bluuebunny/crossref_metadata_2025_split huggingface dataset:
A New Surgical Technique for Internal Shoulder Contractures Secondary to Obstetric Brachial Plexus Injury: An Anterior Coracohumeral Ligament Release
Authors: Sarac C. , Hogendoorn S. , Nelissen R.G.H.H. 
Published: August 2019

Background Obstetric brachial plexus injuries result from traction injury during delivery; 30% of these children sustain persisting functional limitations related to an external rotation deficit of the shoulder. The aim of this study was to compare the intraoperative gain in external rotation after a posterior subscapular release and an anterior coracohumeral ligament release.
Methods This is a prospective study on 102 children with an internal rotation contracture of the shoulder who received either a posterior subscapular release (posterior skin incision along the medial border of the scapula of 3–5 cm) or an anterior (5-mm skin incision) coracohumeral ligament release between 1996 and 2010. After general anesthesia, internal and external rotations in both adduction and abduction were measured before and after the surgical release.
Results After a posterior subscapular release, the intraoperative external rotation improved with a mean of 64 degrees (95% confidence interval [CI]: 54–74; p < 0.001) in adduction and with a mean of 41 degrees (95% CI: 32–49; p < 0.001) in abduction. After an anterior coracohumeral ligament release, external rotation increased with a mean of 61 degrees (95% CI: 56–66; p < 0.001) in adduction and a mean of 42 degrees in abduction (95%CI: 39–45, p < 0.001). Differences between these two groups were not statistically different.
Conclusion The anterior release technique shows comparable results with the posterior subscapular release. And since it is performed through a smaller incision of 5 mm, this is our preferred method to increase passive external rotation.
Level of evidence II.
Autophosphorylation is sufficient to release Mps1 kinase from native kinetochores
Authors: Koch Lori B. , Opoku Kwaku N. , Deng Yi , Barber Adrienne , Littleton Aimee J. , London Nitobe , Biggins Sue , Asbury Charles L. 
Published: August 2019

Significance
Chromosomes carry our genetic material and must be precisely copied and partitioned into daughter cells during cell division. To ensure correct partitioning, a signaling cascade called the spindle assembly checkpoint delays cell division until all chromosomes are correctly attached to microtubules, the dynamic filaments that drive chromosome movements. If even a single chromosome is unattached or incorrectly attached, an enzyme, Mps1, initiates checkpoint signaling by binding to and modifying kinetochores, the large protein complexes that connect chromosomes to microtubules. Here we identify conditions that promote Mps1 release from native kinetochore particles isolated from yeast. Our findings suggest how the checkpoint “wait” signals might be turned off when kinetochores bind microtubules.
Graphene-like monolayer monoxides and monochlorides
Authors: Luo Bingcheng , Yao Yuan , Tian Enke , Song Hongzhou , Wang Xiaohui , Li Guowu , Xi Kai , Li Baiwen , Song Haifeng , Li Longtu 
Published: August 2019

Significance
Since the discovery of graphene in 2004, 2D materials have sparked tremendous interest due to their fascinating optical, mechanical, and electronic properties, and their potential in catalysis, optoelectronic devices, energy storage, and conversion. After experimental and theoretical studies mainly focused on atomically thin nanomaterials with layered structures, the whole family of 2D materials is almost complete, and recently few new graphene-like materials were reported. Here, we report the discovery of graphene-like mononitrides, monoxides, monochlorides, and monoselenide monolayers, which have shown high dynamic, thermal, kinetic, and mechanic stabilities.
Distribution of metastable states of spin glasses
Authors: Schnabel Stefan , Janke Wolfhard 
Published: August 2019

Abstract
The complex behavior of systems like spin glasses, proteins or neural networks is typically explained in terms of a rugged energy or fitness landscape. Within the high-dimensional conformation space of these systems one finds features like barriers, saddle points, and metastable states whose number – at least in the case of spin glasses – grows exponentially with the size of the system. We propose a novel Monte Carlo sampling algorithm that employs an ensemble of short Markovian chains in order to visit all metastable states with equal probability. We apply this algorithm in order to measure the number of metastable states for the two-dimensional and the three-dimensional Edwards-Anderson model and compare with theoretical predictions.
Cluster expansion of the many-body Feynman path-integral for hard spheres
Authors: Bhardwaj Anish , Manousakis Efstratios 
Published: August 2019

