bluuebunny/crossref_metadata_2025 huggingface dataset:
ЛЮМИНЕСЦЕНЦИЯ КВАРЦ-ХАЛЦЕДОНОВЫХ ОБРАЗОВАНИЙ КУЗБАССА И ЕЁ СВЯЗЬ С ГЕОХИМИЧЕСКИМИ ОСОБЕННОСТЯМИ АГАТОВОЙ МИНЕРАЛИЗАЦИИ
Authors: Борозновская Нина Николаевна , Звягинцева Елизавета Владимировна , Корнева Александра Павловна , Небера Татьяна Степановна
Published: September 2020

Актуальность. Кварц-халцедоновые образования Кузбасса являются потенциально ювелирно-поделочным материалом, при этом степень их минералогической изученности недостаточна. Кроме того, требуют дальнейшего изучения некоторые аспекты формирования агатов. Цель: изучение люминесцентных характеристик кварц-халцедоновых образований в пределах проявлений Южно-Кузбасского магматического ареала, их изменений по зонам в исследуемых образцах, вариаций в поведении отдельных центров свечения, связанных с собственными и примесными дефектами, выяснение возможного влияния геохимических особенностей исследуемых минералов на их люминесцентные свойства. Объекты: кварц-халцедоновые образования с проявлений Южно-Кузбасского магматического ареала (проявление россыпного типа у д. Ключи (Крапивинский район), миндалекаменные базальты с агатовой минерализацией проявления участка Терсюк (Новокузнецкий район), миндалекаменные базальты с агатовой минерализацией проявлений Салтымаковского хребта (Крапивинский район, Кемеровская область). Методы: рентгеноструктурный анализ, рентгенолюминесцентный анализ, масс-спектрометрия с индуктивно связанной плазмой. Результаты. Методом рентгеноструктурного анализа изучен минеральный состав. Главным образом представлены кварц и халцедон, при этом наибольшее содержание халцедона наблюдается в миндалинах с концентрически-зональным строением. В числе других минералов встречаются кристобалит, доломит, кальцит, цеолиты. Посредством проведения рентгенолюминесцентного анализа получены данные о содержании собственных и примесных дефектов различной природы. Распределение центров люминесценции в слоях агата проявления Терсюк может свидетельствовать о смене окислительного потенциала (во внешней зоне) на восстановительный (во внутренних зонах), что подтверждается геохимическими данными. Для оникса Салтымаковского хребта характерна идентичность спектров РЛ для всех исследуемых слоев, что свидетельствует о постоянстве условий минералообразования. В целом сделан вывод о преобладании в миндалинах участка Терсюк восстановительной среды, а в миндалинах проявлений Салтымаковского хребта и у д. Ключи – окислительной.
ОБОСНОВАНИЕ ТЕХНОЛОГИЧЕСКИХ ПАРАМЕТРОВ ТЕРМОМЕТРИЧЕСКОГО КОНТРОЛЯ СОСТОЯНИЯ ЛЕДОПОРОДНОГО ОГРАЖДЕНИЯ
Authors: Семин Михаил Александрович , Зайцев Артем Вячеславович , Паршаков Олег Сергеевич , Желнин Максим Сергеевич
Published: September 2020

Актуальность исследования обусловлена отсутствием в нормативных документах, регламентирующих выполнение контроля за породным массивом в условиях его искусственного замораживания, единых требований к организации и осуществлению контроля за формированием и состоянием ледопородного ограждения. Цель работы заключается в обосновании оптимальных технологических параметров термометрического контроля ледопородных ограждений строящихся шахтных стволов. Объектами исследования в настоящей работе являются замораживаемый породный массив и система искусственного замораживания. Методы: экспериментальные исследования динамики температуры замораживаемых горных пород, статистическая обработка и анализ экспериментальных данных; математическое моделирование термодинамических процессов, происходящих в условиях искусственного замораживания породного массива. Результаты. Приведены результаты обработки экспериментальных измерений температуры горных пород в контрольно-термических скважинах строящихся шахтных стволов способом искусственного замораживания. На основании обработки и анализа экспериментальных данных установлена закономерность влияния процесса искусственного замораживания на локальные участки породного массива. Проведено исследование влияния расположения контрольно-термической скважины на точность решения обратной задачи Стефана, позволяющей производить корректировку теплофизических свойств породного массива и рассчитывать температурное поле во всем объеме участка замораживаемого массива горных пород. Определено, что термометрическую скважину следует размещать в замковой плоскости ледопородного ограждения в точке с наименьшей температурой. На основе анализа аварийного выхода из строя замораживающих колонок найдено требуемое количество контрольно-термических скважин, которое позволяет обеспечить всесторонний контроль за состоянием ледопородного ограждения. При осуществлении термометрического контроля для установления достоверных параметров ледопородного ограждения и выполнения дальнейшего адекватного моделирования термодинамических процессов, происходящих в замораживаемом породном массиве, выполнено обоснование оптимального расположения и количества контрольно-термических скважин с необходимым пространственным разрешением измерений температуры горных пород по их глубине. По результатам проведенной работы разработана методика выбора технологических параметров способа термометрического контроля ледопородных ограждений шахтных стволов.
Medical education personalized system development and implementation results at Volgograd state medical university
Authors: Vorobyov A. A. , Litvina E. V. , Mashlykin A. A.
Published: September 2020

