bluuebunny/crossref_metadata_2025 huggingface dataset:
Subchondroplasty for Bone Marrow Lesions in the Arthritic Knee Results in Pain Relief and Improvement in Function
Authors: Chua Kenon , Kang Joseph Yida Benjamin , Ng Favian Ding Jie , Pang Hee Nee , Lie Denny Tjiauw Tjoen , Silva Amila , Chang Paul Chee Cheng
Published: November 2019

Subchondroplasty is a relatively new joint preserving procedure, which involves the localized injection of calcium pyrophosphate bone substitute into the bone marrow lesion. The advent of magnetic resonance imaging (MRI) has greatly facilitated the identification of these bone marrow lesions. We investigated the clinical efficacy of subchondroplasty in the treatment of symptomatic bone marrow lesions in the knee, including knees with preexisting osteoarthritis. This study comprised of 12 patients whose knees were evaluated with standard radiographs and MRI to identify and localize the bone marrow lesions. They then underwent subchondroplasty under intraoperative radiographic guidance. Preoperative and postoperative visual analog scale (VAS) pain scores, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores, and Knee Injury and Arthritis Outcome Scores (KOOS) were obtained. VAS scores improved significantly from 7.5 ± 1.8 before surgery to 5.2 ± 2.7 after surgery. This further improved to 2.1 ± 2.4 at the one-year follow-up. KOOS scores improved significantly from 38.5 ± 17.0 before surgery to 73.2 ± 19.0 at the one-year follow-up. WOMAC scores improved significantly from 47.8 ± 20.5 before surgery to 14.3 ± 13.2 at the one-year follow-up. Subchondroplasty offers an effective way to treat subchondral bone marrow lesions in the arthritic knee, resulting in improvement in symptoms and early return to activity. Long-term studies are required to evaluate if these benefits can last. This is a Level II study.
Physiological Intracranial Calcification in Eastern Indian Population-A CT Scan Study
Authors: Som Panchali , Roy Rajarshi , Datta Sumit , Ghosal Asis Kumar , Saha Anubha , Halder Subhajit
Published: November 2019

Background and Aims:Knowledge of physiological calcification in brain parenchyma is essential to avoid misinterpretation during radiological evaluation. The calcifications are commonly seen in pineal gland, falx cerebri, tentorium cerebelli and choroid plexus. Objective:To determine the incidence of physiological intracranial calcification and its relationship to age and sex in eastern Indian population. Materials and Method: A cross sectional descriptive study of CT scan brain was performed in age group between 20-80 yrs in eastern India. The study was conducted on 64 Slice MDCT PHILIPS Brilliance. Bulk of our patients was of road traffic accidents and routine CT scan study revealed these physiological calcifications and did not possess any morphological abnormality. Results: 852 patients of which 503 male and 349 female were studied and overall 1429 separate calcified areas were identified due to co-existent calcifications in most of the patients. The incidence of calcification was in pineal gland (62%), choroid plexus (53%), dura mater (26%), basal ganglia (2.8%), dentate nucleus (1.4%) and Habenular nuclei (6%). Incidence is more in male than in female. Conclusion: Physiological calcifications in some of the intracranial structures are not a very uncommon finding and it should not be confused with a pathological one.
Human Cadaveric Study of Lumbar Plexus and its Clinical Implication
Authors: Ram Sameer , Patel Jitendra , Kanani Sanjay
Published: November 2019

Background & Aims: The Lumbar plexus describes the origins of 4 of the nerves supplying the lower limb (femoral, lateral cutaneous nerve of the thigh, obturator and genitofemoral) along with the ilioinguinal and iliohypogastric nerves. Aim of this study is to study the abnormalities in formation of lumbar plexus and communication between the branches of lumbar plexus and its clinical implication. Material & Method: This study was conducted on 100 cadavers (67 male and 33 female) with an age range of 50 – 90 years. Results: No abnormality was found related to roots and trunk. Post fixed lumbar plexus (bilateral) were found in 6 cadavers. Genital branch and femoral branch was found to arise separately from the root in 22 cadavers (bilaterally). Accessory lateral femoral cutaneous nerve was observed on both sides in 4 cadavers. Femoral nerve was found to arise from dorsal division of L3-4-5 in 8 cadavers (bilateral). Accessory obturator nerve was found bilaterally in 26 cadavers and it was arising from L3-4. Conclusion:Knowledge of variations in the formation and branching pattem of lumbar plexus is very important during lumbar plexus block for various surgical and palliative procedures.
Antenatal Detection of Abnormal Placental Cord Insertion across Different Trimesters: A Prospective Cohort Study
Authors: Ismail Khadijah I. , Hannigan Ailish , Kelehan Peter , O'Donoghue Keelin , Cotter Amanda
Published: November 2019

Objectives This article prospectively examines the use of ultrasound for antenatal detection of abnormal placental cord insertion (PCI) and compares the antenatal classification with delivered placental classification.

Study Design This prospective cohort study examined 277 singleton pregnancies in a tertiary center. Scans were performed between 10 and 14, 18 and 22, and 32 and 34 weeks where PCI site was identified and its shortest distance to margin measured. Standardized images of delivered placentas were taken and digitally measured. Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of antenatal classification compared with delivered placental classification were calculated.