Abstract
We apply a recently developed technique, which is based on a cluster expansion of the many-body Feynman path-integral, to the case of a dense system of distinguishable particles interacting with a hard-sphere potential. We find that our quantum hypernetted-chain approximation yields accurate results for the pair distribution function as compared to path-integral Monte Carlo results even in the high density regime.
Effect of low-temperature annealing on void-related microstructure in amorphous silicon: A computational study
Authors: Paudel Durga , Atta-Fynn Raymond , Drabold D. A. , Biswas Parthapratim 
Published: August 2019

Abstract
We present a computational study of void-induced microstructure in amorphous silicon (a-Si) by generating ultra-large models of a-Si with a void-volume fraction of 0.3%, as observed in small-angle X-ray scattering (SAXS) experiments. The relationship between the morphology of voids and the intensity of scattering in SAXS has been studied by computing the latter from the Fourier transform of the reduced pair-correlation function and the atomic-form factor of amorphous silicon. The effect of low-temperature annealing on scattering intensities and the microstructure of voids has been addressed, with particular emphasis on the shape and size of voids, by studying atomic rearrangements on void surfaces and computing the average radius of gyration of the voids from the spatial distribution of surface atoms and the intensity plots in the Guinier approximation. The study suggests that low-temperature annealing can lead to considerable restructuring of void surfaces, which is clearly visible from the three-dimensional shape of the voids but it may not necessarily reflect in one-dimensional scattering-intensity plots.
Devitrification of the Kob-Andersen glass former: Competition with the locally favored structure
Authors: Turci Francesco , Patrick Royall C. , Speck Thomas 
Published: August 2019

Abstract
Supercooled liquids are kinetically trapped materials in which the transition to a thermodynamically more stable state with long-range order is strongly suppressed. To assess the glass-forming abilities of a liquid empirical rules exist, but a comprehensive microscopic picture of devitrification is still missing. Here we study the crystallization of a popular model glass former, the binary Kob-Andersen mixture, in small systems. We perform trajectory sampling employing the population of the locally favored structure as order parameter. While for large population a dynamical phase transition has been reported, here we show that biasing towards a small population of locally favored structures induces crystallization, and we estimate the free energy difference. This result sheds new light on the competition between local and global structure in glass-forming liquids and its implications for crystallization.
The effect of interactive demonstration method on heat energy learning
Authors: Triayomi Ria 
Published: August 2019

Abstract
The purpose of this study is to determine whether there is a significant influence in using the interactive demonstration methods on heat energy learning. The research method used was an experimental method, quasi-experimental design form, and Nonequivalent Control Group Design. The sample of the research was taken by using purposive sampling technique. After the researcher conducted teaching and learning activity on the subject of heat energy in the experimental class, the obtained mean of the cognitive learning outcomes in the experimental class was 81.60. With Chi-Square test and F test, it showed that the cognitive learning result data of the experimental class and control class were distributed normally and homogeneously. After the hypothesis was tested using t-test polled variance, then the t arithmetic > t table, which was 4.32 > 1.99 t arithmetic value lies in the rejection area of H0 and the acceptance area of Ha with a 5% error rate and the degree of freedom was 74. Consequently, it can be concluded that there was a significant influence in using interactive demonstration methods on heat energy learning. If one plans using this method, it is recommended to use it for materials that are often encountered by students in everyday life.
Simulation of pension plan supplemental cost based on withdrawal rate interpolation and different benefit
Authors: Kresnawati Endang Sri , Resti Yulia 
Published: August 2019

AbstractOne factor that affects the supplemental cost is the probability that a participant will survive in employment to the retirement age. The probability depends on the mortality rate, the disability rate, the withdrawal rate, and the normal retirement rate. All of the rates are presented in one-year interval except the withdrawal rate. This paper uses the cubic spline interpolation to get the withdrawal rates at one year intervals, whereactuarial calculation method used is Projected Unit Credit (PUC), and pension benefits are calculated using two assumptions, namely the final average and the carrier accrued salary. The interpolation results show that first, the probability of withdrawal at the age of 25 for participants entering the pension program at the age of 20 differs from ages of 21, 22, 23, and 24. Likewise the probability of withdrawal at 30 years of age for participants entering a pension program at the age of 25 is different from ages 26, 27, 28 and 29. The same applies to other ages. The younger the age enters the pension program, the greater the unfunded liabilities that can arise. The unfunded liabilities for the final salary benefit assumption is smaller than the carrier average salary benefit assumption. The unfunded liabilities for entry at a 1-year interval are greater than 5-year intervals.
A path analysis model of students’ statistics achievement
Authors: Cahyawati Dian , Wahyudin  , Prabawanto Sufyani 
Published: August 2019

