bluuebunny/crossref_metadata_2025 huggingface dataset:
The Effectiveness of Multimodel Learning on Linear Motion Topics to Practice Student’s Problem Solving Skills
Authors: Agustina Aulia , M Abdul Salam , Haryandi Surya , Zainuddin Zainuddin , Dewantara Dewi
Published: December 2022

Problem-solving ability is important in learning for the achievement of learning objectives. This research aims to describe the effectiveness of multimodal learning on a linear motion to practice students' problem-solving skills. This research is part of developing digital teaching materials on linear motion in a multimodel setting to practice students' problem-solving skills. Using the ADDIE development model over five stages. The subjects of the class trial were 14 students, 11 girls and 3 boys, in class X MIPA 3 of the school in Banjarmasin. The effectiveness is seen from the achievement in multimodel learning in terms of the result of the pre-test and post-test. The results of the N-gain test show that visualizing 0,40 problems in the category, presenting problems into physics concepts 0,88 in the high category, planning the completion of 0,55 in the medium category, carrying out problem-solving 0,80 in the high category, re-examining and evaluating 0,50 is categorized as high. Overall, the gain was 0,62 in the medium category. The research conclusion shows that multimodel learning is effectively used to practice students' problem-solving skills. The implications in education are creating creative and skilled resources and increasing the quality of education to support the future. Suggestions for further research are to increase the number of test subjects, to guide the process of practising problem skills, to distinguish between pre-test and post-test questions, and to carry out the maximum phases of the learning model.
Effectiveness of Using E-learning at STEM-Based Sound-Wave Materials to Improve Collaboration Skills of High School Students
Authors: Hidayah Rizki Nur , Wiyono Ketang , Ismet Ismet
Published: December 2022

This study aims to see the effectiveness of STEM-based sound wave e-learning in improving the collaboration skills of high school students. The effectiveness test sample consisted of 30 SMAN 2 Palembang students selected with purposive sampling techniques. A collaborative skills rubric with three observers from Sriwijaya University's Master of Physics Education was the tool employed in this study. This study tested the effectiveness of using e-learning at STEM-Based Sound-wave materials to enhance students' established cooperation abilities. The t-test and N-Gain test are used for more reliable measurements to determine effectiveness. The t-test showed a significant increase in students' collaboration skills after being given treatment using e-learning at STEM-Based Sound-wave materials with tcount = 30.377, and the significance level was smaller than 0.05. N-Gain test showed that the e-learning at STEM-Based Sound-wave materials that had been developed significantly improved the collaboration skills of high school students with an N-Gain score of 0.68 in the medium category. The highest increase in the contribution aspect with an N-Gain score of 0.85, and the lowest in working with others with an N-Gain score of 0.62. These results showed that STEM-based sound wave e-learning is a good learning media option in physics learning to improve students' collaboration skills. It is recommended that further research be conducted on other 21st-century skills to find effective learning methods and media in responding to the challenges of life in the 21st century.
Pelatihan Pengembangan Instrumen Asesmen Berbasis Literasi untuk Guru
Authors: Anisah Giati , Aufa Ari Abi
Published: December 2022

Kemampuan guru dalam mengajarkan dan menilai kemampuan literasi perlu terus ditingkatkan mengingat banyak guru yang masih kesulitan dalam hal asesmen kemampuan literasi. Pengabdian ini bermaksud untuk memberikan pelatihan kepada guru dalam hal pengembangan instrumen asesmen literasi. Pengabdian ini menggunakan pendekatan proyek dengan metode utama yaitu tutorial dan praktik langsung yang dilaksanakan pada bulan Oktober 2021. Berdasarkan hasil angket, 88% guru setuju bahwa pelatihan memberikan tambahan pengetahuan mengenai literasi. 83% menyatakan setuju bahwa pelatihan ini memberikan dampak positif pada peningkatan kompetensi guru dalam hal menyusun instrumen asesmen literasi. Selain itu, 81% guru setuju bahwa pelatihan serupa perlu dilaksanakan kembali dengan topik yang berbeda. Instrumen asesmen hasil pelatihan ini divalidasi secara mandiri oleh peserta dan 68 dari 89 peserta (76%) instrumen asesmen yang dihasilkan memili kevalitan 61-80% dari seluruh soal yang dihasilkan. Dengan demikian, dapat disimpulkan bahwa pelatihan pengembagan instrumen asesmen berbasis literasi untuk guru ini telah berhasil membuat guru guru lebih kreatif dalam menyusun instrumen asesmen berbasis literasi, jenis soal lebih variatif, dengan validitas dan reliabilitas yang terjamin.  Dengan demikian, diharapkan siswa akan lebih terlatih dan kompeten dalam bidang literasi.  The teacher's ability to teach and assess literacy skills needs to be continuously improved, considering that many teachers still have difficulties assessing literacy skills. This service intends to train teachers in terms of developing literacy assessment instruments. This service uses a project approach, with the main technique being tutorials and hands-on practice, which will be held in October 2021. Based on the questionnaire results, 88% of teachers agree that the training provides additional knowledge about literacy. 83% agreed that this training positively improved teacher competence in terms of preparing literacy assessment instruments. In addition, 81% of teachers agreed that similar training should be re-implemented with a different topic. The participants independently validated the assessment instrument resulting from this training, and for 68 of the 89 participants (76%), the resulting assessment instrument had a validity of 61-80% of all questions generated. Thus, the training in developing literacy-based assessment instruments for teachers has provided additional knowledge, increasing teacher competence in preparing literacy assessment instruments.
Pelatihan Pembuatan Kompos Menggunakan Metode Takakura Sebagai Solusi Penanganan Sampah di Kelurahan Jatirejo Kota Semarang
Authors: Heriyanti Andhina Putri , Khusniati Miranita , Fariz Trida Ridho , Tirtasari Ni Luh , Haris Amnan , Jabbar Abdul
Published: December 2022