Results Abnormal PCI (distance < 2 cm from margin) was confirmed in 30/277 (11%) placentas at delivery. Note that 102/277 (37%) of PCI sites were classified as abnormal in the first trimester (T1), 43/277 (16%) in the second trimester (T2), and 28/277 (10%) in the third trimester (T3). Sensitivity (73%) and specificity (91%) were highest at T2. The PPVs were low (22% in T1, 51% in T2, and 64% in T3) and the NPVs were high (96% in T1 and 97% in both T2 and T3) for all scans.

Conclusion Abnormal PCI can be detected antenatally with optimal agreement with postnatal classification in T2. However, the incidence is overestimated at early scans with low PPVs.
Two basic vibrational modes of hydrogen bonds in ice XIII
Authors: Wei Zhi-Wei , Zhu Xu-Liang , Cao Jing-Wen , Qin Xiao-Ling , Jiang Lu , Gu Yue , Wang Hao-Cheng , Zhang Peng
Published: November 2019

Using a first-principles density functional theory method, we calculated the vibrational spectrum of ice XIII. In combination with spectroscopic experiments, we demonstrated that the two characteristic hydrogen bond (H-bond) peaks in the translational region of ice V (the hydrogen-disordered counterpart of ice XIII) recorded by inelastic neutron scattering originate from two basic H-bond vibrational modes. We first observed this phenomenon when studying ice Ic and then confirmed it when studying ice XIV, XVI, and XVII. This study of high-pressure ice XIII supports our theory that two basic H-bond modes exist as a general rule among the ice family. The “isolated O–H vibration modes” found by Whale et al. when studying ice XV are also discussed in this work.
Cyclic utilization control for regenerative braking energy of metro based on high speed flywheel array
Authors: Zhang Dan , Jiang Jiayan , Jiang Jianguo , Chen Ying , Zhang Liang , Wei Tongzhen , Zhao Sifeng
Published: November 2019

In order to realize the cyclic utilization for the regenerative braking energy of a metro, a high-speed flywheel array based on high power density and long life is adopted. First, a regenerative energy braking system with a flywheel array is constructed. In order to achieve stable operation and high dynamic response of the flywheel, a control strategy based on voltage threshold is proposed. At the same time, a simulation model of starting and braking of the metro with a high-speed flywheel array is built in MATLAB/Simulink, and the relevant simulation verification is completed. Finally, in order to further verify the effectiveness of the proposed strategy, a GTR flywheel array with a total capacity of 1 MW was installed in a domestic traction station, and field application tests were carried out. The results show that the proposed control strategy can effectively realize the cyclic utilization for regenerative braking energy.
Ultra-small Cd@NiAg and Cr@NiAg nano-clusters with enhanced mixing
Authors: Datta Soumendu
Published: November 2019

Structural, mixing vs segregation, and electronic properties of Cd-doped and Cr-doped ultrasmall NiAg nanoclusters have been analyzed here using first principles density functional theory based electronic structure calculations. The optimized structures of the doped clusters assume a core-shell-like structural pattern, similar to that of the undoped NiAg clusters. Both the dopings induce an enhanced mixing trend keeping intact the core-shell structural pattern of the host NiAg nanoclusters. Between the two types of dopings, the Cr-doping appears more effective for providing enhanced mixing of the NiAg clusters. Enhanced orbital hybridization for the doped NiAg clusters plays an important role in increasing the mixing trend. In the present work, we use a new formulation of mixing energy for such ternary nanoclusters to assess the merit of the doped binary NiAg nanoclusters compared to a similar doping in the associated monometallic nanoclusters of same size. This analysis indicates that the Cd-doping indeed is efficient for enhancing the mixing of the NiAg nanoclusters, while the Cr-doping would be more favorable for the monometallic Ni-cluster compared to the binary NiAg nanocluster of similar size.
On the anisotropies of magnetization and electronic transport of magnetic Weyl semimetal Co3Sn2S2
Authors: Shen Jianlei , Zeng Qingqi , Zhang Shen , Tong Wei , Ling Langsheng , Xi Chuanying , Wang Zhaosheng , Liu Enke , Wang Wenhong , Wu Guangheng , Shen Baogen
Published: November 2019

Co3Sn2S2, a quasi-two-dimensional system with a kagome lattice, has been found to be a magnetic Weyl semimetal recently. In this work, the anisotropies of magnetization and transport properties of Co3Sn2S2 were investigated. The high field measurements reveal a giant magnetocrystalline anisotropy with an out-of-plane saturation field of 0.9 kOe and an in-plane saturation field of 230 kOe at 2 K, showing a magnetocrystalline anisotropy coefficient Ku up to 8.3 × 105 J m−3, which indicates that it is extremely difficult to align the small moment of 0.29 μB/Co on the kagome lattice from the c axis to the ab plane. The out-of-plane angular dependence of Hall conductivity further reveals strong anisotropies in the Berry curvature and ferromagnetism, and the vector directions of both are always parallel with each other. For the in-plane situation, the longitudinal and transverse measurements for both I // a and I ⊥ a cases show that the transport on the kagome lattice is isotropic. These results provide the essential understanding of the magnetization and transport behaviors for the magnetic Weyl semimetal, Co3Sn2S2.
Production of lycopene by metabolically engineered Pichia pastoris
Authors: Zhang Xinying , Wang Denggang , Duan Yehong , Zheng Xueyun , Lin Ying , Liang Shuli
Published: November 2019

