bluuebunny/crossref_metadata_2025 huggingface dataset:
Retrieving Surface Soil Moisture from Optical Satellite Imagery over Medan and Surrounding
Authors: Tampubolon Togi , Juliani Rita , Hutahean Juniar , Yanti Jeddah
Published: May 2020

The Earth’s environmental surface have change in local, regional and also global scale in any environmental parameter. Medan, one of big city or region in Indonesia, has fluctuated tropical climate in hydrological cycle. Soil moisture is a key variable in the hydrologic processes that play an important role in determining the availability of water as a fundamental element in human life. Soil moisture is an important parameter for many processes’ hydrology, biology and biogeochemistry. The aim of this study to integrated soil moisture over land area in Medan and surrounding. One of the existing methods to obtain information about soil moisture is Temperature-dryness Vegetation Index (TVDI). TVDI a drought index that is determined based on the empirical parameters of the relationship between surface temperature (TS) and vegetation index (NDVI). The index is associated with soil moisture and obtained only by the input of satellite remote sensing information. Dataset use Landsat 5 TM during 2005 to 1989, Landsat 7 ETM image for 2011, and Landsat 8 OLI for 2014 - 2016. Vegetation index value calculation using InfraRed band (4 to Landsat 5 TM and Landsat 7 ETM or 5 for Landsat 8 OLI) and Band Shortwave InfraRed (5 for Landsat 5 TM and Landsat 7 ETM or 6 for Landsat 8 OLI). The result will be classified from low to high value TVDI. TVDI maximum value each period of the years showed value above > 0.5 that means from moderate to high moisture. From the linear function of TVDI shows the decreasing soil moistures during those time period that assumes assumed the source of soil moisture decreasing conditions due to the surface runoff that resulting in a change in vegetation area and surface temperatures. Reduction of a soil’s capacity to accept, retain, release and transmit water reduces biomass productivity, whether of crops, pasture species, shrubs or trees.
Semiparametric Bootstrapping Forestimating Parameters in Krigingmodel for Deterministic Simulations
Authors: Simamora Elmanani , Susiana  , Widyastuti Eri
Published: May 2020

In practice, the parameters in the Kriging model are unknown, but they can be estimated based on the behaviour of the observed data. Parameters in the Kriging model can be estimated based on the consideration of Regression-Kriging models. Regression-Kriging models are Universal Kriging models with polynomials of degree zero (Ordinary Kriging), one (Universal Kriging with degree one), or two (Universal Kriging with degree two). A new method for estimating the parameters in the Kriging model with semiparametric bootstrapping is proposed in this paper. The semiparametric bootstrapping procedure works by combining the bootstrap method and Kriging.
Estrogen Receptor Alpha (ERα) Pvu II 397 T/C Related Genotypes and Alleles are Associated with Higher Susceptibilities of Endometriosis
Authors: Permatasari Vera , Saleh Muhammad Irsan , Nita Sri
Published: May 2020

Endometriosis is an estrogen dependent disease that is proved by its development in reproductive age and the decrease after menopause or ovariectomy. Endometriosis characterized by the growth of endometrial outside the uterine cavity, which is found in women with subfertility and pelvic pain problems. Effect of the estrogen hormone depends on the binding to its receptor. Estrogen receptor alpha (ERα) polymorphisms which admit by Pvu II enzyme restriction has associate to some women’s disease like endometriosis. This Study aimed to determine the correlation between ERα 397 T/C with the risk of endometriosis. There were 70 samples which were divided into 2 groups: 35 cases (endometriosis group) and 35 controls (non-endometriosis group). The determination of genotypes and allotypes used PCR-RFLP method and the data analysis by chi square test α<0,05.The results showed that genotype frequencies of case group are 11,4% TT, 54,3% TC and 12% CC while genotype of control group are 34,3% TT, 51,4% TC and 14,3% CC with p value 0,032. Allele frequencies of case group are 38,6% T and 61,4% C while control group are 60% T and 40% C with p value 0,011. Conclusion: there is a significant correlation between the genotype and allele polymorphism of ERα gene 397 T/C with the risk of endometriosis.
Analysis of Competency Level for Wave Science in General Physics-Based on Literacy Science in PISA
Authors: Sahyar  , Bunawan Wawan , Yanti Jeddah
Published: May 2020

PISA competency framework has been gained global recognition from 2006 and was developed until the latest version in 2015. PISA competency emphasis is classified into three competencies standard, such as explaining scientific phenomena, evaluating and designing scientific inquiry, and interpreting scientific data and evidence, finally, summarizing research findings. All of the PISA’s standard competency is reflected in each of the three types of knowledge that consist of content knowledge, procedural knowledge and epistemic knowledge. PISA science assessment is based on science literacy. This article will analyze the three competencies of PISA science literacy determined by each knowledge in basic physics topics: wave. Furthermore, the subject matter refers to wave phenomenon, types of wave, the magnitude, the formula, superposition of wave, reflection and refraction, resonance, and the energy of wave.
Inventory of Pitcher Plant (Nepenthes sp.) and Its Existence in North Sumatra Indonesia
Authors: Nainggolan L , Gultom T , Silitonga M
Published: May 2020