Abstract
Students achievement in statistics course could be influenced by various factors, both cognition and non-cognition factors. This article presents the preliminary study result about the causal relationship of some those factors, namely students’ statistics achievement (Stat_ACH), students’ attitudes toward statistics (ATS), self-regulated learning (SRL), academic achievement (Ac_ACH) and its prediction model about Stat_ACH. The hypothetical model was proposed by determining that ATS and SRL were two correlated exogenous variables and Ac_ACH as an intervening variable in its effect on the endogenous variables of Stat_ACH. A sample of 150 undergraduate active students who have taken a statistics course in their study participated in filling the questionnare as an research instrument. Validity and reliability test was conducted to the instruments. A path analysis model was used to obtain a prediction model. The results showed that students’ ATS and SRL was moderately correlated; students’ Ac_ACH was influenced by SRL variable; students’ Ac_ACH was more appropriated to be an independent variable rather than as an intervening variable. Students’ statistics achievement could be predicted through their academic achievement. The higher of students’ academic achievement the higher of students’ statistics achievements.
Investigate the effects of synthesizing techniques on the particle size reduction and thermal behaviors of carbon-based material from natural wood charcoal
Authors: Barlin  , Chang W C 
Published: August 2019

Abstract
In this research work, a novel investigation of the carbon-based material from natural wood charcoal synthesized with various top-down techniques on the particle size reduction and thermal behaviors. First, three powder samples were synthesized using manually by hand. Second, two powder samples were synthesized using ball milling. The particle size (length and width) were analysed using SEM micrographs. Furthermore, the thermal characterization had been carried out using thermogravimetric analysis. The results showed that the length and width of the ball milled sample are smaller than the manually milled samples (53, 74 and 105 μm) due to the higher energy mill between the ball mill and the charcoal powder. The thermogravimetric analysis showed that the samples takes places in four steps of decomposition. First stage occurred at 49.9-50°C, second at 72.58-83.69 °C, third at 268-319 °C and fourth at 689-738 °C. The ball milled samples exhibited the lower weight loss total (23.3 and 59.12%) than the manually milled samples (29.58, 34.9 and 36.39%) which is affected by the chemical composition (lignin, cellulose and hemicellulose) and inorganic substances present in the samples. As a conclusion, the ball milling gave the optimum results in terms of particle size reduction and thermal behaviors.
Study of Saros cycle and non-partial solar eclipse with Newton mechanics approach
Authors: Bama Akhmad Aminuddin , Tamara M R , Arsali  , Marini D 
Published: August 2019

Abstract
We have derived Saros cycle period by Newton mechanics approach using a method that had been usedby Chalub. We got the result approximately 6597,1 day; with the error comparedto Saros cycle (6585,3 day) of approximately 0,1792%. For non-partial solar eclipse case, we too have derived the equation to relate between this sun eclipse and geometrical parameter of Earth, Moon, and Sun mathematically. This equation indicates that for total sun eclipse, the umbra’s radius P on earth surface must have positive sign, whereas negative sign for annular sun eclipse. To test this equation, we compare it to a recorded (past or predicted) non-partial solar eclipse. The result indicates appropriateness for total and annular sun eclipse, but it does not appropriate for hybrid sun eclipse as we anticipated that is the magnitude of umbra’s radius P for this eclipse must near zero.
Application of advanced research WRF model using tropical (New Tiedtke) scheme and Kain-Fritsch scheme in predicting short-term weather in Palembang and its surrounding areas
Authors: Satya Octavianus Cakra , Arsali  , Mandailing Puad Maulana , Kaban Hadir 
Published: August 2019

