bluuebunny/crossref_metadata_2025 huggingface dataset:
Characteristics of Ceramic Coatings Made by Thin Film Low Pressure Plasma Spraying (LPPS-TF)
Authors: Hospach A. , Mauer G. , Vaßen R. , Stöver D.
Published: November 2022

The thin film low pressure plasma spray process (LPPS-TF) has been developed with the aim of efficient depositing uniform and thin coatings with large area coverage by plasma spraying. At high power input (~150 kW) and very low pressure (~100 Pa) the plasma jet properties change considerably and it is even possible to evaporate the powder feedstock material providing advanced microstructures of the deposits. This relatively new technique bridges the gap between conventional plasma spraying and physical vapor deposition. In addition, the resulting microstructures are unique and can hardly be obtained by other processes. In this paper, microstructures made by LPPS-TF are shown and the columnar layer growth by vapor deposition is demonstrated. In addition to the ceramic materials TiO2, Al2O3 or MgAl2O4, the focus of the research was laid on partially yttria-stabilized zirconia. Variations of the microstructures are shown and discussed concerning potential coating applications.
Comparative Characteristics of Coatings Produced from Sn-Sb-Cu Babbitt by Arc Spraying, Gas Surfacing and Pouring
Authors: Korobov Yu. , Nevezhin S. , Potechin B. , Ilushin V. , Gogolev L.
Published: November 2022

Babbitt surfacing is used in tribological applications because of its low friction coefficient. Thermal spray surfacing and pouring are two widely used production processes for Babbitted parts. This paper presents a comparative analysis of structures and friction properties of Sn-Sb-Cu Babbitt layers produced by these techniques. The sprayed Babbitt coatings were produced by arc spraying of 1.6 and 3 mm diameter wire.
Evaluation of the Elastic and Plastic Contact Wear Performance of Plasma and Flame Sprayed 13 and 45 wt% TiO2 Alumina-Titania Coatings
Authors: Vargas F. , Ageorges H. , Fauchais P. , Lopez M. E.
Published: November 2022

Atmospheric plasma and oxy-acetylene flame were used to spray alumina-titania micrometer sized particles with respectively 13 wt.% and 45 wt.% of TiO2 (AT-13 and AT-45). Plasma spraying was also used to spray nanometer-sized- agglomerated particles (AT-13). The enthalpy of spray guns was varied to achieve coatings with different phases and structural characteristics. The influence of the different structural characteristics and the phases of coatings on their hardness and tribological behavior was then studied. The wear resistance was determined by dry elastic contact between an alumina ball, 6 mm in diameter, and the polished coated discs. The ball was moved at a linear speed of 0.1 m/s under a load of 5 N during 20,000 cycles. Drilling tests between a steel drill bit, 12.5 mm in diameter, and the coating surface were also carried out in order to determine the wear resistance under plastic contact. The wear test results showed that AT-13 coatings were more resistant than the AT-45 ones, which was due to the presence of α and γ alumina, phases presenting a high mechanical resistance. On the contrary the resistance of AT-45 coatings, consisting of Al2TiO5 and Al6Ti2O13 brittle phases of low hardness, was poorer. Under elastic contact the reduction of the wear resistance of coatings elaborated by flame spraying was not obvious, but under plastic contact the plasma sprayed coatings were more resistant than those deposited by oxy-acetylene flame.
Microstructure and Wear Resistance of Arc-Sprayed NiCrBSi Coatings after Remelting
Authors: Tillmann W. , Luo W.
Published: November 2022

The anti-wear coatings in this study are developed for the use in forming tools, which need a good resistance against different wear mechanisms such as surface fatigue, adhesion and abrasion. NiCrBSi is suitable for this purpose because of its high resistance against different types of wear at ambient and high temperatures. Due to the low thermal and kinetic energy during the spraying process, the arc-sprayed NiCrBSi coating shows a high interlaminar boundary porosity as well as numerous interface cracks between the coating and the substrate, which can reduce the wear resistance and the adhesion to the substrate. In this work, arc-sprayed NiCrBSi coating were remelted by a treatment with an oxyacetylene flame, induction heating, furnace and laser. The treatment parameters were investigated and optimized. The modified microstructure was characterized using an optical microscope and a scanning electron microscope as wells as an EDS analysis. The hardness of the coatings was evaluated before and after remelting. To examine various wear mechanisms, pin-on-disc tests were conducted with different wear counterpart. The wear and coefficients of the as-sprayed and remelted coating were determined. In order to show the change of the wear resistance as well as the wear mechanisms, wear tracks were characterized with a scanning electron microscope.
Properties of HVOF Sprayed WC-Co Coatings after ESD Process
Authors: Żórawski W. , Radek N.
Published: November 2022

HVOF sprayed coatings are widely used to improve the service life of machines components. Influence of spraying parameters and different kinds of materials on coatings properties have been investigated in many works. Our investigations concern properties of HVOF sprayed two tungsten carbide coatings after applying electrospark deposition process (ESD). After finishing microstructure of sprayed coatings were changed by applying tungsten carbide electrode. Changes of microstructure and properties of the sprayed and post ESD process coatings were analysed with a scanning microscope JOEL JSM-5400. The element distribution was analysed with a microprobe ISIS 300 Oxford Instruments whereas phase composition was analysed by diffractometer D8 Advance (BRUKER). The roughness of coatings was measured with Talysurf-4, whereas Matuzawa MMT-X3A was used to study changes of their hardness. Ball on disc tester and dry abrasive rubber wheel tester were applied to estimate coefficient of friction and wear resistance of sprayed coatings before and after EDM process.
The Impact of Managerial and Principal Academic Supervision on Teacher Performance
Authors: Zohriah Anis , Fauzi Anis , Pandini Intan Rahman
Published: November 2022