Nepenthessp. is a carnivorous plant with unique shape and color shades. This unique plant has a special leaf modification called a pitcher which has the capability in catching insects and small animals. The purpose of this research was to know the types and habitat ofNepenthessp. that found in six regencies in North Sumatra. The pitcher plants inventoried from South Tapanuli, Central Tapanuli, Humbanghasundutan, Toba Samosir, Dairi and Samosir regency in North Sumatra. The research type and method were conducted by descriptive qualitative and survey method research. The morphology data ofNepenthessp. used to identify the types ofNepenthessp. in North Sumatra. Inventory result ofNepenthessp. from six regency showed that there were five original species in North Sumatra namelyNepenthes tobaica,Nepenthes gracilis,Nepenthes ampullaria, Nepenthes eustachya,Nepenthes rhombicaulisand one natural hybrid speciesNepenthes reinwardtiana x spectabilis.Nepenthes tobaica,Nepenthes gracilishad upper and lower pitchers whileNepenthes ampullaria,Nepenthes eustachya,Nepenthes rhombicaulisandNepenthes reinwardtiana x spectabilisjust had an upper or lower pitcher. All species lived in low or high lands and most of them found in peat area, high humidity, and high light intensity.
Development of Stirling Engine Based Thermodynamics Tools
Authors: Hasanah Uswatun , Rahmatsyah  , Ginting Eva Marlina
Published: May 2020

A Stirling engine is a heat engine that operates by cyclic compression and expansion of air or other gas (the working fluid) at different temperatures, such that there is a net conversion of heat energy to mechanical work. In the results of stirling engine experiments obtained that the influence of temperature on the speed of turning the wheel (Rpm) where the more heat the temperature is given, the greater the speed of turning the wheel produced. At a power crank distance of 3.6 cm, the resulting linearity value of 99% is obtained, at a power crank distance of 0.05 cm the linearity value of 98.69% is obtained while at the minimum distance the resulting linearity value of 98.51% is obtained. The effect of the distance of the power crank also affects the rotating speed of the wheels (Rpm) and the generated electrical energy.
Hotel Content-Based Recommendation System
Authors: Wahyudi Kristian , Latupapua Johanes , Chandra Ritchie , Girsang Abba Suganda
Published: May 2020

Content based recommendation system tries to recommend items similar to those a given user has likely in the past, whereas systems designed according to the collaborative recommendation paradigm identify users whose preferences are similar to those of the given user and recommend items they have liked. The proposed recommendation system is discussing about Data finitihotel recommendations for a place across U.S. The selected process for the recommendation is calculating the rating of hotel categories on the city. By calculating hotel categories from several city by combining two features namely categories and taken from the city of the selected hotelcategory as well. The result of process will be recommended hotel with highest ratingto the user.
Syntesis Conductive Polymer from Polypyrrole (PPy) Based Assisted by Polyvinyl Alcohol (PVA) Through Batch Polymerization Technique
Authors: Elita Hafizah M A , Kissinger F , Manaf A , Suparno  , Andreas
Published: May 2020

Polypirrole (PPy) is one of conductive polymer material has been success sinthesized through polymerization process using chemical oxidative reaction by batch polymerization technique. The synthesis was conducted at room temperatur with agitation speed within 300-500 rpm. The certain amount of pirolle monomer was reacted with ammonium persulphate in the aquaeous media. Demineralized water is the only one solvent was involved in the reaction. The presence of 0%, 1% and 2% of Polyvinyl alcohol (PVA) in the synthesis of PPy was investigated. Washing process found maximal after four times washing indicated by FTIR spectrum, phisical appearance, color and conductivity value of the filtrate of residual washing treatment. While the synthesized PPywith presence of PVA obtained higher conductivity compare when PVA free. The conductivity value was 57,000, 56,000 µs/cm for additional 1% and 2% of PVA respectively. It is significantly increased when PVA free involved in the reaction. Other supporting characterization during synthesis was conducted such as pH measurement, density, viscosity, temperature and colour degradation observation. The appearance of PPy when presence PVA is being emulsion and different when absence of PVA which obtained powder or solid form of PPy. Black polymer emulsion with various viscosity of PPy was observed completely.
Science Process Skills Improvement in Medan High School Students Through Inquiry Training Learning Model
Authors: Solikin  , Derlina  , Bukit Nurdin
Published: May 2020

This study aims to improve students’ science process skills that learned by inquiry training learning model. This study is quasi-experimental. The study population were students of class XI SMA Al Fityan Medan. Sample selection is done randomly to randomize the class. The instrument used is a sheet consisting of science process skills such as observation checklist sheet. The results of this study stated that students’ science process skills can improve through the inquiry training learning model through its phases.
Power plant life cycle cost management framework: a literature review
Authors: Wibawa Agus , Ichsani Djatmiko , NurYuniarto M
Published: May 2020

