bluuebunny/crossref_metadata_2025 huggingface dataset:
Equações diofantinas lineares por meio da resolução de problemas
Authors: Berres Hartmann Andrei Luís , Pereira da Silva Lais Cristina , Rossato Binotto Rosane
Published: October 2023

O estudo das equações diofantinas teve início a partir das proposições de Diofanto de Alexandria, atualmente sendo capaz de subsidiar a resolução de problemas em diversas áreas e o trabalho com números inteiros em diversos contextos. Assim, este tópico tem sido abordado em cursos de licenciatura em matemática, especialmente na disciplina Teoria dos Números. Ao considerarmos estes aspectos, objetivamos apresentar uma possibilidade de trabalho com equações diofantinas lineares por meio da metodologia de ensino-aprendizagem-avaliação de matemática através da resolução de problemas (MEAAMaRP), adotada pelo Grupo de Trabalho e Estudos em Resolução de Problemas (GTERP), para cursos de licenciatura em matemática, a partir de uma experiência realizada em uma aula-piloto de um programa de pós-graduação. Para tanto, seguimos o paradigma qualitativo de pesquisa e realizamos uma intervenção em uma disciplina de um programa de pós-graduação em educação matemática com características de um experimento de ensino. Seguimos as dez etapas propostas para resolver um problema segundo a MEAAMaRP e utilizamos a análise de conteúdo para a organização e tratamento dos dados, principalmente suas três principais fases: pré-análise, exploração do material e tratamento dos resultados e interpretação. Pudemos constatar que os participantes se apropriaram do conceito de equações diofantinas lineares e realizaram inferências a partir do diálogo e tentativas de resolução dos problemas geradores. Assim, indicamos o trabalho com a resolução de problemas em cursos de licenciatura em matemática, já que é ele capaz de possibilitar ao estudante o desenvolvimento da autonomia e o trabalho em grupo, entre outros resultados.
Application of a Modification of the Grid-Characteristic Method using Overset Grids for Explicit Interface Description to Modelling the Relief of the Ocean Shelf
Authors: Stetsyuk V. O.
Published: October 2023

Introduction. The problem of modelling the propagation of elastic waves is of great practical importance when conducting seismic exploration. Based on it, a model of the environment under study is being built. At the same time, the quality of the constructed model is determined by the accuracy of solving the modelling problem, which ensures constantly increasing requirements for modelling accuracy. For accurate modelling, it is important to correctly describe and take into account the boundaries of the media. At the same time, the quality of the constructed model is determined by the accuracy of solving the modelling problem, which ensures constantly increasing requirements for modelling accuracy.

Materials and Methods. We have studied a modification of the grid-characteristic method on rectangular grids using overset grids to describe the interface of media of complex shape. This approach has previously been used to describe the earth’s surface when conducting simulations on land. This paper describes its application in modelling the relief of the ocean shelf.

Results. The use of the overset grid reduces the modelling error, the number of parasitic waves and artifacts and makes it possible to get a more visual picture.

Discussion and Conclusions. Overset grids can be used to describe the interface of media in modelling seismic exploration of the ocean shelf. Their use makes it possible to increase the accuracy of modelling and reduce the number of artifacts compared to using only one grid.
Mathematical Model of Three-Component Suspension Transport
Authors: Sukhinov A. I. , Kuznetsova I. Yu.
Published: October 2023

Introduction. Prediction of suspension deposition zones is required to assess and minimize the negative impact on the ecosystem of the reservoir during dredging within the framework of large-scale engineering projects, prediction of suspension deposition zones is required to assess and minimize the negative impact on the ecosystem of the reservoir. It is necessary to build a mathematical model that takes into account many factors that have a significant impact on the accuracy of forecasts. The aim of the work is to construct a mathematical model of transport of multicomponent suspension, taking into account the composition of the soil (different diameter of the suspension particles), the flow velocity of the water flow, the complex geometry of the coastline and bottom, wind stresses and friction on the bottom, turbulent exchange, etc.

Materials and Methods. A mathematical model for the transport of a multicomponent suspension and an approximation of the proposed continuous model with the second order of accuracy with respect to the steps of the spatial grid are described, considering the boundary conditions of the Neumann and Robin type. The approximation of the hydrodynamics model is obtained based on splitting schemes by physical processes, which guarantee fulfillment mass conservation for discrete model.

Results. The proposed mathematical model formed the basis of the developed software package that allows to simulate the process of sedimentation of a multicomponent suspension. The results of the work of the software package on the model problem of sedimentation of a three-component suspension in the process of soil dumping during dredging are presented.

Discussions and Conclusions. The mathematical model of transport of three-component suspension is described and software implemented. The developed software allows to simulate the process of deposition of suspended particles of various diameters on the bottom, and to evaluate its effect on the bottom topography and changes in the bottom composition. The developed software package also allows to analyze the process of sediment movement in the case of resuspension of multicomponent bottom sediments of the reservoir, which causes secondary pollution of the reservoi
Penanaman Sikap Nasionalisme Religius Melalui Aktivitas Kepanduan Hizbul Wathan Tahun 1950-1961
Authors:   Universitas Lampung, Vanli Pranita Dewi , M Syaiful , Susanto Henry
Published: October 2023