Lycopene is a highly valued carotenoid with wide applications in various industries. The market demand for lycopene promotes research in metabolic engineering of heterologous hosts for lycopene. In this study, Pichia pastoris strain GS115 was genetically engineered to produce lycopene by integrating the heterologous lycopene biosynthesis genes from Corynebacterium glutamicum ATCC13032. The resulting strain, L1, produced 0.115 mg/g cell dry weight (DCW) lycopene. Through optimization by promoter selection, improving the precursor supply and expanding the Geranylgeranyl diphosphate (GGPP) pool, ultimately, the lycopene yield of the final optimal strain was 6.146 mg/g DCW with shake flask fermentation and 9.319 mg/g DCW (0.714 g/L) in a 3 L fermenter. The lycopene yield in this study is the highest yield of lycopene in P. pastoris reported to date, which demonstrated the potential of P. pastoris in lycopene synthesis and as a candidate host organism for the synthesis of other high value-added terpenoids.
Downregulation of CFIm25 amplifies dermal fibrosis through alternative polyadenylation
Authors: Weng Tingting , Huang Jingjing , Wagner Eric J. , Ko Junsuk , Wu Minghua , Wareing Nancy E. , Xiang Yu , Chen Ning-Yuan , Ji Ping , Molina Jose G. , Volcik Kelly A. , Han Leng , Mayes Maureen D. , Blackburn Michael R. , Assassi Shervin
Published: November 2019

Systemic sclerosis (SSc; scleroderma) is a multisystem fibrotic disease. The mammalian cleavage factor I 25-kD subunit (CFIm25; encoded by NUDT21) is a key regulator of alternative polyadenylation, and its depletion causes predominantly 3′UTR shortening through loss of stimulation of distal polyadenylation sites. A shortened 3′UTR will often lack microRNA target sites, resulting in increased mRNA translation due to evasion of microRNA-mediated repression. Herein, we report that CFlm25 is downregulated in SSc skin, primary dermal fibroblasts, and two murine models of dermal fibrosis. Knockdown of CFIm25 in normal skin fibroblasts is sufficient to promote the 3′UTR shortening of key TGFβ-regulated fibrotic genes and enhance their protein expression. Moreover, several of these fibrotic transcripts show 3′UTR shortening in SSc skin. Finally, mice with CFIm25 deletion in fibroblasts show exaggerated skin fibrosis upon bleomycin treatment, and CFIm25 restoration attenuates bleomycin-induced skin fibrosis. Overall, our data link this novel RNA-processing mechanism to dermal fibrosis and SSc pathogenesis.
QCD analysis of CMS W + charm measurements at LHC with

and implications for strange PDF *
Authors: Yalkun Nijat , Dulat Sayipjamal
Published: November 2019

We calculate cross-sections and cross-section ratios of a charm quark production in association with a W gauge boson at next-to-leading order QCD using MadGraph and CT10NNLO, CT14NNLO, and MSTW2008NNLO PDFs. We compare the results with measurements from the CMS detector at the LHC at a center-of-mass energy of 7 TeV. Moreover, we calculate absolute and normalized differential cross-sections as well as differential cross-section ratios as a function of the lepton pseudorapidity from the W boson decay. The correlation between the CT14NNLO PDFs and predictions for

charm data are studied as well. Furthermore, by employing the error PDF updating method proposed by the CTEQ-TEA group, we update CT14NNLO PDFs, and analyze the impact of CMS 7 TeV

charm production data to the original CT14NNLO PDFs. By comparison of the

,

,

,

,

, and

PDFs at

GeV and

GeV for the CT14NNLO and CT14NNLO+Wc, we see that the error band of the

PDF is reduced in the region

, and the error band of

PDF is also slightly reduced at region

.
Precision study of

production including parton shower effects at CERN Large Hadron Collider *
Authors: Bi Huan-Yu , Zhang Ren-You , Ma Wen-Gan , Jiang Yi , Li Xiao-Zhou , Duan Peng-Fei
Published: November 2019

The precision study of

production with subsequent

and

decays at the Large Hadron Collider (LHC) aids in the investigation of Higgs gauge couplings and the search for new physics beyond the standard model. In this study, we calculate the shower-matched next-to-leading order QCD and electroweak (EW) corrections from the

annihilation and photon-induced channels to the

production at the

LHC. We deal with the subsequent decays of Higgs and

bosons by adopting the MADSPIN method. Both the integrated cross section and some kinematic distributions of

, H, and their decay products are provided. We find that the QCD correction significantly enhances the leading-order differential cross section, while the EW correction from the

annihilation channel obviously suppresses it, especially in the high energy phase-space region, due to the Sudakov effect. The

