bluuebunny/crossref_metadata_2025 huggingface dataset:
Creating Shared Value in Upstream Oil and Gas Company and Community: A Case Study of CSR Implementation in PT Pertamina EP Tarakan Field
Authors: Kurniawan Isrianto , Arief Neneng Nurlaela
Published: August 2023

This research examines the practice of Creating Shared Value (CSV) through CSR implementation in upstream oil and gas companies and how it relates to sustainability. In 2020, there was a notable natural decline in energy resources, resulting from the Tarakan Field production performance. This situation presented numerous economic and social challenges, including the responsibility to support the holding company’s commitment to managing energy resilience and contributing to SDGs. The research, which incorporates information from literature analysis, in-depth interviews, and company reports, demonstrates that Tarakan Field’s CSR implementations were a useful strategy for generating shared value for businesses, stakeholders, and communities in alignment with sustainability goals. The research argues for the relationship between CSR implementation and sustainability, as well as the implementation plan and CSV measurement through CSR implementation in Tarakan Field. These concerns are particularly evident in the vague CSV measurement, which rendered it inefficient for the company to fulfill its commitment through unintegrated CSR and operational activities, despite the company’s strategy.
Impact of Parental Aggression on Primary School Teachers’ Everyday School Life and Well-being
Authors: Sklirou Sotiria , Papakonstantinou Antigoni-Alba
Published: August 2023

According to international research, parental aggression is observed in school premises, and it usually has a negative impact on schools’ climate and on actors’ social interactions. Parental aggression in school premises is a phenomenon not sufficiently studied in Greece.  The aim of the present study was to fill the bibliography gap and to examine the impact of parental aggression on teachers’ everyday school life and well-being. Thus, a quantitative study was conducted, and an explanatory correlational design was used for the collection and analysis of the research data. Our target population was primary school teachers. 156 primary school teachers in Attica participated in our research by filling in an original questionnaire of closed-ended questions. According to the findings of the research, parental aggression is clearly observed in school premises. Parental aggression affects students, it influences the emotional state of teachers and has a negative impact on their everyday school life and well-being. Although aggression can be harmful to all teachers, specific individual characteristics of teachers (such as gender, age, working experience) can magnify certain impacts of aggression.
Pengembangan Multimedia berbasis Inkuiri Terbimbing pada mata pelajaran Ilmu Pengetahuan Alam Kelas VII SMP Negeri 2 Kota Pariaman
Authors: Mesra Elia , Darmansyah Darmansyah , Hendri Nofri
Published: August 2023

This study aims to produce a guided inquiry-based learning multimedia that is valid, practical, and effective so that it is suitable for use by teachers and students in the learning process.This research belongs to the research and development cluster using the 4D model, namely define, design, develop, and disseminate. The define stage consists of curriculum analysis, student analysis, media analysis and analysis of subject objectives. The Design phase is carried out by designing learning media. The development stage is carried out through validity testing by validators and practicality tests, effectiveness by class VII students at SMP N 2 Kota Pariaman and the last is dissemination or dissemination in the form of media that will be distributed to schools at SMP Negeri 2 Kota Pariaman. Based on the research that has been done at SMP N 2 Kota Pariaman, it has been successfully made learning multimedia. The results of the validity test of the material and media aspects show that the resulting media is very valid, namely, with a score of 148 with an average material validity value of 93.54% and a score of 131 with an average media validity of 87.91%. Meanwhile, students' responses to the products developed were very practical with an average of 94.67% and to measure the level of achievement of student learning outcomes before and after using the media showed tcount > ttable so that the effectiveness trial showed an increase in learning process skills. It can be concluded that the multimedia developed in this study is suitable for use in the learning process.
Motivasi Belajar IPA Siswa Melalui Penerapan Model Pendekatan Konflik Kognitif di Kelas VIIIB SMP Negeri 8 Kunto Darussalam
Authors: Yustini Yustini
Published: August 2023

This study aims to determine the increase in learning motivation of class VIIIB students of SMP N 8 Kunto Darussalam on the subject matter of pressure by using a cognitive conflict approach model. The subjects studied were students of class VIIIB, totaling 20 people. The research instrument is a learning device and a data collection instrument in the form of motivational questionnaires before and after learning. In analyzing the data, descriptive analysis techniques and inferential analysis were used. From the results of the descriptive analysis, it was found that students' learning motivation for the interest category increased by 13.2%, the relevance category increased by 6.5%, the expectation category increased by 4.2%, and for the outcome category it increased by 3.8%. From the results of inferential analysis using the sigt test, the P value <0.05, i.e. 0.000114 <0.05, which means the research hypothesis is accepted, namely there is a significant difference in science learning motivation in class VIIIB SMP Negeri 8 Kunto Darussalam on the subject of pressure through the application of the cognitive conflict approach model at the level of confidence 95%.
Pengembangan Multimedia Interaktif Mata Pelajaran Informatika Pada Kurikulum Sekolah Penggerak Untuk Siswa Kelas X SMA
Authors: Yusuf Ahmad , Syafril Syafril , Zuwirna Zuwirna , Hidayati Abna
Published: August 2023

