bluuebunny/crossref_metadata_2025_split huggingface dataset:
Searching for water ice in the coma of interstellar object 2I/Borisov
Authors: Yang Bin , Kelley Michael S. P. , Meech Karen J. , Keane Jacqueline V. , Protopapa Silvia , Bus Schelte J. 
Published: January 2020

Aims.Interstellar objects passing through our Solar System offer a rare opportunity to probe the physical and chemical processes involved in solid body and planet formation in extrasolar systems. The main objective of our study is to search for diagnostic absorption features of water ice in the near-infrared (NIR) spectrum of the second interstellar object 2I/2019 Q4 (Borisov) and compare its ice features to those of the Solar System icy objects.Methods.We observed 2I in the NIR on three separate occasions. The first observation was made on 2019 September 19 UT using the SpeX spectrograph at the 3m IRTF and again on September 24 UT with the GNIRS spectrograph at the 8m GEMINI telescope; the last observation was made on October 09 UT with IRTF.Results.The spectra obtained from all three nights appear featureless. No absorption features associated with water ice are detected. Spectral modeling suggests that water grains, if present, comprise no more than 10% of the coma cross section. The comet consistently exhibits a red D-type like spectrum with a spectral slope of about 6% per 1000 Å, which is similar to that of 1I/’Oumuamua and is comparable to Solar System comets.
Personalakquise für Führungskräfte im OP
Authors: Brügger Christine , Schwab Gisela 
Published: January 2020

ZusammenfassungWie rekrutiert man Führungskräfte für den OP? Das haben wir die Personalberaterin Christine Brügger gefragt, die sich auf den Bereich Pflegemanagement spezialisiert hat.
Phenylpropanoid and Iridoid Glucosides from the Whole Plant of Hemiphragma heterophyllum and Their alpha-Glucosidase Inhibitory Activities
Authors: Li Yan-Hong , Dai Jia-Meng , Yang Cui , Jiang Meng-Yuan , Xiong Yong , Li Yu-Kui , Li Hong-Rui , Tian Kai , Huang Xiang-Zhong 
Published: January 2020

AbstractThree phenylpropanoid glucosides (1 – 3) and one iridoid glucoside (11), together with eleven known glucosides, were isolated from the ethanol extract of the whole plant of Hemiphragma heterophyllum. Their structures were elucidated by means of 1D and 2D NMR spectroscopy, HRMS, and chemical methods. All compounds except 11 and 13 – 15 showed varying degrees of α-glucosidase inhibitory activity. Compounds 5, 9, and 12 were marginally active in the bioassay, while compounds 1 – 4, 6 – 8, and 10 exhibited appreciable inhibitory activity with an IC50 value of 33.6 ~ 83.1 µM, which was much lower than that of the positive control acarbose (IC50 = 310.8 µM).
Paralisia obstétrica: De quem é a culpa? Uma revisão sistemática de literatura
Authors: Galbiatti José Antonio , Cardoso Fabrício Luz , Galbiatti Marília Gabriela Palacio 
Published: January 2020

ResumoA paralisia obstétrica é classicamente definida como a lesão do plexo braquial decorrente da distócia de ombros ou das manobras executadas no parto difícil. Nas 2 últimas décadas, vários estudos comprovaram que metade dos casos de paralisia obstétrica não estão associados à distócia de ombros e levantaram outras possíveis etiologias para a paralisia obstétrica. O objetivo do presente trabalho é colher dados da literatura de revisão, artigos clássicos, sentinelas e da medicina baseada em evidências para compreender melhor os eventos envolvidos na ocorrência de paralisia obstétrica. Foi realizada uma revisão da literatura no motor de busca da PubMed (MeSH - Medical Subject Headings) com as seguintes palavras-chave: shoulder dystocia and obstetric palsy, completamente aberto, sem limites de língua ou data. Posteriormente, definimos como critério de inclusão artigos de revisão. Encontramos 21 artigos de revisão com associação dos temas descritos até 8 de março de 2018. Frente às melhores evidências existentes até o momento, está bem demonstrado que a paralisia obstétrica ocorre em partos não complicados e em partos cesáreos, e são múltiplos os fatores que podem causá-la, relativizando a responsabilidade de médicos obstetras, enfermeiras e parteiras. Procuramos, com o presente estudo, quebrar os paradigmas de que paralisia obstétrica se associa obrigatoriamente à distócia de ombros e que a sua ocorrência necessariamente implica em negligência, imperícia ou imprudência da equipe envolvida.
Descontaminação transoperatória de enxerto durante cirurgia de reconstrução do LCA
Authors: Luciano Roberto Cunha , Macedo Ígor Severino , Pereira Rafael Henrique Naves , Pereira Daniel Barros , Luciano Dyego Vilela 
Published: January 2020