Kiai Haji Ahmad Dahlan mendirikan kepanduan dengan nama Hizbul Wathan di Yogyakarta pada tahun 1918. Hizbul Wathan bertugas untuk mendidik para pemuda dan diharapkan bahwa nantinya mereka akan berguna bagi tanah air dan persyarikatan Muhammadiyah, dengan mendirikan kepanduan Hizbul Wathan bercita-cita agar pemuda-pemuda Muhammadiyah mencintai tanah air dan bangsanya dengan dasar tuntunan agama Islam. Prinsip kepanduan yang digelorakan didalam HW ialah, Agama Islam (pembinaan akhlak mulia menurut ajaran Islam), ilmu jiwa (yaitu dalam latihan, pelajaran, dan permaianan, segalanya disesuaikan dengan keadaan dan umur anggota), kemerdekaan dalam bekerja dan latihan (segala bentuk kegiatan HW bukan paksaan, melainkan kesadaran diri para anggota). Adapun rumusan masalah dalam penelitian ini adalah “Apa sajakah bentuk-bentuk aktivitas kepanduan Hizbul Wathan dalam menanamkan sikap nasionalisme religius tahun 1950-1961?”. Tujuan dalam penelitian ini adalah untuk mengetahui bentuk-bentuk aktivitas Hizbul Wathan pada anggotanya. Metode yang digunakan pada penelitian ini adalah metode penelitian historis, serta teknik pengumpulan data yang digunakan ialah teknik kepustakaan dan teknik dokumentasi. Teknik analisis data kualitatif yang digunakan dalam penelitian ini yaitu pengumpulan data, reduksi data, penyajian data, dan verifikasi data. Berdasarkan hasil penelitian dan pembahasan, penulis mengambil kesimpulan, bahwa bentuk- bentuk aktivitas Hizbul Wathan terbagi menjadi dua, yaitu aktivitas fisik dan aktivitas non-fisik dan sikap nasionalisme religius tampak pada kegiatan berkemah yang dilaksanakan, PPPK (Pertolongan Pertama Pada Kecelakaan), baris-berbaris, tali-temali, permainan dan nyanyian, serta aktivitas rohani. Sikap nasionalisme religius yang tergambarkan melalui aktivitas Hizbul Wathan ialah sikap cinta tanah air, menjaga solidaritas saudara, berjihad, mematuhi kebenaran agama, menunjukkan ayat-ayat Al-Qur’an dan Al-Hadits, dan menayangkan simbol-simbol agama.
Strategi Budaya Masyarakat Lampung Pepadun Dalam Tradisi Mosok Di Kelurahan Jagabaya I Kecamatan Way Halim Bandar Lampung
Authors:   Universitas Lampung, Sinaga Risma Margaretha , Basri Muhammad
Published: October 2023

Tradisi mosok adalah pemberian suapan dan pemberian gelagh amai inai kepada pengantin. Tradisi mosok memiliki arti penting sebagai penyampaian pesan kasih sayang dari keluarga, terutama ibu kepada anaknya. Namun, terdapat permasalahan bahwa kemungkinan syarat tidak terpenuhi dan tradisi mosok berpotensi tidak dilaksanakan. Hal ini dikarenakan tidak semua keluarga merupakan keluarga yang besar untuk melengkapi syarat pemberi suapan. Selain itu, perkembangan zaman juga mendesak tradisi mosok untuk lebih fleksibel dalam waktu dan tempat pelaksanaan. Benda perlengkapan dalam tradisi mosok juga mengalami penambahan yang dikhawatirkan akan merubah makna. Berbagai permasalahan di atas dapat mempengaruhi keberlangsungan tradisi mosok. Namun, masyarakat Lampung memiliki strategi budaya dalam melaksanakan tradisi mosok guna mengatasi permasalahan yang ada. Oleh karena itu, tujuan penelitian ini ialah agar mengetahui bagaimana strategi budaya masyarakat Lampung pepadun dalam tradisi mosok di Kelurahan Jagabaya I. Metode yang digunakan dalam penelitian ini adalah pendekatan kualitatif. Penelitian ini menggunakan teknik pengumpulan data wawancara, observasi, dan dokumentasi. Teknik analisis data yang digunakan adalah teknik analisis data kualitatif. Berdasarkan hasil penelitian dan analisis yang dilakukan, maka dapat disimpulkan bahwa strategi budaya yang dilakukan masyarakat Kelurahan Jagabaya I dalam mempertahankan tradisi mosok yakni (1) Mengubah cara untuk memenuhi syarat tradisi mosok pada pemberi suapan dengan menggantikan pemberi suapan apabila tidak ada, (2) Mengedepankan fleksibilitas untuk menyesuaikan modernisasi pada tempat dan waktu pelaksanaan tradisi mosok, (3) Menerima perubahan dan penambahan benda perlengkapan yang tetap sesuai makna. Strategi budaya yang dilakukan masyarakat berimplikasi terhadap keberlangsungan tradisi mosok sehingga senantiasa dilaksanakan.
Pengaruh Model Pembelajaran Cooperative Learning Tipe Make A Match Terhadap Hasil Belajar IPS Siswa Kelas VIII SMP N 36 Bandar Lampung Tahun Ajaran 2019/2020
Authors:   Universitas Lampung, Sutrisna Elliyen
Published: October 2023

Penelitian ini bertujuan untuk mengetahui pengaruh model make a match terhadap hasil belajar IPS pada siswa SMP 36 Bandar Lampung. Metode yang digunakan dalam penelitian ini adalah quashi experiment, sedangkan teknik pengambilan data penelitian yang digunakan yakni tes hasil belajar. Populasi pada penelitian ini adalah siswa SMP 36 Bandar Lampung dengan sampel yang digunakan berjumlah 35 siswa. Data setelah terkumpul dianalisis dengan menggunakan paired sampel statisti. Hasil penelitian menunjukkan bahwa terdapat pengaruh yang signifikan antara model pembelajaran make a match menunjukkan nilai signifikansi 0,000 pada kelas make a match tes awal dan tes akhir dan dari distribusi frekuensi terdapat 0 siswa dengan niali sangat tinggi, 25 siswa dengan nilai tinggi, 10 siswa dengan nilai sedang, dan untuk nilai rendah dan sangan rendah terdapat 0 siswa pada tes awal. Pada tes akhir dari distribusi frekuensi terdapat 23 siswa dengan nilai sangat tinggi, 10 siswa dengan nilai tinggi, 2 siswa dengan nilai sedang, dan untuk nilai rendah dan sangat rendah terapat 0 siswa. Hal ini berarti kedua data tersebut terdapat perbedaan diantara pretest dengan posttest. Mengingat bahwa kriteria uji paired samples test adalah jika nilai signifikansi (2tailed) kurang dari 0, 005 maka data tersebut memiliki perbedaan pada hasilnya. Kesimpulan dari penelitian ini adalah model make a match memberikan pengaruh terhadap hasil pembelajaran IPS di SMP 36 Bandar Lampung.
Kearifan Lokal Dalam Tradisi Manjau Maju Masyarakat Lampung Saibatin Pekon Kedaloman Kabupaten Tanggamus
Authors:   Universitas Lampung, Pradanna Satrio Alpen , Adha Muhammad Mona , Siswanto Edi
Published: October 2023