Supervision is carried out in the context of mentoring, directing, and coaching toward improving teacher performance more optimally. This study aims to determine how managerial and principal academic supervision affect teacher performance in private junior high schools in the Tigaraksa District of the Tangerang Regency. This study uses correlational and regression analysis, which are both types of quantitative research methods. The population comprises 41 teachers, three principals, and one supervisor, for a total of 45 respondents. This study takes a sample of the whole population, which is the whole population. With a 97% contribution, the results showed that managerial supervision greatly improved teacher performance. The study's development shows that the principal's academic control has a significant effect on improving teacher performance, with a contribution of 88%, and that the supervisor's managerial supervision and the principal's visionary leadership have a substantial impact on improving teacher performance, with a contribution of 91%.
The Effect of Spiritual Leadership and Psychological Empowerment on Employee Performance
Authors: Rahmatika Arivatu Ni'mati , Ma'arif Samsul , Kholifah Siti
Published: November 2022

This article aimed to examine and analyze the effect of Spiritual Leadership and Psychological Empowerment on Employee Performance. Respondents were leaders or employees at YPPBU (Bahrul Ulum Islamic Boarding School Foundation) Jombang, totalling 64 respondents. Data were analyzed using Partial Least Square (PLS) with SmartPLS software version 3.0 and the relationship between variables. The results showed that Spiritual Leadership had no significant effect on Employee Performance (T Statistics: 0.925, P Values: 0.355). Psychological Empowerment has a considerable impact on Employee Performance (T statistic: 7,790, P Values: 0.000). Spiritual Leadership has a significant effect on Psychological Empowerment (T Statistics: 6,531, P Values: 0.000). Furthermore, Spiritual Leadership and Psychological Empowerment have no specific considerable impact on Employee Performance (T Statistics: 3,966, P Values: 0.000). Psychological Empowerment has a mediating role on Spiritual Leadership to Employee performance. The Spiritual Leadership and Psychological Empowerment felt by YPPBU's Leaders or Employees are directly proportional to the resulting performance. Changes in Spiritual Leadership and Psychological Empowerment will also affect Employee Performance.
MODERN TRENDS IN DEVELOPMENT OF LOGISTICS MARKET
Authors: ZAGURSKIY O.
Published: November 2022

. In logistics, analytical, technological and marketing paradigms are being replaced by an integrated (logistics) paradigm, which goes beyond the problems of optimizing the business processes of an individual enterprise and involves the integration of individual enterprises into supply chains to improve management processes and increase the overall efficiency of their business. The article provides a theoretical and methodological justification for the influence of institutional and technological factors on the transformation of the logistics market in modern conditions. It defines that the mutual influence of institutional and technological factors forms in logistics the specifics of multi-channel supply networks, which have a fundamentally different more complex market mechanics, and also form a new institutional framework of trade and logistics infrastructure of multichannel supply of modern consumer market. It has been proven that the development of ecommerce creates new institutional conditions and encourages changes in corporate governance strategies and consumer behavior, and the dominant type of institutional agreements imposes certain restrictions on determining the needs, preferences and choices of agents, thus stimulating the development of even more modern technologies.
SIMULATION OF TRANSITIONAL PROCESSES OF DYNAMIC MODEL OF POWER ENERGY INSTALLATION OF MACHINES FOR FORESTRY WORKS
Authors: TITOVA L.
Published: November 2022

The article is devoted to the study and generalization of the principles of software development dynamic model of automotive tractor engines internal combustion engines (ICE). The structured model engine dynamics and defined criteria for identifying model with the object. Formal description of the expert object (EO) includes a functional diagram of the internal combustion engine that characterizes its parameters and operators that establishing the appropriate relationship between these parameters. The dynamic model is based on the known ICE equations in moments. For modeling were used differential equations of speed and acceleration of the crankshaft in static and dynamic modes. The transient characteristics, amplitude-frequency and energy spectra are determined. An example of modeling transient processes using the Simulink package Matlab package in the event of malfunctions in individual cylinders.
Mortality Classification of Hospitalized COVID-19 Patients in Zambia Using Machine Learning
Authors: Mulenga Clyde , Kaonga Patrick , Musonda Patrick
Published: November 2022

The Corona Virus Disease 2019 (COVID-19) has wreaked havoc globally, resulting in millions of cases and deaths. The objective of this study was to predict mortality in hospitalized COVID-19 patients in Zambia using machine learning (ML) methods based on factors that have been shown to be predictive of mortality and thereby improve pandemic preparedness. This research employed seven powerful ML models that included: decision tree (DT), random forest (RF), support vector machines (SVM), logistic regression (LR), naïve bayes (NB), gradient boosting (GB), and XGBoost (XGB). These classifiers were trained on 1,433 hospitalized COVID-19 patients from various health facilities in Zambia. The performances achieved by these models were checked using accuracy, recall, F1-Score, area under the receiver operating characteristic curve (ROC_AUC), area under the precision-recall curve (PRC_AUC), and other metrics. The best performing model was the XGB which had accuracy of 92.3%, recall of 94.2%, F1-Score of 92.4%, and ROC_AUC of 97.5%. The pairwise Mann-Whitney U-test analysis showed that the second-best model (GB) and the third-best model (RF) did not perform significantly worse than the best model (XGB) and had the following: GB had accuracy of 91.7%, recall of 94.2%, F1-Score of 91.9%, and ROC_AUC of 97.1%. RF had accuracy of 90.8%, recall of 93.6%, F1-Score of 91.0%, and ROC_AUC of 96.8%. Other models showed similar results for the same metrics checked. The study successfully derived and validated the selected ML models and predicted mortality effectively with reasonably high performance in the stated metrics. The feature importance analysis found that knowledge of underlying health conditions about patients’ hospital length of stay (LOS), white blood cell count, age, and other factors can help healthcare providers offer lifesaving services on time, improve pandemic preparedness and decongest health facilities in Zambia and other countries with similar settings.
KAJIAN ETNOFISIKA PADA TARI SOYA-SOYA SEBAGAI SUMBER AJAR FISIKA
Authors: Astuti Irnin Agustina Dwi , Sumarni Ria Asep , Setiadi Irawan , Zahra Rachma Azkia
Published: November 2022