Learning informatics sub-material algorithms and programming in the driving school curriculum has a change from visual programming to textual language in class IX, and in programming learning in class X students will learn the concepts of coding and procedural programming. In learning infomatics is still monotonous because the explanation of the material still uses e-books and books that have been provided by the government about Algorithms and Programming. Therefore, the author is interested in designing interactive multimedia, so that students better understand the learning material that is packaged interactively.This type of research is research and development or what is known as Research and Development (R&D). Based on the results of the material assessment from teachers of informatics subjects of SMA N 2 Padang and media experts lecturers of the Department of Curriculum and Educational Technology of UNP, there is a procurement of validation with the suitability of the material calculated from the average validator of 4.79 with the criteria of "very valid". There are two validators with the criteria of "very appropriate" with the value obtained from validator I of 4.62 and validator II of 4.87. For practicality analysis, it was taken through a questionnaire of responses from class X SMA N 2 Padang students related to the use of multimedia which was calculated to reach an average score of 4.62, so that the results of the practice could be known with the criteria of "very practical".
Rancangan Pembelajaran Individual Pada Mata Pelajaran IPA Secara Daring Menggunakan Aplikasi Google Classroom Di Sekolah Dasar
Authors: Anisya  , Devitri Madella
Published: August 2023

In the days of recruits many students perform individual studies at home to reduce the impact of covid-19 and one of them affects elementary school children who require them to study individually in their own homes with parents accompanying them to understand the learning given by teachers Work in their homes and then put together the following week, teachers who are doing the learning process through the whatsapp application accompanied by student parents during an online class, and some schools have been using e-learning as learning stations during sessions. Much of the complaints experienced during online study are particularly with science subjects which in this science class there is some material that students should do: the practice of applying the material that is being studied with the pandemic covid-19 makes ita little difficult for students or elementary school students to understand what would be done Growth and development such as the example of green beans to toge and so on. An individual learning design in a classroom where students transition from learning to teaching together in a single room to a room where this individual design is focused more effectively on the individual, giving more downloadable materials and video links that are watched for materials that require performing practices such as growth and development materials in green beans Into toge and other practice materials The challenge of applying such vast scientific pupil individualized study, the vast storage of mobile phones to keep Google classroom and video practice and so on.
Review Sistematis : Tantangan Pembelajaran E-learning Selama Pandemi Covid-19 pada Mata Pelajaran IPA Kelas VII di SMP
Authors: Bustanuddin  , Aziza Bustanil Dimas
Published: August 2023

Learning during the Covid-19 pandemic is recommended to be carried out online, in order to reduce the impact of the spread of the SARS-CoV-2 virus. One of the supporting elements that can facilitate online learning is E-learning. The change in learning methods that were originally carried out face-to-face to online learning experienced several challenges in terms of the availability of qualified technology such as electronic devices in the learning process, internet networks, and the readiness of students and teachers to face online learning. In terms of students, the challenges they face start from an unstable internet network, inadequate internet quota and the unavailability of gadgets for learning, resulting in a lack of students' understanding of the subject matter provided.
Upaya Menumbuhkan Stimulus Respon Peserta Didik Melalui Penerapan Teori Belajar Behavioristik
Authors: Almizri Wahyu , S Neviyarni
Published: August 2023

Abstract:  The purpose of this study is to describe the applications and benefits used by teachers in stimulating student stimulus responses through behavioristic theory. This research method using literature study. The data collection tool used is through searching scientific journals that I took from several electronic media. The data analysis technique used in this study is annotated bibliography analysis. This research boils down to the conclusion that the teacher in applying behavioristic theory to stimulate student response stimulus is that the teacher must understand the differences in student learning styles and their respective characteristics, the readiness of students to learn must also be considered by the teacher, and the teacher provides good modeling/imitation to students.

 

Keywords: behavioristic theory, learning style
Pengaruh Pengelolaan Kelas di Sekolah
Authors: Nasution Salsabila , S Neviyarni
Published: August 2023

Classroom management is a teacher's skill in order to create a pleasant learning atmosphere, and can control it if there are disturbances during learning. The aim of this research is to find out how much influence the classroom management has on students by the teacher. This research also aims to compare the effects of classroom management that have the greatest impact on students. The method in this research is a literature study by collecting library data from several sources of scientific research in accordance with classroom management from 2017-2022. The results of a literature study conducted by researchers related to the effect of classroom management on students at school can be concluded that classroom management is very influential for several aspects of student learning including student learning motivation, student achievement, student learning outcomes, student understanding, student activity, and attitudes student. Among the several aspects that are affected by classroom management, learning achievement is very dominant and has been found and carried out by many people.

