bluuebunny/crossref_metadata_2025_split huggingface dataset:
OPTIMASI KOORDINASI OVER CURRENT RELAY PADA TRAFO 60 MVA 150/20 KV DAN PENYULANG 20 KV GUMUL GARDU INDUK BANARAN BERBASIS PARTICLE SWARM OPTIMIZATION
Authors: Setyaningrum Yulia , Prasetyono Suprihadi , Setiawan Andi 
Published: April 2022

Abstract
At Banaran Transformer Substation 60 MVA 150/20 kV, the problem that often occurs is a short circuit fault. Short circuit fault sometimes causes the 20 kV Gumul Feeder to go out, so that the incoming safety of the 60 MVA transformer is also affected. This is because the coordination of the relay between the 20 kV Gumul feeder OCR and the 60 MVA incoming transformer OCR is less selective in isolating the disturbance which causes the relays not to overlap (not overlap). Therefore, to improve the performance of OCR coordination, it is necessary to set optimal OCR using the PSO method. The results of this study indicate the value of the OCR setting on the feeder side using PSO produces a TMS of 0.1197 s
with a relay operating time of 0.2471 s faster than the conventional results obtained by a TMS of 0.1453 s with a relay operating time of 0.300 s. So that the results of the PSO resulted in an increasing CTI of 0.3529 s, while the results from the conventional method obtained a CTI of 0.300 s. Based on these results it can be concluded that the coordination of the relay between the 20 kV Gumul Feeder OCR and the 60 MVA incoming transformer OCR can work quite selectively by isolating the disturbance appropriately.

Keywords — Coordination, Short Circuit, OCR, PSO, TMS
DESAIN SPWM SINGLE PHASE FULL BRIDGE INVERTER PADA SISTEM UNINTERRUPTIBLE POWER SUPPLY 500W
Authors: Ferdiansyah Indra , Sudiharto Indhana , Sunarno Epyk , Muhammad Mahbub Gusti 
Published: April 2022

Indonesia has sufficient power resources provided by PLN. However, blackouts still occur frequently due to several reasons, such as disruption in transmission and distribution, especially when the weather is raining. This has an impact on customer inconvenience. To overcome this, several houses have used a backup power source in the form of a generator set that will be operated by a blackout. This solution turns out to cause noise that can interfere with user comfort. To increase user convenience, a system (Uninterruptible Power Supply) is proposed. The system there is a voltage sensor to detect a power outage. In addition, there is an SSR switch so that it can to switch main source to the UPS with a fast response time during a blackout. The inverter on UPS system uses the SPWM technique to produce a sine wave output, then the use of an LC filter to reduce ripple on the system. PID-based voltage control is used to maintain the output inverter by the setting value of magnitude amplitude. Based on the results of the test, the UPS can work during a blackout with a maximum power of 500W and the voltage constant at 215V.

Keywords — Blackout, PI Controller , SPWM, UPS.
Maternal and perinatal outcomes of pre-referral magnesium sulfate treatment in severe preeclampsia patients
Authors: Sari Rizki Amalia , Sulistiawati Sulistiawati , Ernawati Ernawati 
Published: April 2022

HIGHLIGHTS
1. Consumption of magnesium sulfate is recommended for prevention against eclampsia. 2. Magnesium sulfate administration to preeclamptic mothers is effective in reducing the risk of eclampsia.3. Pre-referral magnesium sulfate administration and maternal and perinatal outcomes in severe preeclampsia patients was analyzed.4. Magnesium sulfate did reduce eclampsia risk, but not ICU and NICU care rates, maternal mortality, perinatal asphyxia, and perinatal mortality.

