bluuebunny/crossref_metadata_2025 huggingface dataset:
Televisão regional no Brasil: uma proposta de sistematização de períodos históricos
Authors: Oliveira Filho José Tarcísio
Published: January 2022

O artigo propõe-se a uma revisão histórica bibliográfica e documental do telejornalismo regional no Brasil, com foco nos aspectos ligados à mídia televisiva em cada capital brasileira precursora de produção regional/local. Para isso, são sistematizados três momentos históricos: 1) a fase inicial, nas décadas de 1950 e 1960, em que surgem as primeiras tevês locais/regionais e as, então, novas tecnologias de produção e transmissão; 2) o período de ampliação dos telejornais com foco regional, entre as décadas de 1970 e 1990; 3) o cenário contemporâneo, em que são descritos os desafios e as consequências do percurso histórico brasileiro – principalmente devido à predominância do modelo comercial e de grandes grupos econômicos que detém as emissoras locais e regionais.
Passado no presente: racismo, imprensa e imaginário
Authors: Silva Juremir Machado da
Published: January 2022

Este texto aborda o tratamento do racismo pela imprensa no século XIX, à época da abolição da escravatura no Brasil. Trata-se também de tentar ver como esse passado se insinua no presente, atravessando os séculos como um imaginário cristalizado.
A prática fotográfica e as questões étnico-raciais: entre poética, documento e política
Authors: Rabelo Elson De Assis
Published: January 2022

Neste trabalho, discuto sobre fotografias e trajetórias de fotógrafos negros contemporâneos na Bahia, como inserção em diferentes circuitos sociais das imagens, como afirmação das práticas culturais negras e como enfrentamento das desigualdades sociais baseadas em cor. Também abordo o papel das práticas de arquivamento no diálogo com as memórias e com as demandas atuais por olhares negros nas narrativas e nos espaços expositivos.
Editorial
Authors: História da Mídia Associação Brasileira De Pesquisadores de
Published: January 2022

Editorial
PEMANFAATAN RUANG TERBUKA (OPEN SPACE) UNTUK TEMPAT BERKUMPUL DI JALUR PEJALAN KAKI
Authors: Febriarto Prasetyo
Published: January 2022

Jalur pejalan kaki merupakan merupakan suatu pelengkap penting dalam penghubung pencapaian yang mudah selain menggunakan moda lain diperkotaan. Jalur pejalan kaki di jalan Jenderal Soedirman kota Yogyakarta merupakan ruang secara sekilas kosong karena jarang dilintasi orang maka ruang terbuka tersebut menjadi peluang dan pilihan mendesak untuk melanjutkan kehidupan. Muncul aktivitas selain pejalan kaki yahg dapat menjadi tempat berkumpul dan mengapa ruang terbuka (open space) berupa jalur pejalan kaki menjadi tempat aktivitas selain berjalan kaki dan faktor apa yang mempengaruhi terjadinya perilaku tersebut. Tujuan penelitan ini untuk mengetahui intensitas penggunaan jalur pejalan kaki. Penelitian ini menggunakan metode penelitian eksploratif dengan analisis deskriptif, karena pengetahuan peneliti masih dangkal maka perlu pengecekan secara fakta dilapangan, berharap menemukan sesuatu yang menjadi temuan awal untuk menggambarkan sesuatu hal yang terjadi di lokasi penelitian. Metode ini didukung studi literatur terkait agar semakin teruji dan terarah. Hasil dari penelitian ini, bahwa aktivitas di ruang terbuka publik selain untuk para pejalan kaki merupakan aktivitas yang memutuskan jalur pergerakan pejalan kaki. Para pejalan kaki mengubah perilaku karena sesuai perubahan lingkungan. Simpulan dari penelitian ini, bahwa jalur pejalan kaki tidak sesuai dengan fungsinya, disfungsi jalur pejalan kaki dengan keberadaan aktivitas selain pejalan kaki yang merampas hak para pejalan kaki.
A Study of the Impact of Squirrel-Cage Rotor Faults on the Stator Current Signature
Authors: Streblau Maik Jurgen , Todorov Marin , Dimova Tatyana
Published: January 2022

The present paper considers the impact of the degree of damage to a squirrel-cage rotor of an induction motor on the spectrum of the stator current. The study is based on the motor current signature analysis. Performed, for this purpose, were scientific experiments on eight samples of squirrel-cage rotors, seven of which with pre-inflicted faults using Dynamic Motor Analyser. The obtained results are herein presented in graphical and tabular form and are further compared with the ones acquired from an induction motor with an intact rotor winding. It can be clearly ascertained that the larger the number of damaged rotor bars, the more significant the increase in the current amplitude as correspondent to the side band amplitude.
STUDY ON LABOR INTEGRATION OF GROUPS OF PEOPLE, FACING SERIOUS DIFFICULTIES IN GAINING EMPLOYMENT IN THE LABOR MARKET OF BULGARIA
Authors: Todorova Svetlana Ivanova
Published: January 2022

The survey aims to identify the factors influencing the different levels of unemployment in Bulgaria through the use of statistical methods and official statistical information regarding the labor market for the period 2015-2019. To achieve the research goals, a regression model was developed, disclosing the relationship between a dependent variable (total unemployment rate) and a system of independent variables reflecting the influence of factors for the analyzed period. The nature of the dependencies is established, statistically significant factors are selected and ranked, the degree of influence for each of them is determined, the adequacy of the model is checked and the results obtained are fully analyzed. Based on the findings achieved, conclusions are formulated and measures are proposed aimed at a general reduction of the unemployment rate in the country, as well as to increase the opportunities for employment of various categories of unemployed persons with disabilities.
Dog Therapy for Staff in a Pediatric Emergency Department: A Quality Improvement Project
Authors: Mash Haley , Bauldoff Gerene , Kosla Jennifer , Harrison Tondi
Published: January 2022