Keywords: Influence, Classroom management, Teachers, students
Peningkatan Kemampuan Menyimak Pembelajaran Peserta Didik Melalui Media Poadcast Pada Mata Pelajaran Bahasa Indonesia
Authors: Yanti Vitri , Rahmi
Published: August 2023

This study aims to determine the role of podcast learning media in Indonesian language learning which focuses on listening to students on the subject of poetry.The research model used is the ADDIIE model which has five stages of development, namely the development stage, implementation stage, and evaluation stage. In this study, it was taken from an observation questionnaire conducted on a number of junior high school students. The Poadcast learning media or audio-radio-based learning media at this time can be accessed on several social media platforms such as Spotify, Joox, and others that can be accessed anytime. Any where by students. Nowadays, the average junior high school student already has an android, so it would be great if a teacher could learn by using podcasts as a media to support learning. The results showed that the use of podcasts or based Audio visuals are very helpful in improving students' listening skills because in terms of learning media, podcasts are very attractive to students compared to listening to directions from teachers manually in front of the class.
Model Pembelajaran Sosial Pada Pembelajaran PAI Online Learning Dimasa Pandemi Di SMA
Authors: Delvytra Indry , Yulia Sari Riska
Published: August 2023

This study aims to examine how the implementation of the social learning model, namely Jurisprudence, in PAI subjects in high school. With the learning situation conducted online, a strategy is needed by the teacher in choosing the method in the learning activities to be carried out. The jurisprudential model emphasizes the relationship between individuals and society or other people. The research method used is descriptive qualitative. By using this descriptive method, researchers collect data through literature studies such as journals, articles and other scientific works. In descriptive qualitative research, the basis for analysis is the dynamic interplay of the issues raised, theories, experiences, conversations, and reflections. From this research, the syntax of the social learning model in schools will be found.
Pengembangan Multimedia Pembelajaran Interaktif Menggunakan Aplikasi Articulate Storyline
Authors: Syahrul Muhammad , Yeni J Fetri
Published: August 2023

The purpose of this study id to find out how to develop interactive learning multimedia using the articulate storyline application, to find out the validity and practicality of interactive learning multimedia in class VIII at indonesian subject at MTsN 6 Padang. The results of the material validity test are in the "Very Valid" category with a percentage of 88,42%, the media validation results are in the "Very Valid" category with a percentage of 95% so that flipbook-based learning media products can be tested. Furthermore, the results of the product practicality test are in the "Very Practical" category with a percentage of 87%, so that interactive learning media products are suitable for use by VIII grade islamic high school students as learning media.
PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF MENGGUNAKAN ARTICULATE STORYLINE MATA PELAJARAN IPA KELAS VIII SMP
Authors: Kristi Anggel , Zuliarni Zuliarni
Published: August 2023

The development of interactive learning media using Articulate Storylinejis carried out asjan effortjtojhelp teachers in thejlearning process become better, because when learning uses the lecture method, thejusejof power point learningjmediajis only dominated by writing andjthe usejof learning media. teachingjmaterialsjin thejformjof worksheets and textbooks. With interactive learning media using an articulate storyline, it can help teachers in the learning process, so that learning is more interesting for students to follow. Thisjstudyjaims tojproduce ajvalid and practical Articulate Storyline learning media on optical instruments. This type of research is development research or what is known as Research and Developmentj (R&D). jThisjstudy uses the development modeljproposedjby Brag and Gall which is simplified into 5 steps, namely planning, initial product development, product validation, limited trial, and final product. The product developed was assessed by 2 material validators, namely a science subject teacher at SMP N 25 Padang and 2 media validators, namely a lecturer in the curriculum and educational technology department. The assessment ofjthe practicality test was carriedjoutjby 15 grade VIII students of SMP N 25 Padang.

Thejproductjvalidity testjresultsjforjthe materialjaspectjare categorized as "very valid" by obtaining an average of 4.2 from the material validator I and obtaining an average of 4.7 from the material validator II. Thejresultsjofjthe validity assessment for thejmedia aspect are categorizedjas "very valid" by obtaining anjaverage of 4.4 from the media validator I and obtaining an average of 4.54 from the media validator II. Thejresultsjofjthe practicality test conducted by 15 grade VIII students at SMPjN 25 Padang werejcategorizedjas "very practical" withjanjaveragejscore of 4.6. learning and asjajlearning resourcejforjstudents.
PENGARUH PENERAPAN METODE PEMBELAJARAN ROLE PLAYING TERHADAP HASIL BELAJAR BAHASA INDONESIA KELAS VIII SMP
Authors: Ayunda Widya , Syafril Syafril
Published: August 2023