ResumoObjetivo Avaliar diferentes descontaminantes para enxertos de tendões, propondo um protocolo de antissepsia para o enxerto contaminado.Métodos Um total de 25 pacientes foram doadores de tecido para o estudo. Cada participante doou uma amostra de 2,5 cm de tendão, a qual foi dividida em 5 fragmentos de 5 mm durante cirurgia de reconstrução do ligamento cruzado anterior (LCA). O material coletado foi dividido em 5 grupos, totalizando 125 amostras. Ao todo, quatro fragmentos de cada paciente foram colocados sobre o piso da sala cirúrgica, durante um minuto, para contaminação, simulando a queda do enxerto no chão durante o ato operatório. O outro fragmento foi, imediatamente, colocado em um recipiente esterilizado (grupo 1). Um dos fragmentos contaminados foi colocado no recipiente esterilizado sem ser previamente imerso em solução descontaminante (grupo 2). Os demais fragmentos foram imersos, por dez minutos, em solução descontaminante: clorexidina 0,5% (grupo 3), soro fisiológico 0,9% (grupo 4) e ortoftaldeído 0,55% (grupo 5), e, após esse tempo, foram colocados individualmente em um recipiente esterilizado. As amostras dos 5 grupos foram submetidas a exame microbiológico.Resultados Houve detecção de bactérias em 26% do total de amostras nos testes microbiológicos, sendo que no grupo 1 não houve crescimento de micro-organismos. No grupo 2, observou-se crescimento bacteriano em 16 amostras. Avaliando-se os grupos de teste 3, 4 e 5, o percentual de descontaminação foi superior ao crescimento de micro-organismos nas respectivas culturas.Conclusão O protocolo sugerido pelo estudo mostrou que é possível a descontaminação transoperatória do enxerto.
A Simple Onlay Sellar Reconstruction Does Not Increase the Risk of Postoperative Cerebrospinal Fluid Leak in Well-Selected Patients
Authors: Chaskes Mark B. , Fastenberg Judd H. , Vimawala Swar , Nyquist Gurston F. , Rabinowitz Mindy R. , Chitguppi Chandala , Falls Meagan , Garzon-Muvdi Tomas , Rosen Marc R. , Evans James J. 
Published: January 2020

Abstract
Objective A variety of endonasal sellar repair techniques have been described; many of which are complex, expensive, and carry potential morbidity but are felt to be necessary to prevent postoperative cerebrospinal fluid (CSF) leaks. We propose an effective, technically simple repair for select sellar defects utilizing an onlay of regenerated oxidized cellulose.
Design Retrospective review of patients from a single neurosurgeon who underwent endoscopic transsphenoidal surgery for pituitary adenoma and sellar reconstruction with only an onlay of regenerated oxidized cellulose. Patients were selected for this repair technique based on the absence of: (1) intraoperative identification of a CSF leak, (2) patulous diaphragm (expanded diaphragm sella herniating to or through sellar floor defect), and (3) other prohibiting comorbidities.
Setting The present study was conducted at a tertiary care center.
Participants In this study, pituitary adenoma patients were the participants.
Outcome Measures Main outcome measure of the study is postoperative CSF leak.
Results A total of 172 patients were identified. Of these, 153 were initial resections of pituitary adenomas. Gross total resection was achieved in 142 (82.6%) cases. Average tumor size was 2.2 ± 1.1 cm. Average tumor volume was 10.4 ± 19.8 cm3. No patients had intraoperative CSF leaks. All cases were repaired with only an onlay of regenerated oxidized cellulose. There were two postoperative CSF leaks (1.16%). Pre and postoperative SNOT-22 scores were 12.9 ± 11.9 and 14.3 ± 14.9 (p = 0.796), respectively.
Conclusion The use of an onlay of regenerated oxidized cellulose alone is an effective repair technique for select sellar defects. This technique does not result in increased postoperative CSF leak rates and avoids the higher relative cost and potential morbidity associated with more complex, multilayered closures.
Skull Base Reconstruction with Multilayered Fascia Lata: A Single-Center 17 Years Experience
Authors: Ringel Barak , Abergel Avraham , Horowitz Gilad , Safadi Ahmad , Zaretski Arik , Yanko Ravit , Margalit Nevo , Fliss Dan M. 
Published: January 2020