AbstractBackground: Recent surveys of our pediatric emergency department staff showed a decrease in staff morale related to increased stress, indicating the need for intervention. Animal-assisted therapy has been shown to have multiple other positive effects in various populations including decreased stress and anxiety reduction. Our existing dog therapy program was unpredictable and inconsistent, resulting in limited staff involvement.               Objectives: The purposes of this project were to determine whether a consistently offered dog therapy program in our pediatric emergency department would be utilized by staff and to elicit staff feedback on the program.Methods: A therapy dog was scheduled for one hour twice weekly for staff to visit when they were available. All staff in the ED were encouraged to attend these sessions.Results: Staff responses were collected via pre- and post-intervention questionnaires. The percentage of staff who were not able to visit the dogs pre-intervention was 33%, decreasing to 15% post-intervention. Prior to project initiation, 60% of staff indicated that dog therapy was not offered enough, compared to only 37% after project completion. Staff reported the program was a morale booster and added positivity to the unit. Barriers to participation and suggested improvements were identified.Conclusions: Staff were able to participate in dog therapy more often during the project than prior to project implementation, meeting the overall goal of providing more accessible dog therapy to staff. The program was well-received and has now become a standard offering for our emergency department staff.Keywords: animal assisted therapy, professional burnout, emergency departments, job-related stress, complementary therapy, compassion fatigue
Relationships of Osmolality and Oxidative Stress with Semen Quality and Their Effects on Male Fertility
Authors: Ameen Edrees Mohammad
Published: January 2022

The objective of this study was to investigate and find the relationships between human semen osmolality and oxidative stress with semen quality. Semen analysis was determined to evaluate semen quality and fertility. The concentration of semen malondialdehyde (MDA) was measured to assess oxidative stress. For this purpose, one hundred seventy healthy adult males were used in this study. The study was conducted from September 2018 to November 2019 in the Infertility care and in vitro fertilization center (IVF) and the Biology department of the College of Science at Salahaddin University in Erbil city. A significant positive correlation was observed between the total sperm motility, grade activity, and sperm motility index with semen osmolality less than 300 mOsm kg-1 (r= 0.62, r = 0.64, and r= 0.75 pâ‰¤0.01 respectively) and osmolality 300-350 (r= 0.53, pâ‰¤0.05  r= 0.52 pâ‰¤0.05, and r= 0.56 pâ‰¤0.01 respectively). Total sperm motility, grade activity, and sperm motility index are negatively correlated with osmolality 351-400 mOsm kg-1 (r= -0.65 pâ‰¤0.05, r= -0.56 pâ‰¤0.05, and  r= -0.67 pâ‰¤0.01) and more than 400 mOsm kg-1 (r= -0.86, r = -0.74 and r= -0.88 pâ‰¤0.01). Regarding the relation between oxidative stress and sperm motility kinetics, total sperm motility, grade activity, and sperm motility index is negatively correlated with MDA more than 2 Âµmol/L (r= -0.56 pâ‰¤0.05, r= -0.52 pâ‰¤0.05, and r= -0.67 pâ‰¤0.01 respectively). No significant correlation was found between semen osmolality and MDA concentration with sperm concentration, total sperm count, sperm viability, and normal sperm morphology.
Improved Certificate-Based Encryption Scheme in the Big Data: Combining AES and (ECDSA â€“ ECDH)
Authors: Shareef Omar Salah F. , Sagheer Ali Makki
Published: January 2022

Big data usually running in large-scale and centralized key management systems. However, the centralized key management systems are increasing the problems such as single point of failure, exchanging a secret key over insecure channels, third-party query, and key escrow problem. To avoid these problems, we propose an improved certificate-based encryption scheme that ensures data confidentiality by combining symmetric and asymmetric cryptography schemes. The combination can be implemented by using the Advanced Encryption Standard (AES) and Elliptic Curve Diffie-Hellman (ECDH). The proposed scheme is an enhanced version of the Certificate-Based Encryption (CBE) scheme and preserves all its advantages. However, the key generation process in our scheme has been done without any intervention from the certificate issuer and avoiding the risk of compromised CA. The Elliptic Curve Digital Signature Algorithm (ECDSA) has been used with the ECDH to handle the authentication of the key exchange. The proposed scheme is demonstrated on a big dataset of social networks. The scheme is analyzed based on security criteria that have been compared with the previous schemes to evaluate its performance.
Exact Solutions for Minimizing cost Function with Five Criteria and Release Dates on Single Machine
Authors: Chachan Hanan Ali , Jaafar Hussein Abdullah
Published: January 2022

In this paper, we present a Branch and Bound (B&B) algorithm of scheduling (n) jobs on a single machine to minimize the sum total completion time, total tardiness, total earliness, number of tardy jobs and total late work with unequal release dates. We proposed six heuristic methods for account upper bound. Also to obtain lower bound (LB) to this problem we modified a (LB) select from literature, with (Moore algorithm and Lawler's algorithm).  And some dominance rules were suggested. Also, two special cases were derived. Computational experience showed the proposed (B&B) algorithm was effective in solving problems with up to (16) jobs, also the upper bounds and the lower bound were effective in restricting the search.
Engineering strategies towards the cataclysmic impacts of Urbanisation on water resources sustainability
Authors: Obi Lawrence E
Published: January 2022

