bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the influence of production fluctuation of high-production gas well on service security of tubing string
Authors: Zhang Zhi , Wang Jiawei , Li Yanjun , Liu Hexing , Meng Wenbo , Li Lei
Published: August 2021

The production of high temperature and high pressure gas wells fluctuates with time, which makes the pressure in the string fluctuate obviously and affects the service security of tubing string. In this paper, a pressure fluctuation model of the complete production process (including well opening, production and shut-in) is established, which is suitable for the multiphase flow of gas well. The pressure fluctuation in the tubing string is simulated. Influence of different well depth and average production on the fluctuating pressure of gas well are analyzed. According to the research results, if the well opening time top is 50 s, a transient pressure fluctuation is generated at wellhead and drops gradually. After the production starts, a pressure fluctuation will occur at wellhead 10~15 s after top, which is small and attenuates quickly. Pressure increases quickly in the shut-in moment and reaches the peak at tsh. Although pressure increases gradually with the well depth, fluctuation flattens out. The hysteresis phenomenon in appearance of pressure wave becomes more and more obvious with the well depth. The greater the production of gas well, the greater the pressure fluctuation in tubing string during well opening and production, but the value may not be very high. During well shut-in, the greater the production, the greater the pressure fluctuation and the value. Amplitude, angular frequency and value of phase are in direct proportion to pressure fluctuation degree and valve radix is in inverse proportion to pressure, which means that the greater the valve radix, the smaller the pressure.
Desafios enfrentados pelos idosos nas unidades de saúde
Authors: Belotto Leonardo Felipe de Sampaio , Dupont Patricia , Santos Siegrid Kurzawa Zwiener dos
Published: August 2021

Objetivo: Expor as dificuldades relacionadas à comunicação enfrentadas pela terceira idade no SUS. Revisão bibliográfica: O Brasil está tendo o mesmo destino dos países desenvolvidos, ou seja, está aumentando a expectativa de vida, causando o envelhecimento populacional, sendo assim, a saúde pública deve se adaptar à essa nova realidade. Alguns autores relatam que os idosos superestimam o atendimento na Atenção Primaria à Saúde (APS), isso faz com que se tornem dependentes do sistema. Além disso, outros estudos apontam que é necessário analisar o paciente idoso de maneira sistêmica, já que, por muitas vezes seu acompanhante pode omitir informações, caso o paciente esteja sendo violentado e/ou seja dependente. Considerações finais: Diante de tais motivações encontradas, faz-se necessário um trabalho socioeducativo com os profissionais e com a população com o intuito de demonstrar como observar a linguagem corporal, além de expor as opções de melhoria ao cuidado integral ao paciente idoso, melhorando assim, a relação médico-paciente idoso.
Clinical difference between single subtype and mixed subtype chronic urticaria: A retrospective study
Authors: Mao Manyun , Yuan Yan , Xiao Yangjian , Peng Cong , Chen Xiang , Li Jie
Published: August 2021

Background:

The subtypes of chronic urticaria share a common clinical expression, but may show differences phenotypically. Meanwhile, two or more different subtypes of chronic urticaria can coexist in any given patient which may involve different phenotypes.

Aims:

The study aims to compare the two phenotypes in terms of demographics, clinical profile and treatment response.

Methods:

In this retrospective study, 2678 chronic urticaria patients were divided into the single subtype chronic urticaria group and mixed subtype chronic urticaria group as was appropriate.The differences in the clinical features, possible causes, urticaria activity score of seven days, dermatology life quality index score, laboratory investigations and response to treatments were evaluated among the two groups.

Results:

An obvious female predominance was detected in chronic urticaria, especially in mixed subtype chronic urticaria patients. Of the 2678 chronic urticaria patients, there were 837(31.25%) mixed subtype chronic urticaria. Chronic spontaneous urticaria combined with symptomatic dermographism was the most common group in the mixed subtype chronic urticaria. Patients with mixed subtype chronic urticaria were more likely to have associated chest tightness/shortness of breath and showed greater urticaria activity. In patients with single subtype chronic urticaria, the positive rate of family history with allergic rhinitis, asthma or urticaria was lower. Based on evaluation of the treatment, control with second-generation antihistamines at licensed doses was achieved in only 38.83% of mixed subtype chronic urticaria patients, compared with 56.32% of patients with single subtype.

Limitations:

First, this study was a single-center design retrospective study. Second, omalizumab treatment was not included. Third, the differences between different subtypes of mixed subtype chronic urticaria were not discussed in detail.

Conclusion:

This study showed that mixed subtype chronic urticaria had some distinct features. Comprehensive knowledge about it may help us define effective therapeutic strategies and improve symptom control and the quality of life for chronic urticaria patients.
Harnessing E-Collaboration for Rural Tourism Recovery after COVID-19: Dual Analysis using SWOT and Porter’s Diamond Model
Authors: Purwaningsih Mardiana , Purwandari Betty , Sunarso Fathia Prinastiti , Setiadi Farisya
Published: August 2021

IT for rural tourism was in place before the COVID-19 pandemic emerged; however, the initiatives were intermittent and isolated. The effects of the pandemic encourage e-collaboration to accelerate the recovery of tourism. This study explores the opportunities, strategies and barriers to e-collaboration in tourism business activities. Systematic literature studies were carried out by the PRISMA approach and analyzed with the fuzzy Delphi method (FDM). Meta-analysis results are mapped in a matrix combination of SWOT and Porter’s Diamond Model. This matrix was discussed with experts selected based on their experience in IT-based collaborative activities through FDG. This study’s driving factors are management commitment, culture, trust, citizens, and local community involvement. Inhibiting factors are a lack of IT, the risk of conflict, and particular parties’ domination. Several strategies to increase e-collaboration opportunities are empowering local entrepreneurship, encouraging continuous innovation, and sharing knowledge. Conflict management and increasing trust between members need to be considered to overcome barriers to e-collaboration. This study provides a novel overview of the main issues discussed in previous tourism research regarding the importance of IT to accelerate economic recovery in the face of disruption, such as a pandemic. The study examines the case of Indonesia and hopes to become a reference for optimizing IT for the recovery of rural tourism in developing countries with similar characteristics. Doi: 10.28991/esj-2021-01297 Full Text: PDF
Применение отработанных нефтепродуктов как топлива для термического обезвреживания отходов
Authors: Nikolaeva Arina V. , Kozhevnikov Vitaly А. , Chernykh Vera A. , Naydenov Oleg V. , Davletyarov Rustam R. , Salnikov Alexander V.
Published: August 2021