Abstract
Objective Reconstruction after open surgery of anterior skull base lesions is challenging. The fascia lata graft is our workhorse for achieving dural sealing and preventing cerebrospinal fluid leak and meningitis. This study seeks to analyze the donor and recipient site complication rates after fascia lata reconstruction.
Methods This is a retrospective review of all open anterior skull base operations in which a double-layer fascia lata graft was used for the reconstruction of the defect from 2000 to 2016 at the Tel-Aviv Sourasky Medical Center, a tertiary referral center in Israel.
Results Of the 369 patients operated for skull base lesions, 119 underwent open anterior skull base surgery and were reconstructed with a fascia lata graft. The patients' mean age was 47.1 years, and 68 (57.1%) were males. The overall postoperative early and late donor site complication rates were 6.7% (n = 8) and 5.9% (n = 7), respectively. Multivariate analysis found minor comorbidities and persistent/recurrent disease as being predictors for early-term complications. The overall postoperative early central nervous system (CNS) complication rate was 21.8% (n = 26), while 12.6% (n = 15) of the patients had late postoperative CNS complications.
Conclusion Reconstruction of open anterior skull base lesions with fascia lata grafting is a safe procedure with acceptable complication and donor site morbidity rates.
Real-time imaging of infarction deterioration after ischemic stroke in rats using electrical impedance tomography
Authors: Cao Lu , Li Haoting , Fu Danchen , Liu Xuechao , Ma Hang , Xu Canhua , Dong Xiuzhen , Yang Bin , Fu Feng 
Published: January 2020

Abstract

Objective: This study investigated the feasibility of electrical impedance tomography (EIT) for monitoring the deterioration of ischemic lesion after the onset of stroke. Approach: Fifteen rats were randomly distributed into two groups: rats operated to establish a right middle cerebral artery occlusion (MCAO) (n  =  10), and sham-operated rats (n  =  5). Then, the operated rats were kept 2 h under anesthesia for EIT monitoring. Subsequently, descriptive statistical analysis was performed on whole-brain resistivity changes, and repeated-measures analysis of variance (ANOVA) on the average resistivity variation index. Additionally, pathological examinations were performed after 6 h of infarction. Main results: The results obtained showed that ischemic damage developed in the right corpus striatum of the rats with MCAO, whereas the brains of the sham group showed no anomalies. The descriptive statistical analysis revealed that the whole-brain resistivity changes after 30, 60, 90, and 120 min of infarction were 0.063  ±  0.038, 0.097  ±  0.046, 0.141  ±  0.062, and 0.204  ±  0.092 for the rats with MCAO and 0.029  ±  0.021, 0.002  ±  0.002, 0.017  ±  0.011, and  −0.001  ±  0.011 for the sham-operated rats, respectively. The repeated-measures ANOVA revealed that the right MCAO model resulted in a significant impedance increase in the right hemisphere, which continued to increase over time after infarction. Significance: The overall study results indicate that EIT facilitates monitoring of local impedance variations caused by MCAO and may be a solution for real-time monitoring of intracranial pathological changes in ischemic stroke patients.
Numerical and analytical investigations for the SOI LDMOS with alternated high-k dielectric and step doped silicon pillars*
Authors: Yao Jia-Fei , Guo Yu-Feng , Zhang Zhen-Yu , Yang Ke-Meng , Zhang Mao-Lin , Xia Tian 
Published: January 2020

Abstract
This paper presents a new silicon-on-insulator (SOI) lateral-double-diffused metal-oxide-semiconductor transistor (LDMOST) device with alternated high-k dielectric and step doped silicon pillars (HKSD device). Due to the modulation of step doping technology and high-k dielectric on the electric field and doped profile of each zone, the HKSD device shows a greater performance. The analytical models of the potential, electric field, optimal breakdown voltage, and optimal doped profile are derived. The analytical results and the simulated results are basically consistent, which confirms the proposed model suitable for the HKSD device. The potential and electric field modulation mechanism are investigated based on the simulation and analytical models. Furthermore, the influence of the parameters on the breakdown voltage (BV) and specific on-resistance (R
on, sp) are obtained. The results indicate that the HKSD device has a higher BV and lower R
on, sp compared to the SD device and HK device.
The implementation of blended learning in analog electronic learning
Authors: Dewantara D , Misbah M , Wati M 
Published: January 2020