Personalization of the educational process in a medical university is one of the necessary conditions for the professional medical personnel successful training. The article presents 7 years of experience in the discipline «Manual Skills and Clinical Anatomy Course» teaching at the Department of Operative Surgery and Topographic Anatomy of the Volgograd State Medical University and 10 years of experience at the students’ Surgery Club of the Volgograd State Medical University, which applied a personalized education system for future surgeons. The expediency of the discipline «Manual Skills and Clinical Anatomy» at a medical university, as part of a personalized medical education, has been proved. Currently, this discipline has been introduced in 27 medical universities of Russia. The results of the Surgical Club of Volgograd State Medical University, as a prototype of an innovative student medical professional community, demonstrated the successful results of the proposed system of personalized medical education at the stage of education at a university, postgraduate education and in the professional work of a surgeon.
HUBUNGAN VENTILASI DENGAN KEJADIAN PENYAKIT ISPA PADA SANTRI DI PONDOK PESANTREN AMANATUL UMMAH SURABAYA
Authors: Istifaiyah Amanatul , Adriansyah Agus Aan , Handayani Dwi
Published: September 2020

The incidence of Acute Respiratory Infections (ISPA) at the Amanatul Ummah Surabaya Islamic Boarding School is the biggest disease experienced by santri. This study aims to analyze the relationship between ventilation with the incidence of ISPA in students at the Amanatul Ummah Surabaya Islamic Boarding School. Cross sectional and Stratified Random Sampling consist of of 91 male and 116 female students were used in this study.data was obtained through extensive ventilation field observations. Secondary data was obtained from the medical record books of the students to obtain information on the history of the incidence of ISPA experienced by respondents over the past 1 year. The data analysis by chi-square test (α=0.05). The results showed that most (73.9%) respondents had ventilation conditions that did not meet the requirements and most (54.1%) sufferred from ISPA. The results showed a significant correlation between the ventilation condition and the incidence of ISPA (p=0.001). The more ventilation does not meet the requirements, the more likely the respondents were to suffer from ISPA. It was recommended that the islamic boarding schools evaluate the construction of the islamic boarding schools, especially related to the ventilation hole area of the students rooms to fit the applicable health requirements.
Deskripsi Pelayanan Kesehatan (Instalasi Farmasi) di RSUD Prof. dr. H. Aloei Saboe Kota Gorontalo
Authors: Sutriono Dede , Sudirman Sudirman
Published: September 2020

Peningakatan sistem kualitas layanan di rumah sakit tentunya akan dapat menciptakan serta memberikan kepuasan terhadap pelanggan. Pengukuran terhadap kualitas pelayanan menjadi sangat penting khususnya dalam meningkatkan kualitas pelayanan dengan tujuan bahwa penyedia mendapatkan pelanggan yang setia. Oleh karena itu, tujuan dari penelitian ini adalah untuk mendeskripsikan kualitas pelayanan di Instalasi Farmasi RSUD Prof. Dr. H. Aloei Saboe Kota Gorontalo. Penelitian ini berjenis deskriptif kualitatif dengan pendekatan studi kasus pada Bulan September-Oktober 2019 di Instalasi Farmasi. Informan penelitian ini berjumlah 5 orang tenaga kesehatan yang berada dan tercatat sebagai pegawai farmasi RSUD Prof. Dr. H. Aloei Saboe, dan 5 orang pasien yang dipilih berdasarkan teknik accidental sampling. Analisis data menggunakan analisis ISI, kemudian menampilkannya dalam bentuk teks naratif. Hasil penelitian menunjukkan bahwa: (1) Kualitas pelayanan kesehatan di Instalasi Farmasi RSUD Prof Dr. H. Aloei Saboe Kota Gorontalo pada dimensi tangible dan empathy menunjukkan hasil yang kurang memuaskan dimana minimnya sarana prasaran serta pemanfaatannya yang belum maksimal. Dimensi reliability, responsiveness dan assurance kualitas pelayanan yang diberikan kepada pasien/keluarga pasien sudah sesuai dengan standar dan harapan pelanggan dan dikategorikan baik. (2) Faktor sarana prasarana penunjang di ruang tunggu instalasi masih sangat minim, serta ruangan yang masih kurang representatif, selain itu juga SDM yang bertugas di Instalasi Farmasi yang belum sesuai kualifikasi sehingga kepuasan pasien/keluarga pasien tidak terpenuhi. Dapat di simpulkan bahwa Instalasi Farmasi masih dipandang kurang oleh customer sehingga perlu untuk meningkatkan kualitas pelayanan pada dimensi tangible dan empathy.
Modern model of physical education teacher's professional activity
Authors: SYSOEV Aleksandr N.
Published: September 2020

Introduction. In this article we analyzed the current characteristics of the professional activity of physical education teachers. We considered the main components of vocational training of specialists in physical education. Purposes and tasks. The main purpose of the study was to develop a model of professional activity of a physical culture teacher based on the identification of the most important qualities. Materials and methods. Questionnaire survey and correlation analysis. Main results. Based on the data of the questionnaire survey, we identified the main most important components that lead to the success of the professional activity of the physical education teacher. We determined the expression of professionally important qualities depending on the length of pedagogical activity of teachers. There is a mismatch between the level of importance and the degree of expression of professionally important qualities in respondents surveyed. Conclusion. The obtained data can be useful for improving the educational process in faculties of physical culture.
Evaluation of hip joint mobility among female students of higher education institutions
Authors: PLATONOVA Yana V. , YAKOVLEV Valery N. , SAYKIN Sergey V.
Published: September 2020