Today, the power plant industry has to operate in the stricter environment, safety, and standards. Hence a power plant needs to address those problem by implementing a sound and good asset management practice to ensure level of power plant performance set are met. Usually the power plant performances set by company are difficult to be met by aging power plants. They are hardly capable of delivering the requested performance due to their operational age. Several questions are raised to deal with the aging power plant such as should the power plant be maintained, improved and or discarded? Those questions are difficult to be answered as for any power plant there were great deal amount of money has been involved since the very beginning of power plant construction until their operation stage. Due to this fact a novel approach on how to deal with the problems is proposed in this paper. A novel framework of assets management will be developed by considering many factors and criteria of power plant performance related to efficiency reliability and economics aspect of the power plant through its entire life. The framework is called as Holistic Operation and Maintenance Excellence (HOME). In this paper, the authors would like to present literature survey related to the HOME framework. It is expected that the will be proposed HOME framework will be capable of dealing with problems raised previously based on the works in the power plant asset management previous research reported in this paper. The HOME framework objectives are integrating power plant asset management, finance (cost), and technical aspect such efficiency, reliability as a guide to make decision during it is service life. The LCM framework to optimize power plant asset in term of fuel, operation and maintenance was provided. Potential gap has been discussed and proposed for next research.
The Basic Acid Scientific Experiment Video and the Separation of Mixed-Based Information Technology
Authors: Ginting Syahfitriani , Sahyar Sahyar , Sudrajat Ajat
Published: May 2020

This research results in a video of scientific experiments worthy of use, resulting in a video of scientific experiments that is practical to use. The video is a video-based scientific experiment and a mixture of information technology. The development model in the study uses the Borg & Gall development model which is adapted into a simple model. The results showed the validation of material experts with very decent categories, media experts with very decent categories, small group tests with very practical categories, and field trials with categories very practical.
The Effectiveness of Natural Science Modules Based on Guided Inquiry Method in Elementary School Learning
Authors: Yani Fitri , Bukit Nurdin , Manurung Sondang R.
Published: May 2020

This research is kind of development research (Research and Development) which aims to determine the effectiveness of natural science modules based on guided inquiry method that is developed. The development of natural science modules use ADDIE theory (Analyze, Design, Development, Implementation, and Evaluation). Analyzing data using descriptive qualitative technique that expressed in students score and score scale category. This development research produces products that meet the eligibility requirements with the results of the validation of the material declared very effectivity and the designer is effective and the linguist is declared suitable at this theory. The results are students give a good response of natural science module based on guided inquiry method while the teacher gives a good response on it and the method is effective.
Callus Induction of Mangosteen (Garcinia mangostana L.) In Vitro with Addition of Growth Regulators
Authors: Astuti Ririn Dwi , Harahap Fauziyah , Edi Syahmi
Published: May 2020

This research was conducted to determine the best combination of plant growth regulators on callus induction of shoot explants mangosteen (Garcinia mangostana L.). The research used complete randomized design (CRD) which is consisting of 12 treatments with 3 times repetitions. The parameters observed were time of callus formation, callus texture, callus color, callus pile height, callus surface area, callus weight, and callus performance. Data was analyzed by using ANOVA, and DMRT as follow up. The result showed that addition of plant growth regulators have effect on callus induction of shoot explant mangosteen (Garcinia mangostana L.). The best concentration and composition of media for induction of mangosteen callus is by giving sucrose 1,5 g / L + 2,4D 3 ppm because it was able to produce callus with the fastest time with a compact texture and color that is identical to green and white. The callus has 0.67a cm in height, 1.70a cm2 in width, and 0.51a g in weight. The callus performance is growing all over the surface.
The Profile of Pempek as a Determining Factor of Quality, Originality and Ethnicity
Authors: Supriadi A , Saputra D , Priyanto G , Baehaki A , Pambayun R
Published: May 2020

Pempek is a traditional ethnic food originated from Palembang, South Sumatra, Indonesia. Currently, there is not exist any profiles which could be used as a determining factor for quality, originality, and ethnicity of pempek. The objective of this research was to obtain the chemical profile of pempek as a determining factor of quality, originality and ethnicity. The samples were collected from the ten famous branded vendors in Palembang. The fish used in making pempek of the samples are snake head fish, Spanish mackerel, and the mix of snake head and Spanish mackerel. The type of pempek used in this experiment was steamed cook pempek lenjer (cylindrical) type. The analysis was performed at a KAN accredited laboratory. It was found that the energy content of pempek used in this experiment was in the range of 125 to 160 kkal/100 g sample and all the pempek used had a 0% of fat. All pempek used had 17 types of amino acid, and all of them had an essential amino acid. The significant finding was that the concentration of glutamic acid was 200% of the concentration of common concentration which indicated that all the vendors used artificial mono-sodium glutamate to improve the taste of pempek. It was concluded that the chemical profile found on this research could be used as database for creating a standard of identity of pempek.
Development Of Interactive Multimedia Lectora Inspire Problem Based On Science
Authors: Hikmi R , Simorangkir M , Sudrajat A
Published: May 2020