- and

-induced relative corrections are positive and insensitive to the transverse momenta of

, H, and their decay products. These photon-induced corrections compensate the negative

-initiated EW correction, and become the dominant EW contribution as the increment of the

colliding energy. The parton shower (PS) effects on kinematic distributions are not negligible. The relative PS correction to the b-jet transverse momentum distribution can exceed 100% in the high

region. Moreover, we investigate the scale and PDF uncertainties, and find that the theoretical error of the

-corrected integrated cross section mainly originates from the renormalization scale dependence of the QCD correction.
Improved eikonal approach for charge exchange reactions at intermediate energies *
Authors: Li Jing-Jing , Pang Dan-Yang , Ye Yan-Lin , Lou Jian-Ling , Yang Xiao-Fei , Liu Yang , Yang Biao
Published: November 2019

In order to describe charge exchange reactions at intermediate energies, we implemented as a first step the formulation of the normal eikonal approach. The calculated differential cross-sections based on this approach deviated significantly from the conventional DWBA calculations for CE reactions at 140 MeV/nucleon. Thereafter, improvements were made in the application of the eikonal approximation so as to keep a strict three-dimensional form factor. The results obtained with the improved eikonal approach are in good agreement with the DWBA calculations and with the experimental data. Since the improved eikonal approach can be formulated in a microscopic way, it is easy to apply to CE reactions at higher energies, where the phenomenological DWBA is a priori difficult to use due to the lack, in most cases, of the required phenomenological potentials.
Constraining the anisotropy of the Universe with the Pantheon supernovae sample *
Authors: Chang Zhe , Zhao Dong , Zhou Yong
Published: November 2019

We test the possible dipole anisotropy of the Finslerian cosmological model and the other three dipole-modulated cosmological models, i.e. the dipole-modulated ΛCDM, wCDM and Chevallier–Polarski–Linder (CPL) models, by using the recently released Pantheon sample of SNe Ia. The Markov chain Monte Carlo (MCMC) method is used to explore the whole parameter space. We find that the dipole anisotropy is very weak in all cosmological models used. Although the dipole amplitudes of four cosmological models are consistent with zero within the

uncertainty, the dipole directions are close to the axial direction of the plane of the SDSS subsample in Pantheon. This may imply that the weak dipole anisotropy in the Pantheon sample originates from the inhomogeneous distribution of the SDSS subsample. A more homogeneous distribution of SNe Ia is necessary to constrain the cosmic anisotropy.
Free fermions with a localized source
Authors: Krapivsky P L , Mallick Kirone , Sels Dries
Published: November 2019

We study an open quantum system of free fermions on an infinite lattice coupled to a localized particle source. In the long time limit, the total number of fermions in the system increases linearly with growth rate dependent on the lattice geometry and dimensionality. We express the growth rate in terms of lattice Green functions and derive explicit formulae in one dimension and for the square lattice. The interplay between the dynamics and the coupling to the environment leads, in contrast to classical systems, to a non-monotonic dependence of the particle growth rate on the input rate. We show that for all lattices the particle growth rate is inversely proportional to the input rate when the latter becomes large. This is a manifestation of the quantum Zeno effect.
Indigenous knowledge in utilizing natural resources in batik as sustainable development in Kebon Gedang district of Ciwaringin Cirebon
Authors: Putri D P
Published: November 2019

This study aims to find out the indigenous knowledge of the Ciwaringin society in managing natural resources for sustainable development as an indigenous identity. The research method used in this study is a qualitative approach. Data were obtained through field observations and direct interviews with the indigenous society and five artisans. The results showed that the majority of Ciwaringin society was batik artisans who only painted batik produced in this region. In coloring process of batik, dyeing and painting techniques are used. Natural dyes are obtained from the bark, rind, and leaves that are easy to find. Indigenous knowledge is only popular among craftsmen who acquired initially from the ancestors. This coloring technique is reused by 85% of craftsmen and become a uniqueness of Ciwaringin batik. Although the production process of a sheet of batik cloth is longer than the use of synthetic dyes, it increases the selling price. Besides, this method is believed to reduce the risk of environmental pollution. This step supports the creation of sustainable development. It is hoped that the values of indigenous knowledge can be used as references and enrich scientific knowledge and become constructive thinking contributions to formulate policies of environmental management and conservation.
Study of vegetable waste product as alternative artificial feed to life cycle of Hermetia illuncens
Authors: Sanjaya Y , Suhara  , Nurjhani M , Halimah M , Shintawati R
Published: November 2019