Kelurahan Jatirejo di Kota Semarang merupakan salah satu wilayah yang memiliki permasalahan sampah rumah tangga. Namun kegiatan pengelolaan sampah berbasis masyarakat terkendala oleh waktu dan biaya. Teknik pengomposan dengan metode takakura dapat menjadi solusi dalam pengelolaan sampah rumah tangga di Kelurahan Jatirejo, Kota Semarang. Berangkat dari hal tersebut, kami selaku tim pengabdian melalukan kegiatan pelatihan pembuatan kompos menggunakan metode takakura sebagai solusi penanganan sampah di Kelurahan Jatirejo. Tahapan dalam kegiatan pengabdian ini terdiri dari tahapan persiapan, sosialisasi dan praktik pembuatan kompos. Pada tahapan persiapan, tim pengabdi menggunakan EM4 dalam pembuatan kompos berdasarkan studi literatur. Selanjutnya, tim pengabdi melakukan kegiatan sosialisasi dan praktik pembuatan kompos dengan metode takakura. Setelah kegiatan praktik, para peserta tertarik untuk menerapkan pengomposan dengan metode takakura ditempat tinggal masing-masing. Pengetahuan tentang pemanfaatan sampah rumah tangga bagi ibu-ibu Kelurahan Jatirejo juga semakin berkembang melalui kegiatan pengabdian pelatihan pembuatan pupuk kompos dengan metode takakura. Untuk kegiatan selanjutnya, perlu diuji bagaimana tingkat partisipasi masyarakat Kelurahan Jatirejo dalam pengelolaan sampah berbasis kompos dengan metode takakura. Jatirejo Village in Semarang City is one area that has household waste problems. However, community-based waste management activities are constrained by time and cost. Composting techniques using the takakura method can be a solution to managing household waste in Jatirejo Village, Semarang City. Based on that problem, we as a service team conducted composting training activities using the takakura method to handle waste in Jatirejo Village. The stages in this service activity consist of preparation, socialization and the practice of making compost. In the preparation stage, the service team used EM4 in composting based on a literature study. Furthermore, the service team carried out socialization activities and the practice of making compost using the takakura method. After the practical activity, the participants were interested in applying compost using the takakura method in their respective places of residence. Knowledge related to the use of household waste for women in Jatirejo Village is also growing through service activities for making compost fertilizer using the takakura method. For the next activity, it is necessary to examine how the level of community participation in Jatirejo Village in compost-based waste management using the takakura method is needed.
Analisis Kepuasan Workshop Guru Penggerak Online di Trenggalek: Mengoptimalkan Keterampilan Penerbitan Ilmiah
Authors: Prahani Binar Kurnia , Wasis Wasis , Prastowo Tjipto , Sunarti Titin , Saphira Hanandita Veda
Published: December 2022

Banyak guru kini terdorong oleh kewajiban menerbitkan karya ilmiah untuk memperjuangkan kenaikan pangkat, khususnya di Trenggalek. Kegiatan Pengabdian kepada Masyarakat (PkM) ini dilaksanakan sebagai solusi atas permasalahan tersebut oleh mitra yang telah terbukti efektif dalam memberikan pelatihan penulisan artikel ilmiah/akademik kepada para pendidik guru khususnya di Kabupaten Trenggalek. PKM ini akan meningkatkan keterampilan maupun kemampuan para guru penggerak agar semakin terlihat dan akan berdampak positif langsung terhadap peningkatan kualitas pengajar di Provinsi Trenggalek khususnya penulisan ilmiah. Currently, especially in Trenggalek province, many motivated teachers need help to get promoted due to the obligation to publish academic papers. These findings reveal that teachers lack the knowledge and competence to prepare for scientific work. This community service activity was carried out as a solution to the problem of partners who have proven effective in providing training in writing scientific articles for teacher educators, especially in the Trenggalek Regency. This PKM will make the achievements of driving instructors more visible and will positively impact improving the quality of instructors in Trenggalek, especially in scientific writing.
Pengenalan Analisis Kualitatif Skala Mikro kepada Guru SMK Perkumpulan Pendidik Sains Kimia Indonesia (PPSKI)
Authors: Dinira Layta , Andayani Ulfa , Wiryawan Adam , Mulyasuryani Ani
Published: December 2022