Penelitian ini berfokus kepada nilai kearifan lokal dalam tradisi manjau maju Pekon Kedaloman Kabupaten Tanggamus. Tradisi manjau maju merupakan salah satu tradisi dalam perkawinan masyarakat adat Lampung yang hingga kini masih dipegang teguh oleh masyarakat Pekon Kedaloman sehingga penelitian ini bertujuan untuk memberikan gambaran dari pelaksanaan kearifan lokal dalam tradisi manjau maju serta menjelaskan nilai kearifan lokal yang terdapat dalam tradisi manjau maju masyarakat Lampung Saibatin Pekon Kedaloman Kabupaten Tanggamus, dengan menggunakan metode penelitian deskriptif kualitatif, dalam mengumpulkan data yang ada di lapangan penelitian ini menggunakan teknik observasi, wawancara dan dokumentasi, data yang dikumpulkan kemudian di analisis dengan menggunakan teknik analisis data oleh Miles and Huberman. Hasil penelitian ditemukan bahwa dalam kearifan lokal tradisi manjau maju dalam perkawinan masyarakat Lampung Saibatin Pekon Kedaloman kabupaten tanggamus, tradisi manjau maju adalah rangkaian acara adat Lampung merupakan bagian dari tradisi pernikahan adat Lampung Saibatin, dimana tradisi manjau maju dapat diartikan sebagai kegiatan memperkenalkan pengantin baik pengantin wanita maupun pengantin laki-laki kepada masyarakat dan lingkungan tempat tinggal dengan tujuan untuk berdaptasi dengan lingkungan sosial, sehingga mempermudah mereka dalam bersosialisasi, seperti halnya tradisi lain, tradisi manjau maju juga memiliki tahapan-tahapan didalam pelaksanaannya yang dimana didalam setiap rangkaian tahapannya terdapat nilai kearifan lokal yang masih dipegang teguh masyarakat Pekon Kedaloman.
Penggunaan Tutur di Kalangan Remaja Suku Jawa dalam Berkomunikasi di Desa Pelita Jaya Kecamatan Belitang Madang Raya Kabupaten OKU Timur Tahun 1984-2019
Authors:   Universitas Lampung, Dwipayana Novilia , Syaiful Syaiful , Sumargono Sumargono
Published: October 2023

Suku Jawa merupakan salah satu suku paling tua di Indonesia. Suku Jawa mempunyai ciri khas kebudayaan yang identik yaitu tradisi, perilaku, serta sikap hidup dari masyarakat Jawa. Suku Jawa dalam berkomunikasi menggunakan bahasa Jawa. Dalam komunikasi sehari-hari, bahasa Jawa sudah mulai ditinggalkan oleh para penuturnya. Penelitian ini bertujuan untuk mengetahui faktor-faktor perubahan penggunaan tutur dikalangan remaja suku jawa dalam berkomunikasi di Desa Pelita Jaya, Kecamatan Belitang Madang Raya, Kabupaten OKU Timur tahun 1984- 2019. Metode dalam penelitian ini adalah metode deskriptif dengan teknik analisis data kulitatif yaitu penelitian yang diuraikan dengan kata kata, fakta mengenai perubahan penggunaan tutur dikalangan remaja suku jawa dalam berkomunikasi di desa Pelita Jaya, Kecamatan Belitang Madang Raya, Kabupaten OKU Timur. Teknik pengumpulan data melalui wawancara, observasi, domunentasi. Hasil penelitian mengenai perubahan penggunaan tutur dikalangan remaja suku jawa dalam berkomunikasi di Desa Pelita Jaya, Kecamatan Belitang Madang Raya, Kabupaten OKU Timur tahun 1984-2019 adalah adanya beberapa faktor yang mempengaruhi perubahan turur itu sendiri yang disebabkan oleh faktor-faktor yaitu : faktor diri sendiri, faktor keluarga, faktor lingkungan, faktor perubahan zaman, faktor pendidikan.
Pengaruh Minat Belajar Terhadap Motivasi Belajar Siswa Di SMA Negeri 1 Waytenong
Authors:   Universitas Lampung, Novianti Miftah Shofiyah , Nurdin Nurdin , Pujiati Pujiati , Rizal Yon
Published: October 2023

Penelitian ini bertujuan untuk mengetahui pengaruh minat belajar terhadap motivasi belajar siswa siswa di SMA Negeri 1 Waytenong. Metode yang digunakan dalam penelitian ini yaitu deskriptif verifikatif dengan jenis pendekatan kuantitatif. Hasil penelitian ini adalah terdapat pengaruh positif dan signifikan dari minat belajar berpengaruh terhadap motivasi belajar yang ditunjukan dengan nilai thitung>ttabel yaitu 7,124 >1,661 dengan tingkat signifikansi 0,000.
Pengaruh Kedisiplinan Siswa Terhadap Hasil Belajar Pada Mata Pelajaran Sejarah Kelas XI IPS Melinting Tahun Ajaran 2019/2020
Authors:   Universitas Lampung, Setiawan Angga Andri , Maskun Maskun , Imanita Myristica
Published: October 2023