Abstract
The New Tiedtke and Kain-Fritsch schemes in WRF-ARW had been applied separately for the case of short-term weather predictions in Palembang and its surroundings from 1 to 7 December 2017. The WRF-ARW predictions compared to observation data at SMB II station showed that the Kain-Fritsch scheme gave better results than the New Tiedtke scheme either for temperature (MAE = 1.24 ° C to 1.31 ° C, RMSE = 1.49 ° C to 1.60 ° C, and MAPE = 4.46 to 4.67) or for relative humidity (MAE = 6.24% to 6.54%, RMSE = 7.61 % of 8.28%, and MAPE = 8.16% for 8.61%). However, for precipitation predictions even from dichotomous test the FBI value obtained by the Kain-Fritsch scheme (FBI=2.6) is better than that by the New Tiedtke scheme (FBI=3) with a FBI value of 3, both schemes could not predict precipitation well (ACC = 0.67 to 0.64, TS = 0 to 0, POD = 0 to 0, FAR = 1 to 1).
Calculation of burnup fuel cell uranium metallic with carbon dioxide cooled
Authors: Susanty Enda , Ariani Menik , Su’ud Zaki , Monado Fiber 
Published: August 2019

Abstract
This article presents the calculation of uranium metallic fuel cell (U-10%Zr) to be used in carbon dioxide cooled Gas-cooled Fast Reactor (GFR). This fuel cell is a cylindrical cell with a 1.4 cm diameter. The fuel cell is tested without enrichment and enrichment of 1-10%. Calculation of fuel cells based on neutron transport equation using SRAC. The calculation parameter observed is the value of infinite multiplication factor (K-inf), conversion ratio, and Pu-239 atomic density. The results of the fuel cell calculation with 6% enrichment showed the K-inf and conversion ratio is relatively stable during burn-up history. While the largest atomic density of Pu-239 occurs in fuel cells without enrichment because U-238 atoms undergoing transmutation to Pu-239.
Synthesis of polyvinylpyrrolidone/mangosteen pericarp extract (MPE) fibered particles using electrospray
Authors: Rezeki Y A , Wahyuni N , Munir M M , Khairurrijal K 
Published: August 2019

Abstract
The electrospray method was used to produce polyvinylpyrrolidone (PVP)/mangosteen pericarp extract (MPE) solids. The concentrations of PVP/MPE were 3 and 4 wt.% in ethanol solvent with the mass ratios of PVP/MPE of 10:0, 8:2, and 6:4 (w/w). The surface morphology of PVP/MPE solids was investigated by an optical microscope and a scanning electron microscopy (SEM). The PVP/MPE precursor solution with the concentration of 3 wt.% and the mass ratio of 8:2 produced PVP/MPE fibered particles. From its SEM image, the particles and fibers of the PVP/MPE fibered particles had average diameters of 819 and 84 nm, respectively. The FT-IR spectra of the PVP/MPE fibered particles showed that MPE was encapsulated in PVP matrix as the PVP/MPE fibered particles had sharper peaks for the carbonyl, alkene, and amide groups.
Analysis of Kepler’s law to the movement of celestial bodies
Authors: Fatimah Galuh Titi , Marini Dian , Supardi  , Bama Akhmad Aminuddin 
Published: August 2019

Abstract
Unity of planetary movement theory from Newton’s law and Kepler’s law shows the orbiting motion of the planet to the sun. Kepler’s law illustrates the movement of planets orbiting the sun, assuming the sun is silent, thereby exposing the path of the orbits of planets that are often encountered so far. In fact, the sun also moves towards a certain center, so that the form of a planetary orbital path that is so closed is not a reflection of the actual movement of the planet. When the sun moves then the movement of the planet is not an elliptical but rigid. In addition the earths movement orbiting the sun is not as simple as it is described, because it is not just the earth that orbits the sun but there are other celestial bodies that also orbits the sun. So it is necessary to show the relationship of the movement of other planets to the movement of the earth around the sun. The purpose of this study is to find out the relation between the movement of other planets to the earths motion orbiting the sun and to know the true orbit path of the planets as the sun moves too. From this study, it can be seen that the use of Kepler’s law equations and Newton’s laws that have existed so far is not for the actual movement of the solar system, because many factors influence. During this time, the use of Kepler’s law and Newton’s law for the movement of the earth and the sun always considered their physical conditions ideal, assuming the sun was silent. The actual conditions of the sun moving, the shape of the trajectory of the movement of celestial bodies is not elliptical but rigid.
The effect of milling time on the structure properties and morphology of aluminium powder from construction industry waste milled using high energy milling
Authors: Ilahi Ratu Inayah , Arsyad Fitri Suryani , Sari Dwika , Jannah Miftahul 
Published: August 2019