Research about artificial food and life cycle of Hermetia illucens was conducted. Alternative of organic animal feed is definitely needed cause its safe, cheap and healthy. A descriptive research was conducted by investigate H. Illucens fecundity, and life cycle with alternative feed contain of bran leftover vegetables and milk. The result showed that female fecundity was resulting 750 eggs per day on average. Length of the life cycle is 29 - 41 days. Range of first larvae is 1-2 days with 0,1-0,3 cm in length. range the second larvae is 4-6 days with 0,4-0,6 mm in length, the third instar is around 7-10 days with 0,65-1,0 cm in length, fourth Instar is around 11-13 day with 1,1-2,4 cm in length. BSF pre-pupae 2,1 – 2,5 cm in length with a range 15-23 days. BSF pupae 2,3- 2,4 cm in length with a range 24 -31 days. The adult is 29-41 days with 2,2-2,4 in length This show organic material can be turned into BSF biomass.
The effects of temperature on alpha-cellulose content and extraction result of tobacco stem
Authors: Handayani S S , Amrullah  , Fatimah H , Seftiani R
Published: November 2019

This research aims to obtain levels of cellulose and α-cellulose from the tobacco stems. Tobacco rods are extracted using several processes step, namely the Making of tobacco stem powder, powder characterization analysis, powder extraction with several temperatures, and FT-IR analysis. The results obtained at several temperatures showed that the highest cellulose yield was 76.25% with alpha-cellulose content of 82% at a temperature of 150°C.
Decision support system design for determining brown sugar quality with weighted product method
Authors: Taufik I , Saleh A , Slamet C , Maylawati D S , Ramdhani M A , Muhammad B A
Published: November 2019

Brown sugar is the result of processing the coconut juice with a distinctive taste, so that its use cannot be replaced by other types of sugar. The purpose of this research is to design of Decision Support System (DSS) using a Multi Attribute Decision Making (MADM) model by applying Weighted Product (WP) method to determine the quality of brown sugar. WP method was chosen because the problem in this research is a ranking problem. The WP method is able to select the best alternative from a number of alternatives and its superiority in weighting technique. This system is designed by using PHP and MySQL as the database programming language. This system can rank the brown sugar by calculating the criteria weight. The weight value is searched for each attribute, then conduct the ranking process to determine the optimal alternative, which is the best brown sugar and decent in terms of ranking. Based on the tests performed, a system capable to produce the best ranking in accordance with the calculations used, so that the system this can be speed up the selection of brown sugar.
Comparison of K-Nearest Neighbour and support vector machine for choosing senior high school
Authors: Irfan M , Nurhidayat A R , Wahana A , Maylawati D S , Ramdhani M A
Published: November 2019

The aim of this research is to compare K-Nearest Neighbour (KNN) and Support Vector Machine (SVM) algorithm which are used for choosing senior high school recommendation. As we know that education is an important aspect in the development of a nation. The methodology that used in this research is data mining through Knowledge Discovery in Database (KDD) stages, which consist of cleaning, data integration, data selection, data transformation, data mining, pattern evaluation, and knowledge presentation. KNN and SVM are the most common algorithms used in data mining and decision support system. Either KNN or SVM in this research used for classifying the type of senior high school by input parameters, among others national examination score, student interest, and counsellor suggestion. Based on the experiment with several training and testing data, the result shows that SVM is better than KNN. SVM has an accuracy value around 97.1%, while KNN has an accuracy value around 88.5%. And also, SVM has processing time faster than KNN.
Terrain model and gridding method variations for making topographic maps
Authors: Masri R M
Published: November 2019

The purpose of research were: (1) exploring gridding method for making topographic maps, (2) inventing terrain model that producing from 3D data, (3) structuring standard operational procedure for making topographic maps, (4) producing topographic maps from terrestrial surveying data, digital terrain model, computer aided mapping and satellite imagery, (5) evaluating topographic maps which produced. The research is using descriptive method. Universitas Pendidikan Indonesia was research location. The research was conducted on September 2017 to December 2017. Geometric calculation is used to calculate abscissa, ordinate and height information, using spreadsheet. Topographic map which was producing contour line from digital terrain model software, satellite imagery from internet, line map from computer aided mapping software could be more accurate and effective than conventional and analog method.
Railway geometric design based on satellite imagery and digital terrain model
Authors: Purwaamijaya I M
Published: November 2019

The purpose of research were (1) a conceptual, functional model designed and implementation for railway geometric design, (2) standard operational procedure made for railway geometric design using satellite imagery and digital terrain model, (3) calculated geometric information on the railway route so that fulfilling geometric national and international standard, (4) horizontal alignment drawing presented on the railway route, (5) vertical alignment drawing presented on the railway route. This research uses a descriptive method. Study location in South Sumatra Province, Indonesia. July 2016 to January 2017 is when conducting research. Calculation of horizontal and vertical geometry information using spatial analysis. Horizontal and vertical geometric calculated on railway route based on satellite image and digital terrain model could be faster, easier and cheaper than terrestrial and analog method.
The effect of uniaxial pressure on development on 3D fracture and its properties of clay cap rock on one potential geothermal area in Candi Umbul-Telomoyo, Semarang-Indonesia
Authors: Sumarni  , Feranie S , Ardi N D , Latief F D E
Published: November 2019