This research is a type of research development Research & Development (R&D) using the ADDIE model with quantitative and qualitative approaches applied in schools. This study aims to develop multimedia Lectora Inspire Problem Based in the field of science, knowing the feasibility of using multimedia, knowing the user’s response in using the multimedia. Based on the testing of the feasibility of the multimedia and the field of science carried out by 2 material expert validators and 1 multimedia expert validator, it was found that the multimedia Lectora Inpire developed according to experts was declared feasible and could be used as multimedia learning in the field of science.
Coastal waste bank as a waste processing effort towards a clean and productive Bagan Deli
Authors: Siregar Etti Sartina , Jamilah It , Muhammad Farchan , Saragih Apnila Putri , Sri Hastuti Liana Dwi
Published: May 2020

Trash is still a problem that the solution still continues to innovate until now. Based on information by the Ministry of Environment and Forestry (KLHK), the Republic of Indonesia has released a list of cities in Indonesia based on its cleanliness level. The Deli River is one of the garbage prone spots, and the waste will accumulate and surely will pollute the environment, all garbage is in the downstream or middle, all will be down to Bagan Deli village which eventually all the garbage will be Sources of pollution and disease for communities in Bagan Deli village. Programs with waste banks have been encouraged, but the management and facilities are still lacking, with community service is expected to understand the importance of maintaining environmental hygiene and utilizing waste as a source of and able to manage the waste bank as a new search eye, sorting based on the categories of till that are more detailed and specific so as to provide convenience during the presses, also will be made miniature garbage bank counter to Well-coordinated fitting management. The result of the Survet shows the level of customer satisfaction of the Trash bank belongs to the category quite well, and need some evaluation for the improvement of Waste Bank. The last will be created special training on how to create another pilot waste bank in other environment in the Kelurahan Bagan Deli
In Vitro Multification of Dendrobium sp. with Plant Growth Regulator
Authors: Harahap Mislah S. , Harahap Fauziyah , Edi Syahmi , Rosmayati
Published: May 2020

Orchids are plants that has aesthetic value and high economic important. Included to ornamental plant whose existence is diminishing and endangered. To preserve this plant, it needs to in vitro thchnique. The aim of this study was to determine the best interaction of growth regulator Benzyl amino purine, coconut water and the interaction of both multiplication of Dendrobium sp. The research method used a completely randome design with various concentrations of Benzyl amino purine (BAP; 0,1,2,3 mg/L) and coconut water concentrations (0%,5%,10%). The parameter observation are number of buds, leaves and roots. The data were analyzed descriptively and inferentially with ANOVA. The results shows the real effect of BAP interaction, between coconut water buds and leaves, but did not significantly affect the number of roots. Within 12 weeks of observation the highest number of buds and leaf obtained from a combination of 5% coconut water + BAP 0 mg/L were 12.00 and 5.00. The lowest number of buds and leaves was obtained in combination of 5% coconut water + BAP 2 mg/L, 6.00 and 1.00.
Estimation Remaining Reserves Amount of Crude Oil and Gas on the Well X by using Volumetric Method
Authors: Ibrahim Eddy , Yusuf Maulana , Bakar Sidik Muhammad Abu
Published: May 2020

Volumetric is one method of calculating oil and gas reserves in reservoirs that have been used in the oil industry until now. Data sources which become the main requirements in using this method are basic data such as log data, core rocks or side terraces, area estimates, Rf and fluid properties. This method is used to obtain a forecast of the remaining reserves of Well X for future use. Based on the data limitations in Well X there is only Logging (thickness) data whose range is between 650 m and 700 m, the recovery factor is assumed to be 100% and the area of distribution of wells in one block is 13 km2. From the results of calculations using the volumetric method, the remaining reserves in well X are 320,853.63 STB and the remaining natural gas is 1,801,539.11 SCF.
Enhancement of Magnetic and Microwave Absorbing Properties of [Ba (Fe, Mn, Ti)12 O19]1-x–[CoFe12 O4] x (x = 0.2; 0.5; 0.8) Composites
Authors: Darmawan L. , Suparno  , Manaf A.
Published: May 2020

In this paper, we report magnetic and microwave absorbing properties of magnetic based nanocomposite, which synthesized through mechanically alloyed the magnetic crystalline powders. The first component of composite was Mn-Ti doped Barium hexaferrite(BaFe12O19) or BHF obtained through a mechanical alloying process which was mixed with the second component of mechanically alloyed the CoFe2O4magnetic compound to form composites of [Ba (Fe, Mn, Ti)12O19]1-x–[CoFe2O4]x (x = 0.2; 0.5; 0.8) compositions. Prior to composite the two magnetic components, the remanence and saturation magnetization of the components were obtained optimally. Before Mn-Ti doping, the BHF has remanence (Mr) and saturation magnetization 0.206 T and 0.42 T respectively, with the corresponding coersivity (Hc) was 263.1 kA/m. On the other hand, CoFe2O4 (CFO) which has a high saturation magnetization(0.48 T) but with a low coersivity(16.22 kA/m). In form of magnetic composite, the high remanence was almost retained, but with the coersivity value decreased further to the lowest 80.82 kA/m. These two main properties (high remanance and low coersivity) were led the composite being good candidates for microwave absorbing materials. Microwave absorbing characteristics of [Ba(Fe, Mn, Ti)12O19]1-x–[CoFe2O4]x (x = 0.2; 0.5; 0.8) composites were discussed in this paper relation with their corresponding magnetic properties for designing the best microwave absorbing materials.
The Effect of Service Quality toward Customer Satisfaction of Go-Jek Online Transportation: A Case Study of Students at Syiah Kuala University, Indonesia
Authors: Amiruddin  , Nazaruddin  , Jamil T.M. , Andika Yessi Hajri
Published: May 2020