Pendidikan merupakan usaha sadar untuk mengembangkan segala kemampuan potensi yang dimiliki oleh seorang individu. Untuk tercapainya hasil belajar yang maksimal dapat dipengaruhi oleh faktor ekstern dan intern, salah satu faktor intern yaitu kedisiplinan pada siswa. Dalam hal ini, kedisiplinan memerankan peranan penting dalam proses belajar yang berpengaruh terhadap hasil belajar siswa, dalam pengamatan langsung di sekolah SMAN 1 melinting terdapat beberapa siswa yang menunjukan sikap tidak disiplin terhadap aturan-aturan yang telah di tetapkan oleh sekolah dengan ini peneliti tertarik melakukan penelitian dengan Rumusan masalah” Apakah ada pengaruh Kedisiplinan siswa terhadap hasil belajar mata pelajaran sejarah kelas XI IPS SMAN 1 Melinting tahun ajaran 2019/2020”. Penelitian ini adalah Untuk mengetahui apakah kedisiplinan siswa berpengaruh terhadap hasil belajar mata pelajaran sejarah kelas XI IPS SMAN 1 Melinting. Metode yang digunakan dalam pengumpulan data menggunakan metode quisioner (angket), metode dokumentasi, pengamatan atau observasi. Metode angket digunakan untuk memperoleh informasi dari responden, jenis angket langsung dan bersifat terbuka yaitu jenis angket yang sudah disediakan jawabannya. Teknik analisis data dengan menggunakan rumus product moment populasi dalam penelitian ini adalah seluruh siswa kelas XI IPS SMAN 1 Melintig tahun ajaran 2019/2020 berjumlah 55 siswa Berdasarkan hasil analisis regresi linear berganda kedisiplinan berpengaruh terhadap hasil belajar sejarah siswa dengan nilai koefesien determinasi (RSquare) sebesar 0.680 yang mengandung pengertian bahwa kedisiplinan berpengaruh sebesar 68% terhadap hasil belajar siswa, dari 5 indikator kedisiplinan siswa indikator ketaatan terhadap tugas tugas pelajaran berpengaruh paling tinggi sebesar 20.7%.
Pentingnya Irian Barat Bagi Indonesia
Authors:   Universitas Lampung, Harahap Dina Ulayani , Susanto Henry , Insani Marzius
Published: October 2023

Historically, Indonesia was a former colony of the Dutch East Indies or the former Dutch East Indies. The issue of West Irian as a continuation of the dispute between Indonesia and the Netherlands officially only arose at the enda of 1949. At the time, Indonesia was making vigorous efforts to find a away out through negotiations to resolve political disputes between the two sides, by the intercession of the United Nations (UN). The research method used in this study is, History research method, as for the stages of Historical research, namely, heuristics, criticsm, interpretation, and historiography. The data analysis techniques used are historical data analysis techniques. Using documentation and library data collection techniques. A dispute with the Dutch Colonial Government as a result of the colonialist’s appetite to occupy Indonesian territory was resolved in the hague through the round table conference in 1949 which resulted in Dutch recognition of Indonesia’s sovereignty and independence. However, in the conference there is still an unresolved issue, namely the status of West Irian. The purposw of The Liberation Of West Irian from dutch neo-capitalists was Sukarno did not want to be indifference again if West Irian was freed and became the henchman of the liberal capitalist imperialist state that Sukarno considered could harm the existence of the Republic Of Infonesia social democratic state at that time.
Analisis Instrumen dalam Evaluasi Pembelajaran di Sekolah
Authors:   STKIP PGRI Bandar Lampung, Mahrunnisya Dyanti
Published: October 2023

Pengembangan pendidikan tidak dapat dipisahkan, dari tanggung jawab pendidik, bagaimana pendidik merencanakan, mengorganisasikan, melaksanakan serta mengevaluasi kegiatan pembelajaran merupakan satu kesatuan yang tidak dapat di hindari dalam proses pembelajaran. Pendidik tidak hanya memberikan pengetahuan kepada peserta didik namun harus mampu menentukan instrumen evaluasi sebagai bentuk mengontrol kemampuan peserta didik. Penelitian ini bertujuan untuk membahas beberapa instrument evaluasi dalam pembelajaran. Penelitian ini menggunakan metode Systematic Literature Review (SLR), dengan pendekatan deskriptif kualitatif dengan data sekunder sumber referensi dari buku, website, dan jurnal baik nasional dan internasional. Hasil penelitian ini mengungkapkan bahwa Evaluasi mencakup kegiatan merencanakan, melaksanakan penilaian, mengolah, dan menganalisis hasil penilaian. Melakukan evaluasi merupakan kegiatan yang dapat membantu pendidik untuk lebih meningkatkan kualitas pembelajaran. Dengan kegiatan ini pendidik mampu menemukan kelebihan dan kekurangan di dalam pembelajaran, sehingga dapat dapat menemukan solusi atau metode lain yang bisa menjadikan tolok ukur bagi pendidik dan peserta didik untuk mencapai tujuan pembelajaran yang diinginkan.
Measuring the Planck Length and the Speed of Gravity with a Newton Cradle and a Photogate
Authors: Haug Espen G.
Published: October 2023

We demonstrate how one can remarkably use a simple Newton’s Cradle combined with an accurate photogate (also known as time-gate or speed-gate) to deduce the speed of gravity, as well as the Planck length. We conducted 100 observations and found values quite close to those observed from other methods. The fact that we can extract the speed of gravity, as well as the Planck length, from just accurate measurements of the ball’s speed in Newton’s Cradle, is in line with the predictions from recent literature.
Hungarian and Polish Democratic Backsliding: Two Stories with the Same Ending
Authors: Meneley Cory
Published: October 2023