ABSTRACT
Objectives: This study analyzed the association between pre- referral magnesium sulfate administration and maternal and perinatal outcomes in severe preeclampsia patients.
Materials and Methods: This was a retrospective observational analytic study using cross-sectional design. Samples were 132 pregnant women with preeclampsia referred to dr. Saiful Anwar, Hospital Malang, Indonesia in 2019. Data were taken from the patients’ medical records. Maternal outcomes measured in this study were the incidence of eclampsia, ICU care, and maternal mortality, while the perinatal outcomes included the incidence of asphyxia, NICU care, and perinatal mortality.
Results: Patients’ history of magnesium sulphate administration significantly associated with the incidence of eclampsia with p-value 0.035 and odds ratio (OR) 2.413, thus consumption of magnesium sulphate could reduce the risk of seizures. However, it did not associate with either maternal ICU care outcomes (p-value 0.087, OR 2.028), or maternal mortality (p-value 0.573). No relationship was found neither between history of magnesium sulphate administration in pregnant women with severe preeclampsia and perinatal outcomes nor with the incidence of asphyxia (p-value 0. 577, OR 0.795), with NICU treatment (p-value 0.205, OR 0.579), and with perinatal mortality (p-value 0.153, OR 3.259).
Conclusion: Magnesium sulfate reduced the risk of eclampsia, yet it did not affect either the rate of ICU care, maternal mortality, incidence rate of perinatal asphyxia, the rate of NICU care, or perinatal mortality.
The Impact Of The COVID-19 Lockdown On The Severity Of Pediatric Traumas
Authors: GÜN Eren Görkem , NARSAT Mehmet Ali , YILDIZ Eren 
Published: April 2022

Aim: We aimed to evaluate the results of COVID-19 lockdown in terms of child traumas and to reveal the change in the characteristics and severity of traumas by comparing the lockdown period with the same period one year ago.
Material and Method: The records of pediatric trauma patients at department of Kastamonu Training and Research Hospital were assessed retrospectively. The data of all pediatric traumas between the specified dates were reached and the sample of the study was determined as 1970 patients. Descriptive characteristics of patients and trauma events were determined. Patient data were re-assessed, and Pediatric Trauma Scores, and Pediatric Glasgow Coma Scale values, and Injury Severity Scores were calculated.
Results: Of the patients, 1637 (83.1%) had admitted before the lockdown and 333 admitted during the lockdown period. It was found that the school-age children constituted the group with the most prevalent trauma patients in both periods with a rate of 76.2% before the lockdown and 49.8% in the lockdown period. It was found that the measure of lockdown reduced the rate of outdoor trauma cases from 63.2% to 43.2% (p < 0.001). Whereas a statistically significant decrease was determined in the mean scores of the Pediatric Trauma Score and the Pediatric Glasgow Coma Scale, no difference was determined in the Injury Severity Score.
Conclusion: It is seen that the COVID-19 pandemic and its restrictions, which change our normal life in every aspect, also have effects on pediatric traumas. It is noticed from our study that thanks to the lockdown, not only the number of traumas but also the severe traumas and mortality decreased.
Ulusal ve uluslararası katılımlı halk sağlığı kongrelerinde sunulan bildirilerin yayına dönüşme oranları
Authors: KÖKSOY VAYISOĞLU Sümbüle 
Published: April 2022

Bu çalışmanın amacı 2017 yılındaki 19. Ulusal ve 2018 yılındaki 2. Uluslararası 20. Ulusal Halk Sağlığı Kongresinde sunulan bildirilerin yayına dönüşme oranlarının belirlenmesidir. Tanımlayıcı türdeki bu araştırmanın verileri; bildiri türü (sözel, poster), araştırma türü, yazar sayısı, araştırma ekibi, yayın olma durumu, yayınlandığı indeks ve yayın için geçen sürenin yer aldığı veri toplama formu ile Halk Sağlığı Uzmanları Derneği’nin resmi internet sayfasında bulunan elektronik bildiri kitapçıklarından ve PubMed, Google Scholar, Türk Medline ve Ulakbim veri tabanı arama motorlarından 01-30 Eylül 2020 tarihleri arasında toplandı. Araştırmanın verileri tanımlayıcı istatistiklerle, ki kare ve T testi ile değerlendirildi. p&lt;0.05 anlamlı kabul edildi. Her iki kongreden toplam 818 bildiri değerlendirilmiş olup (sözel %41; poster %59) uluslararası kongredeki sözlü bildiri sayısı (n:274, %61.9) ulusal kongredekinden (n:61, %16.3) anlamlı şekilde fazlaydı (p&lt;0,001). Tüm bildirilerin %97.7’si orijinal araştırma, %2.3’i derleme ve metaanaliz, %46.7’si iki-üç yazarlı ve %75.1’i hekimler, %10.4’ü hemşire/ebeler tarafından sunulmuştu. Toplam 818 bildirinin %11.2’si yayın olurken bu oran, uluslararası kongre de %9.5, ulusal kongrede ise %13.3 idi ve aralarında fark yoktu (p:0.082). Yayına dönüşen bildirilerin %64.1’i ulusal indeksli bir dergide, %12’si ise SCI/SCI-E/SSCI tarafından taranan dergilerde yayınlanmıştı. Ulusal ve uluslararası kongrede yayın olan bildirilerin sunu türü ve yayın olma süresi farklıydı (p&lt;0.001). Sonuç olarak bildirilerin yayına dönüşme oranları düşük olup, bildirilerin yayınlanmasını teşvik edici mekanizmaların/politikaların geliştirilmesi önerilir
Determination of Natural Radioactivity Level on Soil and Radiological Hazards in The Geotermal Area of Solok South, West Sumatera
Authors: Sabila Nurul Khaira , Syifa Dinda Nurul , Alhafiz Mohammad Randy 
Published: April 2022