ABSTRAKIndonesia yang memiliki wilayah sangat luas dan memiliki banyak pulau diiringi dengan keanekaragamannya maka Indonesia dikaruniai banyak kearifan lokal. Pelajaran fisika yang rumit untuk dipahami oleh siswa, karena fisika merupakan salah satu mata pelajaran yang dibutuhkan pemahaman konsep antara teori dan penerapan pada kehidupan sehari-hari. Penyajian guru dalam memberikan sebuah materi fisika dan mampu menciptakan suasana kegiatan belajar mengajar interaktif mampu memberikan kesan baik terhadap peserta didik dalam belajar fisika. Tarian daerah sangat kental dengan kearifan lokal daerah tersebut, salah satunya tarian khas Kota Ternate yaitu tari Soya-soya. Maka perlu dikaitkan dengan kegiatan belajar mengajar agar mencegah hilangnya pengetahuan peserta didik tentang kearifan lokal dan mampu mengimplementasikan materi fisika dalam kehidupan sehari-hari maka perlu adanya pengembangan metode pembelajaran, salah satunya dengan menggunakan pendekatan etnofisika. Metode penelitian  berupa literature  review. Teknik pengumpulan data berupa kajian literatur. Berdasarkan hasil dan pembahasan di atas dapat disimpulkan bahwa setiap gerakan yang dilakukan oleh sang penari Soya-Soya dapat dikaji secara fisika dengan berbagai konsep fisika yang dapat digunakan sebagai bahan ajar fisika di sekolah yang mampu mengasah peserta didik menjadi kreatif dan mampu mengimplementasikan materi dalam kehidupan sehari-hari. Kata kunci: etnofisika; sumber ajar fisika; kearifan local; tari soya-soya. ABSTRACTIndonesia, which has a very large area and has many islands accompanied by its diversity, Indonesia is blessed with a lot of local wisdom. Physics lessons are complicated for students to understand, because physics is one of the subjects that requires understanding the concept between theory and application to everyday life. The presentation of teachers in providing physics material and being able to create an atmosphere of interactive teaching and learning activities is able to give a good impression on students in learning physics. Regional dances are very thick with the local wisdom of the area. One of them is the typical dance of Ternate City, namely the Soya-soya dance. So it needs to be related to teaching and learning activities in order to prevent the loss of knowledge of students about local wisdom and be able to implement physics material in daily life, it is necessary to develop learning methods, one of which is by using an ethnophysical approach. Data collection techniques in the form of literature studies and interviews. Based on the results and discussion above, it can be concluded that every movement performed by the Dancer Soya-Soya can be studied in physics with various physics concepts that can be used as physics teaching materials in schools that are able to hone students to be creative and able to implement the material in daily life. Keywords: ethnophysics; physics teaching resources; local wisdom; soya-soya dance.
ANALISIS SUSEPTIBILITAS MAGNETIK TANAH TPA ANTANG MAKASSAR BERDASARKAN KEDALAMAN
Authors: Mulyana Mulyana , Tiwow Vistarani Arini , Sulistiawaty Sulistiawaty
Published: November 2022

ABSTRAKAnalisis suseptibilitas magnetik pada tanah di TPA Antang Makassar berdasarkan kedalaman telah dilakukan. Studi ini bertujuan untuk menganalisis jenis mineral magnetik, domain magnetik, dan sumber mineral magnetik. Suseptibilitas magnetik diukur menggunakan alat Bartington MS2 Magnetic Susceptibility Meter dengan sensor MS2B yang bekerja pada dua frekuensi. Pengukuran suseptibilitas magnetik dilakukan dengan mengambil sampel pada lima titik dengan variasi kedalaman hingga 0-80 cm dari permukaan tanah. Hasil pengukuran menunjukkan bahwa nilai suseptibilitas magnetik di TPA Antang bervariasi 2,097  m3/kg hingga 33,523  m3/kg dan suseptibilitas magnetik bergantung frekuensi pada rentangan 2,51% hingga 6,51%. Sampel tanah diindikasikan mengandung mineral magnetik yang bersifat antiferomagnetik dan paramagnetik. Domain magnetik pada sampel tanah adalah superparamagnetik (SP) dan stable single domain (SSD). Sumber mineral magnetik dominan berasal dari aktivitas manusia (antropogenik). Kata kunci: TPA; tanah; suseptibilitas magnetik; mineral magnetik; antropogenik. ABSTRACTMagnetic susceptibility analysis of soil at TPA Antang Makassar based on depth has been carried out. This study aims to analyze the types of magnetic minerals, magnetic domains, and sources of magnetic minerals. Magnetic susceptibility was measured using a Bartington MS2 Magnetic Susceptibility Meter with an MS2B sensor that works on two frequencies. Magnetic susceptibility measurements were carried out by taking samples at five points with depth variations up to 0-80 cm from the ground surface. Measurement results show that the magnetic susceptibility values in Antang landfill varied from 2.097  m3/kg to 33.523  m3/kg and the magnetic susceptibility was frequency dependent in the range of 2.51% to 6.51%. Soil samples are indicated to contain magnetic minerals that are antiferromagnetic and paramagnetic. The magnetic domains in the soil samples are superparamagnetic (SP) and stable single domain (SSD). The dominant source of magnetic minerals comes from human activities (anthropogenic). Keywords: landfill; soil; magnetic susceptibility; magnetic mineral; anthropogenic.
AKTIVITAS SISWA DALAM KEGIATAN ASESMEN PADA PEMBELAJARAN DARING DAN HASIL BELAJAR FISIKA DI SMA
Authors: Pakaya Elvira Ariyanto , Umar Masri Kudrat , Supartin Supartin , Arbie Asri , Setiawan Dewa Gede Eka , Payu Citron S.
Published: November 2022