Keterbatasan alat dan bahan praktikum merupakan permasalahan yang dihadapi oleh guru kimia di SMK. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan kreativitas guru SMK dalam mengatasi masalah tersebut. Guru SMK diberikan pembinaan praktikum pengenalan analisis kualitatif skala mikro. Kegiatan dilaksanakan dalam beberapa tahap, yaitu tahap persiapan, tahap pelaksanaan, dan tahap evaluasi. Tahap persiapan terdiri atas penyusunan diktat praktikum, persiapan alat dan bahan percobaan, pembuatan video praktik, serta pembuatan kuesioner. Tahap pelaksanaan berupa praktikum analisis kualitatif skala mikro dengan empat topik. Tahap evaluasi dilakukan dengan cara menilai tugas presentasi dan mengolah kuesioner berisi tanggapan peserta. Analisis data tersebut dilakukan secara deskriptif. Kegiatan pengabdian kepada masyarakat dilaksanakan pada tanggal 27 Juni 2022 hingga 20 Agustus 2022. Hasil kegiatan menunjukkan peserta dapat mendemonstrasikan praktikum pengenalan analisis kualitatif skala mikro dan kegiatan telah berlangsung dengan baik. Setelah mengikuti kegiatan ini, peserta dapat mengembangkan materi praktikum skala mikro sesuai kondisi di sekolah masing-masing sehingga keterbatasan alat dan bahan dapat diatasi.Chemistry teachers in vocational high schools face challenges due to practicum equipment and chemical limitations. The objective of this community service is to increase the creativity of vocational high school teachers in addressing this issue. Participants have enrolled in a practicum on microscale qualitative analysis. Preparation, implementation, and evaluation were the three stages of the activity. Making a practicum module, getting chemicals and equipment ready for experiments, filming practical videos, and creating questionnaires were all part of the preparation process. The implementation step was delivered as a four-topic microscale qualitative analysis practicum. The evaluation step was completed by evaluating the presentation tasks and descriptively analyzing the participants' questionnaire responses. The community service was performed between June 27th and August 20th, 2022. The results showed that participants could demonstrate microscale qualitative analysis. The community service was performed well. Following the community service, participants can create micro-scale practicum material based on their schools' conditions, overcoming equipment and materials limitations.
Strategi Pengembangan Produk Hasil Hutan Bukan Kayu (HHBK) Tanaman Aren (Arenga Pinnata) pada Kesatuan Pengelolaan Hutan Pulau Laut Sebuku
Authors: Mustaqim Musaddak , Rahayu Dewi
Published: December 2022

This study aims to determine the development strategy of aren plant products and the condition of palm farmers in Forest Management Units (KPH) Pulau Laut Sebuku. The data sources of this research are secondary data using documentation from the South Kalimantan Provincial Forestry Service and documentation data from Forest Management Units (KPH) Pulau Laut Sebuku. Primary data collection techniques are obtained through interviews with Forest Management Units (KPH) Puau Laut Sebuku with a structured questionnaire. The technique used is descriptive statistical analysis using cross tabulation to see the condition of farmers and SWOT analysis aims to determine the strategy for developing palm oil NTFP products that are more appropriate to the conditions and potential of the existing area. The results showed that the farming conditions of palm sugar still need to be improved in terms of developing NTFP products so that farmers can compete with other commodities. The development strategy is the S-O strategy, which is to use strength to take advantage of opportunities so as to make development policies that are right on target, namely developing public interest in advancing in order to increase the food industry made from palm sugar and increase the potential as a regional superior product with the role of local governments in the development of palm trees.
Valuasi Nilai Ekonomi Langsung Hutan Mangrove sebagai Penyedia Jasa Wisata di Pulau Burung Kabupaten Tanah Bumbu
Authors: Aswat Muhammad , Nur Muhammad Anshar
Published: December 2022

This study aims to determine the characteristics and assessments of visitor Pulau Burung Mangrove Forest s, willingness to pay, and the travel cost method. Data collection techniques in the form of observation, interviews using questionnaires and documentation with the number of respondents as many as 75 people. The data were processed using quantitative descriptive, willingness to pay, and the travel cost method. Based on the results of the study, it is known that the characteristics and perceptions of visitors vary widely, consisting of age, regional origin, gender, marital status, education level, occupation, total income, type of vehicle, information about tourist attractions, tourist attractions, motivation, additional facilities, security, officer services, accessibility, cleanliness, entrance tickets, willingness to pay and the respondent's travel costs.The results of this study, the willingness to pay value is Rp. 28,000.00 / person. In addition, the value of the travel cost method is known to be Rp. 165,667 / person. So that in one year each value of willingness to pay, and travel cost method for tourism in Bird Island Mangrove Forest is Rp. 169,668,000.00 and Rp. 1,004,970,500.00.
Analisis Prioritas Pengembangan Kawasan Objek Wisata Alam di Desa Tiwingan Lama
Authors: Setiawan Lurianto , Saipudin Saipudin
Published: December 2022

This study aims to (1) find out how the contribution of each criterion to the development of natural tourism objects in Tiwingan Lama Village, Aranio District, Banjar Regency, and (2) find out what alternative options are priority to be developed in Tiwingan Lama Village, Aranio District, Banjar Regency.Respondents in this study were 7 respondents who were considered experts and influenced the determination of the development of the tourism village area in Tiwingan Lama Village, which were used in data processing using the AHP (methodAnalytical Hierarchy Process).The results of this study indicate that the criteria for regional policies, regional potential, number of visitors, and community income influence the prioritization of the development of tourism village areas in the order of 27.7% regional policy preference values, 46.6% regional potential, 16.1% number of visitors, and 9.6% of people's income. Based on the three alternatives of priority selection for the development of the tourist village area, the alternative or potential for the Matang Kaladan hill has the highest preference value of 59.6%, Alimpung Park hill 23.8%, and Atawang hill 16.6%. With the most dominant conclusion is the Matang Kaladan hill (59.6%).
Analisis Dampak Kehadiran Layanan Go-food terhadap Pendapatan dan Laba Usaha Mikro Kecil Menengah (UMKM) di Pramuka
Authors: Maulidanto Brillian , Chandriyanti Ika
Published: December 2022