Solok Selatan is one of the areas in West Sumatra that has geothermal potential, contains much higher levels of radioactive substances in the soil in the form of Radium (Ra-226), Thorium (Th-232), and Potassium (K-40). This study aimed to measure the concentration of Ra-226. Th-232, and K-40 contained in the soil in the Solok Selatan which was then reviewed based on PERKA BAPETEN No. 9 of 2009 and UNSCEAR 2000, also evaluates the average radium equivalent activity (Raeq), representative level index (Iyr), external hazard index (Hex). Soil samples were collected from seven different locations. The radionuclide activity concentration was measured by using a gamma spectrometer in the PTKMR BATAN laboratory, with the results of the average radionuclide measurement Ra-226 being 28.58 Bq/kg, Th-232 was 44.74 Bq/kg and K-40 at 323.29 Bq/kg. For the average value of Raeq is 118,051 Bq/kg, Iyr is 0.853 and Hex is 0.335. Based on BAPETEN PERKA No. 9 of 2009 and UNSCEAR 2000, the radionuclide activity concentration was found still within safe limits. It does not pose a health hazard to the people living in the area.
Correction of Air Buoyancy on E0-74 Mass Measurement with Pt-Ir K-112 Standard
Authors: Ismail Zuhdi , Kresiani Renanta Hayu 
Published: April 2022

Determination of the mass value of E<sub>0</sub> no 74 by calibrating it using the Pt-Ir standard has high complexity. This is caused by a significant difference in the density of standards. In this study, the E<sub>0</sub> no 74 made of stainless steel has a density of 8.051.130 kg.m<sup>−3</sup> calibrated by a mass standard of Pt-Ir which has a density of 21.552.940 kg.m<sup>−3</sup>. <em>By</em> Archimedes' law, the buoyant force generated by the air due to this density difference is huge. Therefore, the correction of air buoyancy is very important. The air buoyancy correction value is obtained by determining the air density using the CIPM-2007 formula. The correction that arises due to air buoyancy while weighing in the air is<em> </em>-0.00115 g and is greater at higher density. The implication of buoyancy correction is identified by analyzing the equivalence of the measurement result using a reference value from <em>the </em>calibration certificate issued by BIPM. The measurement result is equivalent if -1&lt;En&lt;1. The value for the corrected mass is -0.078.
Perovskite Manganit Analysis Based on La0.7Ca0.3Mn1-xTixO3 (x=0, 0.1, 0.2, and 0.3) as Potential Microwave Absorber Material with Sol-Gel Method
Authors: Rizky Fira , Saptari Sitti Ahmiatri , Tjahjono Arif , Khaerudini Deni Shidqi 
Published: April 2022

<p>Electromagnetic wave is an energy flow in the form of electric and magnetic field as the technology development causes electromagnetic wave exposure level changes significantly and resulting an electromagnetic wave radiation that leads bad impacts on human health. In this case, manganite perovskite became an interesting topic of study that aims to produce material engineering to obtain a material with the best property as absorber. This study is based on lanthanum manganite La<sub>0.7</sub>Ca<sub>0.3</sub>Mn<sub>1-x</sub>Ti<sub>x</sub>O<sub>3</sub> ( and ) using sol-gel method with the with a heating temperature in the oven of 200<sup>o</sup>C for 2 hours, calcination temperature of 600<sup>o</sup>C for 6 hours, and sintering temperature of 1000<sup>o</sup>C for 12 hours. The sample is characterized using X-Ray Diffraction (XRD) that shows the sample had succeeded to form single phase and had crystal cubic structure with space group p m -3 m, the substitution of Ti<sup>3+</sup>ions did not cause the structural changes, but it was marked with the changes of lattice parameter, unit cell volume and average crystallite size. Meanwhile Vector Network Analyzer (VNA) on the frequency range 8-12 GHz shows that the sample has ability to absorb microwave until 90.16% on 10.4 GHz frequency. Therefore, the material based on lanthanum manganite La<sub>0.7</sub>Ca<sub>0.3</sub>Mn<sub>1-x</sub>Ti<sub>x</sub>O<sub>3</sub>has the potential as the microwave absorber material.</p>
Mechanical Properties and Damage Characteristics of Coal Samples under Water Immersion Pressure
Authors: Yin Dawei , Ding Yisong , Jiang Ning , Li Faxin , Zhang Jicheng , Xu Hanhua 
Published: April 2022