All processes of turnover of oil and petroleum products are accompanied by the formation of various oilcontaining wastes, some of which are used petroleum products that have energy value. In addition, in the national economy, waste masses of other origin are formed, which also require disposal and/or incineration. During the reconstruction of the incinerator complex of Transneft - Port Primorsk, LLC, an energy - and resource-saving technology for thermal solid waste incineration was implemented. The KTO-100 unit was developed and put into operation, which burns used oil products and diesel as fuel. The heat obtained in the process of thermal incineration of waste enters the heat network of the site of treatment facilities for the company’s self-needs. The results of tests and control of the composition of industrial emissions of KTO-100 during the trial operation confirmed the stable indicators of the minimum (significantly lower than the current norms) concentrations of pollutants. The KTO-100 installation, implemented on the basis of Transneft - Primorsk Port, LLC, meets the criteria of the best available technology regulated at the federal level. During the reconstruction of the incinerator complex in Transneft - Port Primorsk, LLC, innovative materials were used and technical solutions were implemented in a combination that has no analogues in Russia today.

Все процессы оборота нефти и нефтепродуктов сопровождаются образованием различных нефтесодержащих отходов, часть которых составляют отработанные нефтепродукты, имеющие энергетическую ценность. Кроме того, в народном хозяйстве образуются массивы отходов иного происхождения, которые также требуют утилизации и/или обезвреживания. В процессе реконструкции инсинераторного комплекса ООО «Транснефть - Порт Приморск» реализована энерго- и ресурсосберегающая технология термического обезвреживания твердых отходов. Разработана и внедрена в эксплуатацию установка КТО-100, сжигающая в качестве топлива отработанные нефтепродукты и дизельное топливо. Теплота, полученная в процессе термического обезвреживания отходов, поступает в тепловую сеть участка очистных сооружений на собственные нужды предприятия. Результаты испытаний и контроля состава промышленных выбросов КТО-100 за время опытной эксплуатации подтвердили устойчивые показатели минимальных (существенно ниже действующих нормативов) концентраций загрязнителей. Установка КТО-100, реализованная на базе ООО «Транснефть - Порт Приморск», соответствует регламентированным на федеральном уровне критериям наилучшей доступной технологии. При реконструкции инсинераторного комплекса в ООО «Транснефть - Порт Приморск» применены инновационные материалы и реализованы технические решения в совокупности, которой на сегодня нет аналогов в России.
Formation of a corporate mechanism for managing the socio-economic development of enterprises in the agricultural sector of the economy
Authors: Klychova Guzaliya , Zakirova Alsu , Valiev Ayrat , Ziganshin Bulat , Salahutdinova El'vira
Published: August 2021

The monograph scientifically substantiates and formulates the conceptual provisions of the formation of a corporate mechanism for managing the socio-economic development of enterprises in the agricultural sector of the economy. Within the framework of the concept, the main directions of development of management consulting are defined; a mechanism for the formation and disclosure of information on the social responsibility of enterprises is developed; a system of control support for social activities is proposed. The book is intended for researchers, practicing accountants, managers of various levels, heads of agricultural enterprises, teachers, doctoral students, postgraduates and undergraduates, students of centers and advanced training courses.
PROPERTIES IMPROVEMENT ON POLYESTER FABRIC USING POLYVINYL ALCOHOL
Authors: MOSES JEYAKODI , P. Sathish , M. Keerthivasan , R.J. Pragadeesh , A. Pranesh
Published: August 2021

Polyethylene terephthalate is one of the important synthetic ester polymeric material used in widespread areas.  In textile industry, this fibrous material finds use in most of the garment and apparel applications due to its ease of handling, maintenance, and drying and competes with cotton materials.  However, due to the maximum hydrophobic behavior, this textile material gives number of issues like accumulation of statics, negligible moisture content, poor comfort and aesthetic characters.  Hence, in order to use this polyester material in the general textile industries particularly for garment and apparel productions, it is necessary to increase to some extent of its hydrophilic character by the application of some suitable chemicals like polyvinyl alcohol.  In these context, in this work an attempt is made to treat the polyethylene terephthalate fabric with sodium hydroxide followed by polyvinyl alcohol so as to increase the aesthetic properties.  The output received after the polyvinyl alcohol treatment on this fabric gives the good results expected for the garment applications.
RESUMO DE TESE: MANIFESTAÇÕES PATOLÓGICAS EM HABITAÇÕES DE INTERESSE SOCIAL CONSTRUÍDAS COM O SISTEMA LIGHT WOOD FRAME NO SUL DO BRASIL
Authors: Sousa Rodrigo Vargas , Librelotto Lisiane Ilha , Do Valle Ângela
Published: August 2021