This study aimed to determine the service quality and customer satisfaction of GO-JEK online transportation. This research used quantitative descriptive methods. After doing the literature and field reviews, the data in this study collected through questionnaires totaling 86 respondents. The sampling technique in this study used the incidental sampling technique. Data analysis techniques used were simple linear regression, correlation coefficient, determination, t-test to test and prove the research hypothesis. Based on the results of data analysis, the results of the study showed correlation 0.634, which means the strong correlation between variables of service quality with customer satisfaction variables. The coefficient of determination showed the effect of service quality on customer satisfaction of 0.796 or 79.6%. Furthermore, the t-test at the 5% significance level of the hypothesis was accepted, evidenced by the probability value. The conclusion from this study is that there is an influence between service quality and customer satisfaction. If the service quality provided is good, it will create customer satisfaction.
Application of Concept Physics in the Aceh Culture
Authors: Silvini Yaumil , Derlina  , Ginting Eva Marlina
Published: May 2020

Physics is the science that studies an object, and interactions between objects, also studies natural phenomena that include matter, space, and interactions between humans. Human interaction is related to culture and customs that are inherent in people’s lives. Every region in Indonesia has different customs and customs in the community. Aceh is one area that has diverse customs in the way of making food, playing games and using its musical instruments. The culture of people’s original knowledge relating to scientific physics knowledge is called ethnoscience. The study examines, analyzes the application of the concepts of temperature and heat and impulse momentum in Aceh culture. The method used is a literature study with study materials including (1) the cultural art game of Aceh kekuriken, (2) The typical food of Aceh tribe Pisang sale.
Static Fluid Matter Physics Experiment in High School-Based Scientific Inquiry
Authors: Siregar Yenni Amalia , Ginting E Marlina , Sirait Makmur
Published: May 2020

The purpose of this study was to design experimental models scientific inquiry the static fluid material which consists of four phases, [1] presenting the problem to the students, [2] the students to formulate the problem, [3]students identify problems in the investigation, [4] students find ways to overcome the difficulties. Experiments conducted by students aiming to improve student inquiry. Where the assessment results student experiment on the experiment I according to the phase [1] presenting the problem to students 71.87% [2] students to formulate the problem 79.10 [3] students identify problems in the investigation 81.23% [4] students find ways to overcome adversity 84.33%. That aspect of the investigation abilities of student based on the average value in each experiment increased.
The effects of mass variation potassium chloride (KCl) on characteristics of nanosilicone from natural sand through the magnesiothermic method
Authors: Agusman Rizky , Andriayani
Published: May 2020

Synthesis of Nanosilicon has been carried out from Natural sand with magnesiothermic method. Silica of natural sand was extracted by NaOH 10 N and HCl 6 N. Ultrasonication of silica with KCl has been done with a ratio of SiO2:KCl (1: 7.5 and 1: 12.5). Continuosly, silica converted to nanosilicon by using magnesiaothermic method with a ratio of SiO2: Mg 1: 2 heated up to 800ºC for 6 h. Nanosilicon was purified with deionized water and ethanol, HCl 5 N and HF 10%. The results of XRD analysis of nanosilicon of ratio of SiO2:KCl (1: 7.5 and 1: 12.5) each 88.8% and 73.0% by using Match aplication. The distribution of particle sizes were determined by using Scherrer’s equations 28.56 nm - 170.57 nm and 12.70 nm - 93.32 nm.
Eu3+ ions doped SrO-CaO-Li2O-B2O3glasses foroptical display material application
Authors: Venugopal A.R. , Kaewkhao J. , Abhiram J , Rajashekara K M , Rajaramakrishna R. , Pramod N. G. , Rao Chethan
Published: May 2020

The glass systems with composition 20SrO-5CaO-40Li2O-(35-x) B2O3-x Eu2O3 (x = 0.3, 0.5 and 1 mol%) glasses were prepared by melt quenching technique to study absorption and luminescence properties and understand their lasing properties. Thepresent work reports the studies on Physical, Optical and luminescence properties of the prepared glass systems. The photoluminescence (PL) intensity of the glass increases with increase in Eu2O3 content up to 1mol%. The increase in the density and decrease in molar volume reveals the close packing of glass network. For Eu3+ emission the most intense red emission has been observed at the wavelength of 614nm for the transitions5D0 →7F2. The phonon energy was measured from phonon side band spectra which showed 1280cm−1, typical value for the borate glasses. Luminescence intensity ratio and lifetime analysis has been measured and discussed in the present work. The present glasses are very near to reddish orangeregion and thus can be key entrant for optical display device applications.
Classification of Seismic Signal by Evaluating Broadband Networks Station in Sumatera Fore-Arc
Authors: Sinambela Marzuki , Tarigan Kerista , Humaidi Syahrul , Situmorang Marhaposan
Published: May 2020