This study aims to determine and describe the impact of the presence of Go-food services on the income and profit of culinary MSMEs in Pemurus luar. The respondents of this study were MSME culinary entrepreneurs with data collection techniques through questionnaires, observation and documentation. The data analysis technique used was the Mann Whitney test,a test to see the difference in the median of the two groups. if the data is interval or ratio, then the distribution is not normal. The results of this study are Go-food has a major effect on the income and profit of culinary MSMEs in the field of snacks and heavy meals.
Analisis Faktor-Faktor yang Mempengaruhi Pendapatan Petani Padi di Kecamatan Babirik Kabupaten Hulu Sungai Utara
Authors: Reza Muhammad , Effendi Muhammad
Published: December 2022

This research was designed to (1) calculate land productivity; (2) to analyze effect of the land area, labor, seeds and fertilizers on the income of rice farmers; (3) find out the most dominant factors affecting the income of rice farmers. This research took the case study area in Babirik Sub-district, HSU disctrict. The data source is primary, obtained via questionnaires will be analyzed with multiple regression linier which will be tested through the f-test and the t-test. This research found that land productivity was up to standard. Then simultaneously land area, labor, seeds and fertilizers had an significant effect. Land area is the most dominant factor affecting the income of rice farmers.
Analisis Faktor-Faktor yang Mempengaruhi Permintaan Beras di Provinsi Kalimantan Selatan
Authors: Dewi Rosa Chintia , Wardhana Ali
Published: December 2022

This study was to determine the effect of rice prices, corn prices, rice production, and population simultaneously and partially on demand for rice in South Kalimantan Province in 2010-2019.This research was conducted in South Kalimantan using secondary data and then tested using a multiple linear regression analysis model by looking at the test results consisting of a partial test (t test) and simultaneous test (F test).The results of this study indicate that simultaneously the price of rice, corn price, rice production, and population have a significant effect on demand for rice in South Kalimantan Province. The partial test results show that the price of rice and total population have a significant effect, while the price of corn and rice production do not have a significant effect on demand for rice in South Kalimantan Province.
Tantangan Pemungutan Pajak Mineral Bukan Logam dan Batuan di Kabupaten Tanah Bumbu
Authors: Ramadhan Devi Amalia , Saleh Muhammad
Published: December 2022

This research is entitled “The Challenges Of Collecting Non-Metal And Rock Mineral Taxes In Tanah Bumbu District”. The purpose of this study (1) To determine the effectiveness of collecting MBLB Tax as a source of PAD in Tanah Bumbu Regency, (2) To determine the efficiency of the request for MBLB Tax on PAD in Tanah Bumbu Regency, (3) To determine the contribution of the request for MBLB tax to PAD Tanah Bumbu Regency. This study uses primary and secondary data with an annual series (time series) from 2010 to 2020. The source comes from (BPPRD) Tanah Bumbu. The analysis used quantitative descriptive analysis. The results of the research from the side of the effectiveness calculation show that an average of  86.81% is said to be quite effective, for the efficient calculation level the average reaches 9.46% with a category <20% it is said to be inefficient. Meanwhile, the contribution has reached 70.78%,  meaning that it has been able to  meaning that it has been able to make a large contribution  to PAD in Tanah Bumbu Regency.
Analisis Strategi Peningkatan Daya Saing Pengrajin Kain Tenun Khas Pagatan Kabupaten Tanah Bumbu
Authors: Ananda Noor Vania , Zulfaridatulyaqin Siti Siti Mutmainah
Published: December 2022

Tanah Bumbu regency has a group of home industries that produce pagatan woven fabrics. This fabric is a traditional cloth typical of the people of Tanah Bumbu Regency, South Kalimantan. The great potential to be able to develop pagatan weaving business to stay afloat and develop is the necessity to innovate the products produced. Pagatan woven fabric entrepreneurs are required to be able to utilize internal and external environmental conditions in developing their business, one of the efforts to facilitate in utilizing these conditions is to apply an environmental analysis that is SWOT analysis (Strength, Weaknesses, Opportunities, Treats). This research uses a type of quantitative research, the location of research conducted in Kusan Hilir Subdistrict. Research data source is primary data and data analysis used is descriptive analysis technique and SWOT analysis. The results showed the strategy used to improve the competitiveness of woven fabric typical pagatan Tanah Bumbu district is a strategy that is in quadrant II, S-T strategy (Strength-Treats) strategy that uses force to overcome threats.
Analisis Elastisitas Dan Tax Effort Bea Perolehan Hak Atas Tanah dan Bangunan (BPHTB) terhadap Produk Domestik Regional Bruto (PDRB) di Kota Banjarbaru Tahun 2011-2020
Authors: Arief Ichsanul , Saipudin Saipudin
Published: December 2022

This research aims to (1) Determine the level of elasticity of changes in GRDP caused by changes in BPHTB revenue in Banjarbaru for the 2011-2020 period and (2) To determine the tax efforts of BPHTB in the City of Banjarbaru for the period 2011-2020. This research uses descriptive quantitative research methods.This research uses descriptive quantitative research methods. The data used is secondary data sourced from the Central Bureau of Statistics and the Regional Tax and Retribution Management Agencies of Banjarbaru in 2011-2020. The results of the study show that from 2011-2020 as follows: (1) the elasticity level of GRDP changes caused by changes in Banjarbaru City BPHTB revenue has an average of 0.38% which means it tends to be inelastic or a value of less than 1 (E<1) . This indicates that BPHTB will experience a change of 1% due to an increase or decrease of less than 1% by GRDP. So that the growth of BPHTB revenue does not cause significant and significant changes (inelastic) due to changes in GRDP. (2) The level of tax effort also has an average value below 1, namely 0.404 (close to 0). The ability of the local government of Banjarbaru to collect BPHTB taxes is still low because it is far from the perfect value of tax effort, which is 1.
CORROSION RESISTANCE OF GALVANIC NICKEL DEPOSITS AND ELECTROCHEMICAL ACTIVITY OF THEIR CORROSION PRODUCTS
Authors: Uschapovskyi Dmytro , Linyucheva Olga , Vasiliev Georgyi , Liniuchev Oleksander , Kushmyruk Andrey , Redko Raisa , Pidvashetsky Gleb , Kurochenko Taras
Published: January 2023