Nos últimos anos vem crescendo o uso do sistema construtivo Light Wood Frame (LWF) no sul Brasil, principalmente, para construção de Habitações de Interesse Social (HIS). Assim este trabalho analisou o desempenho técnico-construtivo e as manifestações patológicas ocorrentes nas edificações no sul do Brasil. O método utilizado baseou-se em multimétodos, já consagrados nas áreas de Avaliação Pós-Ocupação (APO), engenharia diagnóstica e restauro das edificações. O método leva em consideração o ponto de vista dos especialistas (arquitetos, construtores e pesquisadores), mas também a satisfação dos usuários, para diagnosticar aspectos a corrigir das habitações estudadas. Foram utilizados procedimentos de inspeção tradicionais e elaboraram-se mapas de danos, ferramentas comuns no restauro de edificações. Os resultados apontam as principais manifestações patológicas ocorrentes nas Habitações de Interesse Social construídas com Light Wood Frame no Sul do Brasil.
Mapping of fishing area (Euthynnus affinis) GIS based in Bone’s Bay Waters
Authors: Daris Lukman , Jaya Jaya , Massiseng Andi Nur Apung
Published: August 2021

The purpose of this study was to identify the relationship between oceanographic factors and the catch of tuna (Euthynnus affinis) and to determine the potential fishing zone (ZPPI) in the waters of the Gulf of Bone. The data collection method is carried out by literature study and field observation study by taking coordinate points and measuring oceanographic parameters. The types of data collected were temperature, salinity, currents, and tuna catches. Data were analyzed using GIS software with the Kolmogorov-Smirnov normality test and ANOVA test. This research was conducted in Bone Bay Waters in October-November 2018. The results showed that the highest catch based on sea surface temperature was in the range of 32°C with a total yield of 1207.5 kg, the highest net based on salinity was in the field of 34‰, namely as much as 836.5 kg, and the highest catch is based on a current speed of 0.04 m/sec, which is as much as 334.5 kg. Based on the ANOVA table, the significance value of the effect of temperature (X1), salinity (X2), and current (X3) simultaneously on the tuna catch (Y) is 0.0425<0.05 and the Fcrit>Ftabel (5.960>4,75) which means that there is a significant effect of oceanographic parameters on the tuna catch. Overlay analysis of oceanographic parameters shows potential areas for Euthynnus affinis is located most of the waters of Sinjai to the south of the Sembilan Island to the outside of Bone Bay.
Analisis Penerimaan Yoghurt Sari Almond dengan Penambahan Kurma
Authors: Firdatama Anisa , Priyanti Esteria
Published: August 2021

The purpose of this study was to determine the acceptance of almond extract yoghurt mixed with dates. This research was divided into 3 stages. The first stage included preparing ingredients and equipment and preparing formulas for almond extract yoghurt with dates. The second stage involved adding dates into almond extract yoghurt. The third stage was the implementation of the hedonic test and the ranking test. The percentage of adding dates in the production of almond extract yoghurt was as much as 10, 20, and 30% of the weight of the almond extract, respectively. Thirty (30) untrained panelists participated in the hedonic and rating tests. The nonparametric analysis Kruskal Wallis test and the Mann-Whitney further test were used to examine the data. The Kruskal Wallis test showed significant differences in taste, aroma, texture, and color between almond extract yoghurt with dates. The Mann-Whitney test showed that the taste, aroma, viscosity, and color of almond extract yoghurt with the addition of dates as much as 10% were significantly different from 20% and 30%. It can be concluded that the addition of dates can increase the acceptance of the taste, aroma, viscosity, and color of almond extract yoghurt.

Keywords: Almond extract; dates; yoghurt; acceptance

 

ABSTRAK

Tujuan dari penelitian ini yaitu mengetahui penerimaan yoghurt sari almond dengan penambahan kurma. Penelitian ini terdiri atas tiga tahap. Tahap pertama meliputi persiapan bahan dan peralatan serta penyusunan formula yoghurt sari almond dengan penambahan kurma. Tahap kedua yaitu proses pembuatan yoghurt sari almond dengan penambahan kurma. Tahap ketiga yaitu pelaksanaan uji hedonik dan uji peringkat. Persentase penambahan kurma pada pembuatan yoghurt sari almond yaitu sebanyak 10%, 20%, dan 30% dari berat sari almond. Uji hedonik dan uji peringkat melibatkan 30 panelis tidak terlatih. Data dianalisis menggunakan analisis nonparametrik uji Kruskal Wallis dan uji lanjut Mann-Whitney. Hasil uji Kruskal Wallis menunjukkan penambahan kurma memberikan perbedaan yang nyata pada penerimaan rasa, aroma, kekentalan dan warna yoghurt sari almond. Uji lanjut Mann-Whitney menunjukkan bahwa rasa, aroma, kekentalan dan warna dari yoghurt sari almond dengan penambahan kurma sebanyak 10% berbeda nyata dengan 20% dan 30%. Dapat disimpulkan bahwa penambahan kurma dapat meningkatkan penerimaan rasa, aroma, kekentalan dan warna yoghurt sari almond.

Kata kunci: Kurma; penerimaan; sari almond; yoghurt.
Experimental Design to Enhance Dopamine Electrochemical Detection Using Carbon Paste Electrodes
Authors: Blum Soraya , Zahrebelnei Felipe , Nagata Noemi , Zucolotto Valtencir , Mattoso Luiz , Garcia Jarem , Pessoa Christiana , Wohnrath Karen
Published: August 2021

Efforts have been made on the development of new modified electrodes to be used in the fast determination of neurotransmitters, either in commercial drugs or in biological samples. Determination of dopamine (DA), for example, is of great importance since the lack of this neurotransmitter is related to many neurological disorders, including Parkinson’s and Alzheimer’s diseases. In this paper, we present a detailed electrochemical characterization, as well as DA detection studies of paste electrodes incorporating carbon materials in different allotropic forms, including carbon black modified with intrinsically conducting polymers (Eeonomers®), pristine carbon black, graphite, and carbon nanotubes. Emphasis is put on the smaller particle size and larger specific surface area of CB Eeonomers® materials, which led to an improved electroanalytical performance for the developed devices. The electrodes fabricated with Eeonomers® modified with polyaniline exhibited the higher current response towards DA detection, in addition to the ability of distinguishing DA from its natural interferent, ascorbic acid. Furthermore, a central composite design was used to investigate the influence of pH and electrode composition (proportion of Eeonomers®) on the electrochemical sensing of DA. A greater sensitivity was achieved for 50:50 (w/w) KP20/KPy20 electrode at pH 7.0. The optimized devices showed to be promising tools to perform quick, cheap and sensitive detection of this neurotransmitter in bioanalytical systems.
Development and Testing of a Sedation Scale for Use in Rabbits (Oryctolagus cuniculus)
Authors: Raulic Juliette , Leung Vivian SY , Doss Grayson A , Graham Jennifer E , Keller Krista A , Mans Christoph , Sadar Miranda J , Vergneau-Grosset Claire , Pang Daniel SJ
Published: August 2021