Tujuan penelitian ini untuk mengetahui Pengaruh Penerapan Metode Pembelajaran Role Playing terhadap Hasil Belajar Siswa pada Mata Pelajaran Bahasa Indonesia di Kelas VIII SMP Perti Padang. Jenis penelitian ini adalah kuantitatif. Populasi adalah siswa Kelas VIII SMP Perti Padang. Sampel diambil sebanyak 2 kelas terdiri dari siswa kelas VIII2 dan VIII3 SMP Perti Padang yang berjumlah 40 orang. Teknik pengumpulan data berupa tes dalam bentuk soal pilihan Ganda untuk melihat perbedaan kelas kontrol dan kelas eksperimen. Hasil penelitian menunjukan bahwa nilai hasil belajar siswa kelas eksperimen yang menerapkan metode Role Playing nilai tertinggi yang berhasil dicapai siswa adalah 85 dan nilai terendahnya adalah 65 dengan rata-rata 76,65 dengan SD 4,98. Nilai hasil belajar siswa kelas kontrol yang menerapkan model konvensional, nilai tertinggi yang berhasil dicapai siswa adalah 80 dan nilai terendahnya adalah 65. Nilai rata-rata 71,55 dengan SD 4,66. Terdapat perbedaan yang signifikan antara hasil belajar kelas ekperimen yang belajar dengan model pembelajaran Role Playing pada kelas VIII2 dibandingkan kelas kontrol yang belajar menggunakan model konvensional pada kelas VIII3 SMP Perti Padang. Dengan demikian dapat disimpulkan bahwa Metode Pembelajaran Role Playing berpengaruh secara signifikan terhadap Hasil Belajar Siswa pada Mata Pelajaran Bahasa Indonesia di Kelas VIII SMP Perti Padang.
PENERAPAN MEDIA GAMBAR UNTUK MENINGKATKAN HASIL BELAJAR IPA SISWA KELAS IX SMP NEGERI 8 KUNTO DARUSSALAM
Authors: Yustini Yustini
Published: August 2023

Penelitian ini bertujuan untuk mengetahui perolehan hasil belajar IPA dengan menggunakan media gambar pada siswa kelas IX SMP Negeri 8 Kunto Darussalam.  Subjek penelitian ini adalah siswa kelas IX SMP Negeri 8 Kunto Darussalam yang berjumlah 26 siswa yang terdiri dari 12 orang laki – laki dan 14 orang perempuan.  Parameter yang diukur adalah hasil belajar siswa berupa daya serap dan ketuntasan belajar yang diperoleh dari kuis tiap pertemuan dan ujian blok pada setiap kompetensi dasar.  Data dianalisis secara deskriptif.Peningkatan hasil belajar siswa dapat dilihat dari daya serap dan ketuntasan belajar siswa sebelum dan sesudah dilaksanakan PTK.  Sebelum PTK daya serap siswa adalah 58% dengan ketuntasan belajar 44%, sesudah PTK Siklus 1 daya serap siswa adalah 68 % dengan ketuntasan belajar 82,86% dan pada Siklus 2 daya serap siswa adalah 78 % dengan ketuntasan belajar 100 %. Sedangkan kinerja ilmiah siswa pada siklus I (72,8 %)  dan siklus II (85,6%).  Hasil penelitian ini menunjukkan bahwa penggunaan media gambar dalam proses pembelajaran dapat meningkatkan hasil belajar siswa kelas IX SMP Negeri 8 Kunto Darussalam.
Opportunities And Challenges Of Majelis Zikir Dan Selawat On Becoming Indigenous Spiritual-Based Psychotherapy
Authors: Saifuddin Ahmad
Published: August 2023

Majelis zikir dan selawat (MZS) is a community with a routine in the form of recitation of zikir or selawat. In the context of Indonesian culture, MZS thrives with various variants. This study seeks to uncover the opportunities and challenges of MZS as a community that has a spiritual-indigenous therapeutic element. The research was carried out by phenomenology method. The collection of data was implemented by conducting interviews and observation. As a result, these MZS have opportunities and challenges. The opportunity is to become a means of achieving catharsis, the process of changing irrational beliefs into rational, increasing submission, fostering prejudice both to God and life, and increasing social support. This opportunity makes the MZS potentially become spiritual-indigenous psychotherapy. However, the MZS assemblies also have challenges that can threaten their functioning as psychotherapy if they are not appropriately managed. One of them is their members' comprehensive rate about the meaning of dhikr and selawat and the members' objections when they have to become the host of MZS’s.
Mental Health Impacts of Using Social Media Among University of Halabja Students (Kurdistan Region of Iraq)
Authors: Noori Razaw , Hussein Hataw Hama Saleh , Ibrahim Aweza
Published: August 2023

In the recent years, the use of social media has increased. Social media is the fastest way to reach information and make online communication. According to worldwide digital population- Internet - Statista on Jul 26, 2022, there are five billion internet users worldwide, which means 63 percent of the population in the world. This data further indicates that the male’s use of social media was higher than females. The Kurdish version of Hopkins Symptoms CheckList -25 and Perceived Stress Scale was used to assess psychological distress among university students that used social media. The questionnaire was distributed randomly among university students. Finally, 143 university students participated in the study. The prevalence of depression and anxiety was 65.03%, 62.24%, the level of stress was (M = 17.77, SD = 5.570). As a result, high levels of depression, anxiety, and stress among both females than males Halabja University students were found.  This study aimed to indicate the impacts of social media on mental health among Halabja University students. The study found out that the use of social media has been making negative impacts on students’ mental health.
Professional orientation of engineering specialties within special course in physics
Authors: Bykova Valentina Prokhorovna
Published: August 2023