A Sample of clay cap rock on geothermal area in Candi Umbul-Telomoyo, Semarang has been digitized to the observe 3D fracture development due to the influence of uniaxial pressure. The 3D fractures were analysed using digital image processing and analysis method. The sample is an altered cases andesite breccia with diameter of 4.4 cm and height of 4.3 cm. The rock sample was collected from well at 590 m. The rock sample was given uniaxial pressure treatment of 59 bar, 75 bar, 91 bar, 107 bar, 123 bar and 156 bar. The results show that 3D fracture develops as pressure increase are total orientation {θ (P)}, aperture {e (P), fracture density {Φ (P)}, fracture intensity {I (P)} and fractal dimension {D (P)}. Total orientation and fracture intensity have polynomial to relative to the given pressure. Aperture and fractal dimension are linearly proportional to the give pressure, while the fracture density is exponentially proportional to the give pressure. The effect of increasing pressure to the safety of this geothermal clay cap was studied by conducting a continuous uniaxial compressive test on the sample. From this test, it is observed that the sample broken at the pressure of 478 bar.
The analysis of wasted grease amount towards filtering machine’s spinning rate
Authors: Nuraidah S , Aminudin A , Waslaluddin
Published: November 2019

Grease amount inside a food can influence human’s health. Grease amount in a food has correlation with cholesterol amount which could lead to various diseases, such like hypertension, stroke, diabetes, and cardiac arrest risk. This research purposed to characterize wasted grease amount of food towards various spinning cycle of grease filtering machine. Various methods could be implemented to decrease the grease amount in a food, potato chips. Using the influence of centripetal force by applying motors spinning rate became the method which was implemented in this research. Determining volume of wasted grease amount was done by scaling food before grease filtering process then re-scale after filtering process was done. In order to find out the volume of wasted grease was through a division between the mass of wasted grease with the density of grease which is 0.8 g/cm3. Examination result shows potato chips grease amount decreased up to 10%. Wasted grease amount towards linear spinning rate with 0.99 determination coefficient graph also found based on experiments implementation. The result of research determines for each 1 rpm increase from spinning cycle, the numbers of wasted grease amount is 10.9 grams.
Monitoring of rainfall infiltration to under surface using DC resistivity method
Authors: Ardi N D , Iryanti M , Agustine E , Asmoro C P , Yusuf A , Sundana A N A , Safura H Y , Fitri M , Anggraeni M , Kurniawan R , Afrianti R , Sumarni
Published: November 2019

The use of non-agricultural land in Universitas Pendidikan Indonesia causes the land absorption to be smaller than the use of soil for agriculture so that it can lead to surface runoff. This study discusses how to monitor rainwater infiltration to subsurface using resistivity method with Wenner’s configuration and weather data. The data retrieval takes place twice with a span of two months and is in the same place. In the model is also seen when the layer of purple rocks have decreased in volume from the first data retrieval on the second data retrieval. While the rain water infiltration layer more evenly. Monthly weather reference data showed that temperature and evapotranspiration relationships over the months showed the results from September to December were relatively stable with average temperatures of four months being 22.38 ºC and evapotranspiration was 5.02 cm / month. Therefore, the evaporation caused by all water, soil, vegetation and the earth’s surface located at the site is 5.02 cm / month. Monitoring of rainfall infiltration within two months from the first measurement having rainfall infiltration of 3.9 mm / h indicates that infiltration rate is very fast and the magnitude of evapotranspiration is 5.02 cm / month.
Instrumentation & control system for “SAMOP” reactor experimental facility
Authors: Syarip  , Rosyid M , Dewita  , Abimanyu A
Published: November 2019

The instrumentation and control system (ICS) for a subcritical assembly for molly-99 production (SAMOP) reactor experimental facility is presented in this paper. The system is designed based on the defense-in-depth concept. SAMOP reactor is fuelled by uranyl nitrate and driven by an external neutron source from Kartini reactor beam-port. The ICS was designed using 2 neutron detectors of fission chamber and compensated ionization chamber types and provided with a safety rod made from boral used for shutting-down the reactor in emergency condition. The method used for reactor protection system is based on hardwire with a fail-safe principle. The safety rod drive mechanism is designed by using rack and pinion, and provided by the safety button of key release and electromagnetic holder status.
Analysis of biomass briquettes based on carbonized rice husk and jatropha seed waste by using newspaper waste pulp as an adhesive material
Authors: Suryaningsih S , Resitasari R , Nurhilal O
Published: November 2019

Biomass waste that has not been utilized properly is rice husk and jatropha seed waste, and there is a future need for efficient utilization of these wastes. Rice husk is the outermost part of the rice seed, the rice milling process produced 20% - 30% of the waste as rice husks. Jatropha shell waste is a de-oiled part of jatropha seed after the oil extraction process for biodiesel production, and produced 70% of waste. As biomass, both materials are potential sources of carbon that can be utilized as an alternative energy sources such as bio-briquettes. The method used in this research is experimental method including drying of the biomass material sample, carbonization process, refine and filtration using 40 mesh sieve (420 μm). The composition of the selected charcoal mixture is 80:20 and 50:50, and the addition of the newspaper waste pulp as an adhesive material with variations of 8% and 12% by weight. Characterization is done by using the mass density test, proximate test and calorific value test. After going through pressure printing and drying process, the briquettes with 8% addition of newspaper waste pulp adhesives has the highest heat energy content, equal to 5,650 cal/g.
Student conception about the quality of packaged water
Authors: Nuryani H S , Rustaman N Y , Rochintaniawati D
Published: November 2019