In biomedical research, rabbits are commonly sedated to facilitate a variety of procedures. Developing a sedation assessment scale enables standardization of levels of sedation and comparisons of sedation protocols, and may help in predicting sedation level requirements for different
procedures. The goal of this study was to develop a rabbit sedation assessment scale using a psychometric approach. We hypothesized that the sedation scale would have construct validity, good internal consistency, and reliability. In a prospective, randomized, blinded study design, 15 (8 females,
7 males) healthy 1-y-old New Zealand white rabbits received 3 intramuscular treatments: midazolam (0.5 mg/kg; n = 6); midazolam (1.5 mg/kg)–ketamine (5 mg/kg; n = 7); and alfaxalone (4 mg/kg)–dexmedetomidine (0.1 mg/kg)–midazolam (0.2 mg/kg; n = 3). One
rabbit received 2 treatments. A sedation scale was developed by using psychometric methods, with assessment performed by 6 independent raters who were blind to treatment. Final sedation scale items included posture, palpebral reflex, orbital tightening, lateral recumbency, loss of righting
reflex, supraglottic airway device placement, toe pinch, and general appearance. The scale showed construct validity, good to very good interrater reliability for individual items (6 raters; intraclass correlation coefficient, 0.671 to 0.940), very good intrarater reliability (5 raters; intraclass
correlation coefficient, 0.951 to 0.987), and excellent internal consistency (Cronbach α, 0.947). The sedation scale performed well under the conditions tested, suggesting that it can be applied in a wider range of settings (different populations, raters, sedation protocols).
Analisis Kesalahan dalam Menyelesaikan Masalah Matematika Kontekstual pada Materi Bangun Ruang Sisi Datar Berdasarkan Newman Error Analysis Ditinjau dari Gender
Authors: Amin Khairul , Kamid Kamid , Hariyadi Bambang
Published: August 2021

Penelitian ini bertujuan untuk menganalisis kesalahan siswa dalam menyelesaikan masalah matematika kontekstual berdasarkan Newman Error Analysis ditinjau dari gender. Jenis penelitian ini adalah penelitian kualitatif deskriptif. Dalam menentukan subjek penelitian ini menggunakan teknik purposive sampling. Subjek penelitian ini berjumlah 6 orang, masing-masing terdiri atas 2 orang siswa ketegori kemampuan matematika tinggi, sedang dan rendah. Teknik pengumpulan data dilakukan dengan tes dan wawancara. Berdasarkan hasil penelitian mengenai kesalahan yang dilakukan pada subjek laki-laki dan perempuan dalam menyelesaikan masalah matematika kontekstual, siswa laki-laki dan perempuan melakukan kesalahan yang sama. Berupa kesalahan memahami yaitu tidak menuliskan apa yang diketahui dan ditanya pada soal, kesalahan transformasi yaitu salah dalam menentukan metode yang tepat dalam menyelesaikan soal, kesalahan keterampilan proses yaitu salah dalam melakukan perhitungan dalam menyelesaikan soal dan kesalahan sebelumnya, dan kesalahan penulisan jawaban akhir yaitu tidak menuliskan kesimpulan jawaban akhir dan menuliskan jawaban akhir tetapi tidak tepat. Faktor-faktor penyebab kesalahan siswa laki-laki dan perempuan dalam menyelesaikan masalah matematika kontekstual juga cenderung sama. Berupa tidak memahami masalah dalam soal, tidak memahami materi, kurang teliti/ceroboh, dan kesalahan tahap sebelumnya. Hanya saja yang membedakan siswa perempuan memenuhi faktor tidak terbiasa menuliskan apa yang diketahui dan ditanya pada soal sedangkan siswa laki-laki tidak tidak memenuhi faktor tersebut.
Kemampuan Koneksi Matematis ditinjau dari Minat Belajar Peserta Didik pada Materi Kubus dan Balok
Authors: Hotipah Putri , Setiani Yani , Fakhrudin Fakhrudin
Published: August 2021

Penelitian ini bertujuan untuk mendeskripsikan kemampuan koneksi matematis ditinjau dari minat belajar peserta didik pada materi kubus dan balok. Jenis penelitian yang digunakan adalah penelitian kualitatif dengan pendekatan deskriptif. Subjek pada penelitian ini adalah 6 orang peserta didik kelas VIII C SMP Negeri 9 Kota Serang yang terdiri dari 2 peserta didik dengan minat belajar tinggi, 2 peserta didik dengan minat belajar sedang, dan 2 peserta didik dengan minat belajar rendah. Teknik pengumpulan data dengan menggunakan angket, tes bentuk uraian, dan wawancara. Instrumen penelitian yang digunakan berupa angket minat belajar, tes kemampuan koneksi matematis, dan pedoman wawancara. Teknik analisis data yang digunakan yaitu reduksi data, penyajian data, dan penarikan kesimpulan. Hasil dari penelitian ini adalah (1) kemampuan koneksi matematis peserta didik yang memiliki minat belajar tinggi telah memenuhi semua indikator kemampuan koneksi matematis, (2) kemampuan koneksi matematis peserta didik yang memiliki minat belajar sedang memenuhi dua indikator kemampuan koneksi matematis, (3) kemampuan koneksi matematis peserta didik yang memiliki minat belajar rendah hanya memenuhi satu indikator kemampuan koneksi matematis.
Analisis Self-Efficacy Siswa dalam Penelitian Pembelajaran Matematika dengan Pendekatan Matematika Realistik dan Inkuiri
Authors: Rajagukguk Waminton , Hazrati Khairina
Published: August 2021