ABSTRAKPenelitian ini bertujuan untuk mengetahui dan melihat aktivitas siswa saat kegiatan asesmen dan hasil belajar siswa pada pembelajaran daring pada materi gejala pemanasan global di kelas XI IPA SMA Negeri 1 Kabila, SMA Negeri 1 Tapa, dan SMA Negeri 1 Suwawa. Metode penelitian yang digunakan adalah deskriptif kuantitatif. Subjek penelitian sebanyak 314 siswa kelas XI IPA. Teknik pengumpulan data menggunakan angket dan tes hasil belajar. Teknik analisis data menggunakan analisis secara deskriptif dan analisis kuantitatif. Hasil penelitian ini menunjukan bahwa aktivitas siswa dalam kegiatan asesmen pada pembelajaran daring materi gejala pemanasan global di kelas XI  IPA, berdasarkan  indikator persiapan dan pelaksanaan dapat dilihat mendapapatkan nilai presentase sebesar 71.06% dengan kriteria cukup baik dan indikator pelaksanaan diperoleh presentase sebesar 67.42% dengan kriteria cukup baik. Hal ini menunjukan bahwa rata-rata peserta didik di 3 sekolah setuju dengan pentingnya kesiapan diri sebelum dan saat kegiatan asesmen dilakukan. Hasil belajar siswa di ketiga sekolah rata-rata berada diatas nilai KKM (75). Untuk nilai rata-rata hasil belajar di SMA Negeri 1 Kabila 77.30, SMA Negeri 1 Tapa 79, dan SMA Negeri 1 Suwawa 76.08. Kata kunci: aktivitas asesmen; pembelajaran daring; hasil belajar. ABSTRACTThis study aims to find out and see the student activities when assessment activities and student learning outcomes in online learning on global warming symptom material in class XI IPA SMA Negeri 1 Kabila, SMA Negeri 1 Tapa, and SMA Negeri 1 Suwawa. The research method used is descriptive quantitative. The research subjects were 314 students of class XI science. Data collection techniques using questionnaires and learning outcomes tests. The data analysis technique used descriptive analysis and quantitative analysis. The results of this study indicate that the assessment activity in online learning material on global warming symptoms in class XI IPA, based on the preparation and implementation indicators, can be seen to get a percentage value of 71.06% with good enough criteria and implementation indicators get a percentage of 67.42% with good enough criteria. This shows that the average student in 3 schools agrees with the importance of self- preparation before and during assessment activities. The average student learning outcomes in the three schools are above the KKM score (75). For the average value of learning outcomes at SMA Negeri 1 Kabila 77.30, SMA Negeri 1 Tapa 79, and SMA Negeri 1 Suwawa 76.08. Keywords: assessment activity; online learning; learning outcomes.
KAJIAN KINEMATIKA GERAK PADA GERAK KENDARAAN BERMOTOR DI JALAN KABUPATEN NGAWI SEBAGAI SUMBER BELAJAR FISIKA
Authors: Ruspitasari Heni , Supeno Supeno , Yushardi Yushardi
Published: November 2022