Classification of seismic signal waveform is an essential component to realize the characteristics of the signal. The processing of the waveform signal is broadly used for the analysis of the real-time seismic signal. The numerous wavelet filters are developed by spectral synthesis using machine learning python to realize the signal characteristics. Our research aims to generate the performance of seismic signal and processing the waveform from Broadband Network Station by using Wavelet-Based on Machine Learning. In this case, we use Continuous Wavelet Transform (CWT) on Morlet. CWT is also clearly to identify spectral amplitudes and frequency-energy from the component of signal seismic performed by Broadband Network in Indonesia. The characteristic of the digital broadband network in Indonesia is variance. Our project tries to classification and evaluate the Broadband Seismic Network which deployed in Sumatera Region, Indonesia by using Power Spectral Density Probability Density Function (PSDPDF).
The Effects Of Sodium Hydroxide Concentrations on Synthesis Of Carboxymethyl Cellulose From Bacterial Cellulosa
Authors: Nurfajriani  , Pulungan A. N , Yusuf M , Tampubolon M. D , Bukit N.
Published: May 2020

This investigation aimed to create Carboxymethyl Cellulose (CMC) from the nata de coco cellulose. The nata de coco was produced by fermentation method of coconut water used acetobacter xylinum. Bacterial cellulose (BC) was isolated by furification nata de coco with 1% NaOH and 1% acetic acid solutions respectively. In the process of making CMC, dried BC was immersed in isopropanol medium, then alkalised with 10%, 15% and 20% NaOH solutions respectively for 1 hour at a temperature of 55 oC. Then BC reacted with 18 grams of chloroacetic acid. FTIR analysis results show that CMC was successfully synthesized from BC. The increase in NaOH concentrations in the CMC preparation caused an increase in the degree of substitution (DS). DS is one of the main parameters of the success of the CMC synthesis process from the initial raw material for cellulose. At a concentration of 20% NaOH, the resulting CMC synthesized with DS 0.743 was better than 10% NaOH with DS 0.371.
Development of Economic Learning E-Modules Based on Inquiry to Improve Economic Learning Outcomes at First Public Senior High School in Kutalimbaru T.A 2019/2020
Authors: Maya  , Situmorang Julaga , Mursid R.
Published: May 2020

This study aims to: (1) Produce inquiry-based economic learning e-Modules that are feasible to be developed to improve economic learning outcomes, and (2) to determine the effectiveness of inquiry-based economic learning e-Modules that are developed can improve economic learning outcomes. This type of research is development research that uses the R&D model of Borg and Gall combined with Dick and Carey’s instructional design model. The research method consists of two stages: the first stage is developing e-Module learning media and conducting a feasibility test, then the second stage is testing the effectiveness of the product.
The Influence of Learning models and Cognitive Styles on Geography Learning Outcomes in SMA N 2 Percut Sei Tuan
Authors: Bay Sinaga Zuilen V , Abdul Hamid K , Sugiharto
Published: May 2020

This study aims to: (1) Know the learning outcomes of students who are learning gography learning with problem based learning models and STAD learning models (2) to find out the geography learning outcomes of students who have independent cognitive styles, and dependent cognitive styles (3) know the interactions between learning models with cognitive styles in influencing student learning outcomes in geography. This research is a quasi-experimental research. Student learning outcomes taught by the problem based learning model are higher than students who are taught with the STAD learning model
Development of E - Learning Based “SMILE” Learning Model to Improve Economic Learning Outcomes of Class X Students of Senior High School 1 Pahae Jae 2019/2020
Authors: Butar-Butar Dwi Fany , Napitupulu Efendi , Ampera Dina
Published: May 2020

This study aims to: (1) Produce learning models that are feasible to use, easy to learn and can be used for learning (2) to determine the effectiveness of learning models based on E-learning. This research is a type of development that uses the product development model Borg and Gall and combined with the model’s learning design Dick and Carey. The method used in this study is a quasi-experimental method. The results of the hypothesis test study prove that there are significant differences between economic learning outcomes that are learned using the E-learning “SMILE” learning model with economic learning outcomes that are learned using inquiry learning models.
Fractal mechanism of basin of attraction in passive dynamic walking
Authors: Okamoto Kota , Aoi Shinya , Obayashi Ippei , Kokubu Hiroshi , Senda Kei , Tsuchiya Kazuo
Published: May 2020