In this article we presented the results of the study of hip joint mobility among 1-4 year students of Derzhavin Tambov State University engaged in health aerobics and its various types. The level of development of mobility in female students' hip joints to a large extent determines the effectiveness of training in the equipment of elements in classes of health aerobics, containing a significant number of movements performed by lower limbs (grazing, wavy, squat, etc.). Hip joint refers to spherical joints and therefore allows: bending and unbending; assignment and reduction; pronation and supination; roundabout. In everyday life, the maximum degree of motor load on the hip joint occurs during walking. However, the amplitude of hip movements used in walking does not reach a potential value, and the execution of circular and lateral movements is minimized. This circumstance at classes of health aerobics with female students is clearly demonstrated by the constriction of movements and lack of proper amplitude when performing motor actions with lower limbs. The mobility of female students' hip joint was assessed by the test «Cross split». The average group values obtained by the «Cross split» test served as the basis for the development of a scale for assessing the level of mobility in hip joints.
A Praxiologia Motriz e suas contribuições ao debate científico da Educação Física
Authors: Bortoleto Marco Antonio Coelho , Ribas João Francisco Magno , Saraví Jorge Ricardo
Published: September 2020

Apresentamos o Dossiê “Praxiologia Motriz - contribuições para a Educação Física”, publicado pela revista Conexões: Educação Física, Esporte e Saúde no volume 19 (2020). A Praxiologia Motriz - definida por Pierre Parlebas como ciência da ação motriz -, atualmente fundamenta múltiplas investigações científicas e realiza valiosas contribuições ao campo da Educação Física. Com base nesse marco teórico, há mais de uma década, diferentes produções de qualidade, vêm ampliando as colaborações e renovando o interesse dos estudiosos. Este número temático é a expressão e o reflexo de distintos olhares e enfoques dos estudos científicos da área. Depois de uma breve revisão histórica, na qual são considerados alguns fatos relevantes, se apresentam os vinte e três artigos do Dossiê, produto do trabalho de quarenta e cinco autores/coautores que representam sete países diferentes. Por razão desta apresentação, se agrupou os textos em três grandes eixos: artigos que se dedicam a analisar aspectos conceituais e sua articulação com o campo da Educação Física; outros que abordam o debate e a sistematização do trabalho pedagógico e da didática; e por último, textos que tratam do estudo da lógica interna das práticas corporais. O conjunto de artigos registrados neste dossiê representa um vivo testemunho da amplitude e da diversidade das produções científicas da Praxiologia Motriz. Este panorama permite identificar alguns dos desafios futuros para sua consolidação na região e possíveis contributos ao debate científico e ao diálogo com a Educação Física.
The Overview of Mental Workload of Health Safety and Environment Workers in Oil and Gas Industry
Authors: Fajrin Vica Claudia
Published: September 2020

Introduction: PT. Pertamina RU IV Cilacap is a national oil and gas industry that has the largest refinery in Southeast Asia that manages raw materials for other refinery units in Indonesia to be reprocessed into fuel. The size of the refinery can illustrate the complexity of the system run by this unit. The HSE Unit in this company has a great responsibility to maintain the worker safety in the refinery. It is necessary to measure mental workload on HSE workers. This is because if the mental workload is not monitored, it can cause fatality, in this case, work accidents as a result of lack of supervision from HSE workers and mental PAK related to HSE workers resulting in excessive mental workload or property loss as an outcome of excessive mental workload. So, it is important to portray the HSE mental workload because of its responsibility to secure the health, safety and environmental issues. The purpose of this study was to describe the heavy mental workload on PT. Pertamina RU IV Cilacap. Method: This research was a quantitative descriptive designed study. Data were obtained by conducting interviews and using the NASA-tlx questionnaire on 71 respondents. Results: As many as 35 respondents had heavy mental workloads and 31 respondents had very heavy mental workloads. Conclusion: HSE workers at PT. Pertamina RU IV Cilacap has a heavy mental workload and even tends to be very heavy.Keywords: mental workload, NASA-tlx, oil and gas industry
A (nova) dimensão processual da autonomia pessoal
Authors: Neto Luísa
Published: September 2020

São discutidas as implicações das novas aplicações (neuro)científicas e as novas questões colocadas às relações entre a autonomia e a garantia dos direitos fundamentais em contexto processual, que se pretendem equacionar no contexto de um Estado de Direito Democrático. Assim, com suporte em revisão bibliográfica e em pesquisa científica interdisciplinar, avança-se para a discussão da aplicação dos conceitos e princípios jurídicos tradicionais à emergência de novas questões científicas que no plano processual reclamam solução teórico-prática.
Development of Field Guide Book Identification of Anuran Species in Lambung Mangkurat KHDTK: The Result of Expert Review
Authors: Zainudin Zainudin , Arifin Yudi Firmanul , Winarti Atiek
Published: September 2020