ABSTRAKPenelitian ini membahas tentang fenomena gerak kendaraan bermotor di jalan Kabupaten Ngawi yang dapat dioptimalkan menjadi sumber belajar fisika SMA. Tujuan penelitian ini adalah mengkaji karakteristik besaran dinamis dan karakteristik jenis gerak pada gerak kendaraan di jalan Kabupaten Ngawi serta pemanfaatannya sebagai desain sumber belajar fisika. Jenis penelitian yang digunakan adalah penelitian kuantitatif dengan metode survei. Penelitian ini dilakukan dengan cara mengukur kecepatan, jarak tempuh dan waktu tempuh kendaraan sepeda motor saat melintasi jalan menurun. Selanjutnya dilakukan interpretasi data dalam bentuk grafik. Hasil kajian karakteristik jenis gerak pada gerak kendaraan di jalan Kabupaten Ngawi menunjukkan bahwa karakteristik jenis gerak pada gerak kendaraan di jalan menurun di kabupaten ngawi adalah jenis gerak lurus berubah beraturan (GLBB) dipercepat, sedangkan karakteristik jenis gerak pada gerak kendaraan di jalan mendatar setelah melintasi lintasan menurun adalah jenis gerak lurus berubah beraturan (GLBB) diperlambat. Hasil kajian kinematika digunakan sebagai data utama rancangan sumber belajar yang berupa lembar kerja peserta didik (LKPD). Kegiatan pembelajaran dalam desain LKPD ini mampu melatih keterampilan observasi, pengelompokan, penggunaan angka atau bilangan (berhitung), prediksi, eksperimen, dan keterampilan. Kata kunci: kinematika; gerak kendaraan; sumber belajar. ABSTRACTThis study discusses the phenomenon of motorized vehicle motion on the Ngawi Regency road which can be optimized as a source of high school physics learning. The purpose of this study was to examine the characteristics of dynamic quantities and the characteristics of the type of motion in the motion of vehicles on the Ngawi Regency road and their use as a physics learning resource design. The type of research used is quantitative research with survey methods. This research was conducted by measuring the speed, distance, and travel time of a motorcycle when crossing a downhill road. Furthermore, the interpretation of the data in the form of graphs is carried out. The results of the study of the characteristics of the types of motion on the motion of vehicles on the road in Ngawi Regency show that the characteristics of the types of motion on the motion of vehicles on the downhill road in Ngawi Regency are the type of accelerated linear motion (GLBB), while the characteristics of the type of motion on the motion of the vehicle on a horizontal road after crossing the track. Downhill is a type of uniformly changing straight motion (GLBB) that is slowed down. The results of the kinematics study are used as the main data for the design of learning resources in the form of student worksheets (LKPD). The learning activities in the LKPD design can train observation, grouping, use of numbers (counting), prediction, experimentation, and communication skills. Keywords: kinematics; vehicle movement; learning resources.
PENGARUH MODEL COLLABORATIVE CREATIVITY BERBANTUAN PHET SIMULATION TERHADAP HASIL BELAJAR FISIKA SISWA
Authors: Tristanti Desi Dwi Tungga , Supriadi Bambang , Prastowo Sri Handono Budi
Published: November 2022

ABSTRAKPenelitian ini bertujuan untuk mengkaji pengaruh model pembelajaran Collaborative Creativity berbantuan PhET Simulation terhadap hasil belajar siswa pada pokok bahasan momentum dan impuls. Penelitian ini dilakukan di salah satu SMA di Jember pada semester genap tahun ajaran 2021/2022. Jenis penelitian ini adalah penelitian eksperimen dengan desain penelitian pretest-posttest control group design. Subjek dalam penelitian ini yaitu siswa kelas X MIPA dengan sampel 2 kelas diantaranya sebagai kelas eksperimen dan kelas kontrol. Pengumpulan data diperoleh dari nilai pretest dan nilai posttest. Penelitian ini menghasilkan data rata-rata hasil belajar siswa pada kelas eksperimen lebih besar dari kelas kontrol yaitu 50,25 dan 37,42. Data tersebut kemudian dianalisis dengan menggunakan uji T-Test untuk mengetahui ada tidaknya pengaruh model pembelajaran Collaborative Creativity berbantuan PhET Simulation terhadap hasil belajar fisika siswa. Berdasarkan hasil analisis, diperoleh nilai signifikansi sebesar 0,004 < 0,05, sehingga dapat disimpulkan bahwa pembelajaran dengan menerapkan model pembelajaran Collaborative Creativity berbantuan PhET Simulation berpengaruh terhadap hasil belajar siswa pada pokok bahasan momentum dan impuls. Kata kunci: model pembelajaran collaborative creativity; PhET simulation; hasil belajar siswa. ABSTRACTThis study aims to examine the effect of the PhET Simulation-assisted Collaborative Creativity learning model on student learning outcomes on the subject of momentum and impulse. This research was conducted at Ambulu Public High School in the even semester of the 2021/2022 academic year. This type of research is an experimental research with a pretest-posttest control group design. The subjects in this study were students of class X MIPA with a sample of 2 classes including the experimental class and the control class. Data collection was obtained from the pretest and posttest scores. This study resulted in the average data of student learning outcomes in the experimental class which was greater than the control class, namely 50.25 and 37.42. The data was then analyzed using the T-Test test to determine whether there was an effect of the PhET Simulation-assisted Collaborative Creativity learning model on students' physics learning outcomes. Based on the results of the analysis, obtained a significance value of 0.004 <0.05, so it can be concluded that learning by applying the Collaborative Creativity learning model assisted by PhET Simulation has an effect on student learning outcomes on the subject of momentum and impulse. Keywords: collaborative creativity learning model; PhET simulation; learning outcomes.
On the ecosystem approach to the development of the Arctic in connection with the latest investment regulation
Authors: Permilovskiy Mikhail S.
Published: November 2022

The article analyzes the issues of investment development of the Arctic territories in relation to the applied content of the ecosystem approach in law. The ecosystem approach is a multidimensional means of influencing public relations related to the environment. Being an interdisciplinary doctrinal concept, with the development of environmental culture, the ecosystem approach acquired legal significance and began to be used in legal regulation. The article analyzes scientific approaches to the application of the ecosystem approach in Arctic Law.
Judicial and non-judicial protection of civil, family and labor rights in the conditions of globalization and digitalization of the state and society
Authors: Mikhailova Ekaterina V.
Published: November 2022

The article considers the protection of the rights and legitimate interests of individuals and legal entities as one of the global priorities in the field of sustainable development and, accordingly, as a fundamental category of legal science. The authors, examining the procedural and substantive components of the mechanism for the protection of civil, labor, and family rights, highlight the features of its current state: a complex system of labor rights protection, which is seen to a greater extent as non-judicial (procedural); the complex nature of measures to protect the rights of participants in family relations, primarily the least protected category - the child; the impact of digital transformation and the transition to a “contactless” method of judicial and non-judicial protection, including in an environment of forced isolation caused by the pandemic. It is emphasized that the use of digital (online) dispute resolution mechanisms should ensure a fair trial and cannot hinder access to justice.
Inclusion of evidence in a criminal case as a form of implementation of the state-governmental powers of the preliminary investigation and court bodies
Authors: Rossinskiy Sergey B.
Published: November 2022