Tujuan dari penelitian ini untuk mengetahui: (1) Untuk menganalisis perbedaan self-efficacy siswa yang diajar melalui melalui pendekatan matematika realistik dengan pendekatan inkuiri. (2) Untuk menganalisis interaksi antara pendekatan pembelajaran (pendekatan matematika realistik dan pendekatan inkuiri) dan Kemampuan Awal (tinggi, sedang dan rendah) terhadap self-efficacy siswa. Subjek dalam penelitian ini adalah self-efficacy antara siswa yang diberi pendekatan matematika realistik dengan pendekatan inkuiri. Dengan metode pengumpulan data studi pustaka. Hasil penelitian ini yaitu: (1) Terdapat perbedaan self-efficacy siswa antara siswa yang diberi pendekatan matematika realistik dengan pendekatan inkuiri. (2) Tidak terdapat interaksi antara pembelajaran dan kemampuan awal matematika terhadap self-efficacy.
Analisis Kesalahan pada Number Sense dan Structure Sense Ditinjau dari Berpikir Logis
Authors: Rulia Siti , Supratman Supratman , Madawistama Sri Tirto
Published: August 2021

Penelitian ini bertujuan untuk menganalisis kesalahan pada number sense dan structure sense ditinjau dari berpikir logis. Metode yang digunakan adalah kualitatif. Pengumpulan data melalui tes berpikir logis, tes number sense, tes structure sense dan wawancara. Pemilihan subyek berdasarkan eksplorasi. Analisis data berupa reduksi data, penyajian data, dan menarik kesimpulan. Hasil penelitian menunjukan peserta didik dengan berpikir logis tahap transisi melakukan kesalahan pada indikator number sense pemahaman pada besaran bilangan dan mampu mengenali efek relatif operasi bilangan dengan jenis kesalahan yaitu kesalahan prinsip dan kesalahan operasi. Peserta didik dengan berpikir logis tahap konkret melakukan kesalahan indikator number sense pemahaman pada besaran bilangan, mampu mengenali efek relatif operasi bilangan dan mampu menggunakan representasi bilangan dengan jenis kesalahan yaitu kesalahan prinsip dan kesalahan operasi. Peserta didik dengan berpikir logis tahap transisi melakukan kesalahan pada indikator structure sense mengidentifikasi struktur yang sudah dikenal dengan cara yang paling sederhana dan indikator menangani ekspresi aljabar kompleks sebagai satu unit dengan jenis kesalahan yaitu kesalahan fakta dan kesalahan konsep. Peserta didik dengan berpikir logis tahap konkret melakukan kesalahan pada indikator structure sense mengidentifikasi struktur yang sudah dikenal dengan cara yang paling sederhana dan tidak menemukan langkah penyelesaian pada indikator menangani ekspresi aljabar kompleks sebagai satu unit.
Motivasi Belajar Matematika Siswa Sekolah Menengah Selama Pembelajaran Daring di Masa Pandemi COVID-19
Authors: Nurfallah Mitha , Pradipta Trisna Roy
Published: August 2021

Motivasi Belajar Matematika Siswa Sekolah Menengah Selama Pembelajaran Daring di Masa Pandemi COVID-19
Analisis Kemampuan Pemahaman Konsep Matematis pada Materi SPLDV Ditinjau dari Gaya Belajar Peserta Didik
Authors: Khoirunnisa Aprilia , Soro Slamet
Published: August 2021

Penelitian ini dilakukan dengan tujuan menganalisis kemampuan pemahaman konsep yang dimiliki peserta didik kelas X MIPA 2 SMAN 5 Jakarta dalam menyelesaikan masalah sistem persamaan linear dua variabel dengan meninjau dari gaya belajar peserta didik, yaitu visual, auditorial, dan kinestetik. Pendekatan kualitatif dengan metode deskriptif digunakan dalam penelitian ini. Subjek yang dipilih sebanyak enam orang yang merupakan dua peserta didik yang mewakili masing-masing gaya belajar. Model Miles dan Huberman digunakan untuk menganalisis data yang diperoleh dalam penelitian ini, yaitu dengan reduksi data, penyajian data, dan penarikan kesimpulan. Hasilnya menunjukkan bahwa peserta didik yang memiliki ketiga gaya belajar VAK mampu memahami konsep SPLDV, namun gaya belajar visual yang paling memenuhi seluruh indikator pemahaman konsep melebihi peserta didik dengan gaya belajar auditorial dan kinestetik yang masih belum mampu membedakan contoh dan bukan contoh dari sebuah konsep.
Analisis Kecemasan Matematika dan Motivasi Belajar Siswa Berdasarkan Keikutsertaan Les Privat pada Pembelajaran Daring
Authors: Ramadhani Winda Nur , Ulfah Syafika
Published: August 2021