Abstract
This study aims to analyze the quality of the implementation of blended learning in analog electronics learning in terms of aspects of student effectiveness and response. This research is descriptive analysis research. The subjects of this study were 44 students of physics education FKIP Lambung Mangkurat University. The effectiveness of the implementation of blended learning is viewed from the results of student cognitive learning, using learning outcomes tests. While the response of students using questionnaires. Based on the data analysis, it was found that the effectiveness of the implementation of blended learning was categorized as medium with an N gain value of 0.58, and the student response to learning through blended learning was good. The conclusion is that the quality of the implementation of blended learning in analog electronics learning has medium effectiveness, and the student response is good.
Torrefaction of palm kernel shell using COMB method and its physicochemical properties
Authors: Karelius  , Dirgantara M , Rumbang N , Suastika K G , Akbar A R M 
Published: January 2020

Abstract
Torrefaction is a pre-treatment in thermochemical processes in order to make biomass becomes fuel with better properties, such as the increasing of carbon content and caloric value. Torrefaction is generally carried out at a temperature range of 200-300°C with holding temperature of 30-60 minutes in inert conditions and atmospheric pressure. On the other side, palm oil is one of biomass that is potential to be used as fuel in which its availability is abundant and has good physical properties. The purpose of this study is to increase the caloric value and thermochemical properties by torefaction process. Within this study of palm kernel shell, torrefaction is carried out from 0.5 cm sieve using the COMB (Counter Flow Multi-Buffle) method at temperature of 250°C with heat flow rate of 4 cm3/minute and characterized by its physicochemical properties. The obtained results are the energy yield of 0.77 with an energy density of 1.21 and the caloric value that increases from 16.82 to 19.11 MJ. This is also supported by the results of ultimate analysis where the carbon level increases then the O/C and H/C ratio decreases. Moreover, based on proximate analysis, volatiles matter level decreases by 9.34% and ash content increases by 0.64%. To sum up, palm kernel shells can be enhanced by their physicochemical characteristics through torrefaction.
How to develop PCK ability for prospective mathematics teachers? The case of lesson study-based field experience practice
Authors: Karim  , Danaryanti A 
Published: January 2020

Abstract
Prospective mathematics teacher students must have skills pedagogical content knowledge (PCK) adequate. They are expected to become professional teachers when entering the workforce. However, at this time, there are still stakeholders who doubt their PCK capabilities. For this reason, efforts are needed to prepare the PCK ability of prospective mathematics teachers well. The aim of this study is to develop PCK for prospective mathematics teacher students through lesson study-based Field Experience Practice (FEP). This research uses action research method that involves lectures, teachers, and students. The research subjects were seven prospective mathematics teacher students who were participating in fieldwork practice partner schools in Banjarmasin. The research is conducted based on lesson study in 2 cycles. Each cycle consists of three stages of activity, namely planning (Plan), implementation (Do), and reflection (See). The data is collected through a study of learning plan, carry out, and reflection. The results of the research showed that during the planning and carrying out, there were developments in prospective mathematics teacher students’ PCK ability from cycle I to cycle II. Through the lesson study-based FEP, prospective mathematics teacher students can learn, gain knowledge, and build PCK knowledge from lecturers, teachers, and friends who participate in open lesson activities. The implication of this research is the need to revitalize the implementation of FEP for prospective mathematics teachers, namely by integrating lesson study in FEP activities.
Acquisition of projectile motion concepts on phenomenon based physics’ experiential learning
Authors: Yuliati L , Nisa’ F , Mufti N 
Published: January 2020