This research deemed it necessary to investigate the cataclysmic effects of urbanization on water resources because of the indispensability of this natural resource to the existence of human life. Urbanisation geared up activities which created challenges such as population explosion, high rate of crime, increased temperature, global warming, scarcity of water supply, flooding, erosion, energy supply crisis, steam/river extinction and increased waste generation. Water resources are adversely affected in many forms and dimensions and this work was able to evolve engineering strategies which when applied can improve the water resources and enhance its sustainability capacity. The research opined that the construction of incinerators, landfills and waste stabilization ponds, drainage channel development and adjustment, effective water management, small hydropower stations, structural delineation of green belt and ripararian zones and construction of retention ponds will go a long way to place the water resources in the urban cities on a sustainable path. These measures and approaches have the capacity to curb and /or bring the cataclysmic effects of urbanization on water resources to the barest minimum.
Community water supply project in Ikuru Town, Andoni, Rivers State: performance and challenges
Authors: Ijeoma Immaculata Nwajuaku  , Njideka Ophelia Ezetoha  , Nwanneka Genevieve Ezeokoye
Published: January 2022

The paper aims at evaluating the performances and challenges of a community water supply project in Ikulu town. At the outset of 2021, as the decade of action to deliver the sustainable development goals (SDG) by 2030 gets underway, Ikuru Town is not on track to achieve Goals 6 (clean water and sanitation). Assessment of the Ikuru water supply project involved two ways: visitation to the treatment plant to observe the condition of the facility and use of the unstructured interview. Water samples were collected after treatment from the user point. Sampling was repeated three times on three different days. Physicochemical and microbial qualities of water samples were analyzed, using the standard for examination of water and wastewater by APHA. Results showed that total coliform bacteria were present in the water sample. Iron concentration was above the WHO limit. The concentration of manganese was above the recommended level and Iron bacteria were also present after treatment. In conclusion, the water is not potable and palatable due to its objectionable taste and orange brown colour. Therefore, there is needs for drastic treatment of Ikulu community water project at the point source, using shock chlorination as a recommended method to improve its performance level. Moreover, supportive intervention is required from governmental institutions to overcome the challenges of this water project for sustainability.
Effects of seed extracts of turmeric (Curcuma longa linn) on Escherichia coli and Streptococcus species isolated from urine of patients in Wukari, Taraba State, North East, Nigeria: Prospective antimicrobial alternative for Urinary Tracts Infections
Authors: Edobor Peter Kenneth Imarenezor  , Onolunosen Abel Abhadionmhen  , Samuel Tamunoiyowuna Cockeye Brown  , Joyce Briska  , Paula Paul Shinggu  , Sunday Danya
Published: January 2022

Antimicrobial activity of different herbal extracts in different regions of the worlds has been established as a panacea to the advancement of effective chemotherapy against resistant bacteria. Seed extracts of turmeric as one of the antibacterial agents has been examined to this effect. Turmeric (Curcuma Longa, Linn), is one of the most useful herbal medicinal plants owing to its biological active component Curcuminoids, which are natural phenols. Turmeric has shown to be effective as anti- inflammatory, anti-oxidant, antifungal, antiulcer, and anticancer, thus has a potential against various malignant diseases such as, diabetes, allergies, arthritis, Alzheimer’s disease and other chronic diseases. This study examined the antibacterial activity of turmeric seed against Streptococcus species and Escherichia coli isolated from urine samples of patients. The antibacterial activities of aqueous and ethanolic extracts of dried and fresh turmeric seed was tested on the organisms using standard bacteriological technique. The zone of inhibition was more significant on the ethanolic extract of the fresh seeds and at a higher concentration (15g – 80ml and 20g – 100ml) on both organisms. Also, on both organisms, the result obtained revealed resistance of isolates to the aqueous extracts of the dried seed with heavy and moderate growth. In conclusion, the results obtained from the turmeric extracts shown considerable antimicrobial activity against Streptococcus species and Escherichia coli and can be used as a broad spectrum natural antimicrobial alternative for treating Urinary Tracts infections.
Data Protection Legislation in the Area of Health Research in EU
Authors: Victoria Jekova
Published: January 2022

There are strict regulations and restrictions in the European legislation about personal data and medical information, collected from the patients. Some of the legal requirements have recently been implemented and still confuse medical and research circles and insufficient information of doctors about what is allowed and what is not. On the other hand, physicians and researches need to use data for the development of the medical science, in interaction with other physicians and medical institutions, for statistics, prevention, and public health, for clinical trials, est. The aim of the current survey is to highlight some areas of the Data Protection Legislation that are particularly relevant to the area of health research.
Pendampingan Kegiatan Prarancangan Sentra Produksi Anyaman Bambu sebagai Pendorong Ekonomi Perdesaan Desa Kayubihi, Bangli
Authors: Agusintadewi Ni Ketut , Muktiwibowo Antonius Karel , Manik I Wayan Yuda , Pebriyanti Ni Luh Putu Eka , Wiryawan I Wayan
Published: January 2022

Desa Kayubihi memiliki tradisi budidaya dan kerajinan anyaman bambu yang sangat khas. Sejak 2014, Pemerintah Kabupaten Bangli menetapkan desa ini sebagai sentra industri rumah tangga anyaman bambu. Namun saat ini, jumlah pengrajin yang berorientasi ekspor di pasar global dan domestik semakin menurun karena belum tersedianya fasilitas yang memadai dan terpadu untuk mewadahi aktivitas pengrajin untuk kegiatan promosi, pameran, produksi, penjualan, pelatihan, maupun pelayanan informasi tentang modal, hak cipta, dan kewirausahaan. Semakin banyak generasi muda yang beralih profesi karena profesi pengrajin dianggap kurang menjanjikan secara finansial. Produksi pengrajin yang masih bertahan juga kalah bersaing dengan daerah atau negara lain karena kurang didukung oleh informasi perkembangan motif dan bentuk baru yang disukai pasar. Pengabdian ini bertujuan untuk merancang fasilitas sentra produksi kerajinan anyaman bambu yang dapat menjadi jembatan penghubung antara pengrajin dengan pemerintah, pengrajin dengan pasar, serta budaya dengan wisatawan. Metode pendekatan perancangan menggunakan combine methods, yaitu memadukan pendekatan kualitatif pada pengumpulan data dan metode merancang pada saat preliminary design. Hasil rancangan menerapkan arsitektur ekologi yang berbasis Tri Hita Karana sebagai pendekatan desain untuk mengangkat nilai-nilai lokal dan bersinergi dengan lingkungan sekitarnya, terutama penggunaan bambu sebagai material bangunan.
A geophysical pulse voltage generator for seismic and electric exploration of the subsurface
Authors:   Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences, Dudchenko I.P. , Kostylev D.V. ,   Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences, Gulyakov S.A. ,   Institute of Marine Geology and Geophysics, Far Eastern Branch, Russian Academy of Sciences, Stovbun N.S. ,   Institute of Marine Geology and Geophysics of the Far Eastern Branch of the RAS
Published: January 2022