Abstract
Uniaxial compression tests were conducted on four groups of coal samples under dry condition and 0, 3, and 5 MPa water immersion pressure using acoustic emission, scanning electron microscopy, and a digital scattered spot deformation monitoring system to investigate the mechanical properties and damage characteristics of coal samples under the action of water pressure. The results showed that as the water immersion pressure increased, the water–rock interaction intensified and aggravated the internal damage of the samples. The uniaxial compressive strength, elastic modulus, and peak strain decreased by 71.4%, 43.3%, and 34.74%, respectively. The deformation localized zone of the samples first appeared at the original crack in the deformation and failure process. As the water immersion pressure increased, the coal sample deformation localization zone appeared earlier, the displacement dislocation momentum of the deformation localization zone increased, and the deformation failure gradually increased, furthermore, the samples transitioned from brittle to plastic failure, and their failure mode changed from tensile to tensile–shear hybrid failure. The acoustic emission activity of the samples corresponds to their failure processes. The initial compaction stage of the samples was prolonged as the water immersion pressure increased. In the stage before the peak point, the plastic damage to the samples caused a gradual increase in the intensity and frequency of the acoustic emission signal, and multiple sudden increase points appeared. After the peak point, the active degree of the acoustic emission decreased, and the signal changed from “single tremors” to “swarm tremors” type fluctuation. The water immersion pressure promoted the water–rock interaction in the samples, the water flow continuously eroded the samples, and many water marks appeared on the fracture surface. The average porosity of the fracture surface increased, and the defect size of the coal samples increased.
In situ Hi-C for mosquito embryos
Authors: Lukyanchikova Varvara , Fishman Veniamin , Sharakhov Igor 
Published: April 2022

Abstract
The step-by-step Hi-C protocol is described for mosquito embryos at the 15-18 h developmental stage. In brief, we collect mosquito eggs, fix them with 3% formaldehyde, and prepare Hi-C libraries using nuclei isolated from ~1000-3000 embryos of mixed sexes. We use MboI restriction enzyme and T4-ligase to generate two biological replicates per species. Libraries can be prepared with NEBNext® Ultra™ II DNA Library Prep Kit for Illumina. The protocol was adapted for Anopheles species and successfully verified for Culex and Aedes embryos.
Surgical Treatment of Papillary Fibroelastoma of the Pulmonary Valve: a case report
Authors: Uehara Hiroo , Uchiyama Masateru , Hori Takayuki , Iida Mitsuru , Imazuru Tomohiro , Shimokawa Tomoki 
Published: April 2022

Abstract
Background: Cardiac papillary fibroelastoma (PFE) is a rare tumor, and especially rare when found on the pulmonary valve.Case presentation: We report the case of a 70-year-old woman patient with a pulmonary valve PFE diagnosed incidentally during a follow-up of aortic regurgitation. Computed tomography, magnetic resonance imaging, and Gallium-67 scintigraphy imaging showed no findings of malignant tumors, and thrombus or myxoma was initially suspected. However, an initial transthoracic and transesophageal echocardiogram did not exclude the possibility of a malignant tumor attached to the wall of the pulmonary artery. Considering the embolization risk, we opted to perform aortic valve replacement (AVR) and tumorectomy, in which additional surgical procedures could then be conducted if intraoperative diagnosis showed a malignant tumor. Indeed, intraoperative findings showed the tumoral mass attached on the left semilunar cusp of the pulmonary valve, and intraoperative diagnosis of the tumor showed no malignancy. Planned tumorectomy was performed concomitantly with AVR. The pathologic examination of the removed tumor confirmed the diagnosis of PFE. Her postoperative course was uneventful without any sign of recurrence.Conclusion: This case highlights the difficulty of accurate diagnostic imaging and provides valuable insight into a successful surgical treatment of pulmonary valve PFE without any complications.
Commentary on Pore Water Pressure Predictive Models for Cyclic Loading
Authors: Phakde Arun G. , . Anubhav , Basudhar P.K. 
Published: April 2022