The article examines the essence of inclusion of evidence in a criminal case as one of quite common law enforcement practice of the bodies of preliminary investigation and court.
Methodologically, starting from a differentiated approach to criminal procedural algorithms for accumulation of evidentiary material, the author associates the meaning of inclusion of evidence with the need for legalization of objects and documents received by a preliminary investigation body or a court as ready-made information productes. 
In this regard, the article concludes that it is impossible to understand the category of “inclusion of evidence in a criminal case” as a purely technical device, that is, there is a need for its interpretation as one of the forms of exercising discretionary powers of authorised participants in criminal proceedings predetermining the endowment of relevant objects with the legal force and the ability to be used to justify convictions or other law enforcement acts.
Aktivitas Antikoagulan dari Tumbuhan Kayu Ular (Strychnos lucida R.Br.)
Authors: Gunawan Elsye , Toruan Aris A.L. , Rusnaeni Rusnaeni , Appa Felycitae E.
Published: November 2022

The stem of the snakewood plant (Strychnos lucida) has been used empirically as a malaria drug, relieves fever, treats stomach pain, hemorrhoids, rheumatism, stroke symptoms, and improves blood circulation. Tannins as one of the secondary metabolites of snakewood stems contain gallic acid compounds which are known to thin the blood. The purpose of this study was to determine the anticoagulant activity of the ethanolic extract of snakewood stems on blood group samples, namely A, B, AB, and O. The method used for extraction was maceration, for testing anticoagulants used method modified Lee-White and blood smears, as well as for data analysis carried out descriptively. The results obtained by the Lee-White modification method on blood group samples were visually not clotting. For anticoagulant activity by blood smear method, it was shown that microscopically snakewood bark extract prevented the presence of blood clots which could be observed with unrelated blood cells, intact and separated from each other.Key words: S. lucida; Lee-White modification; blood smear; anticoagulants
Karakterisasi Resistensi dan Dekolorisasi Berbagai Pewarna Oleh Bakteri Indigen Indonesia Escherichia coli Strain CN5
Authors: Irawati Wahyu , Timotius Vania A.C. , Adhiwijaya Ruben P. , Marvella Eunike B.
Published: November 2022

The development of the textile industry in Indonesia is increasing the amount of dye waste produced. Copper is often a component of dyes, both of which harm aquatic ecosystems because they cannot be degraded. These problems can be overcome by bioremediation using bacteria isolated from polluted waters, called indigenous bacteria. It is hoped that indigenous bacteria can degrade textile waste and reduce copper toxicity in waters. This study aims to characterize, test resistance, and test the decolorization of the Indonesian indigenous bacterial isolate CN5 to dye and copper. There are 12 kinds of dyes used, namely: methylene blue, malachite green, congo red, mordant orange, reactive black, direct yellow, basic fuchsin, reactive orange, disperse orange, remasol red, wantex yellow, and wantex red. Resistance and decolorization tests on solid medium were carried out by growing bacterial cultures into luria bertani agar medium, each of which added a different type of dye. The dye concentrations tested were 100 ppm and 500 ppm. The ability to decolorize is known from the presence of a clear zone around the bacterial colony. The percentage of decolorization was tested using a spectrophotometer at a wavelength of 300-900 nanometers. Bacterial identification was carried out by 16S-rRNA sequencing. The results showed that CN5 isolates had a base similarity of 100% with Escherichia coli, so hereinafter referred to as E. coli strain CN5 could grow at 200 ppm and 500 ppm methylene blue, malachite green, congo red, mordant orange, reactive black, direct yellow, reactive orange, disperse orange, red remasol, yellow wantex, and red wantex but did not grow on fuchsin basic dye. Colonies of E. coli strain CN5 were only able to decolorize methylene blue with a concentration of 200 ppm and 500 ppm seen from the clear zone formed around the colony. The decolorization of methylene blue that occurred was 92.47%. The addition of copper reduced the decolorization ability to 75.59%. Based on the results of this study, it can be concluded that the E. coli strain CN5 has the potential to be used as a bioremediation agent for textile waste containing copper and methylene blue.Key words: dye; E. coli; copper; decolorization; resistant
Pertumbuhan Tanaman Tebu Hasil Mutasi Pada Ketinggian Lokasi Berbeda
Authors: Jalil Abdul , Hartatik Sri , Avivi Sholeh
Published: November 2022

The availability of superior sugarcane varieties is one of the causes of the low national sugarcane production. The results of mutations from Bululawang sugarcane (BL) variety obtained three genotypes that have the potential to have high yields. Sugarcane plants can be cultivated in all locations because sugarcane can be grown in tropical and subtropical areas with the main problem of water availability being either shortage (drought) or excess (poor drainage). Increases and differences in sugarcane yields can be caused by fertilization, good water distribution throughout the sugarcane growth cycle, crop management, climate and different varieties. if the plant does not experience a lack of water, its production can reach 123 ton/ha/year, but if the plant is under moderate stress (4-5 weeks without rain) then the production will drop to 108 Ton/ha/year. Therefore, it is necessary to conduct a study to determine the potential of each mutant sugarcane at different locations. This research uses direct observation method to each location. Then the data obtained was analyzed descriptively analytically to provide an overview of the object under study through the data that has been collected as it is without analyzing and making conclusions that apply to the public. The results of the research that the M1 mutant sugarcane had the age of emergence of tillers, the highest number of tillers and was able to adapt very well at an altitude of Â± 512 meters above sea level. The M1 mutant sugarcane has the highest plant height, the highest number of segments and is able to adapt very well at an altitude of Â±62 meters above sea level. The M2 mutant sugarcane has the highest internode length and is able to adapt very well at an altitude of Â±62 meters above sea level. Sugarcane M3 has the stem diameter, the highest internode length and is able to adapt very well to an altitude of Â± 512 m asl.Key words: sugarcane; production; mutation; different varieties
Rancang Bangun Sistem Refill Fuel Electric Portable Alat Berat
Authors: Pitriadi Peri
Published: November 2022