This article describes the process and results of the development and testing of a cost-effective, portable, safe to move by air geophysical pulse voltage generator for seismic exploration of the subsurface. The generator is based on high-speed power electronic keys of a new generation consisting of an insulated gate bipolar transistor or a field-effect transistor based on silicon carbide, a compact power converter of alternating voltage from an autonomous generator or electric network to direct voltage using pulse-width modulation and current or voltage stabilization depending on the mode set by a researcher. Field tests were conducted to confirm the suitability of the developed design of the generator and the correctness of the chosen parameters of its elements. To this end, a detailed analysis of the effect of the developed geophysical generator on the parameters of the geoenvironment was carried out.
On some aspects of the article «On the stress drop in North Eurasia earthquakes source-sites versus specific seismic energy»
Authors:   Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences, Rebetsky Yu.L.
Published: January 2022

In the article by N.A. Sycheva and L.M. Bogomolov, the authors proposed to combine the interrelated data on the stress drop in the earthquake sources, ∆σ, and reduced seismic energy, ePR, to analyze the dependence of these parameters on earthquake scale along with expansion of the measurement statistics (assessments). The dependence of these parameters of a source on the seismic moment or on the earthquake magnitude within 2.2 ≤ М ≤ 4.0 magnitude range has been determined using the example of the Northern Tien Shan (Bishkek geodynamic polygon with the KNET network). The author of the letter to the editor notes the article conclusions to be limited, because such relationship is only manifested within the more or less narrow range of the magnitudes. Attention is also drawn to the semantic difference between the ∆σ and ePR parameters. It is the reduced seismic energy that reflects the mean strain in the source area, and its appliance to the analysis of scale dependences of earthquake sources is more informative.
On a new predictor affecting ice formation in the Sea of Okhotsk
Authors:   Sakhalin State University, Korablev O.A.
Published: January 2022

Heat exchange between the three media – water, ice and air – must be taken into account when predicting the ice dynamics, drift and redistribution. It is known that the components of the heat balance vary quite strongly depending on the boundary of which media they are considered. Evaporation and turbulent heat exchange with the atmosphere are great in the areas of pure water, while evaporation from the surface of ice and snow is much less pronounced. To study the appearance of ice, it is necessary to consider only those environments between which intense heat exchange takes place; these environments are water and the atmosphere. This article studies the thermodynamic processes occurring over the seawater area by the statistical method of correlation analysis using the data on air temperature collected at hydrometeorological stations and those on the ice area from open sources. A new predictor is proposed, indicating a high correlation of 0.90–0.95 between the sum of degrees of daily temperature difference at the hydrometeorological stations of Okha and Oymyakon and the data on the area of the sea ice in the northwestern region of the Sea of Okhotsk on the last day of the month.
An algorithm for processing ice areas by Earth remote sensing data (by the example of MASIE-NH data)
Authors:   Sakhalin State University, Nikonov V.S.
Published: January 2022

An algorithm was developed to automate processing of large datasets of Earth remote sensing. The algorithm was developed and implemented in the form of an M-Processor program in the Python programming language using the modules of the ArcGIS Desktop 10.2 software, which allows complex calculations without spending additional time on programming and reduces the number of manipulations for calculating separate desired characteristics. The implementation of the developed algorithm is considered on the example of calculating the numerical characteristics of the ice area in the Sea of Okhotsk according to the data of the Multisensor Analyzed Sea Ice Extent – Northern Hemisphere (MASIE-NH) with a spatial resolution of 1 and 4 km and an ice-cover zoning mask.
PERENCANAAN INSTALASI SISTEMAIR CONDITIONERTIPE VRFPADA GEDUNG PERKANTORAN ENAM LANTAI UNTUK MENDUKUNG PROGRAM GREEN BUILDING
Authors: Putra Riki Chandra , Abrar Muhammad
Published: January 2022

Kenyamanan dalam suatu ruangan diperkantoran atau rumah, merupakan kebutuhan, terutama di Indonesia yang memiliki iklim tropis (panas). Karena itu sistem pendingin udara atau sistem tata udara (sistem AC) telah menjadi kebutuhan di gedung-gedung perkantoran, oleh karena itu pengaturan atau perencanaan penempatan Air Conditioner (sering disebut sebagai AC) dalam sistem atau mekanisme bangunan atau gedung yang dirancang untuk kelembapan (dehumidify). Karena AC adalah barang mewah dan mahal maka konsep Green Building hadir dan menjadi suatu kebutuhan ditengah fenomena global warming dan isu kerusakan lingkungan yang sedang melanda bumi, untuk perencanaan instalasi AC di gedung perkantoran enam lantai di Jakarta menggunakan sistem VRF (Variable Refrigerant Flow) dengan teknologi yang sudah dilengkapi dengan CPU dan kompresor inverter dan sudah terbukti menjadi handal, efisiensi energi, berbeda dengan pendahulunya (Single Split, Split Duct, dll). Sistem VRF merupakan suatu teknologi pengaturan kapasitas AC yang memiliki kemampuan untuk mencegah pendinginan yang berlebih pada suatu ruangan, sehingga dapat menghemat listrik, juga memiliki tingkat kebisingan yang rendah dan hemat tempat karena dapat menggunakan satu kondensor untuk mensuplai beberapa evaporator, serta dapat mengatur jadwal dan temperatur AC yang diinginkan secara terkomputerisasi.
ANALISA PENGARUH PURIFIKASI BIOGAS UMT-17 MENGGUNAKAN MOLECULAR SIEVE TERHADAP PERSENTASE CH 4 , CO 2 , DAN H 2 S
Authors: Iskandar Ahmad , Ambar Fadholi
Published: January 2022