Background. Bright galvanic nickel coatings, with high sulphur content, are less corrosion resistant than matte. Bright nickel coatings are particularly susceptible to corrosion damage in conditions that simulate tropical humid climates and are characterized by the presence of acetic acid vapours.
Objective. The purpose of the paper is to investigate: corrosion resistance of galvanic nickel deposits in concentrated acetic acid and its vapours, electrochemical activity of sulphide-containing corrosion products of bright nickel coatings.
Methods. Potentiodynamic and cyclic volt-amperometry have been used to study the electrochemical activity of galvanic nickel deposits and their corrosion products. The corrosion rate of galvanic nickel deposits has been determined by gravimetric method. Investigation of surface morphology and composition of galvanic deposits were performed using scanning electron microscopy and X-ray fluorescence analysis.
Results.The increased electrochemical activity of sulphide corrosion products of bright nickel coatings is evidenced by an order of magnitude higher cathodic current densities of CVA curves obtained in acetate buffer solutions, in comparison with bright and matte nickel galvanic deposits. It has been shown that at the deposition of sulphide corrosion products of bright nickel coatings on matte nickel foil the corrosion rate of last one increase at the exposition in concentrated acetic acid and its vapours.
Conclusions. Significant intensifying effect of sulphur on the corrosion of galvanic nickel deposits in concentrated acetic acid and its vapours has been established. In particular, this can be explained by the decomposition of nickel sulphide (which incorporates in the coating) in acetic acid. Sulphur in the oxidation state (-2) interacts with passive oxide coatings to form an adsorbed monolayer, which leads to the transition of nickel to the active state. Further research will focus on a deeper study of the electrochemical properties of corrosion products of bright nickel coatings.
EPIDEMIOLOGIA DA LEISHMANIOSE VISCERAL EM PALMAS, TOCANTINS
Authors: Logrado Júnior Vivaldo , Nunes Vieira Mateus , Botelho Marques Silva Karolyne , Botelho Mariano Sandra Maria
Published: December 2022

INTRODUÇÃO: A Leishmaniose Visceral (LV), também chamada de “Calazar”, é uma zoonose crônica causada pelo protozoário Leishmania infantum (Leishmania chagasi). É uma das endemias consideradas prioritárias pela Organização Mundial de Saúde (OMS), que estima a ocorrência de 300.000 a 400.000 casos novos a cada ano, em todo o mundo e com mortalidade global em 59.000 óbitos por ano. OBJETIVOS:  A pesquisa teve como objetivo realizar a arguição do perfil epidemiológico dessa patologia no Brasil entre 2009 e 2018. METODOLOGIA: realizou-se um estudo epidemiológico de natureza descritiva, por meio da coleta de dados anuais referente ao período entre 2009 até 2018, em Palmas-TO, disponibilizado pelo Sistema de Informação de Agravos de Notificação (SINAN), banco de dados do Departamento de Informação e Informática do SUS (DATASUS). RESULTADOS : Observou-se prevalência de casos em indivíduos do sexo masculino (65,01%) e também de óbitos (75%) em pessoas desse sexo. A faixa etária mais acometida em relação às internações foi a de jovens até 19 anos de idade (52,56%), e de óbitos, a de adultos entre 20 a 59 anos (41,66%). Os registros de internações por esta causa concentram-se em homens jovens. Acerca dos óbitos há prevalência em homens adultos. Além disso, observou-se grande desigualdade na distribuição das medidas preventivas para erradicação da patologia. CONCLUSÃO: A análise e estudo do perfil epidemiológico da LV no município de Palmas – TO permitiu identificar a prevalência de casos e óbitos em indivíduos do sexo masculino sendo jovens a faixa etária com mais internações e adultos com mais óbitos
Palavras-chave: Leishmaniose; Calazar; Lutzomya; Epidemiologia; Zoonose.
MALFORMAÇÃO ARTERIOVENOSA PULMONAR EM PACIENTE PEDIÁTRICO
Authors: Andrade Pontes Amorim Andressa Kellen , Rangel de Souza Aline , Oliveira da Silva Juliana , Leite Bitencourt1 Evandro , Nader Ferreira Pedro Eduardo
Published: December 2022