Proses pengisian bahan bakar pada unit alat berat pada umumnya masih menggunakan cara manual. Akan tetapi, masalah yang timbul pada pengisian bahan bakar secara manual adalah terjadinya kecelakaan kerja, tumpahan bahan bakar ke unit, dan terjadinya kontaminasi berupa debu yang masuk ke bahan bakar yang dapat menyebabkan engine bermasalah. Selain itu efisiensi dan efektivitas pada metode pengisian bahan bakar secara manual tidak dapat dikatakan maksimal. Pembuatan Portable Fuel Refiller ini kemudian bertujuan untuk mengembangkan alat yang sudah ada sebelumnya tetapi dari segi mobilitas kurang karena terpasang pada Excavator 313D sehingga unit Alat Berat yang lain tidak bisa menggunakan alat tersebut. Untuk mencapai tujuan penelitian, maka metode yang dilakukan adalah pengumpulan informasi melalui studi literatur dan melakukan observasi secara langsung ke unit Alat berat Â untuk menentukan desain refill fuel electric portable. Portable Fuel Refiller yang telah dirancang dan dibuat dapat meminimalisir masalah yang timbul dari segi keamanan dan kontaminan.Â  Selain itu, pengisian bahan bakar dengan menggunakan alat tersebut tidak membutuhkan tenaga dan waktu yang banyak sehingga pengisian bahan bakar menjadi efektif dan lebih efisien dengan waktu lebih cepat yaitu dapat digunakan dalam pengisian bahan bakar unit alat berat dengan rata-rata waktu pengisian untuk 20 liter adalah 99,3 detik untuk kecepatan aliran bahan bakar 0,2 liter/detik.
Measurement of the serum level of Elabela for the early detection of acute kidney injury in hospitalized Iraqi COVID-19 patients
Authors: Gadhi Maha hassan , S. Saleh Eman
Published: November 2022

Background: Severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is caused coronavirus disease2019 (COVID-19) affecting people worldwide. The angiotensin converting enzyme2 (ACE2) represents areceptor of SARS-CoV-2 on the infected host cell. Apelin or its receptor agonists suppress the production ofangiotensin-converting enzyme (ACE) and angiotensin II (Ang-II) and is characterized by a protective effectagainst SARS-CoV-2.Objective: The study aims to assess the serum level of Elabela biomarker as an early detector for AcuteKidney Injury (AKI) in patients with COVID-19.Cases and Methods: This is a case-control study which included 45 hospitalized adult patients in multiplecenters (public hospitals) receiving COVID-19 cases in Baghdad. These cases had a positive real-time orreverse transcription polymerase chain reaction (RT-PCR) of nasal/oropharyngeal swabs. Excluded from thestudy were those with a negative PCR and comorbidities and 43 apparently healthy adult subjects as controls.The age range of the cases and controls was (20 to 60) yearsResult: There are no a statistically significant differences between the two groups in terms of age and genderdistribution. Statistically significant differences were found in terms of eGFR, S. Creatinine, D. dimer,NEU×103/µL, LYM×103/µL and ELA biomarker. Significant negative correlations were found betweenElabela with D. dimer and NEU×103/µL, and between eGFR with S. creatinine, D. Dimer, and NUT×103/µL.Conclusion: The Elabela biomarker can be used for the early detection of acute kidney injury in COVID-19patients.
The Role of Acute Phase Reactants (Fibrinogen, Ferritin, Albumin, Calcium) in Pregnant Women with Preterm Delivery
Authors: Wajdi Ibrahim Wasan , Talib Mosa Maha
Published: November 2022

Background: Preterm labor and related prematurity are predisposing factors that increase perinatal morbidity and mortality. Acute phase reactants are inflammatory markers which are positive and negative reactants explained by the reaction of reactants to the subclinical infection that are commonly associated with preterm labor.
Objectives: To assess the role of acute phase reactants in pregnant women with preterm delivery.
Patients and method: A case control study conducted in Gynecological Department of Baghdad Teaching Hospital from 1st February 2021 to 30th October 2021, on one hundred pregnant women with gestational age (28weeks - 36weeks+6days) who attended outpatient clinic; fifty pregnant women with established preterm labor as case group and fifty pregnant women with no signs and symptoms of preterm labor as control group. Data was collected using structured questionnaire included demographic features, and biochemical parameters (serum ferritin (ng/ml), albumin (gm/dl), fibrinogen (mg/dl), and calcium (mg/dl) .
Results: Mean±SD serum ferritin in control group was (46.2 ± 16.2 ng/ml) while in case group (52.47 ± 11.6ng/ml) with significant difference between both groups (P=0.03), mean±SD serum albumin in control group (3.18 ± 0.31 ng/ml) while in case group (2.92 ± 0.39) with highly significant difference between both groups (P<0.001). Validity test of serum ferritin at cutoff   ≥ 52.7 (ng/ml) in case group was as follows: Sensitivity (94%), specificity (90%), negative predictive value (94%), positive predictive value (90%) and the accuracy was (92%). The validity test of serum albumin at cutoff ≤ 3.06 (gm/dl) to detect the preterm labor as follows: Sensitivity (78%), specificity (86%), negative predictive value (78%), positive predictive value (83%) and the accuracy was (84%). Mean±SD serum fibrinogen in control group was (400.9 ± 38.1) while in case group was (410.7 ± 51.2) with no significant difference between both groups (P=0.1). Mean±SD serum calcium in control group was (8.1 ± 0.7) while in case group was (7.92 ± 0.5) with no significant difference between both groups (P=0.1).
Conclusion: serum ferritin and albumin can be used in prediction of preterm labor in 3rd trimester.
Effect of Hydraulic Conductivity on Three Dimensional Contaminant Transport in Riverbank Filtration System
Authors: Mustafa Shaymaa , Darwish Mohamad
Published: November 2022