In recent years countries such as Hungary and Poland in Europe, as well as India and Brazil in the global south, have featured in the news as examples of democratic backsliding. Hungary and Poland have shared histories as post-Warsaw Pact countries- they share many characteristics and are both parliamentary democracies-and members of the EU- and yet they have experienced different rates of democratic backsliding. What are the similarities and differences between Poland and Hungary- and how have they resulted in different rates of democratic backsliding? I will analyze how both countries are similar before testing six theories of democratic backsliding-as presented by Waldner and Lust (2018)- for both countries, including (1) agency-based theories, (2) political cultures theories, (3) political institutions theories, (4) political economy theories, (5) social structure and political coalitions theories, and (6) international factors theories, before I compare their differences and distinguish what set them apart.
First Robot-Assisted Ivor Lewis Operation with Manual Intrapleural Anastomosis for Corrosive Esophageal Stricture
Authors: Avzaletdinov A. M. , Pavlov V. N. , Vildanov T. D. , Gimazova A. I. , Zdorik N. A. , Musakaeva K. R.
Published: October 2023

Introduction. Esophageal pathology constitutes a small share in general morbidity, however, it remains highly relevant due to its social and clinical significance. Corrosive strictures account for a large proportion among benign esophageal diseases. Treatment of the disease starts with intraluminal surgery. However, it provides only short-term effect due to the tendency of esophageal strictures to restenosis. In case of treatment failure, esophagoplasty is performed. The esophagoplasty according to Ivor Lewis with the formation of manual intrapleural anastomosis was performed in the BSMU Clinic. The abdominal and thoracic phases were performed using Da Vinci Si robotic surgical system. By the time of publication of this paper, the authors have gained experience of 15 successfully performed surgeries of this kind.Materials and methods. The paper presents a clinical case of robot-assisted esophagoplasty according to Ivor Lewis performed on patient Y., born in 1978, with the clinical diagnosis: corrosive strictures of the lower third of the esophagus with dysphagia of III–IV degree. The pathology developed as a result of surrogate alcohol consumption in September 2017. Since October 2017, the patient has been regularly treated in the Thoracic Surgery Unit of the BSMU Clinic, where she underwent a number of endoscopic surgeries, which appeared to provide a little effect. The patient underwent a subsequent surgical treatment including esophagoplasty according to Ivor Lewis with the formation of manual intrapleural anastomosis using Da Vinci Si robotic system.Results and discussion. First three days of the postoperative period, the patient remained in the Anaesthesiology and Intensive Care Unit. She received step-by-step parenteral and enteral nutrition. Control fl uoroscopic examinations revealed timely, disturbances-free evacuation and no contrast leakage from the formed anastomosis. The patient was discharged on day 11 in satisfactory condition.Conclusion. Using Da Vinci robot-assisted system in Lewis esophageal plastic surgery has a number of specific features. It provides more precise tissue extraction with preservation of stomach and esophageal vessels, moreover, mobility of the instruments enables the key phase to be performed, namely — manual suturing in the esophagoanastomosis. As a result, the risk of postoperative complications is reduced.
Features of the Course of Radioinduced Breast Cancer. Clinical Observation
Authors: Zamilov M. M. , Menshikov K. V. , Musin Sh. I. , Sultanbaev A. V. , Zamilova G. I. , Nguyen A. H.
Published: October 2023

Introduction. Hodgkin’s lymphoma is most commonly reported in the young age of 20 to 40 years. Radiation therapy remained the first-choice option before the advent of modern chemotherapy agents. Thereafter, the risk of radioinduced breast cancer after radiotherapy with total radiation dose of 38 Gy or more increased 4.5-fold.Materials and methods. The presented clinical case demonstrates aggressive breast cancer that developed 43 years after radiation therapy for Hodgkin's lymphoma.Results and discussion. In the 1990s, chemotherapy regimens for Hodgkin’s lymphoma were not effective enough to control the disease, therefore, radiotherapy was an indispensable measure. Secondary radioinduced tumors take the second place (26 %) in the structure of mortality from Hodgkin’s lymphoma. The emergence of new, more effective chemotherapy regimens reduced the risk of secondary tumors and, in particular, breast cancer.Conclusion. At present, up to 75 % of patients with Hodgkin’s lymphoma can be cured using modern methods of chemotherapy and radiation therapy. In follow-up care, it is necessary to consider the high risk of secondary malignant neoplasms, especially lung and breast cancer.
Delayed Surgical Treatment of Cervical Spine Injury in an Adolescent Patient
Authors: Karpov D. A. , Shakurov E. F. , Farkhutdinov T. A. , Kulmanova L. A. , Antonov A. V. , Strepetkov E. V.
Published: October 2023

Introduction. Cervical spine injury is recognised as one of the most disabling types of vertebral column and spinal cord injuries. With a high level of disability, this type of injury remains quite rare among children. The main types of complications in this kind of injury include impaired regulations of the respiratory and cardiovascular systems, tetra- and paraparesis, and pelvic organ disorders. The analysis of recent publications indicated early surgery (in less than 24 hours) as the main condition for reducing post-traumatic complications.Materials and methods. The paper presents a clinical case of delayed surgery (in more than 24 hours) performed in a 17-year-old patient who was admitted to hospital after a traffic accident. After diagnostic measures, according to indications, a delayed surgery was performed on day 3: anterior spine fusion at the level of C5-Th1 with the installation of a vertebral body endoprosthesis and fixation with a bone plate.Results and discussion. The present case confirms the need for patients with combined spinal cord injury and mild traumatic brain injury to undergo a full range of diagnostic examinations including: brain and spine imaging, and, in the presence of compression and signs of spinal cord injury, MRI of the spinal cord (if necessary, the brain) at the level of injury. In the absence of gross structural damage to the brain, urgent decompression of the spinal cord and spine stabilization are indicated to eliminate the traumatic and spinal shock.Conclusion. Mild traumatic brain injury cannot be considered a contraindication for delayed cervical spine surgery. The present case is indicative of early surgical treatment of spinal injury, especially of the cervical spine, without neurological onset. All diagnostic measures were performed in full. Despite the surgical treatment and rehabilitation measures, the neurological deficit in the patient was not completely eliminated and persisted after 1 year.
ECOLINGUISTICS AND THE EDUCATION OF YOUNG PEOPLE
Authors: Roe Jasper , Chenghao Zhu , Huat Chau Meng , Qingli Guo , Jacobs George
Published: October 2023