Abstract
This research aimed to explore the concept acquisition in phenomena based experiential learning on projectile motion. Through phenomenon based physics’ experiential learning, students analyze a phenomenon & link it with the existing concept so that it will be able to increase the acquisition of the concept. This research employed a mixed-method with an embedded experimental model. The data was obtained from test, interview, and observation on 26 tenth graders of Senior High Schools in Malang, East Java, Indonesia. Data was analyzed by N-Gain score and d-effect size. The students’ concept acquisition was grouped based on a cognitive level and projectile motion concept. The results showed that the improvement of students’ concept acquisition after taught with phenomenon-based physics’ experiential learning. The average score of pretest and posttest is 29.96 and 77.69 with high N-gain and large d-effect size, 0.681 and 5.5 respectively. Concepts of velocity and acceleration on the projectile motion should be noticed using vector analyze in daily learning.
Developing an instrument for students scientific literacy
Authors: Atta H B , Vlorensius  , Aras Irianto , Ikhsanudin  
Published: January 2020

Abstract
Scientific literacy is the ability to read, write, and assist in acquiring competencies that are interrelated to learning science effectively. This research aimed to know the construction, characteristics of items, and quality of developed scientific literacy instrument and to measure the ability of scientific literacy of junior high school students in Tarakan city. This research uses the procedure of test development. The research samples for developing the instrument and measuring ability were 733 students obtained from six junior high schools, which determined by purposive sampling. The data were collected by administering the test and documentation. The data analysis use Winsteps and SPSS computer programs. The results demonstrate the instrument which meets scientific literacy was in the form of 40 items of multiple-choice questions and 6 items of essay questions. The content validity of the test instrument was 0.77, and the Cronbach reliability was 0.85. Both of these criteria were in the high category. The ability of scientific literacy of students in Tarakan city in the knowledge and process dimensions were relatively low. In this case, it should be considered that the development of scientific literacy skills needs to be optimized, especially at the samples.
Self-regulated learning: Intelligence quotient and mathematical disposition
Authors: AB J Sutrisno 
Published: January 2020

Abstract
Self-regulated learning is very important in efforts to improve mathematics learning outcomes. For that, the factors that influence it needs to get attention in learning mathematics. these factors include intelligence and mathematical disposition. The purpose of this study is to analyze the direct effect of intelligence quotient and mathematical disposition towards self-regulated learning in state junior high school students in Bandar Lampung City. The research uses survey methods with path analysis techniques. Intelligence quotient (X1) and mathematical disposition (X2) as exogenous variables, self-regulated learning (X3) as an endogenous variable. The results show 1) there is a positive direct effect of intelligence quotient towards self-regulated learning; 2) there is a positive direct effect of mathematical disposition towards self-regulated learning.
The design and implementation of an instrument for converting angular velocity to linear velocity based on arduino atmega 2560
Authors: Sesa E , Feriyono A , Djamal M , Musa M D T , Ulum M S , Farhamsa D 
Published: January 2020

Abstract
The experiment tool of converting angular velocity into linear velocity has been built to support the physics education in the Physics Department of Tadulako University. In this project, the experimental tool has been designed, manufactured, and tested to convert the angular velocity value to linear velocity based on Arduino ATMega 2560. The stages of this research begin with the design and manufacture: mechanical system, optical sensor circuit, stepper motor circuit, the circuit of LCD and keypad controlled by Arduino ATMega 2560. The next step is the building controlling program as the brain of this instrument. This experimental tool has been tested and working properly. It operates for a rotation speed range of 1 rpm - 112 rpm. The value of converted linear velocity both theoretically and measured value is relatively the same.
Contribution of urban heat island on landscape composition and its impact to the land surface temperature (case study on Palembang City-Indonesia)
Authors: Gaol A L , Serhalawan Y R , Kristianto A 
Published: January 2020

Abstract
Palembang is the capital of South Sumatra Province with the development carried out through the diversion of land functions into built-up land causes an increase in surface temperature which triggers the urban heat island (UHI) phenomenon. This study aims to discuss the phenomenon of UHI in Palembang City and its relation to land composition and population density on surface temperatures obtained from the processing of multi-temporal Landsat Images in 1989, 2001, 2018, with the specification of clear sky using the LST algorithm and guided classification. The distribution of the UHI phenomenon is obtained by classifying LST to obtain the UHI threshold. The value of the determinant coefficient (R2) between the relationship of changes in surface temperature which is directly proportional to the increasing population, the increase in the area of each open land and built-up land reached 62.6%, 86.3%, and 55.0%. Conversely, there is a negative link between surface temperature and dense vegetation with R2 reach 90.4%. The affected area of UHI is located in the centre of Palembang, reaching 33.5 km2 of the total area. It is necessary to have ideal city mitigation and arrangement by calculating the green area with the increasing population in Palembang City.