Penelitian untuk pengembangan biogas semakin hari semakin maju. Berbagaimodel rancangan biogas telah banyak dibuat dan dilakukan pengujian. Salah satumodel rancangan biogas yang dikembangkan dalam penelitian ini adalah biogasdigester model portable yang bertujuan agar lebih simpel dalam pembuatan, lebihmudah difungsikan dan juga mudah dipindahkan.Biogas digester yang diberinama Biogas UMT-17 ini dibuat dengan memanfaatkan limbah kotoran sapi dandirancang se-praktis dan se-efisien mungkin dengan menggunakan part-partsederhana yang mudah dibuat atau dibeli di toko-toko material. Kandunganutama biogas yang dihasilkan berupa CH4, CO2, H2S dan beberapa jenis gas lain,memerlukan suatu upaya pemurnian untuk meningkatkan jumlah kandungan gasmetan (CH4) tersebut. Karbon molecular sieve merupakan senyawa yang mampumengikat partikel-partikel tertentu dan menyaring karbondioksida, hidrogensulfida serta komponen-komponen lain yang tidak diperlukan. Untuk itulahdalam pembuatan Biogas UMT-17 ini dilengkapi alat pemurnian yang disebutpurifier dan diisi dengan molecular sieve sebagai bahan purifikasinya. Dalamlaporan ini akan dibahas kandungan biogas sebelum proses purifikasi dandibandingkan dengan kandungan setelah proses purifikasi dengan menggunakanbeberapa metode yaitu kontinyu, non-kontinyu dan perbedaan lama waktupurifikasi.Kata Kunci: Biogas, Molecular Sieve, Biodigester.
ANALISIS PERHITUNGAN HEATRATE PADA TURBIN UAP BERDASARKAN PERFORMANCE TEST UNIT 1 DI PT. INDONESIA POWER UBOH UJP BANTEN 3 LONTAR
Authors: Permana Jamaludin , DH Reza Pangestu
Published: January 2022

Heat rate mempunyai peranan yang sangat penting pada pembangkit listrik.Heatrate merupakan ukuran dari thermal sebagai jumlah dari energi bahanbakar yang dibutuhkan untuk menghasilkan sejumlah energi listrik.Satuanheatrate yaitu kJ/kWh. Penelitian ini bertujuan untuk mengetahui nilaiturbineheatrate pada turbin uap berdasarkan performance test. Pengambilandata dilakukan dengan metode observasi di PT. INDONESIA POWER UJPBANTEN 3 LONTAR (PLTU) pada pembangkit unit 1. Untuk mengetahui nilaiturbine heatrate pada turbin uap digunakan metode perhitungan berdasarkanmassa uap “steam” dan energi dalam “entalphy” yang masuk dan keluar turbindengan daya keluaran generator (output generator). Turbine heatrate berbandingterbalik dengan efisiensi, yang artinya semakin kecil nilai turbineheatrate maka semakin baik efisiensi pembangkit tersebut, sebaliknya semakintinggi nilai turbine heatrate maka efisiensi pembangkit tersebut buruk. HasilAnalisa yang didapat pada turbine heatrate berdasarkan performance test unit1dengan nilai terendah (terbaik) yaitu pada bulan Januari dengan nilai 8252.61kJ/kWh, dan nilai tertinggi (terburuk) yaitu pada bulan Maret dengan nilai8911.99 kJ/kWh. Kenaikan dan penurunan turbin heatrate tidak begitusignifikan. Kata Kunci: Heatrate, Turbin Uap, Turbine, Heatrate, Performance Test.
ANALISA PENGARUH TEMPERATUR TERHADAP LUBRIKASI PADA MOULD DAN KUALITAS WHEEL PADA PROSES DIE CASTING
Authors: Iskandar Ahmad , Duta Amir , Amrullah Amrullah
Published: January 2022

Teknologi pada proses cetakan Die Casting telah digunakan untuk membuat produk yang relatif mudah dibandingkan dengan proses Machining. Selain itu, berbagai literatur melaporkan keunggulan teknologi proses die casting yang terbukti mampu memproduksi suatu produk dengan harga yang relatif rendah dengan kualitas yang lebih baik. Modal utama proses produksi dengan rute ini adalah proses die casting dengan berbagai metoda baik secara mekanik, kimiawi, dan pressure. Dalam penelitian ini difokuskan pada proses produksi Casting Wheel dengan metode cetakan pada proses High pressure die casting dengan cara menganalisa suatu temperatur cetakan untuk memaksimalkan lubrikasi cetakan dalam mempengaruhi terhadap kualitas suatu produk wheel. Hasil yang diharapkan setelah menganalisa proses ini yaitu dapat dihasilkannya suatu produk dengan kualitas terbaik untuk memenuhi standar pada proses die casting karena kebutuhan dari pihak perusahaan untuk dimanfaatkan sebagai meningkatkan produktifitas produksi pada proses die casting. Kata kunci : Die Casting, Wheel, High pressure, Dies/Cetakan
RANCANG BANGUN SIMULATOR SISTEM AIR CONDITION (AC) PADA MOBIL TYPE SANDEN
Authors: Jamaludin Jamaludin
Published: January 2022