The forest areas with special-purpose (KHDTK) Lambung Mangkurat University is an important learning resource for many people, especially students. One of the biodiversity in the area that can be utilized is the diversity of Anura. For identified Anuran species, we need the field guide book according to complete with areas character, Anuran list, and supported by the content that is simple and easy to understand. Therefore the field guide book was developed in such a way using the development model by Tessmer. The result of an expert review shows that this field guide book has been very valid (88%) with criteria that can be used without revision. Attractive design, complex content, with simple language make this field guide not only can be used for students but also by the general people.AbstrakKawasan Hutan Dengan Tujuan Khusus (KHDTK) Universitas Lambung Mangkurat merupakan sumber belajar penting bagi banyak pihak, terlebih mahasiswa. Salah satu keanekaragaman hayati di kawasan tersebut yang dapat dimanfaatkan adalah keanekaragaman Anura. Untuk melakukan identifikasi jenis diperlukan buku panduan identifikasi yang sesuai dengan karakter wilayah dan keanekaragaman anura di dalamnya serta ditunjang dengan komponen isi yang sifatnya sederhana dan mudah untuk dimengerti. Oleh karenanya, buku panduan lapangan identifikasi jenis anura ini dikembangkan sedemikian rupa menggunakan model pengembangan oleh Tessmer. Hasil penilaian ahli menunjukkan bahwa buku panduan lapangan ini memiliki kriteria sangat valid (88%) dan dapat digunakan tanpa revisi. Desain menarik, isi yang kompleks, dengan bahasa yang sederhana membuat buku panduan lapangan ini tidak hanya dapat digunakan untuk kalangan pelajar saja namun juga oleh masyarakat umum.
The Cooperative Learning Model with STAD Type to Improve Science Learning Outcomes of Class IV Elementary School Students
Authors: Pardiyana Pardiyana
Published: September 2020

The results of science learning on the concept of natural resources achieved by the fourth-grade students of Tarungin 2 Elementary School Students have not been optimal with the average score of students is below 65, the average score obtained by students is only 59.5. That is because the lecture method still dominates the learning process. Classroom action research aims to increase teacher activity, student activity, and science learning outcomes of fourth-grade elementary school students with the STAD type cooperative learning model. This research was conduct in two cycles, for three months (January-March 2020). The research subjects were 16 students, eight males, and eight females. Retrievals of data using observation techniques, tests, and questionnaires. The data analysis technique has been carrying descriptively. The results showed that the use of the STAD type cooperative learning model had increased teacher activity in managing learning, student activities during the learning process, and student learning outcomes.AbstrakHasil pembelajaran IPA pada konsep sumber daya alam yang dicapai siswa kelas IV SDN Tarungin 2 selama ini belum maksimal, rata-rata nilai siswa di bawah 65, nilai yang diperoleh siswa rata-rata hanya mencapai 59,5. Hal ini disebabkan metode ceramah masih mendominasi proses pembelajaran. Penelitian tindakan kelas bertujuan meningkatkan aktivitas guru, aktivitas siswa, dan hasil belajar IPA siswa kelas IV sekolah dasar dengan model pembelajaran kooperatif tipe STAD. Penelitian dilaksanakan dua siklus, selama tiga bulan (Januari-Maret 2020). Subjek penelitian sebanyak 16 orang siswa, delapan orang laki-laki dan delapan orang perempuan. Pengambilan data dengan teknik observasi, tes, dan angket. Teknik analisis data dilakukan secara deskriptif. Hasil penelitian menunjukkan penggunaan model pembelajaran kooperatif tipe STAD telah meningkatkan aktivitas guru dalam mengelola pembelajaran, aktivitas siswa selama proses pembelajaran, dan hasil belajar siswa.
PENGARUH MEDIA PENDINGIN DAN WAKTU TUNGGU TERHADAP POROSITAS, KEKERASAN DAN STRUKTUR MIKRO MATERIAL AL PADUAN (RONGSOKAN) MENGGUNAKAN METODE PENGECORAN EVAPORATIVE
Authors: Kresna Kepakisan Komang Aria , Siswanto Rudi
Published: September 2020

The purpose of this research is to know the effect of cooling media and holding time to porosity, hardness and micro structure of Al alloy material (scrap) using evaporative casting method. The method used in this research is the experimental method of smelting Al Alloy piston scrap and poured at 700°C in Styrofoam pattern mold with 10 and 15 minutes holding time, then cooled with medium air, brine, and water of PDAM for 30 minutes. The material used is excavator aluminum alloy (scrap) izumi piston with silicon aluminum alloy (Al-12% Si). The highest hardness value obtained from the results of cooling casting with the brine cooling medium for 10 minutes that is equal to 217,996 kg / mm2 average HV. At porosity, the highest value was obtained at holding time of 15 minutes with PDAM water cooling medium 5.088% against raw material. While the result of visual observation with 50x magnification of microstructure of specimen to raw material, Si material in raw material has significant length increase. The conclusion of the research results is that re-casting with variations of cooling medium and waiting time will increase hardness and increase porosity, except on brine cooling medium. Keywords: MTTR, MTTF, RCM (Reliability Centered Maintanance)
PERANCANGAN ULANG TATA LETAK FASILITAS DALAM MENINGKATKAN EFEKTIVITAS PRODUKSI (STUDI OBSERVASI PT. KALIMANTAN CONCRETE ENGGINERRING)
Authors: Fauzy Rakhmat , Sholihah Qomariyatus
Published: September 2020

Industry is an economic activity that processes raw materials, raw materials, semi-finished goods or finished goods into high-quality goods in use, including engineering and engineering activities. Thus, industry is part of the production process. Industrial materials are taken directly or indirectly, then processed, resulting in more valuable goods for the community. In an industry not only concerns how much investment should be invested, production procedures and marketing of products but also requires the planning of facilities that include the location planning facility and facility design. Facility design includes facility system design, factory layout and material handling system (material transfer). (Wikipedia Bahasa Indonesia). In its current development PT. Kalimantan Concrete Engineering extends production land by purchasing a plot of land adjacent to the current production site, but it has not been enabled yet, in addition to the placement of U-dith and Box Culvert production which have not been placed in accordance with its area in the current name still in place at road front office and other areas that are still far apart. In accordance with the above explanation, we can know that the importance of an effective and efficient facility layout planning where it is in need in material handling arrangements, time efficiency, and the flow of work mobility. So this research is expected to be able to provide trobosan in the relationship layout facilities and improve the effectiveness of work better. Keywords: PT. Kalimantan Concrete Engineering, ARC, MHPS, Efektivitas
ANALISIS PERPINDAHAN PANAS PADA EKONOMISER DI PLTU PULANG PISAU
Authors: Setiawan Syahrul Fajar , Mursadin Aqli
Published: September 2020

