disposal. The only form of recycling in the study area however is the done by the scavengers and their activities include: separation and selling of valuables recovered from solid waste dumpsites. Conclusively this study reveals that 30.7% (7.0% daily+23.7% 2-3days) of households are served within (1-3days) collection of SWs from dumpsites in their areas whereas 58.0% (31.3% 4days-1week+26.0% above 1week) said that collection of SWs at dumpster or at approved dumpsites delayed for 4days to over a week. The study recommends building cognizance on the need to sort waste from source before disposal and also inspire embracing of recycle and reuse of wastes to reduce wastes generated.
Mortality Among US Veterans Admitted to Community vs Veterans Health Administration Hospitals for COVID-19
Authors: Ohl Michael E. , Richardson Miell Kelly , Beck Brice F. , Mecham Bradley , Bailey George , Mengeling Michelle , Vaughan-Sarrazin Mary 
Published: May 2023

ImportanceVeterans Health Administration (VHA) enrollees receive care for COVID-19 in both VHA and non-VHA (ie, community) hospitals, but little is known about the frequency or outcomes of care for veterans with COVID-19 in VHA vs community hospitals.ObjectiveTo compare outcomes among veterans admitted for COVID-19 in VHA vs community hospitals.Design, Setting, and ParticipantsThis retrospective cohort study used VHA and Medicare data from March 1, 2020, to December 31, 2021, on hospitalizations for COVID-19 in 121 VHA and 4369 community hospitals in the US among a national cohort of veterans (aged ≥65 years) enrolled in both the VHA and Medicare with VHA care in the year prior to hospitalization for COVID-19 based on the primary diagnosis code.ExposureAdmission to VHA vs community hospitals.Main Outcomes and MeasuresThe main outcomes were 30-day mortality and 30-day readmission. Inverse probability of treatment weighting was used to balance observable patient characteristics (eg, demographic characteristics, comorbidity, mechanical ventilation on admission, area-level social vulnerability, distance to VHA vs community hospitals, and date of admission) between VHA and community hospitals.ResultsThe cohort included 64 856 veterans (mean [SD] age, 77.6 [8.0] years; 63 562 men [98.0%]) dually enrolled in the VHA and Medicare who were hospitalized for COVID-19. Most (47 821 [73.7%]) were admitted to community hospitals (36 362 [56.1%] admitted to community hospitals via Medicare, 11 459 [17.7%] admitted to community hospitals reimbursed via VHA’s Care in the Community program, and 17 035 [26.3%] admitted to VHA hospitals). Admission to community hospitals was associated with higher unadjusted and risk-adjusted 30-day mortality compared with admission to VHA hospitals (crude mortality, 12 951 of 47 821 [27.1%] vs 3021 of 17 035 [17.7%]; P &amp;lt; .001; risk-adjusted odds ratio, 1.37 [95% CI, 1.21-1.55]; P &amp;lt; .001). Readmission within 30 days was less common after admission to community compared with VHA hospitals (4898 of 38 576 [12.7%] vs 2006 of 14 357 [14.0%]; risk-adjusted hazard ratio, 0.89 [95% CI, 0.86-0.92]; P &amp;lt; .001).Conclusions and RelevanceThis study found that most hospitalizations for COVID-19 among VHA enrollees aged 65 years or older were in community hospitals and that veterans experienced higher mortality in community hospitals than in VHA hospitals. The VHA must understand the sources of the mortality difference to plan care for VHA enrollees during future COVID-19 surges and the next pandemic.
Factors Associated With Cognitive Improvement After Bariatric Surgery Among Patients With Severe Obesity in the Netherlands
Authors: Vreeken Debby , Seidel Florine , Custers Emma M. , Olsthoorn Lisette , Cools Sophie , Aarts Edo O. , Kleemann Robert , Kessels Roy P. C. , Wiesmann Maximilian , Hazebroek Eric J. , Kiliaan Amanda J. 
Published: May 2023

ImportanceBariatric surgery–induced weight loss is often associated with improved cognitive function. However, improvement in cognitive function is not always exhibited by all patients, and the mechanisms behind cognitive improvement remain unknown.ObjectiveTo investigate the association of changes in adipokines, inflammatory factors, mood, and physical activity with alterations in cognitive function after bariatric surgery among patients with severe obesity.Design, Setting, and ParticipantsThis cohort study included 156 patients with severe obesity (body mass index [calculated as weight in kilograms divided by height in meters squared], &amp;gt;35) eligible for Roux-en-Y gastric bypass, aged between 35 and 55 years, who were enrolled in the BARICO (Bariatric Surgery Rijnstate and Radboudumc Neuroimaging and Cognition in Obesity) study between September 1, 2018, and December 31, 2020. Follow-up was completed July 31, 2021; 146 participants completed the 6-month follow-up and were included in the analysis.InterventionRoux-en-Y gastric bypass.Main Outcomes and MeasuresOverall cognitive performance (based on a 20% change index of the compound z score), inflammatory factors (eg, C-reactive protein and interleukin 6 levels), adipokines (eg, leptin and adiponectin levels), mood (assessed via the Beck Depression Inventory), and physical activity (assessed with the Baecke questionnaire).ResultsA total of 146 patients (mean [SD] age, 46.1 [5.7] years; 124 women [84.9%]) completed the 6-month follow-up and were included. After bariatric surgery, all plasma levels of inflammatory markers, including C-reactive protein (median change, −0.32 mg/dL [IQR, –0.57 to –0.16 mg/dL]; P &amp;lt; .001) and leptin (median change, −51.5 pg/mL [IQR, –68.0 to –38.4 pg/mL]; P &amp;lt; .001), were lower, whereas adiponectin levels were higher (median change, 0.15 μg/mL [IQR, –0.20 to 0.62 µg/mL]; P &amp;lt; .001), depressive symptoms were (partly) resolved (median change in Beck Depression Inventory score, −3 [IQR, –6 to 0]; P &amp;lt; .001), and physical activity level was higher (mean [SD] change in Baecke score, 0.7 [1.1]; P &amp;lt; .001). Cognitive improvement was observed in 43.8% (57 of 130) of the participants overall. This group had lower C-reactive protein (0.11 vs 0.24 mg/dL; P = .04) and leptin levels (11.8 vs 14.5 pg/mL; P = .04) and fewer depressive symptoms at 6 months (4 vs 5; P = .045) compared with the group of participants who did not show cognitive improvement.Conclusions and RelevanceThis study suggests that lower C-reactive protein and leptin levels, as well as fewer depressive symptoms, might partly explain the mechanisms behind cognitive improvement after bariatric surgery.