Penelitian ini bertujuan untuk mengetahui tingkat kecemasan matematika dan motivasi belajar matematika siswa SMP berdasarkan ketersediaan dukungan les privat di masa pandemi Covid-19. Penelitian ini menggunakan metode penelitian kuantitatif. Teknik yang digunakan adalah teknik survei melalui kuesioner. Kuesioner dibagikan ke seluruh siswa SMP kelas VIII di Jakarta Barat. Kuesioner terdiri dari pernyataan kecemasan matematika dan motivasi belajar matematika dengan menggunakan 5 penilaian skala likert sebagai pilihan jawaban. Diperoleh responden sebanyak 243 siswa yang berpartisipasi dalam penelitian ini. Pengolahan data dalam penelitian ini menggunakan analisis deskriptif, uji mann whitney dan analisis korelasi dengan alat bantu aplikasi Microsoft Excel. Hasil penelitian menunjukkan bahwa kelompok siswa yang mengikuti les privat memiliki tingkat kecemasan yang lebih rendah dibandingkan dengan siswa yang tidak mengikuti les privat namun berbeda dengan motivasi belajar siswa. Kelompok siswa yang tidak mengikuti les privat memiliki motivasi belajar matematika yang tinggi. Uji Mann Whitney menunjukan terdapat perbedaan yang signifikan antara siswa yang tidak mengikuti les privat dengan siswa yang mengikuti les privat. Analisis korelasi menunjukkan bahwa ada hubungan antara kecemasan matematika dan motivasi belajar matematika.
Pengembangan LKS Berbasis Guided Discovery Learning pada Materi Statistika Kelas VIII SMP
Authors: Sabrina Faradila Nur , Rahardi Rustanto
Published: August 2021

Tujuan dari penelitian ini adalah untuk menghasilkan produk berupa LKS berbasis Guided Discovery Learning pada materi Statistika kelas VIII yang valid, praktis, dan efektif. Penelitian Research and Development (R&D) ini menggunakan model pengembangan Plomp. Dalam penelitian pengembangan LKS ini menggunakan teknik analisis data hasil uji validitas, uji kepraktisan, dan uji keefektifan produk. Hasil dari penelitian ini adalah LKS yang dinyatakan valid berdasarkan uji validasi oleh validator dengan hasil 93,75%. Setelah dilakukan uji validasi, LKS diujicobakan kepada subjek penelitian dan dinyatakan praktis berdasarkan hasil angket respon siswa yaitu 82,19% dan angket respon guru yaitu 93,31%. LKS juga dinyatakan efektif berdasarkan hasil tes formatif subjek penelitian yaitu terdapat 80% siswa mendapat nilai di atas KKM.
Efektivitas Model Pembelajaran Problem Solving dan Problem Based Learning (PBL) Ditinjau dari Kemampuan Berpikir Kreatif Matematis Siswa Kelas 5 Sekolah Dasar
Authors: Dewi Wahyu Indra , Harjono Nyoto
Published: August 2021

Tujuan penelitian ini adalah untuk mengetahui efektivitas model pembelajaran Problem Solving (PS) dan Problem Based Learning (PBL) dalam meningkatkan kemampuan berpikir kreatif matematis siswa kelas 5 SD Negeri Bringin 01. Teknik pengumpulan data yaitu dengan obeservasi dan uji tes efektivitas terhadap model PS maupun PBL. Teknik analisis data dilakukan melalui uji normalitas dan uji homogenitas telah memenuhi syarat normal dan homogen, maka bisa dilakukan uji lanju dengan uji t, sedangkan untuk uji efektivitas model dilakukan melalui uji T. Hasil uji T membuktikan bahwa terdapat perbedaan efektivitas antara model PS dengan PBL. Dilihat dari selisih perolehan skor melalui tes yang sama, posttest pada eksperimen 1 perolehan skor PS 59,9 dan PBL 91,2; sedangkan hasil posttest pada eksperimen II rata-rata skor PS 58,8 sementara PBL 92. Bila dilihat dari pencapaian skor, terbukti bahwa PBL lebih efektif karena perolehan skor lebih tinggi dari PS, yakni selisih 32,25. Berdasarkan data ini dapat disimpulkan bahwa terdapat perbedaan kemampuan berpikir kreatif matematis baik dari hasil tes pada kelas eksperimen 1 maupun eksperimen II. Terbukti pula bahwa model PBL lebih efektif dalam meningkatkan kemampuan berpikir kritis matematis dibandingkan dengan model PS.
Implementation of solid waste management policies in Kenya: challenges and opportunities
Authors: Amugsi Dickson , Muindi Kanyiva , Mberu Blessing
Published: August 2021

The study used quality methods to collect the data. The
data collection was conducted both in Nairobi and Mombasa (two main commercial cities), using in-depth interviews (IDIs), key informant interviews (KIIs) and focus group
discussions (FGDs). A total of 10 FGDs (Each FGD
was made up of 8-12 people), 15 IDIs and 15 KIIs were completed with selected
respondents in the two cities. The purposive
sampling strategy was used to select respondents who would be better positioned
to provide rich information on the subject being investigated. The IDIs and
FGDs were conducted with community members and solid waste (SW) workers,
including scavengers. while KIIs were conducted with policymakers, civil
society organisations, international non-governmental organisations,
community-based organisations and national institutions responsible for
environmental issues in Kenya. All interviews were audio-recorded and
transcribed verbatim by professional transcribers, translated into English for
interviews conducted in the local language, and validated by an independent
transcriber. Thematic
analytical approach was employed in the analysis of the data.
Effect of fiber-orientation on stresses at the supporting end of a short cantilever beam of fiber-reinforced composites
Authors: Hossain Md Jamil
Published: August 2021

The effect of fiber orientation on the state of stress, especially around the supporting end of a short cantilever beam of fiber-reinforced composites is investigated. Two limiting cases of fiber orientation are considered for the composite beam. A displacement potential based finite-difference computational scheme is used to obtain the numerical solution of the elastic field of the problem. Analysis of the results shows that the fiber orientation plays an important role in defining the state of stresses, especially around the supporting end of a cantilever beam. The fiber orientation effect is also identified to be influenced by a number of practical issues like, beam aspect-ratio, supporting condition, type of loading and fiber stiffness. Finally, a comparative analysis of the results with the corresponding FEM solution is included to verify the appropriateness as well as accuracy of the present computational study.
Role of Emotion in Child Maltreatment Risk during the COVID-19 Pandemic
Authors: Rodriguez Christina , Lee Shawna J.
Published: August 2021