Most ecolinguistic analysis is conducted with texts produced for the general public. This article explores the use of ecolinguistics in the education of young people. The analysis focuses on young people’s media, specifically focusing on films. Two children’s movies (The Lorax and Back to the Outback) are analyzed using the ecolinguistic concept of stories we live by and the ecojustice concept of intersectionality. This analysis is undertaken to explicate these concepts in the hope that others will employ these same concepts to analyze other texts. These example analyses are explained about classroom practice and generating “noticing” as a learning outcome. Finally, five further techniques for involving students and others in ecolinguistic and ecojustice analysis are described. This article gives important insight into practical tools that can benefit teachers and students in the classroom. Additionally, children’s films and other media developed for children and youths may also be useful for the enjoyment and education of adults.
The Effect of Online Customer Reviews on Purchase Intention With Customer Trust as A Variable in Purchase Decision on Sociolla Consumers
Authors: Tanuwijaya Christina Kelly , Ellitan Lena , Lukito Robertus Sigit Haribowo
Published: October 2023

Purpose: This study aims to analyze the effect of Online Customer Reviews on purchase intention with customer trust as a purchasing decision variable for Sociolla consumers.

Method: This research is using the Non Probability Sampling method with Purposive Sampling. The sample used in this study was 250 respondents with characteristics; Men and women aged 17 years and over, know and have an account on the Sociolla website, and have also shopped at Sociolla in the last 3 months. Data was collected by distributing questionnaires and using the SEM-PLS Software 4.0 analysis technique for analysis.

Results: The results of this study indicate that Online Customer Reviews has a positive influence on customer trust on the Sociolla website, customer trust has a positive influence on consumer buying interest to shop online, and Online Customer Reviews has a positive influence on consumer buying interest through customer trust to shop on line.
The Effect of Flow Factor on Brand Attitude and Purchase Intention in Mobile Legend: Bang-Bang
Authors: Anandya Dudi , Indarini  , Darsono Brilliant Prabowo Agung
Published: October 2023

Purpose: This research aims to analyze the influence of flow antecedents, which can elicit brand attitudes and purchase intentions.

 

Method: By design, this research is included in causal research, which aims to examine causal relationships between variables. The scale used is an interval of 7 points. The target population is active mobile legends: Bang-bang players who play at least two games daily. The player must have purchased at least two items in the last six months and be 17 years old. Purchase decisions must be made with the player's considerations. The number of samples collected was 300 respondents. The sampling technique used is non-probability sampling with a purposive sampling method. The analysis technique used is structural equation modeling with two stages. The analysis technique used is structural equation modeling with two stages. Hypothesis testing uses a t-test with an alpha of 10%.

 

Result: Only skills that do not contribute to the formation of flow. This result is in line with previous research, so the role of skill as an antecedent needs to be studied further. Flow has been shown to shape brand attitudes and purchase intentions.
ELECTRICAL PROPERTIES INVESTIGATION OF Ag8GeS6 SINGLE CRYSTAL
Authors: Filep M.J. , Pogodin A.I. , Malakhovska T.O. , Kokhan O.P. , Chundak S.Yu. , Kayla M.I. , Skubenych K.V.
Published: October 2023

The compounds of the argyrodite structure have high conductivity values in the solid state due to the simultaneous coexistence of a "rigid" anionic framework and disordered cationic sublattice. In this regard, argyrodites are considered to be promising superionic materials for use as a working element of solid-state batteries. This work presents the results of the study of the electrophysical parameters of Ag8GeS6 single crystal grown by directional crystallization from the melt technique. It was found by the XRD method that the grown Ag8GeS6 single crystal crystallizes in a low-temperature orthorhombic modification with unit cell parameters: a = 15.147 Å, b = 7.469 Å, c = 10.584 Å. The frequency (10 Hz - 0.3 MHz) and temperature (20 - 110°C) dependence of the electrical conductivity was studied on a single crystal plate of Ag8GeS6 oriented in the (011) plane by impedance spectroscopy. The frequency dependence of the total electrical conductivity of Ag8GeS6 shows an increase in the total electrical conductivity with increasing frequency, which is typical for mixed ionic-electronic conductors. It was determined that the total conductivity of the Ag8GeS6 single crystal is 3.82 × 10-5 S/cm, and the activation energy is 0.728 eV.

Keywords: argyrodites; single crystals; electrical conductivity; phase analysis.
QUASIBINARY SYSTEM Ag7PSe6– Ag2Se
Authors: Sabov V.I. , Barchiy I.E. , Piasecki M. , Filep M.J. , Pogodin A.I. , Sabov M.Yu.
Published: October 2023