Mobil yang menggunakan AC telah menjadi sebuah kebutuhan bagi pengendaranya. Sebagai penggunanya, ada baiknya jika dapat mengenal komponen atau bagian serta cara kerja AC mobil sehingga dapat mengetahui penyebab kerusakan pada AC mobil. Menanggapi hal ini maka hampir semua Agen Tunggal Pemegang Merek (ATPM) kendaraan bermotor di Indonesia telah memasarkan kendaraan (terutama mobil pribadi) yang dilengkapi dengan Air Conditioner (AC), yang mana dalam hal ini memerlukan tenaga mekanik atau teknisi yang professional dalam menanganinya baik pemasangan, perawatan, dan perbaikannya. Mengacu pada hal tersebut, untuk mengetahui penyebab kerusakan pada AC mobil dibuatlah alat simulator AC mobil. Dalam merancang simulator AC mobil, hal pertama yang dilakukan adalah merancang kerangka stand simulator. Kerangka stand didesain menggunakan autoCAD 2010. Bahan untuk merancang kerangka stand menggunakan besi hollow galvanis. Besi hollow galvanis dipotong, kemudian melakukan pengelasan pada besi hollow galavanis yang sudah dipotong. Setelah kerangka stand sudah jadi, dilakukan pemasangan komponen-komponen AC mobil. Proses pemasangan komponen dimulai dari pemasangan kompresor, pemasangan motor dinamo, pemasangan V belt kompresor dan motor dinamo, pemasangan kondensor dan kipas fan blower, pemasangan evaporator, pemasangan filter dryer atau receiver dryer, pemasangan trafo, pemasangan pipa refrigerant, dan melakukan pengisian freon.
ANALISIS KINERJA HEAT EXCHANGER TYPE SHELL AND TUBE BERBAHAN TEMBAGA ALIRAN SEARAH DAN ALIRAN BERLAWANAN TANPA RADIATOR
Authors: Fattah Fanni , Iskandar Ahmad
Published: January 2022

Alat penukar kalor atau heat exchanger adalah suatu alat yang memungkinkan perindahan panas dan bisa berfungsi sebagai pemanas maupun sebagai pendingin. Penukar panas dirancang sebisa mungkin agar perpindahan panas antar fluida dapat berlangsung secara efisien. Pertukaran panas terjadi karena adanya kontak, baik antara fluida yang bercampur maupun fluida yang terpisahkan oleh sekat. Perubahan laju aliran pada heat exchanger tertunya berpengaruh terhadap pendinginan.Tujuan  penelitian ini adalah (1) Mengetahui dan memahami sistem kerja heat exchanger type shell and tube. (2) Mampu menganalisa dan menyimpulkan hasil penelitian laju aliran pada shell and tube dengan tabel maupun grafik.Perpindahan kalor tersebut selisih temperatur tube (masuk dan keluar) untuk fluida panas tanpa pendingin dan hasil pada fluida panas dengan fluida dingin yang akan berhubungan dengan perbedaan rata-rata fluida panas dan dingin dan nilai afktifitas alat penukar kalor. Sebagai variebel laju aliran yang akan dirubah untuk mencari perbandingan.  Setelah dilakukan perbaikan dan perancangan ulang Alat uji heat exchanger generasi ke-2 sudah lebih baik dibandingkan  dengan alat uji heat exchanger generasi pertama, dilihat dari  Efektifitas alat heat exchanger ditemukan adanya peningkatan keefektifan dari 12% menjadi 91,94% kenaikan Efektifitas heat exchanger dikarenakan sudah tidak adanya kebocora pada sekat shell and tube (bufler).
PENGARUH PENAMBAHAN ADITIF OCTANE BOOSTER TERHADAP CAMPURAN PERTALITE UNTUK MENINGKATKAN UNJUK KERJA MESIN MOTOR AUTOMATIC SATU SILINDER 125 CC
Authors: Amir Amir , Putra Riki Candra
Published: January 2022

Fungsi zat aditif untuk menyempurnakan proses kimia pembakaran, membersihkan mesin dari semua timbunan kotoran, baik itu pada intake valve, port fuel injector dan combuction chamber, mencegah korosi pada saluran dan tangki,tentunya kinerja mesin akan meningkat.  Zat aditif yang akan digunakan pada pengujian ini adalah bullsone shot motorbike.Dengan beberapa kelebihan dari Zat Aditif maka perlu dilakukannya pengujian performa terhadap kendaraan Pengujian performa campuran pertalite dengan zat aditif yang dilakukan salah satunya diharapkan dapat mengetahui seberapa besar pengaruh terhadap daya dan torsi pada mesin. Daya merupakan kemampuan kendaraan untuk mencapai kecepatan tertinggi dalam waktu tertentu, sedangkan torsi merupakan gaya atau kemampuan mesin untuk menggerakan kendaraan dari posisi diam sampai berjalan. Dengan menggunakan bahan bakar pertalite dan campuran zat aditif sebesar 100 ml menghasilkan daya dan torsi yang lebih tinggi dibandingkan dengan menggunakan pertalite murni. Peningkatan pada torsi maksimum sebesar 1,02 Kg.m dan peningkatan pada daya maksimum sebesar 10,13 PS.
ANALISIS KARAKTERISTIK MATERIAL KOMPONEN PADA RANCANG BANGUN MESIN ROBOT DRAWING HYBRID LASER
Authors: Sumarno Sumarno , Riyadi Slamet
Published: January 2022