The article highlights the peculiarities of teaching physics to the students of Astrakhan Technical University during a special course “Operation of marine electrical equipment and means of automatics” within the framework of technical creativity workshop “Applied physics” organized under the Department of Physics. The given special course can promote realization of a variative part of the direction, according to the curriculum. The content of the special course meets didactic principles: integration, continuity and succession of training, fundamentality and professional orientation of interdisciplinary links. It was theoretically proved that such content is most fully satisfied by the special course on physics “Bases of electromagnetism and electromagnetic compatibility elements” based on integration of physical theories with technical ones in the frame of the elective disciplines “Bases of electromagnetic compatibility” which helps to form professional orientation of knowledge and abilities on physics. There is examined a theoretical component of the special course and particular tasks and solutions are given: practical problem connected with professional activity of the future specialist; the research problem, allowing to predict the expected result and to learn how to conduct the research work; the creative problem satisfying the conditions of industrial teaching. Diagrams of a DC electric circuit, a graph of dynamic loops of remagnetization of a coil, illustrations of the block “Properties of gases”, the laboratory complex “Electricity and Magnetism”, a block of generators, a diagram and model of the Brovin Kacher device, as well as its components are given as part of the exemplary tasks for students. The experience of non-contact energy transfer is illustrated. Conclusions are drawn about the practical significance of the special course in the framework of the work of the workshop of technical creativity at the Department of Physics of Astrakhan State Technical University.
Technology of manufacturing samples from polymer composite materials
Authors: Meleshin Maksim Alekseevich , Salamekh Ali , Mamontov Victor Andreevich
Published: August 2023

The article considers the materials, composition and methods of manufacturing samples from polymer composite materials (PCM). There is presented the method of testing samples of PCM for mechanical properties. For testing, plates were made from which samples from PCM were cut, based on glass roving, glass wool and polyester resin with the addition of a hardener. Using mechanical tests, the influence of the quantitative ratio of layers of glass wool and roving fiberglass has been determined when testing samples for three-point bending, stretching and compression. A scheme of structural reinforcement of PCM plates is given, graphs of the average values of breaking loads and ultimate strengths when testing samples for three-point bending, dependences of average values of breaking loads and ultimate strengths when testing samples for tension and compression are illustrated. Comparative analysis of the average values of the tensile strength of the samples during the compression test has been carried out. As a result of processing the data obtained during the study, it was found that with an increased number of layers of roving glass in the PCM composition increases the destructive load and tensile strength, compression, but the values of the applied load of PCM samples decrease during three-point bending tests. The experimental data obtained from the test results of PCM samples are the main indicators of the mechanical properties of PCM with various reinforcement schemes for their use in ship hull structures, in particular as a material for ship tanks.
Improving efficiency of seals of parts of cylinder piston group of marine diesel engines
Authors: Matveev Yuriy Ivanovich , Khramov Mikhail Yurievich , Kolyvanov Vladimir Viktorovich , Kuritsyn Sergey Yur'evich
Published: August 2023

During the engine operation, the piston rings wear out and the grooves under the piston rings are destroyed, as a result of which there is a decrease in the sealing of the combustion chamber. This problem has been usually solved by replacing the old, spent piston and rings with new ones. There is considered a method of extending the life of the cylinder piston group. The proposed method consists in changing the composition and design of the upper piston ring, which is primarily responsible for sealing the combustion chamber. It is proposed to bore the groove of the upper piston ring, until all defects obtained during the engine operation are eliminated; then, to make two piston rings fitting the size of the groove and install them into the bored groove. Installation of the rings should be done in such a way that the axial locks are positioned in line in the opposite direction. In this position of the rings, gases entering the joint of the upper ring rest against the solid body of the lower ring and the further path for them is terminated. The breakthrough of gases from the working plane into the crankcase is excluded, the indicator efficiency of the engine increases, the wear of the cylinder bushings of pistons and rings decreases, the vibration of the flutter type is eliminated. For installation, standard piston rings are used with a slight modification, which consists in adjusting the height and changing the profile of the rings in order to reduce wear of the cylinder sleeve and rings during operation. According to the test results, conclusions were drawn about the increased service life in the manufacture of the piston rings with optimal geometry and about a positive effect on the engine performance.
Optimization of operating modes of ship refrigeration plant with artificial cold accumulator
Authors: Semenov Alexander Evgenyevich , Andreev Aleksander Ivanovich
Published: August 2023

The ways of optimizing the operation of a refrigeration unit for fishing and refrigerated vessels with the additional inclusion of artificial cold storage devices are investigated. For this purpose, a new technology of cold storage has been developed on the basis of a refrigerating machine with direct contact between media and ice production. The refrigerant RC318 was taken as freon which does not form crystalline hydrates. Based on this, the optimization of the operation of a single-stage refrigeration machine was carried out using the Lagrange multiplier method for the target function of energy consumption, calculated by reducing the exergy flow in the system. The data obtained show the relevance and prospects of using cold accumulation on ships to reduce energy costs for the operation of refrigeration equipment and increase the autonomy of fishing vessels. Optimization according to the given method leads to two modes of operation of the refrigerating machine, as the most optimally beneficial in terms of operating conditions during the generation of cold. Optimization was carried out for two schemes for including a cold accumulator in the cold supply system. The proposed optimization methods make it possible to reduce the energy consumption of refrigeration units to the level of design loads, and to compensate for peak loads with the help of cold from batteries. Further research in this matter is aimed at reducing the size of the battery, increasing its energy efficiency and developing recommendations for inclusion in the general schemes of ship refrigeration plants based on mathematical optimization models and field experiments. It also plans to further improve the methods of cold accumulation based on ice generation with direct contact of media inside refrigeration units.
Wear resistance and compatibility of test materials for scoop chain hinge
Authors: Petrovskiy Valeriy Aleksandrovich , Ruban Anatoliy Rashidovich , Khomenko Tat'iana Vladimirovna , Melnikov Alexander Victorovich
Published: August 2023