Ekonomiser adalah alat yang digunakan untuk memanaskan air umpan sebelum memasuki boiler dengan memanfaatkan panas dari gas pembakaran di boiler. Dengan meningkatnya suhu air pengisi boiler, juga diharapkan meningkatkan efisiensi boiler. Dalam penelitian ini, pengumpulan data dilakukan di ruang kontrol dan data yang diambil, yaitu Tc.i (suhu economizer air yang masuk), Tc.o (suhu air keluar dari economizer), Th.i (suhu gas buang sebelum memasuki economizer) dan Th.o (suhu gas asap keluar dari economizer). Koefisien perpindahan panas tertinggi 4260.492 Btu / h.ft2. ° F dan koefisien perpindahan panas terendah 4251.243 Btu / h.ft2. ° F. Efisiensi tertinggi 87,43% dan terendah 80,76%. Economizer is a tool used to heat feed water before entering boiler by utilizing heat from the combustion gas in the boiler. With the increasing temperature of boiler filler water, it is also expected to increase boiler efficiency. In this study, data collection was carried out in the control room and the data that was taken, Tc.i (the temperature of the incoming water economizer), Tc.o (the exit water temperature of the economizer), Th.i (flue gas temperature before entering economizer) and Th.o (flue gas temperature exit the economizer). High heat transfer coefficient 4260,492 Btu/h.ft2.°F and low heat transfer coefficient 4251,243 Btu/h.ft2.°F. Highest the efficiency 87,43 % and the lowest 80,76 %.
ANALISA EFEKTIVITAS HEAT TRANSFER SAH PLTU DENGAN METODE ASME 4.0 dan 4.3
Authors: Zaki M. Faza Ghani , Ghofur Abdul
Published: September 2020

Pemanas udara adalah salah satu peralatan tambahan yang sangat penting dalam penggunaan perpindahan panas dalam boiler, di mana peralatan ini berfungsi untuk memanaskan udara untuk pembakaran dengan menggunakan panas dari sisa gas panas dari pembakaran sebelum dikirim ke cerobong asap. Untuk menjaga kinerja pemanas udara, maka analisis efektivitas perpindahan panas pada pemanas udara dilakukan dengan uji kinerja menggunakan metode ASME PTC 4.0 dan ASME PTC 4.3. Pada data commissioning, SAH unit 1 memiliki efisiensi sebesar 58,69%. Namun, dari hasil analisis penelitian perpindahan panas di Secondary Air Heater unit 1 pada 2 Maret 2018, efisiensi dihitung sebesar 38,96%, terjadi penurunan sebesar 19,73%, hal ini disebabkan oleh slagging on permukaan elemen dalam SAH dan kebocoran pada pipa SAH. selanjutnya, perbaikan dilakukan dengan melakukan jelaga dan melakukan pengelasan pada pipa bocor menggunakan teknik pengelasan TIG (Tungsten Inert Gas). Setelah itu analisis dilakukan dengan tes kinerja yang diadakan pada 21 Maret 2018 dan mendapat peningkatan 11,34% menjadi 50,3%. Air heaters are one of the auxiliary equipment that are very important in the use of heat transfer in a boiler, where this equipment serves to heat the air for the combustion by using heat from the residual hot gas from the combustion before sending it to the chimney. To maintain the performance of air heater, then the analysis of the effectiveness of heat transfer on air heater is carried out with a performance test using the ASME PTC 4.0 and ASME PTC 4.3 methods. On commissioning data, SAH unit 1 has an efficiency in amount of 58.69%. However, from the result of a research analysis of heat transfer in Secondary Air Heater unit 1 on March 2 2018, the efficiency was counted in amount of 38.96%, there has been a decrease of 19,73%, this was caused by slagging on the surface of the element in SAH and leakage on SAH pipes. subsequently, repairs are carried out by doing soot blowing and perform welding on the leaking pipe using the TIG (Tungsten Inert Gas) welding technique. Afterwards the analysis is carried out with a performance test was held on March 21, 2018 and got an increase of 11.34% to 50.3%.
PENGARUH VARIASI HOLDING TIME DAN MEDIA PENDINGIN TERHADAP KEKERASAN DAN STRUKTUR MIKRO BAJA SUS 630 METODE HARDENING
Authors: Herizen Dwi , Siswanto Rudi
Published: September 2020