Mesin Robot Drawing Hybrid Laser merupakan Mesin yang dikontrol oleh komputer dengan menggunakan bahasa numerik (data perintah dengan kode angka, huruf dan simbol) sesuai standar ISO. Mesin Robot Drawing Hybrid Laser ini menggunakan software-software antara lain Arduino, Processing, Camotic, Laser GRBL dan Inkscape. Mesin Robot Drawing Hybrid Laser sangat membantu dalam membuat penggambaran pola dan pengenalan pola. Adapun beberapa hardware-nya yaitu Arduino Uno, CNC Shield v3, DRV8825, Motor Stepper Nema 17, dan komponen mekaniknya. Dan untuk permodelannya 2 in 1 bisa digunakan keduanya dengan satu Mesin. Mesin Robot Drawing Hybrid Laser ini termasuk mesin CNC, karena dalam pengoperasiannya menggunakan kode-kode NC. Kode tersebut didapat dari gambar yang telah diterjemahkan menggunakan aplikasi Laser GRBL. Penelitian ini bertujuan untuk mengetahui bahan material yang digunakan untuk komponen Mesin Robot Drawing Hybrid Laser, ketika mesin beroperasi pasti ada bagian komponen yang mengalami kerusakan dan penulis memberi solusi dengan membuat komponen yang rusak tersebut dengan bahan lain. Material yang digunakan untuk poros rail berupa stainless steel, puli menggunakan bahan alumunium, serta main frame, box transmission, bracket dan plotter menggunakan bahan plastik filamen PLA (Polylactid Acid). Bahan-bahan yang digunakan untuk komponen mekanik disesuaikan dengan kebutuhan rancang bangun, komponen yang terjadi kerusakan adalah plotter dengan bahan plastik PLA karena saat terjadi gaya sebesar 20 Newton komponen tersebut akan patah. Dan bahan plotter berupa plastik PLA dan PETG tidak mempengaruhi hasil gambar atau pola yang dikerjakan.
ANALISIS KEAUSAN SPROKET PADA SEPEDA MOTOR SPORT 4 LANGKAH 150 CC
Authors: Iskandar Ahmad , Johansyah Mochamad
Published: January 2022

Sproket rantai rol pada sepeda motor merupakan komponen yang sangat penting, komponen ini berfungsi untuk mentransmisikan daya dari mesin penggerak ke roda belakang. Dalam pengoperasiannya komponen sproket selalu bergesekan dengan rantai dari sepeda motor, dari gesekan tersebut yang akan menyebabkan keausan dan berkurangnya umur pakai.  Jenis keausan yang terjadi pada komponen sproket yaitu keausan adhesi dan abrasi, sedangkan untuk umur pakai sendiri dari komponen sproket yang diteliti telah mengalami pemakaian selama 420 hari atau 30.738.960siklus. Untuk umur pakai sproket sampai kondisi harus diganti, pemakaian selama 4,1 tahun atau 105,742,022,4 siklus. Komponen sproket sendiri sebelumnya telah dilakukan proses pengerasan permukaan, dengan metoda induksi. Dari hasil pengujian kekerasan dapat dilihat penurunan harga kekerasan dari permukaan ke bagian dalam. Strktur mikro yang terbentuk pada daerah permukaan yang dikeraskan terbentuk fasa martensit dan ferrite, sedangkan untuk daerah yang potongan melintang memiliki martensit austenit, perit (hitam) dan pearlite. Komponen sproket termasuk ke dalam baja karbon medium, sesuai dengan AISI 1040.
Transmisi Model Matematika dalam Berbagai Profesi Kepada Guru Matematika SMA di Sumatera Barat
Authors: Bahri Susila , Sy Syafrizal , Baqi Ahmad Iqbal , Lestari Riri , Husna Radhiatul
Published: January 2022

The knowledge and insight of teachers about the use of mathematical material taught to their students at school are minimal. Therefore, it is necessary to transmit the application of mathematical models to each mathematical material discussed in school learning. Transmission through this community service webinar presents several applicable cases or problems directly practiced by various professions such as police, doctors, company managers, area planner, programmers, and demographics. Indirectly, this transmission also aims to make students aware of the importance of mathematics in the world of work (profession) which is their goal in the future. From the results of direct interviews with high school mathematics teachers at the webinar, the service team can conclude that this webinar is beneficial in increasing their knowledge and insight so that this service can be sustainable in the future.
Workshop Media Pembelajaran Kewirausahaan Bagi Guru SMA dan SMK di Kota Palembang
Authors: Pratiwi Nova , Lestari Neta Dian , Rachmawati Diana Widhi , Gunawan Hendri , Januardi Januardi , Kurniawan Chandra , Masnunah Masnunah , Yusmiono Boby Agus
Published: January 2022

This Community Service activity aims to provide insight to teachers and students about the use of a variety of learning media which is an important skill of a teacher in learning activities in the classroom. This community service is carried out virtually through the Zoom meeting application with the presentation method and open discussion. Participants in this activity were 20 teachers from high schools (SMA) and vocational high schools (SMK) in Palembang City and students of the Accounting education program at PGRI Palembang University. The results of the workshop activities carried out, participants gained insight into the variety of learning media that can be applied to optimize entrepreneurship learning activities in the classroom. Through open discussions, participants had the opportunity to share their views on the paradigm shift in education thanks to the development of information technology that accelerates the flow of knowledge, as well as how to optimize the quality of learning by utilizing information technology.
Pemeriksaan Proses Pengolahan Air Minum Isi Ulang terhadap Jumlah Bakteri dan Pengujian Bakteriologi di Depot Tiban Kota Batam
Authors: Soryatmodjo Deny
Published: January 2022