Riverbank filtration system is a technique used for surface water treatment that is based on biological activities to attenuate the contamination in water through its movement from the river to the adjacent pumping well. Hydraulic conductivity is a critical parameter that affects the efficiency of riverbank filtration systems. In this study, an analytical model, using Green’s function approach, is developed to investigate the effect of hydraulic conductivity on contaminant transport and RBF system efficiency. The model is applied at the RBF site in Malaysia. The outcomes show that increasing the hydraulic conductivity values results in lowering the quality of the pumped water produced from the well, in which the contamination area around the well increase. Additionally, the distance from well to the river that should be considered when establishing a new RBF site is significantly affected by the hydraulic conductivity value.
Development, Current Status and Challenges of Multiple Use Water Systems in Nepal: A Review
Authors: Raut Nani , Gurung Smriti , Khalid Abda , Dahal Bed Mani , Kafle Kumud Raj , Prakash Anjal
Published: November 2022

Drinking water supply systems in Nepal, originally designed to meet domestic water needs, are currently being used to fulfill the multiple water needs beyond domestic use which created inefficiency, risking water shortage and even causing premature system failure and breakdown. International Development Enterprises (IDE) first implemented the scheme, which is referred, to as Multiple-Use Water Systems (MUWS) that addresses the productive as well as domestic water needs. The MUWS systems are implemented in middle hill districts of the western, mid-western and far-western development regions of Nepal. The onset point for MUWS is classified as domestic-plus in which users have access to water for productive uses but maintain the priority for domestic uses around homesteads; irrigation-plus in which, users can accommodate water for both productive and domestic uses but maintain the priority for irrigation uses; and community-driven in which communities and their existing water practices and priorities as a starting point for improvement, and offers technology choices designed for multiple uses. MUWS shows multiple benefits by ensuring water availability, enhanced economy and community involvement. However, the system faced challenges of water shortage during the lean period and unaffordable system connection fees and tariffs for the poor and marginalised. Properly planned, managed and regulated MUWS can be seen as one of the several potential adaptation options utilising scarce water for high-value and off-season crop production, more effectively and efficiently in the context of changing climate.
Monitoring of Pesticide Residues in Lebanese Vegetables and Agricultural Soils and Their Impact on Soil Microbiological Properties
Authors: Omeiri Mohamad H. , Khnayzer Rony S. , Yusef Hoda H.
Published: November 2022

The practice of pesticide application in agriculture done in Lebanon deviate from standard agricultural disciplines, raising awareness of their contamination of soil and vegetables as well as their repercussions on microbial communities. To this end, soil and vegetable samples from different pesticide-treated sites were quantified for chlorpyrifos (C) and methomyl (M) residues using Gas Chromatography-Mass Spectrometry. Moreover, clear soil specimens were treated with different concentrations of C, M, and CM assortment to assess their repercussion on the microbial population. High pesticide concentrations were recovered ranging between 31.13 and 53.74 mg/kg in eight agricultural fields, which abate gradually with time. After 20 days of pesticide implementation, their residues were above the maximum residual levels for lettuce, cabbage, tomato, and corn. Soil altered with pesticides showed fluctuation in its microbial community by suppressing some groups while favouring the propagation of tolerant species. Our data indicate the need for the requirement of strict laws to minimise pesticide usage and reduce their impact on soil quality, human health, and non-target organisms.
Optimization of Two-Stage Operational Amplifier Using Firefly Algorithm Considering Environmental Constraints
Authors: Archana Kumari , Kumar Ram , Nath Sourav , Srivastava Prabhat Kumar
Published: November 2022

Nature inspired algorithms are simple, efficient, and well-organized evolutionary computational techniques to optimize the design process of Analog electronic circuits. Due to the presence of several competitive design objectives, analog circuit sizing is inadequate without the analysis of trade-offs between the performance specifications. Therefore proposed work adopted firefly optimization, to optimize the design of the Operational Amplifier by optimising the various design specifications like Gain, Slew Rate, etc., involved in the design to achieve the comprehensive goal of minimum transistor required in the design. The designed two-stage operational amplifier is implemented in UMC 0.18 μm CMOS technology using CADENCE software. Experiments were carried out taking into consideration the design constraints, for different ranges of design variables and were also verified by comparing with simulated results from CADENCE. Based on these results, it can be said that firefly algorithms can match up to theoretical and simulated results, with the firefly algorithm being able to achieve better results in terms of better optimum values of design specification such as Gain, Slew Rate, etc.