Abstract
The effect of milling time on the structure and morphology of aluminum frame powder has been investigated. In this study, aluminum was made in aluminum powder, as a raw material for making bipolar plates in the Proton Exchange Membrane Fuel Cell (PEMFC) technology. Aluminum powder is synthesized using high-energy milling (HEM) with variations in milling time for 10, 20, 30, 40, and 50 minutes. Aluminum powder that has been milled, is characterized using X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). From the results of XRD characterization, an aluminum frame that is milled for 10-20 minutes has an aluminum phosphide phase. Whereas for an aluminum frame that is milled for 30, 40 and 50 minutes has an aluminum phase Rudashevskyite. From the results of XRD also obtained, as aluminum frame has a cubic crystal structure with lattice parameters α = β = γ = 900, and aluminum powder rang each has a crystal size of 258.31, 865, 218.2, 560, and 255.9 Ǻ for 10 milling times, 20, 30, 40, and 50 minutes, so it can be concluded that the size of the aluminum frame powder crystal fluctuates. While from the results of SEM, aluminum nanoparticle powder obtained from the nanosheet structure, where the gray one is aluminum particles and the black one shows the presence of other elements. The composition of order 94% aluminum nanoparticles is pure aluminum and 6% other elements, this is reinforced from the SEM image which looks more dominant gray.
Surface Morphology Properties Doped RuO2 (0, 2, 4, 6%) of Thin Film LiNbO3
Authors: Irzaman  , Zuhri Mahfuddin , Novitri  , Irmansyah  , Setiawan Ardian Arif , Alatas Husin 
Published: August 2019

Abstract
Successful LiNbO3 film was prepared with the variation of 0%, 2%, 4%, and 6% RuO2 concentration and annealing temperature variation above the p-type silicon substrate (100), using the CSD method with the spin coating at 8000 rpm for 30 seconds in solubility 2 M. Films in annealing at 850 °C for 8 hours with a temperature increase of 1.67 C/min. Samples were characterised using SEM and EDX spectrometer. We have obtained the morphology nonhomogenous surface and element stoichiometry. LiNbO3 thin film is a potential material for light sensors.
Dark matter hypothesis to maintain theory of gravity
Authors: Meidina Wardah Intan , Supardi  , Bama Akhmad Aminuddin 
Published: August 2019

Abstract
In this paper, it will be explained pedagogically about the necessity of the emergence of the hypothesis of dark matter in an effort to maintain the existing theory of gravity. Astronomical observations of the rotation of stars in the center of galaxies show very large deviations from the predictions of existing gravitational theories. To maintain the theory of gravity, a new hypothesis is needed, i.e. by emerging the concept of dark matter. Dark matter is thought to play a major role in its interaction with gravity throughout the universe and is responsible for the regularity of the rotation speed that is (almost) constant from all galaxies in the universe.
Effect of temperature sintering on physical properties, hardness and crystal structures of ceramic TiO2 doped with 2 % Fe2O3
Authors: Umia Fika , Ramlan  , Sardjono Priyo , Muljadi  , Suprapedi  
Published: August 2019

Abstract
The ceramic TiO2 doped with 2 % weight of Fe2O3 has been prepared by using powder metallurgy method. The experimental research begins with the preparation of TiO2 powder mixed according with Fe2O3 powder then calcined at 1050°C for one hour. Then the calcined powder is crushed and mixed with celuna binder WE-518 as much 3% weight and compacted by using hydraulic press machine with 8 tons force. The sintering temperatures were varied starting from 1150 °C, 1200 °C and 1250 °C. The characterization of sintered samples includes: testing of its physical properties (density and porosity), hardness and microstructure analysis (X-Ray Diffraction). The results of the characterization show that the optimum of sintering temperature was achieved at the temperature 1250 °C, the results were obtained such as : density value = 2.60 g/cm3 and porosity value = 17.8 %. The result of hardness testing shows that the highest value of hardness is 292 Hv at sintering temperature 1250 °C. The result of XRD shows that it was found TiO2 phase as dominant and minor phase that is TiO2 rutile.