SUS 630 memiliki kekerasan 30,9 HRC dan kandungan Chromium 12% berdasarkan pemakaiannya di PT. Pupuk Kalimantan Timur merekomendasikan kekerasan sebesar 55 HRC, untuk meningkatkan kekerasan material dapat dilakukan dengan teknik material engineering yaitu Hardening. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi waktu tahan dan media pendingin terhadap kekerasan dan mikrostruktur baja sus 630. Proses pengerasan dilakukan hingga mencapai suhu 1020 0C kemudian waktu tahan dengan variasi 10, 20, 30, 40, dan 50 menit kemudian dicelupkan ke dalam air, air garam, dan minyak sampai suhu kamar. Struktur mikro diuji menggunakan mikroskop optik dengan perbesaran 400x dan kekerasan menggunakan kekerasan Rockwell C dengan beban 150 kg. Pengamatan struktur mikro setelah pengerasan struktur yang terbentuk adalah bilah martenstie, sisa austenit, dan karbida logam. Hasil uji kekerasan tertinggi pada media pendingin air (34,2 HRC), air asin (34,2 HRC), dan minyak (34,1 HRC) dan bahan baku (30,9 HRC). Dari penelitian ini dapat disimpulkan bahwa proses pengerasan dapat meningkatkan nilai kekerasan. SUS 630 Steel hardness is 30.9 HRC and Chromium content is 12%, based on its use at PT. Pupuk Kalimantan Timur recommended a hardness of 55 HRC, to increase material hardness can be done by means of material engineering, namely Hardening. The aim of the study was to determine the effect of variations in holding time and cooling media on the hardness and microstructure of steel sus 630. The hardening process was carried out to reach 1020 0C then holding time with variations of 10, 20, 30, 40, and 50 minutes then dipped into water , salt water, and oil to room temperature. Microstructure was tested using an optical microscope with 400x magnification and hardness using Rockwell C hardness with a load of 150 kg. The observation of the microstructure after hardening of the structure formed is the martenstie lath, residual austenite, and metal carbide. The hardness test results were highest in water cooling media (34.2 HRC), salt water (34.2 HRC), and oil (34.1 HRC) and raw material (30.9 HRC). From this study it can be concluded that the hardening process can increase the value of violence.
PENENTUAN PARAMETER PROSES PEMBUBUTAN TERHADAP KEKASARAN PERMUKAAN MATERIAL ST 42 DENGAN METODE TAGUCHI
Authors: Mansyursyah Ismail , Tamjidillah Mastiadi
Published: September 2020

Penelitian ini bertujuan untuk mengetahui parameter apa saja yang berpengaruh terhadap kekasaran permukaan pada proses permesinan bubut konvensional dengan material ST 42 dan mengetahui parameter apa saja yang menghasilkan kekasaran permukaan yang baik dengan menggunakan metode Taguchi. Berdasarkan dari penelitian yang telah dilakukan maka diketahui tidak ada parameter yang berpengaruh terhadap kekasaran permukaan material baja ST 42. Parameter yang menghasilkan kekasaran permukaan material baja ST 42 yang paling baik adalah jenis mata pahat JCK dengan feeding 0,115 dan kehalusan 3,42 µm. This study aims to determine which parameters affect the surface roughness of the conventional lathe machining process with ST 42 material and to find out which parameters produce good surface roughness using the Taguchi method. Based on the research that has been done, it is known that there are no parameters that affect the surface roughness of the ST 42 steel material. The parameter that produces the best surface roughness of ST 42 steel material is the type of JCK tool blade with a feeding of 0.115 and a smoothness of 3.42 µm.
Sistema de recomendación turístico mediante aplicación de minería de datos en la provincia del Gualivá, Cundinamarca
Authors: Valenzuela-Sabogal Gina Maribel , Sosa-Cortes Jonathan Stit , Torres-Rojas Joseph David
Published: September 2020

Si bien algunos municipios de Cundinamarca cuentan con una amplia oferta turística, esta es poco aprovechada por visitantes debido al poco acceso a información al respecto. Lo anterior redunda en bajo número de visitas a algunos de sus municipios y poca visibilidad y reconocimiento de sus destinos turísticos. Cobra importancia entonces alentar al turista a conocer las diferentes actividades que puede encontrar en esta región, en específico en el sector de la provincia del Gualivá. Por ello el objetivo de este proyecto fue la aplicación de las TIC en el sector turístico de esta localidad del departamento. En la investigación se utilizó la metodología mixta, estructurada en el enfoque cuantitativo y cualitativo; de igual forma, en el desarrollo del proyecto se tomaron algunos elementos de Scrum. Con el desarrollo de este sistema de recomendación para la elección de destinos turísticos se despliegan los diferentes servicios y planes ofertados por los proveedores de servicios turísticos de cada municipio y se fomenta el desarrollo económico tanto a nivel individual como regional, lo cual permite a los pequeños proveedores ofertar de manera fácil y eficaz, así como impulsar las experiencias turísticas hacia un nuevo modelo de negocio mediado por la tecnología. Bajo la minería de datos se puede establecer que los perfiles de usuario son ejes fundamentales y consolidan el diseño ingenieril del sistema de recomendación con un software que apoyará en gran medida la promoción de servicios turísticos y la búsqueda de nuevas experiencias para turistas del departamento.
Company Integrates Offshore Windfarm Into Subsea Field Development
Authors: Carpenter Chris
Published: September 2020

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper OTC 30721, “Floating Offshore Windfarm Integrated Into Subsea Field Development: Case Study of the Saipem Windstream Concept,” by Benjamin Mauries, Giorgio Arcangeletti, SPE, and Christophe Colmard, Saipem, et al., prepared for the 2020 Offshore Technology Conference, originally scheduled to be held in Houston, 4-7 May. The paper has not been peer reviewed. Copyright 2020 Offshore Technology Conference. Reproduced by permission.

Operators are moving active production and injection equipment onto the seabed with the aim of reducing capital expenditures (CAPEX) or topside space requirements. Moreover, they want to minimize new production floating facilities. Given this scenario, overall electric power needs may become an issue because of the extra power demand caused by the increasing number of electric consumers placed subsea. The complete paper discusses a floating wind-turbine solution that is particularly cost-competitive for deepwater locations and that can unlock the possibility of deploying large wind-powered generators far from the coastline in deep water.