The current unfavorable environmental and hydro-technical situation in some regions of the country has cre-ated a number of serious problems. The government of the Russian Federation has created projects and programs where dredging is an integral part. There are carried out dredging works, among other things, by multi-bucket dredgers, where a scoop chain is the main working body. The performance and reliability of the chain depends on the quality of materials that experience high dynamic loads, and the consequences of the abrasive environment, which leads to accelerated wear of the swivel. There are given the results of the study of wear characteristics, the range of compatibility of steels and alloys of the hinged connection of the dredger bucket chain and the technology for the restoration of these elements, with an increase in the resource of the chain connection unit. Experimental studies simulating the wear of the assembly on small-sized samples determined the wear re-sistance of the materials of the pair. The method of comparative analysis with reference pairs was used. The experimental material consisted of 13 pairs, including 2 pairs of standards made of steel 110Mn13, 38CrNi3M (sleeve-finger) and steel 110Mn13 (sleeve and finger), where the remaining pairs were made of materials: steels C35K, C45K, 110Mn13, 38CrNi3Mo, wear-resistant surfacing with E – 190Cr5Si7 – LEZ – T – 590 – NG electrodes, surfacing with wire SV08A, electrodes E50A – UONI 13/55 (E513B20H), E46 - ANO-4 (E433R24) after a complex of heat treatments, chemical-thermal treatments, surface plastic deformation, where the samples were subjected to a load of 6615 N (675 kgf) in water-abrasive medium, were tested on the friction machine. Fundamental dependences are revealed and graphs of the influence of the hardness of the samples and the carbon content of the friction surface on the wear-resistant characteristics of various structural classes are plotted. Promising pairs for full-scale tests were determined: 1. steel 110Mn13 (sleeve) - surfacing SV08A with chemical-thermal treatment (finger); 2. steel 38CrNi3Mo (sleeve) - steel C35K with chemical-thermal treatment (finger); 3. steel C35K with chemical-thermal treatment (sleeve) - cladding SV08A with chemical-thermal treatment (finger).
Building universal storm diagrams to choose optimal route for sea vessels
Authors: Nuriev Ramazan Aydynovich
Published: August 2023

The paper considers the problem of choosing the optimal route for a sea vessel and the need to build universal storm diagrams that would show the possibility of avoiding the dangers of stormy navigation and at the same time make it possible to provide proper seaworthiness in bad weather conditions. The dangers of stormy navigation that affect the seaworthiness that a ship may encounter are described. The theoretical basis for creating this kind of diagrams is presented. A universal storm diagram was built using the Excel program, which is included in the standard Microsoft Office package. The task of choosing optimal route, taking into account the characteristics of the vessel for a particular vessel and given weather conditions, was set and solved. The characteristics of the vessel are presented. The solution was found using the constructed diagram. The zones of resonances of the main types of the ship's roll, the zone of parametric resonance, the zone of broaching and also predicted speed of the ship in waves have been calculated. The safest and, at the same time, the most efficient route for the ship under the conditions of this problem was chosen. A comparison was made of the behavior of a particular ship calculated using the proposed diagram, and the behavior of the same ship in practice. It has been established that the dangerous zones shown in the diagram coincide with the dangerous zones obtained from observation directly on the ship. The simplicity and accessibility of the proposed method for choosing the optimal combinations of course and speed when sailing in stormy weather conditions is proved. It is concluded that when implementing the proposed ideas, it is possible to achieve an increase in the level of navigation safety and an increase in the efficiency of maritime cargo transportation, while varying various optimality criteria.
Hubungan antara Mental Toughness dengan Competitive Anxiety pada Atlet Futsal
Authors: Ismail Ghulam Zaky , Yulianti Silviana , Priambodo Anung
Published: August 2023