Passive dynamic walking is a model that walks down a shallow slope without any control or input. This model has been widely used to investigate how humans walk with low energy consumption and provides design principles for energy-efficient biped robots. However, the basin of attraction is very small and thin and has a fractal-like complicated shape, which makes producing stable walking difficult. In our previous study, we used the simplest walking model and investigated the fractal-like basin of attraction based on dynamical systems theory by focusing on the hybrid dynamics of the model composed of the continuous dynamics with saddle hyperbolicity and the discontinuous dynamics caused by the impact upon foot contact. We clarified that the fractal-like basin of attraction is generated through iterative stretching and bending deformations of the domain of the Poincaré map by sequential inverse images. However, whether the fractal-like basin of attraction is actually fractal, i.e., whether infinitely many self-similar patterns are embedded in the basin of attraction, is dependent on the slope angle, and the mechanism remains unclear. In the present study, we improved our previous analysis in order to clarify this mechanism. In particular, we newly focused on the range of the Poincaré map and specified the regions that are stretched and bent by the sequential inverse images of the Poincaré map. Through the analysis of the specified regions, we clarified the conditions and mechanism required for the basin of attraction to be fractal.
Attribution of historical near-surface permafrost degradation to anthropogenic greenhouse gas warming
Authors: Guo Donglin , Sun Jianqi , Li Huixin , Zhang Tingjun , Romanovsky Vladimir E
Published: May 2020

Given the current confirmed permafrost degradation and its considerable impacts on ecosystems, water resources, infrastructure and climate, there is great interest in understanding the causes of permafrost degradation. Using the surface frost index (SFI) model and multimodel data from the fifth phase of the Coupled Model Intercomparison Project (CMIP5), this study, for the first time, investigates external anthropogenic and natural forcing impacts on historical (1921–2005) near-surface permafrost change in the Northern Hemisphere. The results show that anthropogenic greenhouse gas (GHG) forcing produces a significant decrease in the area of near-surface permafrost distribution at a rate of 0.46 × 106 km2 decade−1, similar to observations and the historical simulation (ALL). Anthropogenic aerosol (AA) forcing yields an increase in near-surface permafrost distribution area at a rate of 0.25 × 106 km2 decade−1. Under natural (NAT) forcing, there is a weak trend and distinct decadal variability in near-surface permafrost area. The effects of ALL and GHG forcings are detectable in the observed change in historical near-surface permafrost area, but the effects of NAT and AA forcings are not detected using the optimal fingerprint methods. This indicates that the observed near-surface permafrost degradation can be largely attributed to GHG-induced warming, which has decreased the near-surface permafrost area in the Northern Hemisphere by approximately 0. 21 × 106 km2 decade−1 on average over the study period, according to the attribution analysis.
An operator derivation of the Feynman–Vernon theory, with applications to the generating function of bath energy changes and to an-harmonic baths
Authors: Aurell Erik , Kawai Ryochi , Goyal Ketan
Published: May 2020

We present a derivation of the Feynman–Vernon approach to open quantum systems in the language of super-operators. We show that this gives a new and more direct derivation of the generating function of energy changes in a bath, or baths. As found previously, this generating function is given by a Feynman–Vernon-like influence functional, with only time shifts in the kernels coupling the forward and backward paths. We further show that the new approach extends to an-harmonic and possible non-equilibrium baths, provided that the interactions are bi-linear, and that the baths do not interact between themselves. Such baths are characterized by non-trivial cumulants. Every non-zero cumulant of certain environment correlation functions is thus a kernel in a higher-order term in the Feynman–Vernon action.
Photomicrograph-Based Neuropathology Consultation in Tanzania
Authors: Zerd Francis , Moore Brian E , Malango Atuganile E , Hosokawa Patrick W , Lillehei Kevin O , Mchome Laurence Lemery , Ormond D Ryan
Published: May 2020

Objectives

Since neuropathologic diagnosis in the developing world is hampered by limitations in technical infrastructure, trained laboratory personnel, and subspecialty-trained pathologists, the use of telepathology for diagnostic support, second-opinion consultations, and ongoing training holds promise as a means of addressing these challenges. This study aims to assess the utility of static teleneuropathology in improving neuropathologic diagnoses in low- and middle-income countries.

Methods

Consecutive neurosurgical biopsy and resection specimens obtained at Muhimbili National Hospital in Tanzania between July 1, 2018, and June 30, 2019, were selected for retrospective, blinded static-image neuropathologic review followed by on-site review by an expert neuropathologist.

Results

A total of 75 neuropathologic cases were reviewed. The agreement of static images and on-site glass diagnosis was 71% with strict criteria and 88% with less stringent criteria. This represents an overall improvement in diagnostic accuracy from 36% by general pathologists to 71% by a neuropathologist using static telepathology (or from 76% to 88% with less stringent criteria).