Introduction

Saipem launched an initiative aimed at finding a solution for management of subsea field power demand bearing in mind two primary considerations:

Minimize CAPEX by reducing the distance between the subsea-field production location and the topside equipment supporting this production

Decarbonize the field by adopting a renewable energy source

Concept Background and Potential Application

The operator has developed a floating substructure technology for offshore wind farms known as HexaFloat. This concept uses a minimal floating hexagonal tubular substructure supporting wind-turbine tower and providing necessary floatability. The substructure is connected by tendons to a basket counterweight filled with solid ballast providing stability with pendulum-restoring forces. The assembly of the basket and the substructure behaves as a rigid body if all tendons are loaded.

This assembly provides flotation with excellent stability thanks to the distance between the center of gravity and the center of buoyancy. Because this stability is provided by weight, large hydrostatic stiffness is unnecessary. As a result, only the central cylinder is exposed to the wave energy. The whole floating system can be anchored with three to six low-tension mooring lines, depending on environmental conditions.
The Future of Floating Production Systems
Authors: Feder Judy
Published: September 2020

This article, written by JPT Technology Editor Judy Feder, contains highlights of paper OTC 30715, “Floating Production Systems: What’s Next?” by William Judson Turner, SPE, Welligence Energy Analytics, prepared for the 2020 Offshore Technology Conference, originally scheduled to be held in Houston, 4-7 May. The paper has not been peer reviewed. Copyright 2020 Offshore Technology Conference. Reproduced by permission.

The complete paper provides insight on the commercial drivers that significantly changed floating-production-system (FPS) design philosophy after 2014, with a particular focus on the US Gulf of Mexico (GOM). The paper explores near-term and longer-term outlooks for FPS design, touching on technology and automation that can relocate staff onshore to increase safety, reduce capital expenditure (CAPEX) and operating expenses (OPEX), and increase return on investment (ROI). The authors note that the commercial analyses presented in the paper are indicative and are subject to revision.

Introduction

The drastic fall of oil prices in late 2014 forced a harsh but necessary overhaul to the design philosophy of deepwater projects. Bigger was no longer better; the industry set to work using methods such as lean design and standardization for commercial improvement. Through a slow recovery in commodity prices and a steady persistence in innovating and implementing improvements, the deepwater sector made significant strides in commercial and operational efficiency.

This overhaul was a rough 4-year journey as investment capital, and even some operators, retreated from deep water for lower-cost and faster-cycle onshore projects - at least, that was the perception at the time. Deep-water projects were delayed or canceled, and the industry saw consolidation among operators and the service sector. While the period may have been uncomfortable, it was a much-needed turnaround for an industry with average breakeven costs at $70 per barrel. The rework resulted in an industry fit to compete with onshore production, with breakeven costs reduced by half in some cases.
Technology Focus: Oilfield Chemistry (September 2020)
Authors: Wylde Jonathan
Published: September 2020

Anyone who works in the oil and gas industry is aware of hydrogen sulfide (H2S) gas. This is a highly toxic gas that gives rise to “sour” production. H2S is highly corrosive to many common materials used by the industry (e.g., mild steels), and there often are strict fiscal and technical limits placed on upstream oil and gas producers by the midstream and downstream operators.

The origin of H2S can be authigenic (i.e., occurs in-situ and naturally in the reservoir, related to the biological origin of the organic matter that produces the crude oil and gas), or it can be caused by biological processes and the action of sulfate-reducing bacteria (e.g., during seawater flooding and contamination of the reservoir).

The concentration range of H2S that occurs can vary from a few parts per million (ppm) to many tens of percent of the raw gas production. The range of concentrations that may be treated economically by chemical H2S scavengers is typically up to 5,000 ppm (0.5%). Higher concentrations may be treated by other means such as amine recycling unit sequestering systems.

The industry has relied upon the triazine family of chemistry for several decades as the mainstay scavenger for H2S (originally patented in the 1990s), and the understanding of the application parameters and reaction byproducts has grown over the years. There is, however, still much to understand, and, even recently, several significant advancements have occurred, many focusing on some of the understood challenges of using triazine chemistry. The featured papers and suggested further reading summarize the current SPE literature state of the art for H2S scavenger research and development and have been selected to give readers a broad indication from both academia and industry around the world.
JUNTS framework for creating web apps to bridge the gap in doctor-patient communication: the case of COMjuntos application in the field of rare diseases
Authors: Bagò Rosa Estopà i , Ruiz Manuel Armayones
Published: September 2020