Mental toughness adalah salah satu faktor penting dalam pencapaian prestasi atlet. Memiliki mental toughness yang baik dapat membantu atlet dalam mengontrol diri ketika mengalami competitive anxiety agar dapat menampilkan performa terbaiknya. Penelitian ini bertujuan untuk mengetahui hubungan antara mental toughness dan competitive anxiety atlet Liga Futsal Kota Mojokerto 2022. Penelitian ini menggunakan metode kuantitatif korelasional. Populasi penelitian adalah atlet Liga Futsal Kota Mojokerto dengan jumlah 53 pemain. Instrumen yang digunakan adalah skala mental toughness dan competitive anxiety. Analisis data dilakukan menggunakan korelasi pearson. Hasil penelitian ini menemukan bahwa terdapat hubungan negatif yang signifikan antara mental toughness dengan competitive anxiety pada atlet Liga Futsal Kota Mojokerto 2022 (r = -.662, p < .05). Artinya, semakin tinggi mental toughness, maka semakin rendah tingkat competitive anxiety. Begitu pula sebaliknya, semakin rendah tingkat mental toughness, maka semakin tinggi tingkat competitive anxiety.
Hubungan antara Perceived Social Support dengan Loneliness pada Mahasiswa di Masa Pandemi Covid-19
Authors: Nandana I Putu Diva Adiartha , Jatnika Ratna , Rubiyanti Yanti
Published: August 2023

Pandemi Covid-19 yang telah berlangsung sejak tahun 2020 menyebabkan pemerintah menerapkan kebijakan social distancing. Social distancing ini berpengaruh terhadap perubahan sistem pembelajaran mahasiswa menjadi perkuliahan jarak jauh. Penelitian terdahulu menunjukkan adanya peningkatan loneliness pada mahasiswa selama pandemi Covid-19 berlangsung. Loneliness dapat berdampak negatif terhadap mahasiswa sehingga diperlukan suatu variabel yang berkorelasi terhadap penurunan tingkat loneliness pada mahasiswa, yaitu perceived social support. Penelitian terdahulu juga menjadi bukti yang menunjukan adanya hubungan antara perceived social support dengan loneliness. Penelitian ini bertujuan untuk mengidentifikasi hubungan antara perceived social support dengan loneliness pada mahasiswa Universitas Padjadjaran di masa pandemi Covid-19. Rancangan yang digunakan dalam penelitian ini adalah kuantitatif noneksperimental dengan jenis penelitian correlational study. Proses pengambilan data dilakukan pada bulan Oktober—November 2022 dengan jumlah sampel penelitian sebanyak 290 mahasiswa Universitas Padjadjaran angkatan 2019— 2021 yang sedang melaksanakan perkuliahan jarak jauh atau hybrid. Penelitian ini menggunakan stratified random sampling dengan cluster satu tahap sebagai teknik sampling. Hasil penelitian menunjukkan bahwa terdapat hubungan negatif yang signifikan antara perceived social support dengan tingkat loneliness pada mahasiswa Universitas Padjadjaran angkatan 2019—2021 (r = -0.597). Hal ini dikarenakan keberadaan perceived social support dapat membuat mahasiswa merasa puas dengan hubungan sosial yang dijalaninya sehingga mahasiswa tidak merasakan loneliness.
Physico-chemical and rheological properties of meat pates with corn starch suspensions prepared on electrochemically activated water
Authors: Marynin Andrii , Shpak Vladyslav , Pasichnyi Vasyl , Svyatnenko Roman , Shubina Yevgenia
Published: August 2023

Introduction. The aim of the study was to determine the influence of electrochemically activated water application on the rheological properties of corn starch suspensions and pates prepared with them. Materials and methods. Corn starch suspensions were prepared on artesian water, which was activated by electrochemical treatment on a diaphragm electrolyzer. Physico-chemical characteristics of electrochemically activated water were determined using a Palintest 7500 photometer. Morphological studies of starch granules were carried out by scanning electron microscopy, and granulometric composition was determined by laser diffraction method. The rheological indicatorss of starch suspensions and pates were studied using a Kinexus Pro+ rheometer. Results and discussion. The physico-chemical characteristics of electrochemically activated water except pH met the requirements of the European Parliament and Council Directive on the quality of water intended for human consumption. The water absorption capacity of starch when preparing its suspensions on a catholyte (obtained by passing a direct electric current through water in the cathode chamber of an electrolyzer) decreased by 26%, and when prepared on an anolyte (obtained in the process of water oxidation reactions on the anode) increased by 18%. The moisture holding capacity of hydrated starch decreased by 10% when using catholyte, and increased by 36% when using anolyte. Electrochemically activated water had a significant effect on the rheological characteristics of starch suspensions: with an increase in the percentage of complex shear strain, the shear stress increased proportionally for samples of suspensions made on electrochemically activated water. The viscoelastic properties of starch suspensions prepared using electrochemically activated water both at 25 ℃ and at 68 ℃ tended towards an ideally elastic gel, that is, they had more elastic structure than the control samples. Under the action of shear deformation, the elastic properties were lost, while the suspensions acquired viscosity (phase angle values increased). The maximum value of the moisture binding capacity of pates was observed when using a starch suspension prepared on anolyte. The best values of rheological characteristics of pates were obtained when using starch suspension with 2% starch prepared on anolyte. Conclusions. Electrochemically activated water had a significant effect on the physicochemical and rheological properties of semi-finished products, in particular corn starch suspensions, and pates prepared with them, and contributed to better structuring of the studied food systems.
Impacto do fluxo migratório internacional no estado de Santa Catarina sob ótica da inteligência de segurança pública
Authors: Paula Alan Pinheiro de , Sales João Marcos Tanan
Published: August 2023