Introdução: As malformações arteriovenosas pulmonares (MAVP) são artérias que se conectam diretamente a uma veia através de pequenos aneurismas causando comprometimento da oxigenação e possível hipoxemia. Apenas 10% dos casos são identificados na infância. Cerca de 25-50% dos pacientes terão alguns sinais e sintomas, tais como cianose, baqueteamento digital, dispneia, fadiga e policitemia. Descrição: Este relato descreve o caso de um paciente do sexo masculino, 8 anos, apresentando história de cianose e desconforto respiratório desde o período neonatal sendo, aos 2 anos, diagnosticado com policitemia e aos 4 anos, com malformação pulmonar e insuficiência respiratória crônica, mantendo dispneia aos pequenos esforços (SatO2 entre 68-75%). Foi admitido no Hospital Infantil de Palmas devido dispneia progressiva e desconforto respiratório com as seguintes alterações ao exame físico: cianose intensa, baqueteamento digital e hemangioma em hemitórax direito. Os exames laboratoriais evidenciaram hemoglobina de 20,8. A angiotomografia do tórax mostrou a proeminência da vascularização vascular à direita, com aumento de calibre dos vasos pulmonares, identificação da artéria nutridora e veia de drenagem, com múltiplas e pequenas imagens nodulares na periferia pulmonar homolateral, no lobo superior direito, segmento superior e medial do lobo inferior direito. A arteriografia da artéria pulmonar direita evidenciou artéria com microfístulas arteriovenosas no segmento superior do pulmão, com drenagem para o átrio esquerdo. Para tratamento optou-se por uma lobectomia superior direita. Porém, foi necessária uma reabordagem de emergência, com toracotomia exploradora à direita para tratamento de uma hemorragia intrapleural e toracostomia com drenagem da pleura fechada, devido uma síndrome do coágulo retido e discrasia sanguínea. Paciente evoluiu com SatO2 de 70-82% ao uso de oxigênio. Recebeu alta da UTI após 2 semanas de pós-operatório. Conclusão: A abordagem cirúrgica nos pacientes pediátricos deve ser analisada com cautela antes da sua realização, para que não traga mais riscos do que benefícios ao paciente.
Requirements for Force Standards Used for Verification of Heavy Scales
Authors: Shmigelsky I. Yu. , Andreev D. V. , Ostrivnoi A. F. , Sychev V. V.
Published: December 2022

This article discusses the problem of verification of heavy scales by currently existing methods that involve the use of reference weights and the possibility of expanding the scope of force standards for verification of heavy scales. The essence of the problem is the existence of technological and economic difficulties in the application of these methods of transferring a measurement unit, as well as the incompatibility between the normalized metrological characteristics of mass measuring instruments and force standards.

The authors proposed a new method for transferring a measurement unit to heavy scales using force-reproducing hydraulic machines as force standards. Within the research, this method was tested, the requirements for force standards used for verification of heavy scales were formed, and experimental studies were carried out in order to verify the compliance of force standards with these requirements. On the example of hydraulic force-reproducing machines, the compliance of force standards with these requirements was shown.

There is described an approach to the metrological support of measurements of large masses using force standards. In view of the relative ease of the method implementation, a new method of transferring a measurement unit based on this approach has the prospect of becoming the most common and accessible method for verification of heavy scales. Therefore, it is advisable to expand the scope of existing 1st category force standards.
Karakterisasi Kelarutan Silika dari Fly Ash Kelapa Sawit dalam Larutan Basa Kuat (NaOH) dan Asam Lemah (C6H8O7)
Authors: Jayanti Regna Tri , Furqana Ramzi Annisa Aulia , Alfitra Muhammad Hanif
Published: January 2023

Pertumbuhan industri pabrik kelapa sawit masih cukup potensial di Indonesia, kajian produk samping hasil produksi pabrik kelapa sawit ini masih belum diolah dengan optimal. Pemanfaatan fly ash sebagai salah satu produk samping masih sangat perlu dikembangkan. Silika merupakan komposisi penyusun fly ash kelapa sawit yang sangat diminati saat ini karena memiliki potensi aplikasi dalam berbagai tujuan seperti pengolahan limbah, material semikonduktor, dan bahan aditif pertanian. Penelitian pengolahan silika dari abu hasil proses pembakaran tidak terlepas dari metode ektraksi yang sangat bergantung dari karakteristik kelarutan silika terhadap pelarutnya. Penelitian ini bertujuan untuk memberikan informasi karakteritik kelarutan silika yang berasal dari fly ash pabrik kelapa sawit dalam larutan berupa basa kuat (NaOH) dan asam lemah (C6H8O7). Aktivitas kelarutan silika dalam pelarut asam dan basa dilakukan dengan memvariasikan konsentrasi pelarut yaitu 1 M, 2 M, dan 3 M. Proses pelarutan silika dilakukan pada temperatur 60oC dalam waktu 60 menit. Karaketrisasi fly ash dilakukan dengan menggunakan instrumen XRD, XRF, dan SEM yang menunjukkan bahwa senyawa penyusun utama fly ash adalah CaO 68,894% dan SiO2 19,189 % yang terkandung dalam mineral kalsit, portlandite, dan kuarsa dengan morfologi yang heterogen serta ukuran partikel diantara 200 μm – 300 μm. Hasil pelarutan menunjukkan bahwa kelarutan silika tertinggi diperoleh dalam pelarut asam sitrat 2 M yaitu sebesar 26,35 %.
IMPROVING THE ENVIRONMENTALITY OF MOTOR GASOLINE
Authors: Trotsenko O. , Grigorov A.
Published: January 2023

The article considers measures aimed at improving the environmental situation of large cities by reducing the harmful effects of exhaust gases generated during the operation of road transport. It is substantiated that a direct increase in the environmental friendliness of motor gasoline is the most promising approach to reducing the toxicity of exhaust gases. This increase can be achieved by reducing dissolved hydrocarbon gases (C4H10 and iso-C4H10) and metals (Pb, Fe, Mn) in gasoline; facilitation of the fractional composition of gasoline (including the end-boiling temperature); reduction in gasoline content of sulfur, aromatic hydrocarbons and olefins. Reducing these undesirable, from an environmental point of view, components will improve the quality of gasoline to the Euro-5 requirements adopted in Ukraine, as well as significantly extend the service life of special catalysts installed on motor vehicles to clean exhaust gases.