Semiconductor binary and ternary argentum selenides are of considerable practical interest, particularly as promising thermoelectric materials. These include Ag2Se, a narrow-band semiconductor, and Ag7PSe6, with a disordered cationic sublattice and a rigid anionic framework that causes efficient phonon scattering. Doping of Ag7PSe6 with the narrow bandgap semiconductor Ag2Se should increase its conductivity and Ag2Se with a more disordered Ag7PSe6 argyrodite phase to a decrease in thermal conductivity. In both cases, this should increase the thermoelectric figure of merit of the respective phases. At the same time, establishing the conditions for obtaining doped phases requires studying the conditions of their existence in the Ag7PSe6-Ag2Se system. Present work studies phase equilibria in the Ag7PSe6-Ag2Se system in the entire concentration range. A corresponding phase diagram was constructed based on the X-ray phase and differential thermal analysis results. It was found that the Ag7PSe6-Ag2Se system is quasi-binary. It is characterized by four processes: two eutectoid processes at 405 K and 433 K, caused by the presence of two polymorphic modifications in Ag2Se and Ag7PSe6, respectively; eutectic process at 893 K (the coordinates of the eutectic point are 893 K and ~8 mol% Ag2Se) and monotectic process at 977 K. Above this temperature, in the concentration range of ~9 - ~87 mol%, a region of immiscibility in the liquid is observed. The homogeneity regions of the initial components are less than 5 mol%.
Keywords: quasibinary system; selenides; phase equilibria; phase diagram.
PHASE EQUILIBRIA IN THE SECTION Cu2Se – Cu3SbSe4
Authors: Chorba O.J. , Sabov M.Yu. , Filep M.J. , Pogodin A.I. , Malakhovska T.O.
Published: October 2023

Complex selenides are promising thermoelectric materials in a wide temperature range. Since one of the methods for improving material parameters is the formation of solid solutions, the study of phase equilibria and the determination of the homogeneity regions of the components is relevant. This paper presents the results of a study of the physico-chemical interaction in the CuSe2 – Cu3SbSe4 system. The synthesis of alloys of the CuSe2 – Cu3SbSe4 system (0; 10; 30; 50% 70; 90; 100 mol. % Cu3SbSe4) was carried out by a direct one-temperature method at a maximum synthesis temperature of 1053 K. The obtained alloys were studied by X-ray phase, differential thermal and microstructural analyses. Based on the results of the analyses, it was found that CuSe2 – Cu3SbSe4 system is a partially quasi-binary section of the quasi-ternary Cu2Se–Sb2Se3–Se system. The section of CuSe2 – Cu3SbSe4 is characterized by the passage of four nonvariant processes. The studied section crosses the region of primary crystallization of the phase with congruent melting character - β-Cu2Se and the miscibility gap in liquid phase. The region of boundary solid solutions based on the initial components CuSe2 and Cu3SbSe4 does not exceed 5 mol.%.
Keywords: selenides; phase diagram; thermal analysis; phase equilibria.
ELECTRICAL CONDUCTIVITY OF SINGLE CRYSTALLINE Ag7PS6
Authors: Filep M.J. , Pogodin A.I. , Malakhovska T.O. , Kokhan O.P. , Kayla M.I. , Skubenych K.V. , Rosokha I.V.
Published: October 2023

The search and study of new materials suitable for use in the newest solid-state batteries is an important direction of modern solid-state ionics. Among the potential materials, it is worth mentioning compounds of the argyrodite family. The characteristic feature of these phases is the presence of a disordered cationic sublattice, which provides significant cationic conductivity in the solid state. This work presents the results of studies of the electrical conductivity of a single crystalline sample of ltm-Ag7PS6. The single crystal of Ag7PS6 was grown by the method of directional crystallization from the melt. The crystal was identified by means of XRD method. It was found that the grown Ag7PS6 sample crystallizes in a low-temperature modification in a primitive cubic cell. The frequency (1×101–3×105 Hz) and temperature (25-100°C) dependence of the total electrical conductivity was measured on an oriented and specially prepared ltm-Ag7PS6 single crystalline plate (using gold contacts). The total conductivity of Ag7PS6 single crystals is 6.51×10–7 S/cm (t = 25°C). According to the results of temperature studies of the dependence of the total conductivity, the thermal activation nature of the conductivity was established.

Keywords: argyrodites; single crystals; phase analysis; electrical conductivity.
IN SILICO STUDY OF PYRIMIDINARYLTELLURIDES AS POTENTIAL INHIBITORS OF PLASMODIUM FALCIPARUM
Authors: Kut M. , Korol N. , Onysko M. , Lendel V.
Published: October 2023

Malarial plasmodia are increasingly developing resistance to existing antimalarial drugs, posing a serious threat to successful treatment. Previous studies have demonstrated the inhibitory activity of compounds containing an exocyclic aryltellurium fragment against Plasmodium falciparum. This research focused on evaluating the inhibitory potential of fused pyrimidinaryl tellurides against falcipain-2 (FP-2), a crucial therapeutic target in the fight against malaria. Among the tested tellurides, 2-(((4-methoxyphenyl)thelanyl)methyl)-2,3-dihydro-5H-thiazolo[2,3-b]quinazolin-5-one demonstrated the most stable protein-ligand complex with the receptor 2GHU. The ligand exhibited a binding energy of -6.18 kcal/mol and an inhibition concentration of 29.74 μM. Notably, the ligand interacted with specific amino acids of the receptor, including HIS27, ASP23, TYR199, LYS184, and ALA21. Additionally, a 100 ns molecular dynamics study confirmed the stability of the falcipain-2 complex with this thiazoloquinazolinaryltellurtrichloride, further supporting the potential of compound 1. Importantly, the tested substance exhibited superior inhibitory capability against Plasmodium falciparum compared to antimalarial drugs such as mefloquine, primaquine, and chloroquine, making it a candidate for in vitro evaluation of antimalarial activity.
Keywords: malaria; Plasmodium falciparum; telluride; Falcipain-2; 2GHU.
COMPLEXES OF p-METHOXYPHENYLTELLURIUM TRICHLORIDE WITH ALLYL THIOETHERS OF 5-ARYL-1,3,4-OXADIAZOLE
Authors: Kut M. , Kut D. , Krivovjaz A. , Onysko M. , Lendel V.
Published: October 2023