Instead of a pure state, water on earth contains a variety of material, either dissolved or suspended, including microbes. Therefore, before being consumed, water should be processed first to reduce levels of contaminants to a save level. Standard of water quality for household need (Permen No.492/MENKES/PER/IV/2010) is usually used as a reference for drinking water requirement. This preliminary study was carried out to investigate students’ conception of packaged/bottled water quality assurance produced by certain vocational schools as products of their students. The explanatory survey method was used in this study to detect their conception deeply. The respondents or participants of this study was ten graders from a public vocational school in Subang and their teachers in Agribusiness course. Data were collected through observation, interview, and test for their preconception. Research results show that students’ knowledge about mineral water is not in line with their understanding of the water quality, and their teacher’s as well.
Analysis of student difficulties based on respondents ability test on the topic of geometry molecules
Authors: Nugraha M , Supriatna A , Fatimah S S
Published: November 2019

In this research, the comprehension levels and students difficulties on the subject of molecular geometry were determined via respondents ability test. This test consist of five items designed specifically to detect what the students think. One problem has several options, each of which has an indicator of learning difficulty so that when the student selects one of these options, the researcher can immediately detect the difficulties that the student has. The students answer comes with a reason to avoid guess answers. The test was applied on 52 students of grade X. Analysis of test results using descriptive qualitative analysis. According to the findings obtained from the test, the students had numerous difficulties. It was found there are 7 kinds difficulties in geometry molecules material. The top three difficulties experienced by students are (1) 71% of students do not understand the meaning of the symbol of lewis where students describe in the form of covalent bonds; (2) 65% of students do not understand the influence of free electron pairs at geometry molecules; 31% of students do not understand the various types of geometry molecules when given the problem of placing between the name and geometry of the molecules. These results shown that students still do not understand the basic concept of geometry molecules, so that it is required further investigation to find out how to overcome student learning difficulties on the topic of geometry molecules.
First-year university students’ understanding of chemical equilibrium
Authors: Aini F Q , Fitriza Z , Gazali F , Mawardi
Published: November 2019

This study analyzed the understanding of first-year students on the concept of chemical equilibrium. It involved 30 first-year students in the faculty of mathematics and natural sciences of Universitas Negeri Padang. The students’ understanding was explored using a conceptual test. The result shows that generally, students have misconceptions about the concept of chemical equilibrium especially when the reaction reaches equilibrium as reported by many studies. The results of this study have implications for the lecturers in planning the general chemistry learning process, especially on the chemical equilibrium topic.
Development of Three Tier Multiple Choice Diagnostic Test to Assess Students’ Misconception of Chemical Equilibrium
Authors: Siswaningsih W , Nahadi  , Widasmara R
Published: November 2019

The aim of study was to develop the three-tier multiple choice diagnostic test that was conform with criteria of content validity and reliability to identification students’ misconception about chemical equilibrium. The method of this study was development and validation methods. Fourteen items were developed in this study. Based on the value of content validity ratio (CVR), all items were valid. The value of reliability of items were developed is 0.759, it means that items were acceptable. The respondents of this study were 5 validators who are lecturers from Department of Chemistry Education and 35 senior high school students’ who was learned subject chemical equilibrium. Based on analysis of students’ answer were based on a determination key could be found students’ misconceptions that on dynamic equilibrium, concentration of reactant and product are same as common misconception in the student (57.1%).
Learning how computer’s work with combining CS-Unplugged and Raspberry Pi
Authors: Soviani S , Kusnendar J , Prabawa H W
Published: November 2019

Almost from the beginning, computer science was hampered by the perception that computer science exclusively focused on programming. This results in computational-related learning being very limited and minimally taught to students. The widespread use of ICT tools in indirect learning has changed the way students interact with content. This paper presents a different approach, while keeping the teacher at the centre of control of classroom activities but students are given the opportunity to explore the content to be learned by CS-Unplugged and Raspberry Pi. This activity aims to provide basic knowledge about how computers work. One of the activities is a simulation and experimentation on how computers work through the CS Unplugged approach. The basic knowledge formed from the simulation was then used as the basis for assembling a simple computer using Raspberry Pi. Based on the results of observations and interviews conducted, the utilization of CS Unplugged provides a learning experience that builds on the initial concept of how computers work. This is shown by an increase in students’ motivation and enthusiasm in learning how the computer works. This experience is what then makes it easy for students to do various computer assembly experiments using Raspberry Pi.
Smart education: educational service system for equal quality education
Authors: Putra R R J , Putro B L
Published: November 2019