The effect on the gasoline fraction (PK – 180 °C) and commercial gasoline A-95, oxygenates (methyl tert-butyl ether and ethyl alcohol) and 1,3-diphenyltriazene was studied. It is established that the use of 1% of the mass. 1,3-diphenyltriazene, in the composition of straight-run gasoline allows to increase its resistance to detonation by 12 points, reduce the toxicity of exhaust gases by 24% in terms of CO and 17% in terms of CH. It was determined that the addition of 1,3-diphenyltriazene to commercial gasoline A-95 in the amount of 1% by weight, in contrast to oxygenates, does not lead to a deterioration in the evaporation of gasolines and their physical stability.

The use of 1,3-diphenyltriazene in commercial gasoline, due to its positive properties, in the future will optimize the use of other additives, including oxygenates, which are widely used today in the technology of commercial gasoline.
APPLICATION OF ANALYTICAL CHEMISTRY AND CONTROL METHODS IN OXIDATION PROCESSES STUDIES OF CHEMICAL, FOOD BIOTECHNOLOGICAL AND PHARMACEUTICAL TECHNOLOGIES
Authors: Samoylenko S. , Belinska A. , Belykh I. , Blyzniuk O. , Masalitina N. , Myronenko L. , Varankina O.
Published: January 2023

Technological parameters, namely temperature and duration of β-carotene extraction process from filamentous fungus Blakeslea trispora biomass via vegetable oils with various fatty acid compositions and various contents of natural antioxidants (refined deodorized sunflower, high-oleic sunflower, corn and sesame) have been investigated. Statistical models of β-carotene dependences, as well as analytical numbers, characterizing content of free fatty acids (acid number) and primary products of lipid oxidation (peroxide number) content, in oil extracts of the specified refined deodorized oils, from temperature and extraction duration have been built.

Rational parameters of β-carotene extraction from Blakeslea trispora biomass with selected extractants (refined deodorized sunflower, high-oleic sunflower, corn and sesame oils) have been determined to control extract's technological properties. It has been proven that usage of these refined deodorized oils as extractants practically does not affect on the target product content in oil extracts of biomass, but it does affect on analytical numbers of extracts, characterizing content of free fatty acids, peroxides and hydroperoxides. The highest content of free fatty acids in β-carotene, containing biomass extraction with sunflower oil, has been observed. The minimum content of free fatty acids in extracts with corn and sesame oils has been be achieved. The highest content of primary products of β-carotene lipid oxidation (peroxides and hydroperoxides), containing biomass extraction by sunflower oil, has been observed. The minimum content of free fatty acids in extracts with usage of sesame oil has been achieved.

It is possible to predict β-carotene content, as well as acid and peroxide numbers of oil extracts from biomass in specified refined deodorized oils, depending on temperature and extraction process duration, using obtained approximation dependences.
Impact on the beam of the final length of the moving mass
Authors: Sharapata Andriy , Povalyaev Sergey , Yanyutin Yevgeniy
Published: January 2023

There have been considered solving direct problem of deforming of isotropic, elastic and hingedly supported beam of finite length. A roller moving at a constant speed along the axis of the beam acts on the beam. The roller has a cylindrical shape of a certain radius and a length that is greater than or equal to the width of the beam. The differential equations of beam motion are analyzed from the point of view of the influence of their components and especially the right-hand parts of the equations on the dynamic behavior of the beam in the case of using certain common materials of the beam and roller, and an option to reduce the equations to a more simplified form is proposed. The unknown functions included in the equations are sought in the form of Fourier series. This allows us to reduce the original equations to ordinary differential equations, which are solved using the Laplace transform. Expressions for coefficients in Fourier series are found using operational calculus and the residue theory. The results of the first numerical experiment on the study of the influence of the roller speed on beam deflections are presented in the form of curves in the figure. For a specific calculated mechanical system in the form of a steel roller, which moves along a steel beam at a constant speed under zero initial conditions, the research results are presented in the form of graphs of beam deflections for different speeds of the roller. The second numerical experiment was carried out to study the propagation of vibrational waves of the beam in the case of motion of the roller at a sufficiently high speed. For this, the figure shows the combined shapes of the beam and the position of the roller at different moments of action of the moving mass. The behavior of the beam at a high speed of movement of the roller was analyzed and a comparison of the deflections of the beam with the deflections of the static model of the beam was made. Further directions for the development of the problem in applied fields of technology and in inverse problems of identifying unknown parameters by indirect manifestations are outlined.
Three-dimensional representative volumetric elements for the construction of composite materials with improved mechanical properties
Authors: Degtyariov Kyryl , Kriutchenko Denys , Misura Serhii , Merkulova Alyona , Merkulov Dmytro , Євгенія Місюра
Published: January 2023