Conclusions

Telepathology offers a promising means of providing diagnostic support, second-opinion consultations, and ongoing training to pathologists practicing in resource-limited countries. Moreover, static digital teleneuropathology is an uncomplicated, cost-effective, and reliable way to achieve these goals.
Minimalism’s Attention Deficit: Distraction, Description, and Mary Robison’s Why Did I Ever
Authors: Jones Sophie A
Published: May 2020

What does it mean to diagnose a literary work with attention deficit disorder (ADD)? This article traces how US literary minimalism came, in the late twentieth century, to be understood as a literary counterpart to the new diagnostic category of ADD. Pursuing some links between literary criticism and the third volume of the Diagnostic and Statistical Manual of Mental Disorders, the article shows how minimalism was seen to resemble the ADD patient because both were defined in terms of a descriptive surface that yielded no depths for expert excavation. Engaging with recent debates on the relative function and value of description and interpretation in literary studies, the article asks whether the notion of an ADD literary aesthetics, grounded in critical disability studies, might provide a route out of the dichotomy of suspicious analysis and reparative description. To pursue this question, the article performs a close reading of Mary Robison’s Why Did I Ever (2001), a novel narrated by Money Breton, a woman with an ADD diagnosis. Drawing on the critical disability studies concept of cripistemology, the article shows how Robison’s novel both dismantles the trope of minimalism’s attention deficit and demands a reformulation of the relationship between writing and diagnosis.
Retrieval Practice in Memory- and Language-Impaired Populations: A Systematic Review
Authors: de Lima Marcos Felipe Rodrigues , Cavendish Beatriz Araújo , de Deus Juliana Silva , Buratto Luciano Grüdtner
Published: May 2020

Objective

Neurological conditions, such as multiple sclerosis and stroke, may impair memory and language. A technique called retrieval practice (RP) may improve memory and language outcomes in such clinical populations. The RP effect refers to the finding that retrieving information from memory leads to better long-term retention than restudying the same information. Although the benefits of RP have been repeatedly observed in healthy populations, less is known about its potential applications in cognitive rehabilitation in clinical populations. Here we review the RP literature in populations with acquired memory and language impairments.

Method

Systematic searches for studies published before January 2020 were conducted on Elsevier, PsycARTICLES, PsycINFO, Pubmed, Web of Science, and Wiley Online Library, with the terms “retrieval practice”/“testing effect” and “cognitive rehabilitation”. In addition, backward and forward snowballing were used to allow the identification of important publications missed by the initial search. Studies were included if they were peer-reviewed, empirical work in which memory or language outcome measures were compared between an RP condition and a re-exposure-control condition in patients with acquired memory or language impairments.

Results

Sixteen articles fulfilled the inclusion criteria. Studies from memory-impaired samples were relatively homogeneous with respect to experimental protocols and materials and favored RP over control conditions. The results were mostly positive despite short retention intervals and predominantly single-session designs. Similarly, studies from language-impaired samples focused on naming impairments in patients with aphasia and also favored RP over name repetition.

Conclusion

The results indicate that RP is a viable technique for cognitive rehabilitation.
scVAE: variational auto-encoders for single-cell gene expression data
Authors: Grønbech Christopher Heje , Vording Maximillian Fornitz , Timshel Pascal N , Sønderby Casper Kaae , Pers Tune H , Winther Ole
Published: May 2020

Motivation

Models for analysing and making relevant biological inferences from massive amounts of complex single-cell transcriptomic data typically require several individual data-processing steps, each with their own set of hyperparameter choices. With deep generative models one can work directly with count data, make likelihood-based model comparison, learn a latent representation of the cells and capture more of the variability in different cell populations.

Results

We propose a novel method based on variational auto-encoders (VAEs) for analysis of single-cell RNA sequencing (scRNA-seq) data. It avoids data preprocessing by using raw count data as input and can robustly estimate the expected gene expression levels and a latent representation for each cell. We tested several count likelihood functions and a variant of the VAE that has a priori clustering in the latent space. We show for several scRNA-seq datasets that our method outperforms recently proposed scRNA-seq methods in clustering cells and that the resulting clusters reflect cell types.

Availability and implementation

Our method, called scVAE, is implemented in Python using the TensorFlow machine-learning library, and it is freely available at https://github.com/scvae/scvae.

Supplementary information

Supplementary data are available at Bioinformatics online.
Palantir: a springboard for the analysis of secondary metabolite gene clusters in large-scale genome mining projects
Authors: Meunier Loïc , Tocquin Pierre , Cornet Luc , Sirjacobs Damien , Leclère Valérie , Pupin Maude , Jacques Philippe , Baurain Denis
Published: May 2020

To support small and large-scale genome mining projects, we present Post-processing Analysis tooLbox for ANTIsmash Reports (Palantir), a dedicated software suite for handling and refining secondary metabolite biosynthetic gene cluster (BGC) data annotated with the popular antiSMASH pipeline. Palantir provides new functionalities building on NRPS/PKS predictions from antiSMASH, such as improved BGC annotation, module delineation and easy access to sub-sequences at different levels (cluster, gene, module and domain). Moreover, it can parse user-provided antiSMASH reports and reformat them for direct use or storage in a relational database.

Availability and implementation

Palantir is released both as a Perl API available on CPAN (https://metacpan.org/release/Bio-Palantir) and as a web application (http://palantir.uliege.be). As a practical use case, the web interface also features a database built from the mining of 1616 cyanobacterial genomes, of which 1488 were predicted to encode at least one BGC.

Supplementary information

Supplementary data are available at Bioinformatics online.