The problem of unequal quality of high school education in West Java with the viewpoint of Senior High School (SMA) due to the assessment of the quality of education in Indonesia is still focused on Students, Teachers, Principals, and Parents separately. Supposedly the assessors of high school quality are assessed based on an education service system (ESS). Research studies related to high school as an educational service are well suited to a service science approach, and the term educational service system. The ESS study discusses educational sector issues in the perspective of a service system consisting of components, functions, interfaces, component linkages, inputs, processes, and outputs. The purpose of this research is to create educational service system model to improve the quality of high school education services in West Java. Creation of ESS Model with service engineering method with stages: service innovation, service engineering, and service measurement. Output of Educational Service model System in the form of learning management system (LMS) based on Moodle. The prototype measurement result ESS model shows the efficiency of high school education service system. The research output is expected to solve the problem of equalization of high school education quality in West Java.
Creative learning model as implementation of curriculum 2013 to achieve 21st century skills
Authors: Putro B L , Waslaluddin  , Putra R R J , Rahman E F
Published: November 2019

The 21st century learning model is a way/technique used by teachers to facilitate the best child learning safeguard according to child’s condition, child’s learning environment, and carrying capacity. The characteristics of learner of the 21st century is important for teachers and parents to know how to facilitate their learning. Mitchel Resnick developed a Creative Learning Cycle method that promises to improve 21st century skills. Creative Learning Cycle method is suitable for elementary school. Creative Learning Cycle consists of 5 stages: Imagine, Create, Play, Share and Reflect. The purpose of this research is to create creative learning model as implementation of curriculum 2013 at elementary school in Bandung to reach 21st century skill. This study uses the correlation method between 21st century learning methods, 2013 curriculum, and 21st century skills. Creative Learning Model as a Learning Implementation of Curriculum 2013 has a positive effect on the achievement of 21st Century Skills students though not all of them have a significant influence.
Academic buoyancy of science student in senior high school: analysis and implications for academic outcomes
Authors: Mawarni A , Sugandhi N M , Budiman N , Thahir A
Published: November 2019

Academic buoyancy is a very important ability to be possessed by students in the face of the typical academic setbacks and challenges in the daily life of students at school, but in the development of academic buoyancy of students are still questionable. The purpose of this research is to find out the academic buoyancy of science students and to find out the academic buoyancy of science students based on gender and also age at high school level. This research uses mix methods approach with concurrent embedded strategy. The sample of research involves 289 students of science class XI of senior high school in Bandung City on Academic Year 2017/2018 using random sampling. The findings of the study showed that science students need to have higher academic buoyancy compared to other students, the male students of science have higher academic buoyancy than female students of science, and the science students who have higher academic buoyancy are at age of 18 and 15. These results are presented in an implication analysis for academic outcomes.
Empowering critical thinking skills with problem solving in higher education
Authors: Utami B , Probosari R M , Saputro S , Ashadi  , Masykuri M
Published: November 2019

Critical thinking skills are a necessary aspect of 21st century skills. Based on Facione, critical thinking skills include aspects of interpretation, analysis, evaluation, inference, explanation, and self regulation. The purpose of this study is to know the critical thinking skills of students with problem solving model in the scientific method course. The classroom-based action research was held in one of the science education programs in Central Java. Data sources are collected through portfolios, discussions and presentations and field observation records in the classroom. Student’s critical thinking skills were observed and analyzed. the result of the research shows with problem solving model of students’ critical thinking skill in interpreting, analyzing, concluding in very good category, and evaluating, explaining, and self-regulating in good category.
The reconstruction of preservice elementary teachers’ conception about free fall using cognitive conflict strategy
Authors: Anggoro S , Widodo A , Suhandi A
Published: November 2019

Misconception about Free Fall have many experienced by preservice elementary teachers. It was caused by their teachers has not understood these concepts and how to teach it. This study aim analyzed a conceptions reconstruction on remedial teaching using Cognitive Conflict Strategies developed about Free Fall concept. The research method used is mixed methods with Intervention Mixed Methods Design. The participants are preservice elementary teachers’ in one of private university in Central Java who take the Second Basic Concept course. The results have shown that Cognitive Conflict Strategy is effective to reconstructing the conception of preservice elementary teachers on Free Fall using remedial teaching. This is indicated by most of them have experienced conceptual change with the revision level in every misconception that occurred in the prior conception. The research recommendations are the lecturer of Basic Science, which have elementary school graduates background generally, should have to collaborate with Physics and Biology lecturer to develop a scientific concept understanding by using learning model that can reconstruct the student conception.
‘Surala Ninja!’: a mathematics e-learning based on learning management system as an alternative learning in elementary school
Authors: Marwati R , Fujihira T , Furuoka A , Yulianti K
Published: November 2019

e-learning based on Learning Management System (LMS) has contributed a lot to the education system. e-Learning based on LMS includes learning management, student management, evaluation management components, online practice, online material content, online assessment. ‘Surala Ninja!’ is a mathematics e-learning for elementary level. It will examine how ‘Surala Ninja!’ e-learning meets LMS components and how ‘Surala Ninja!’! LMS improves numeracy skills, trains mathematical thinking, embed learning characters, and compares it with the 2013 school curriculum. The results show that although ‘Surala Ninja!’ content and the low-level curriculum is sliced mainly, but ‘Surala Ninja!’ contains a lot of reinforcement and deepening of materials that not provided in school, so that LMS-based e-learning is an alternative for individual learning.