A methodological and software tool was developed for the effective assessment of the properties of three-dimensional composites of the matrix type and periodically structured composite materials using modern methods of boundary and finite elements. Continuum mechanics models have been modified to adequately describe the behavior of composites, numerical simulation models and software have been adapted to these models for solving static problems and problems in the frequency domain. The novelty, advantages and efficiency of the developed computer technology are provided by theoretically grounded models for the analysis of composites of three-dimensional configuration with non-canonical particle shapes, improvement of modern boundary and finite element methods and coupled algorithmic schemes to achieve high accuracy of calculation analysis; suitability for the analysis of both static and dynamic elastic fields in the considered structures. Calculation models and software tools have been developed that allow to take into account special forms of individual and interacting inhomogeneities in a three-dimensional matrix, in particular, with an emphasis on short fibers and tubes. These models and methods are applied to the study of static and dynamic characteristics of launch vehicle tanks made of various composite materials. For the studying free and forced oscillations of shell structures with compartments containing liquid, the method of natural modes  has been developed. Composites with an aluminum matrix with steel spherical inclusions and with steel and carbon fiber inclusions were considered as tank materials. The proposed models and computer simulation algorithms allow to carry out the numerical analysis of three-dimensional static problems under classical conditions of contact with the matrix; three-dimensional problems regarding the static interaction of a finite number of inclusions in the matrix; research of ordered and stochastically distributed inclusions; study of inclusions in the form of spheres, cylinders, carbon tubes and inclusions in the form of hollow spheres and to determine the effective elastic parameters of three-dimensional matrix composites with spherical inclusions, fibers and tubes. The results of the calculations showed strengthening of the obtained composite materials with a simultaneous decrease in density
A comprehensive approach to the analysis of the static and dynamic strength of the rotor of the smoke cleaner
Authors: Martynenko Volodymyr
Published: January 2023

The work describes the process of assessing the static and dynamic strength of the rotor of an axial smoke exhauster with twin blades which allow significantly increasing its efficiency. To build a calculation model for the strength analysis, the geometric model was simplified by removing bolted connections, slicing small surfaces, as well as modeling welds in the form of roundings and chamfers. Such simplifications made it possible to build a high-quality finite-element mesh with the sufficient accuracy for performing engineering calculations. Calculation models include a finite-element model of one sector of cyclic symmetry of the impeller of the smoke exhauster, which is used to more accurately determine its stress-strain state and local maximum stresses in the places of their concentration in the root sections of the blades and in the places where they are connected by jumpers due to the action of centrifugal forces, aerodynamic loads on the blade and thermal loads due to wheel heating, as well as a finite-element model of the entire rotor with a less detailed meshing of the impeller, which in this case plays the role of a mass-inertia element, and a more detailed meshing of the shaft to analyze its static strength and reactions in bearing assemblies from the action of gravity and determine natural frequencies and mode shapes of rotor vibrations and the possibility of resonances with multiples of the frequency of excitating loads. The analysis of the static strength of the impeller and the rotor shaft of the smoke exhauster was performed by comparing the von Mises equivalent stresses with the allowable stresses, and the analysis of the dynamic strength of the smoke exhauster rotor was performed by determining the level of detuning of the natural frequencies of vibrations from multiples of the frequency of the excitating load, which in this case was assumed to be the centrifugal forces acting on the unbalance of the rotating rotor. A detailed analysis of the results of calculations made it possible to establish that the elements of the smoke exhauster rotor meet the requirements of static strength under the action of all possible types of loads, and the natural frequencies of the rotor oscillations have a sufficient level of detuning from multiples of the frequency of the excitating load. In this way, a conclusion was made about the static and dynamic strength of the rotor of the smoke exhauster, which affect its resource and durability of operation in the nominal mode.
Коливання балок при розтязі в умовах повзучостіTIONS
Authors: Tatarinova Oksana , Morackovsky Oleg , Breslavsky Dmytro
Published: January 2023

Статтю присвячено підходу та аналітичним методам прогнозування змінювання власних коливань балок в умовах дії сил поздовжнього розтягу при повзучості. На базі класичного рівняння коливань балок при розтязі отримано метод оцінювання власних частот, які можуть змінюватись при повзучості. Отримано вирази для поздовжньої сили, що залежить від фізико-механічних параметрів матеріалу. Знайдено співвідношення для визначення часу істотного впливу повзучості на власні частоти. За допомогою отриманого виразу для значення часу до руйнування балки з використанням параметру суцільності Качанова запропоновано підхід до визначення впливу на частоти процесу накопичення прихованих пошкоджень. Випадок великих прогинів балки розглянуто у геометрично нелінійній постановці з використанням методу багатьох масштабів з розвиненням розв’язку за малим параметром. Розглянуто процеси динамічної повзучості, в якій прискорення швидкості деформацій повзучості в матеріалі забезпечується внеском амплітудних напружень. Розв’язок отриманого рівняння виконується методом зважених відхилів у формі Гальоркіна. Отримано залежності для визначення швидкості релаксації напружень у балці при повзучості. Оцінено граничні значення сили стискання з точки зору втрати стійкості стрижня в заданих умовах повзучості та можливості виникнення коливань. Виконано розрахункове моделювання та отримано результати, що дозволяють визначити чутливість частот власних коливань балок, виготовлених з різних конструктивних матеріалів, до розтягу при повзучості. Розглянуто жароміцні сплави, леговані сталі, титановий, алюмінієвий сплави та олов’яно-свинцевий припій при температурах, які притаманні типовим експлуатаційним умовам конструктивних елементів, що з них виготовляються. Показано, що найменший вплив повзучості на власні частоти виявлено для легких сплавів. За допомогою отриманих співвідношень проаналізовано частоти нелінійних коливань, що можуть відбуватись у балках, та побудовано скелетну криву.
Ключові слова: Коливання, власні частоти, повзучість, балка, розтяг, згин.