Water is something important in life. Humans, animals and plants cannot continue their life without water. This service aims to determine the quality of Refill Drinking Water Bacteriologically according to the Regulation of the Minister of Health of the Republic of Indonesia Number 492/MENKES/PER/IV/2010. The samples used two Depots A and B refilled drinking water, each water sample was taken in three processing sections, namely raw water, water after passing through the filter cartridge, and water after passing through Ultraviolet. The method used is Total Plate Number and Most Probable Number using 3 tubes. The results of the Bacteriological Examination of the Refill Drinking Water Examination showed a decrease in the number of bacteria in the Refill Drinking Water treatment, and the Most Probable Number (MPN) of Escherichia Coli. This indicates that the refill drinking water at the two depots was not found to have bacteriological contamination. One of the efforts to prevent microbiological pollution is to always carry out maintenance, use standard equipment, and select good raw water, in order to maintain product quality so that it does not endanger consumers or the surrounding community.
Pelatihan Pengembangan Pembelajaran Berorientasi Higher Order Thinking Skills (HOTS) Bagi Guru Sekolah Dasar
Authors: Wicaksono Alam , Irianti Nathasa
Published: January 2022

This activity aims to improve the skills development of elementary school teachers. HOTS based training. This event will be held in the form of an online workshop for two people. Activities, theory and practice sections. Delivery-Understanding the Importance of Developing HOTS for students to improve the quality of learning in schools Basic learning preparation strategies centered on HOTS according to learning methods HOTS and HOTS based learning assessments. Practice by composing. HOTS-centered learning based on the basic talents of every elementary school student. As a result, most of the participants were able to develop HOTS-based learning. Based on the results of product research One of the skills that need to be improved by the participants is skill development. productive question The method used is presentation and discussion which results in 19 teachers being able to apply the six competency skills in designing HOTS-based learning.
Pemanfaatan Jamur Tiram untuk Kebutuhan Pangan sebagai Kearifan Lokal Masyarakat Perkotaan
Authors: Sakir Icuk Muhammad , Prihatini Lishapsari , Pusnita Indah , Larasaty Asi
Published: January 2022

This service aims to determine the use of oyster mushrooms for food needs as local wisdom for urban communities. The method used with an ethnographic approach is to describe in detail the oyster mushroom cultivation technique for the community in Kalidoni District, Palembang City. The process of cultivating oyster mushrooms from start to harvest takes about one month. Baglog from sawdust used can last for 7 months, then it must be replaced with new planting media. The time interval for the first harvest and the next harvest takes 2-3 days. Mushroom yields will be maximized if you regularly water three times in one day. Production of oyster mushrooms for one baglog media, can produce 0.5 kg to 1 kg of mushrooms. The mushroom harvesting system is carried out from the base of the stem because the remaining stems can rot. Harvesting is done every day or every few days depending on the distance from which the polybags are opened. The one baglog produces about 1 kg of mushrooms at a price of Rp.25,000 to Rp.30,000/kg.
Sinergi Akuntan Milenial dan Petani Milenial di Era Ekonomi Digital
Authors: Surepno Surepno , Anam Chairul
Published: January 2022

The university has a role in community service through providing empowerment assistance, training, counseling, mentoring, mentoring and to realize their potential, as well as helping to improve the quality of life and development. Based on the problems faced in the current digital era, in the context of the community service program, we have held a webinar with the theme of the synergy of millennial accountants and millennial farmers in the digital era. The method of implementing Service Activities is to use virtual meeting media by educating young accountants and practitioners in the agricultural sector. In this activity, it can be concluded that the existence of village funds distributed to the community creates an opportunity for young accountants to synergize with farmers in increasing economic value by providing education about the importance of capital management in accordance with the principles in accounting. The activity went well and smoothly, although there were also a few obstacles because there were several unsupportive factors such as the limited frequency of the internet signal, but overall the service ran smoothly.
Pemanfaatan Sampah Anorganik Sebagai Produk Ecobrick dalam Menanggulangi Sampah di Desa Ketimang
Authors: Puriana Ramadhany Hananto , Adella Putri Dinda Mayang , Maharani Reza Sastra , Nursyam Dio Maulana , Nisa Khoirun , Lubis Nabila Rahma
Published: January 2022

The problem of waste, especially inorganic waste is a problem that is still crucial in society. The increasing population every year results in an increase in the volume of waste. Lack of socialization regarding the utilization and utilization of waste has a negative impact on the environment and public health. Ecobrick is a waste management activity, especially inorganic waste by putting inorganic waste into plastic bottles. This service activity was carried out in Ketimang Village, Wonoayu District, Sidoarjo Regency. The goal is to educate the people of Ketimang Village about how to manage plastic waste so that it can reduce the amount of daily waste in the Ketimang Village environment. The method used is the socialization of organic and inorganic waste and waste management into Ecobrick. This Ecobrick activity produces a product, namely flower pots from inorganic waste. The response of the community, especially the youth organizations who were participants in the activity, was very enthusiastic during the implementation of the Ecobrick activity.
Penggunaan Geogebra dalam Geometri Ruang
Authors: Zulhendri Zulhendri , Joni Joni
Published: January 2022

The rapid development of technology opens up new opportunities and ways in doing many things, including to develop the world of education. One of the learning media that is currently developing so rapidly is a computer with various relevant programs. One of the computer programs that can be used as a medium for learning mathematics is the Geogebra program. The purpose of this community service is to find out the use of Geogabra in geometric geometry at Sei Putih High School, Kampar Riau Regency. The methods that will be used in this activity are direct observation, interviews, presentations, and questions and answers. The results of this service activity received a positive response from the partner schools and the teachers participating in the workshop. This can be seen from the enthusiasm of the training participants and the seriousness of the participants during the activity. The participants hoped for further training so that the competence of the Sei Putih High School mathematics teacher in learning using Geogebra would increase.