Abstract
The paper pertains to a comparative study of the efficacy of three predictive models for progressive build-up of pore water pressure during cyclic loading. The equivalent cycle method using a standard weighting function, modified equivalent cycle method and experiment based model were used for assessing the generation of pore water pressure values during cyclic loading. Various cyclic loading patterns, such as, uniform sinusoidal, non-uniformly increasing, exponentially decreasing, wavy irregular artificial shear stress histories were used for computation of progressive built-up of pore water pressures using above predictive models. Use of the standard weighting factor curve for equivalent cycle method provides a very rough and approximate estimation of the values of the progressive built up pore water pressure. Therefore, a new weighting curve for Ottawa sand has been developed and presented in this article. The predicted values implementing the newly developed approach show very good agreement with experimental results.
Self-organisation of zooplankton communities produces similar food chain lengths throughout the ocean
Authors: Everett Jason , Heneghan Ryan , Blanchard Julia , Suthers Iain , Pakhomov Evgeny , Sykes Patrick , Schoeman David , Baird Mark , Basedow Sünnje Linnéa , Błachowiak-Samołyk Katarzyna , Heath Michael , Hopcroft Russell , Huggett Jenny , Huret Martin , Kimmel David , Labat Jean-Philippe , Lopes Rubens , Marcolin Catarina , Nogueira Enrique , Noyon Margaux , Schultes Sabine , Sourisseau Marc , Swadling Kerrie , Trudnowska Emilia , Richardson Anthony 
Published: April 2022

Abstract
For over 50 years, the conceptualisation of low-nutrient oligotrophic systems having longer food chains and thus lower energy transfer to fish than their high-nutrient eutrophic counterparts1 has achieved the status of an ecological paradigm. However, recent global assessments indicate global fish biomass could be much higher than previously thought2–4, suggesting that our traditional understanding of food webs may need to be revisited. Here, we challenge the classical paradigm by exploring the role of zooplankton in food webs across the world’s oceans. Using observed zooplankton size spectra, and output from a size-spectrum model that resolves nine zooplankton groups, we conclude that food chains in oligotrophic (low-nutrient) and eutrophic (high-nutrient) systems have similar lengths. We offer a compelling hypothesis to explain this emergent pattern: self-organisation of zooplankton groups across the global productivity gradient regulates food chain length. We find that in oligotrophic systems the increased carnivory and longer food chains are offset by relatively large gelatinous filter feeders eating the dominant small phytoplankton, resulting in shorter-than-expected food chains, but decreasing food quality for fish. Our findings highlight the pivotal role zooplankton play in regulating energy transfer. Better resolution of zooplankton groups, their feeding relationships and carbon content in models will increase our ability to estimate current global fish biomass 5, project future fish biomass under climate change6–8, and provide more-robust forecasts of nutrient9 and carbon cycling10.
Performance of Ag Nanoparticles At The Rear Surface of Thin Film Silicon Solar Cell To Enhance The Overall Photon Absorption
Authors: Islam Ariful 
Published: April 2022

Abstract
This work provides an designing layout for the back surface of a thin film silicon solar cell (TFSC) to improve the cell's overall phton absorption. We modelled the back surface of the thin film silicon solar cell with an a Ag nanoparticle array and observed the result via the Finite Difference Time Domain (FDTD) method taking consideration of the wavelength in the range of 400 to 1100 nm. We demonstrated that the structural parameters of nanoparticles (particle shape, particle radius, and interparticle spacing) must be properly configured to strongly scatter back longer wavelength light into silicon absorber layer, and we found that larger particle size and smaller interparticle spacing provide optimum light trapping due to substantial scattering cross section and extensive light coupling induced by near-field effect. A detailed analysis has done and the result is compared with the commonly available cell without placing the nanoparticles. Simulation result shows that our designed structure boost light absorption significantly compared to the traditional cell.