1,3,4-Oxadiazole and its functional derivatives have a wide spectrum of biological activity. There are well-known examples of the use of oxadiazoles in materials science as high-energy molecules. Therefore, the synthesis of new functional derivatives based on them is an urgent problem. This paper describes the synthesis of allylic thioethers of 5-nitrophenyl-1,3,4-oxadiazole by the alkylation reaction of the corresponding thiones with allyl bromide in an alcohol-alkaline medium. Such thioethers were studied in reactions with phenylselentrihalides, as a result of which oxadiazolo[2,3-d][1,3,4]thiaselenazinium halides were synthesized. We investigated the interaction of the tellurium-containing analogue p-methoxyphenyltellurium trichloride with allylic thioethers of 5-nitrophenyl-1,3,4-oxadiazole. It was established that the reaction between p-methoxyphenyl tellurium trichloride and the investigated alkenyl thioethers within 8 hours occurs with the formation of adducts of the substrate-electrophile composition 1:1, regardless of the ratio of reagents. Attempts to change the polarity of the solvent, increase the reaction time, and change the temperature regime did not change the direction of the reaction. Based on the obtained experimental spectral data and elemental analysis data, the structure of the obtained complexes is proposed.
Keywords: p-methoxyphenyltellurium trichloride; 1,3,4-oxadiazole; allyl thioethers; organotellurium compounds; molecular complexes.
Laboratory and Numerical Analysis on The Effect of Using Coconut Fibre as Additive Towards Residual Shear Strength of Soil for Slope Construction
Authors: Ahmad Juhaizad , Rughan Nurfarihah Raihan , Ibrahim Anas , Rosli Mohd Ikmal Fazlan , Abdul Rahman Abdul Samad
Published: October 2023

Rapid development of Malaysia has caused population growth in urban areas. This includes new development near slope areas. Utilization of waste material such as coconut fiber could help to increase the slope stability. There is a limited study on the effects of coconut fibre as an additive for slope construction. This study aims to compare the shear strength between treated and untreated residual soil and to assess the Factor of Safety (FOS) with coconut fibre addition using Slope/W. A total of 15 shear box samples were set at the same percentage of coconut fibre (1% by weight of soil). Coconut fibre with different length of 15mm, 25mm, 35mm and 45mm was used in the study. It was found that coconut fibre could increase the shear strength. The optimum length of coconut fibre to achieve the maximum friction angle is 35mm, with soil internal friction angle of 52.15ᵒ. Moreover, the Slope/w analysis is conducted to analyse the slope's safety factor. The slope's safety factor increased significantly with the addition of coconut fibre. Based on the findings, this research could shed some light on the effect of coconut fibre incorporated in soil as an additive to improve the shear strength. Using coconut fibre in slope stabilisation could reduce slope failure and at the same time could save the environment by utilizing this waste material.
Effects of ZnCl2 Catalyst Loading in Hydrothermal Carbonization of Cotton Textile Waste to Produce Hydrochars
Authors: Rosly Muhammad Kasyfil Adha , Wan Kamis Wan Zuraida , Ali Bashah Nur Alwani , Isa Norain , Inderan Vicinisvarri , Mohd Din Azam Taufik
Published: October 2023

Hydrothermal carbonization (HTC) is a thermochemical process that utilizes biomass as feedstocks to produce hydrochars as solid fuel. Cotton textile wastes (CTW) are abundant; most are landfilled or incinerated, causing environmental pollution. CTW is rich in cellulose, thus suitable as biomass feedstock. HTC at a moderate temperature below 230 °C yields low-value hydrochars with low carbon content; however, an acid catalyst enhances the reaction. In this study, zinc-activated cotton textile waste (Zn-CTW) was synthesized via incipient wetness impregnation and used as a catalyst in hydrothermal carbonization to produce hydrochars. The reactions were conducted in a batch reactor at a temperature of 200 °C for 3 h. The effects of ZnCl2 catalyst loading on CTW were studied. The characteristics of hydrochars in terms of surface morphologies, hydrogen/carbon (H/C) and oxygen/carbon (O/C) ratios and surface functional groups were affected by the ZnCl2 loading on CTW. The results show that the hydrothermal carbonization of Zn-CTW-1.5 obtained hydrochars with the lowest H/C and O/C ratio values of 1.286 and 0.614, respectively. The FTIR analysis indicates stretching vibration of the C-O bond, which are the carboxylic acids and esters formed in the hydrochars. The hydrochars' surface morphologies show irregular and rough surfaces. It is concluded that Zn-CTW has the potential as a heterogeneous catalyst to produce hydrochars via hydrothermal carbonization
Transformation of Physical Characteristics in Fired Clay Bricks by Adopting Waste-based Fluxing Agent
Authors: Mazlan Mazlini , Abdul Wahab Rabiatul Adawiyah , Sanusi Nur Syafiqa Hamiza , Mohd Nasli Nur Hanis Syazwani , Junaizi Nurul Athirah Balqis
Published: October 2023

The current practices in the recent development of fired clay brick (FCB) by adopting waste materials have tremendously reduced the usage of the primary source of FCB, which is clay soil (CS). In this study, the main objective is to reduce the utilisation of CS as the main component in the FCB-making process. Other waste materials such as soda lime silica (SLS) glass bottles, and sea shells (SS) were also added into the precursor admixtures. The admixtures containing CS, SLS and SS were mixed according to the empirical formula of (1-x)[40SLS - 60CS]: x[SS] = 0, 10, 20, 30, 40 wt.%. A batch of 40 g mixture was prepared, and 21% water was added. The admixtures were mixed, moulded into a rectangular brick shape, and dried before the sintering process at 850 °C. The physical properties of the FCB were investigated as a function of the SS content in the form of apparent density, linear shrinkage, loss of ignition and plasticity. As a result, the apparent density and loss of ignition of the FCB increased from 1.91 gcm-3 to 2.31 gcm-3 and 10.60 % to 20.81%, respectively. The linear shrinkage and plasticity percentage decreased from 2.50% to 2.27% and 11.01% to 8.70% with an increase of SS content. This study has uncovered the above findings, and has demonstrated a promising discovery of the SS as a possible substitute in FCB.