Purpose: Preliminary research early in the COVID-19 pandemic suggested children appeared to be at increased risk for child maltreatment, particularly as parents struggled with mental health and economic strains. Such strains were likely to influence parental emotions about their children, affecting their parent-child interactions to contribute to elevated maltreatment risk. To identify the potential affective elements that may contribute to such increased maltreatment risk, the current study focused on whether maternal worry about children’s behavior specifically as well as maternal anger were related to increased risk for neglect or physical or psychological aggression six months into the pandemic. Method: The racially diverse sample included 193 mothers who completed an online survey during the COVID-19 pandemic in late September-early October 2020. Results: Mothers’ reported increases in neglect and physical and psychological aggression during the pandemic were significantly related with established measures of maltreatment risk. Furthermore, path models indicated that maternal anger and worry about children’s behavior, as well as their interaction, were significantly related to indicators of physical aggression risk and neglect during the pandemic, but only maternal anger related to increased psychological aggression during the pandemic. Conclusions: Maternal worry and anger about children’s behavior may have exacerbated risk for maltreatment under the stressful conditions of the COVID-19 pandemic. Findings suggest affective reactions of both parental worry and anger focused on child behavior warrants greater empirical attention and consideration in intervention efforts both during the pandemic and potentially post-pandemic.
Implications of the Symptom-Level Overlap Among DSM Diagnoses for Dimensions of Psychopathology
Authors: Forbes Miriam K.
Published: August 2021

Research on the patterns of covariation among mental disorders has proliferated, as summarized in the Hierarchical Taxonomy of Psychopathology (HiTOP). The aim of this brief descriptive study was to examine whether symptom overlap among DSM-5 diagnoses is likely to represent an important source of bias in this research. Specifically, the unique constituent symptoms comprising the diagnostic criteria for all disorders covered by the HiTOP framework were examined for patterns of co-occurrence that systematically mirror the patterns of disorder covariation captured in the dimensions of the HiTOP framework. I found that 358 pairs of the DSM-5 diagnoses covered by the HiTOP framework had one or more overlapping symptoms in their diagnostic criteria, and that a third (n = 130; 34%) of the unique constituent symptoms reinforced the higher-order structure of HiTOP through repetition within dimensions and/or between dimensions in the same superspectrum. By contrast, 86% of the possible pairs of diagnoses did not have any shared symptoms, and the majority of the symptoms (n = 222; 58%) did not influence the structure through repetition. Further, a fifth (n = 71; 19%) of the symptoms worked against the HiTOP structure at the subfactor, spectrum, and superspectrum level. Overall, symptom-level homogeneity likely inflates the similarity and consequent covariation of some DSM-5 diagnoses and research on the statistical structure of psychopathology should account for this potential source of bias. However, the patterns of symptom overlap do not appear strong enough to make the HiTOP structure a foregone conclusion.
تعدد المهام وعلاقته بالانتباه والذاكرة العاملة لدى طلاب جامعة إفريقيا العالمية
Authors: Unshur Ahmed Mohamed Hussein
Published: August 2021

هدفت هذه الدراسة لمعرفة تعدد المهام وعلاقته بالانتباه والذاكرة العاملة لدى طلاب جامعة إفريقيا العالمية،كما هدفت إلى معرفة السمة العامة لتعدد المهام لدى الطلاب، إضافة إلى معرفة الفروق في تعدد المهام تبعاً لمتغيرات النوع، والعمر، والتخصص الدراسي، والقارة (إفريقيا، آسيا). اتبعت الدراسة المنهج الوصفي الارتباطي. بلغ حجم العينة (n = 200) طالباً (142 ذكور، 58 إناث، بين 18 – 44 عاماً، متوسط العمر = 23.8 عاماً) (126 أفارقة، 74 أسيويين) (120 تخصص أدبي، 80 تخصص علمي) وتم اختيارهم عن طريق العينة القصدية والعشوائية الطبقية. تم تصميم واستخدام ثلاث مقاييس لقياس تعدد المهام، والانتباه، والذاكرة العاملة، وتم تحليل البيانات باستخدام الحزمة الإحصائية للعلوم الاجتماعية (SPSS). توصلت الدراسة إلى النتائج التالية: ارتفاع مستوى تعدد المهام لدى الطلاب (d = .63 , p < .0001). وجود علاقة ارتباطية طردية بين تعدد المهام والانتباه (p < .01). وجود علاقة ارتباطية طردية بين تعدد المهام والذاكرة العاملة (p < .01). كشفت الدراسة وجود فروق دالة احصائياً وذات حجم أثر دال (η2 = .019 , p = .05) في مستوى تعدد المهام لدى الطلاب تبعاً لمتغير النوع. أسفرت الدراسة عدم وجود فروق دالة احصائياً في مستوى تعدد المهام لدى الطلاب تبعاً لمتغيرات العمر، والتخصص الدراسي، والقارة. قدمت الدراسة بعض التوصيات وعدد من المقترحات لبحوث مستقبلية.
Thoracic Aortic Aneurysm Presenting as Vocal Cord Paralysis
Authors: Salleh Dr Norly
Published: August 2021

We present a case of 80-year-old man with two-year history of hoarseness of voice secondary to left vocal cord paralysis. CT scanning revealed a saccular thoracic aneurysm compressing the left recurrent laryngeal nerve. A review of literature on Ortner's or cardiovocal syndrome is presented
Analisis Fraksi Volume Bahan Bakar Uranium Karbida Pada Reaktor Cepat Berpendingin Gas Menggunakan SRAC Code
Authors: Ratna Dewi Syarifah  , Nabil Nabhan MH  , Zein Hanifah  , Iklimatul Karomah  , Ahmad Muzaki Mabruri
Published: August 2021