O fluxo migratório internacional demanda a atuação dos gestores das políticas públicas nacionais, envolvendo não apenas os órgãos migratórios, mas também as outras pastas governamentais de todos os entes federativos, bem como a sociedade civil na acolhida dos imigrantes e refugiados. O estado de Santa Catarina vem protagonizando processos migratórios das mais diversas nacionalidades, necessitando para tal mister o devido acolhimento, sem deixar de reconhecer a própria migração interna, como já vem sendo administrado. O presente artigo visa a identificar as políticas necessárias, a partir da pasta relacionada à segurança pública e correlatas, para o adequado gerenciamento do fluxo de migrantes em Santa Catarina e a manutenção da ordem pública e incolumidade das pessoas e patrimônio. Inicialmente, serão apontadas as variáveis que determinam o fluxo migratório, seja por questão econômica, perseguição política, guerra, violência, questões ambientais, entre outras. Na sequência, será descrita a estrutura do estado de Santa Catarina no acolhimento dos migrantes internacionais e a atividade de inteligência estratégica na análise dos seus impactos no sistema de segurança pública.
Seletividade penal e agentes de controle no processo de criminalização primário e secundário
Authors: Steff Amelia Cristina Schimit , Borguezan Danielly
Published: August 2023

O presente trabalho visa analisar os processos de criminalização no Brasil, identificando eventuais fatores que repercutem em uma justa e adequada aplicação do direito penal de forma igualitária para com todos aqueles que incorrem na prática de infrações penais. Desse modo, traz-se para a discussão os processos de criminalização primário e secundário como forma de dar corpo ao presente artigo. O problema que move a pesquisa é: A igualdade formal e material, prevista constitucionalmente, é assegurada e observada no sistema penal nos momentos da criminalização primária e secundária? A hipótese principal do trabalho é: ao considerar a desigualdade social no Brasil, essa influencia de forma negativa no cumprimento do princípio da igualdade. A metodologia do trabalho foi de uma pesquisa explicativa, de natureza qualitativa, cujo objeto de estudo se deu por amostragem intencional ou por julgamento, a coleta aconteceu através de revisão bibliográfica e a análise de dados foi pela análise de conteúdo. Dentre os resultados encontrados, ficou confirmado que o sistema penal possui uma “clientela” preferencial em razão de fatores econômicos de modo que não há o esperado respeito à igualdade quando da aplicação da lei penal.
Legado histórico de la Comisión del Río Grijalva en Chiapas y Tabasco
Authors: Gallardo Zavaleta Víctor Alfonso
Published: August 2023

A partir de fuentes bibliográficas, de archivo e información de campo, este artículo presenta las experiencias de la Comisión del Río Grijalva (CRG) desde el desarrollo de sus funciones y su relación con las prioridades nacionales, como un legado histórico en términos de prácticas para la gestión del agua en las cuencas entre Chiapas y Tabasco. El artículo muestra el tránsito de la CRG desde su creación en 1951, hasta su desintegración en 1987, tiempo en el cual se fomentó la intervención de la cuenca en el sureste mexicano en el marco del Plan Integral del Sureste o de Desarrollo Regional. Su experiencia evidencia que la fuerte relación política de los proyectos en torno al agua ha tenido históricamente efectos para su realización, así como impactos sociales y ambientales que están presentes en la gestión de cuencas actuales. Pero también pone de manifiesto que dichas realidades presentes son producto de un concierto institucional de planes sectoriales, más que de una estructura burocrática uniforme, como en ocasiones se tiende a identificar a esta Comisión en la segunda mitad del siglo XX.
Las nuevas órdenes regulares masculinas de la Reforma y la Monarquía Católica, siglo XVI
Authors: Ramírez Méndez Jessica
Published: August 2023

Las nuevas órdenes regulares masculinas emanadas de la Reforma, objeto de estudio de este artículo, son aquellas que nacieron a la luz del impulso reformista católico en el siglo XVI. Éstas intentaron dar respuesta a las necesidades de la época que las hizo surgir. Al respecto, este texto aborda, de manera conjunta, los trece movimientos de la Reforma que lograron formalizarse como órdenes religiosas masculinas en el siglo XVI: nueve de clérigos regulares (teatinos, clérigos regulares del Buen Jesús, barnabitas, somascos, jesuitas, clérigos regulares de la Madre de Dios, camilos, caracciolos y escolapios), dos mendicantes (capuchinos y carmelitas descalzos) y dos hospitalarias (hospitalarios e hipólitos). A pesar de la innovación que representaron estos nuevos institutos religiosos, así como de la influyente presencia que tuvieron en los albores de la modernidad, son pocos los trabajos que los han analizado de manera conjunta. Al respecto, en las siguientes páginas expondré el nacimiento de tales órdenes regulares masculinas de la Reforma en lo general, puntualizando cuáles eran y cuál era su carisma, para luego atender su vinculación con las monarquías. Ejemplificaré tal asociación a partir de las que tuvieron su origen en territorios de la corona hispana, sin dejar de lado sus territorios ultramarinos.