Background.The diagnosis or even the suspicion of a disease on their children has an emotional impact on their parents and generates a need to acquire relevant knowledge and skills in a short period of time. For a range of motives, these parents will sometimes face communicative and cognitive barriers in their communication with the professionals that care for their children. These barriers can have a negative effect on knowledge acquisition, treatment adherence and, more generally, affect their relationship with clinicians. To overcome these barriers, we developed JUNTS framework following three steps: carrying out 10 semi-structured interviews with parents of child’s affected by a rare disease. Secondly, we carried out interviews with health professionals and patient’s organization staff. The third and last steep was to organize a meeting of the whole research team and patient’s association staff of Spanish Federation of Rare Disease and list a set of design trends that could help parents to solve the main communicational and linguistic barriers.Results.The JUNTS Framework presented here helps parents manage the communicative situations they find themselves in the relationship with health professionals, by exploiting a polyphonic design that includes different levels of involvement. One of the characteristics that makes this approach particularly unique is that parents and representatives of patient-support associations work jointly with health professionals, psychologists and language experts in designing the contents of a parents-support application. The Framework exploits a modular structure centred around a series of short challenges with different types of user involvement (visual, textual and hypertextual). For optimal adherence and to ensure patients complete the whole route through the support material, elements of persuasive design have been integrated.Conclusions.In this paper, we outline how the JUNTS framework has been designed and used to develop the web app COMjuntos based in JUNTS framework. This web app facilitates medical communication and has been specifically designed to help parents who have a child with a rare disease empower themselves in the main communicative situations with health professionals. The JUNTS framework can be adapted to any other type of chronic disease or condition.
Genome-wide Identification of ATP Binding Cassette (ABC) Transporter and Heavy Metal Associated (HMA) Gene Families in Flax (Linum usitatissimum L.)
Authors: Khan Nadeem , You Frank , Datla Raju , Ravichandhran Sridhar , Jia Bosen , Cloutier Sylvie
Published: September 2020

BackgroundThe recent release of the reference genome sequence assembly of flax, a self-pollinated crop with 15 chromosome pairs, into chromosome-scale pseudomolecules enables the characterization of gene families. The ABC transporter and HMA gene families are important in the control of cadmium (Cd) accumulation in crops. To date, the genome-wide analysis of these two gene families has been successfully conducted in some plant species, but no systematic evolutionary analysis is available for the flax genome. ResultsHere we describe the ABC transporter and HMA gene families in flax to provide a comprehensive overview of its evolution and some support towards the functional annotation of its members. The 198 ABC transporter and 12 HMA genes identified in the flax genome were classified into eight ABC transporter and four HMA subfamilies based on their phylogenetic analysis and domains’ composition. Nine of these genes, i.e., LuABCC9, LuABCC10, LuABCG58, LuABCG59, LuABCG71, LuABCG72, LuABCG73, LuHMA3, and LuHMA4, were orthologous with the Cd associated genes in Arabidopsis, rice and maize. Ten motifs were identified from all ABC transporter and HMA genes. Also, several motifs were conserved among genes of similar length, but subfamilies each had their own motif structures. Both the ABC transporter and HMA gene families were highly conserved among subfamilies of flax and with those of Arabidopsis. While four types of gene duplication were observed at different frequencies, whole-genome or segmental duplications were the most frequent with 162 genes, followed by 29 dispersed, 14 tandem and 4 proximal duplications, suggesting that segmental duplications contributed the most to the expansion of both gene families in flax. The rates of non-synonymous to synonymous (Ka/Ks) mutations of paired duplicated genes were for the most part lower than one, indicative of a predominant purifying selection. Only five pairs of genes clearly exhibited positive selection with a Ka/Ks ratio greater than one. Gene ontology analyses suggested that most flax ABC transporter and HMA genes had a role in ATP binding, transport, catalytic activity, ATPase activity, and metal ion binding. The RNA-Seq analysis of eight different organs demonstrated diversified expression profiling patterns of the genes and revealed their functional or sub-functional conservation and neo-functionalization. ConclusionCharacterization of the ABC transporter and HMA gene families will help in the functional analysis of candidate genes in flax and other crop species.
Evaluation of image quality at the detector’s edge of dedicated breast positron emission tomography
Authors: Satoh Yoko , Motosugi Utaroh , Imai Masamichi , Omiya Yoshie , Onishi Hiroshi
Published: September 2020

Background: The dedicated breast positron emission tomography (dbPET) scanner (Elmamo, Shimadzu, Kyoto, Japan) has received approval from the Japanese Pharmaceutical Affairs Law and is commercially available in Japan. We assessed image quality of dbPET at the detector's edge, where the mammary glands near the chest wall are located in phantom and clinical studies.Methods: A breast phantom with four spheres (16, 10, 7.5, and 5 mm diameter) was filled with 18F-fluorodeoxyglucose solution (sphere-to-background ratio, 8:1). The spheres occupied five different positions from the top edge to the centre of the detector and were scanned for 5 min in each position. Reconstructed images were visually evaluated, and the contrast-to-noise ratio (CNR), contrast recovery coefficient (CRC) for the 5-mm sphere, and coefficient of variation of the background (CVB) were calculated. Subsequently, clinical images obtained with standard spine PET/CT and prone dbPET were retrospectively analysed. Tumour-to-background ratios (TBRs) between breast cancer near the chest wall (close to the detector’s edge; peripheral group) and at other locations (non-peripheral group) were compared. The TBR of each lesion was compared between dbPET and PET/computed tomography (CT).Results: Closer to the detector’s edge, the CNR and CRC decreased while the CVB increased in the phantom study. The disadvantages of this placement were visually confirmed. Regarding clinical images, TBR of dbPET was significantly higher than that of PET/CT in both the peripheral (12.38±6.41 vs 6.73±3.5, p=0.0006) and non-peripheral (12.44±5.94 vs 7.71±7.1, p=0.0183) groups. There was no significant difference in TBR of dbPET between the peripheral and non-peripheral groups (12.4±6.4 vs 12.4±5.9, p=0.8261).Conclusion: The phantom study revealed poorer image quality closer to the detector edge at a depth of <2 cm from the detector's edge than at other more central parts. In clinical studies, however, the visibility of breast lesions with dbPET was the same regardless of the lesion position, and it was higher than that in PET/CT. dbPET has a great potential for detecting breast lesions near the chest wall if they are at least 2 cm from the edge of the FOV, even in young women with small breasts.