Analysis of fuel volume fraction with uranium caride fuel in Gas Cooled Fast Reactor (GFR) with SRAC Code is has been done. The calculation used SRAC Code (Standard Reactor Analysis Code) which is developed by JAEA (Japan Atomic Energy Agency), and the data libraries nuclear used JENDL 4.0. There are two calculation has been used, fuel pin cell calculation (PIJ Calculation) and core calculation (CITATION Calculation). In core calculation, the leakage is calculated so the calculation more precise. The CITATION calculation use two type of core configuration, i.e. homogeneous core configuration and heterogeneous core configuration. The power density value of two type core configuration is quite difference. It is better use heterogeneous core configuration than homogeneous core configuration, because the power density of heterogeneous core configuration is flatter than the other. From the analysis of fuel volume fraction, when the volume fraction is increase, the k-eff value is increase. And the optimum design after has been analysis for fuel volume fraction, that is the fuel volume fraction is 49% with a heterogeneous core configuration of three types of fuel percentages, for Fuel1 9%, Fuel2 12% and Fuel3 15%. This reactor is cylindrical, has a core diameter of 240 cm and a core height of 100 cm.
PENYULUHAN KESEHATAN DAN KESELAMATAN PADA MASA PANDEMI COVID-19 DI DESA SRIMAHI KECAMATAN TAMBUN UTARA KABUPATEN BEKASI
Authors: Vendhi Prasmoro Alloysius , Nuryono Arif
Published: August 2021

Dalam upaya gotong-royong menangani wabah Covid-19 di Indonesia, berbagai pihak bersatu untuk mencegah dan mengatasi wabah Covid-19. Berbagai kerja sama dilakukan salah satunya dari pihak kampus dan pihak masyarakat. Program penangangan wabah Covid-19 ini diharapkan dapat memberikan edukasi dan meningkatkan kesadaran akan pentingnya perubahan perilaku Adaptasi Kebiasaan Baru untuk masyarakat

Penataan lingkungan di Desa Srimahi ini sudah cukup tertata rapi, namun masih terlihat adanya sampah di pinggir jalan serta lahan kosong. Tingkat penerapan hidup dalam normal baru ini dianggap kurang karena banyak warga yang tidak menggunakan masker dan tidak memenuhi protokol kesehatan di masa pandemi COVID-19 saat ini.

Melihat profil Desa Srimahi seperti di atas, maka dapat disusun program kerja yang merujuk pada kebersihan lingkungan dan kesehatan masyarakat sekitar sebagai salah satu upaya pencegahan terdampak wabah COVID-19 di wilayah ini. Berdasarkan hal tersebut kami dari Dosen dan Mahasiswa Program Studi Teknik Industri Fakultas Teknik Universitas Bhayangkara Jakarta Raya, memiliki Program Penyuluhan Kesehatan dan Keselamatan pada Masa Pandemi Covid-19 Di Desa Srimahi Kecamatan Tambun Utara Kabupaten Bekasi.
WORKSHOP DESAIN PEMASARAN DIGITAL MELALUI APLIKASI CANVA DAN MOBILE PHOTOGRAPHYKEPADA PELAKU UMKM FOOD AND BEVERAGE DI TIBAN CENTER BATAM
Authors: Husna Assaidatul , Nalendra Muhammad Adi Sukma , Nabilah
Published: August 2021

Perkembangan Usaha Mikro Kecil dan Menengah (UMKM) di Kota Batam mencapai 81.486 UMKM. Strategi pemasaran sangatlah penting bagi UMKM. Dari sekian banyak UMKM yang ada di Kota Batam, tidak seluruhnya melakukan program pemasaran yang maksimal terutama dalam masa pandemi Covid-19 saat ini. Banyak UMKM yang belum mengetahui tentang pentingnya strategi kampanye dan estetika dalam mengkomunikasikan produknya. Untuk mendorong kemandirian UMKM dalam menjalankan fungsi promosi, diperlukan pencerdasan penggunaan media praktis seperti template dan teknis perancangan komunikasi berbasis visual.Media praktis yang digunakan adalah media Canva dan mobile photography.Pengabdian masyarakat dalam bidang UMKM menjadi sangat relevan dan penting dilakukan terutama dimasa pandemi saat ini demi mewujudkan UMKM yang kuat dan mandiri serta berkualitas
Edukasi Pencegahan Covid-19 dan Pendampingan Keterampilan Berbahasa Inggris bagi Orang Tua Anak di Kelurahan Harapan Mulya Kecamatan Medan Satria Kota Bekasi
Authors: Hamdani Haris , Sabilah Ade Irpan
Published: August 2021

The public is shocked by the positive cases of Covid-19. Several sectors have been paralyzed by the Covid-19 pandemic, including the health and education sectors. Covid- 19 causes people to be affected by their health and even death. Covid-19 is an infectious disease through the eyes, nose and mouth. This also has a very negative impact on the education sector. Since the beginning of the Covid-19 pandemic, schools from elementary to tertiary levels have not been allowed to carry out learning at schools or campuses. Students learn from their homes. Learning is also considered less than optimal because of the lack of direct guidance from educators. The government and the community work together to overcome problems during the Covid-19 pandemic. In the health sector, various activities were held to prevent the transmission of Covid-19, including socialization about preventing the transmission of Covid-19 and healthy behavior. Meanwhile, in the field of education, socialization of the use of technology was held, namely by using various learning applications from mobile phones. One application to learn English on mobile phones is Cake. Many residents of RW 007, Harapan Mulya Village, Medan Satria Sub-district, Bekasi City are positively contaminated with Covid-19. Residents who have children also do not understand how to use the features on their cell phones to learn English. The socialization of the prevention of Covid-19 transmission and assistance in English language skills for parents of children can be a solution to break the chain of the spread of Covid-19 and assist children in learning English at home. The Cake application provides English learning materials and exercises with interesting features. Children can use the application at any time accompanied by their parents. Problems in the health and education sectors during the Covid-19 pandemic will be reduced.