bluuebunny/crossref_metadata_2025 huggingface dataset:
Deletion of lncRNA5512 has no effect on spermatogenesis and reproduction in mice
Authors: Zhu Yu , Lin Yu , He Yue , Wang Hanshu , Chen Shitao , Li Zhenhua , Song Ning , Sun Fei
Published: March 2020

Long non-coding (lnc) RNAs are a series of RNAs longer than 200 nucleotides that do not code for protein products. Whole-genome expression profiles of lncRNAs suggest that they play important roles in spermatogenesis because they are particularly abundant in testes. However, most of their characteristics and functions remain unclear. The aim of this study was to define the function of lncRNA5512, which is abundant in spermatocytes and round spermatids, in mouse fertility invivo. To investigate this we generated lncRNA5512-knockout mice by clustered regularly interspaced palindromic repeats (CRISPR)/CRISPR-associated protein (Cas) 9 technology. Knockout mice showed normal spermatogenesis and fertility, and had no detectable abnormalities. This indicates that lncRNA5512 does not affect mouse fertility despite its high expression in the testes. Its specific localisation in spermatocytes and round spermatids suggests that it could be a useful marker for the identification of spermatocytes and round spermatids in mouse testes.
Perceptions of sexually transmissible infection pre-exposure prophylaxis: a qualitative study of high-risk gay and bisexual men in Sydney, New South Wales
Authors: Horn Ryan , Callander Denton , Haire Bridget
Published: March 2020

Background
Novel sexually transmissible infection (STI) prevention strategies are needed to combat increasing bacterial STI incidences alongside decreasing condom use among gay and bisexual men (GBM) in Australia. Sexually transmissible infection pre-exposure prophylaxis (STI-PrEP) using regular doxycycline is one such strategy that is the subject of ongoing research. However, a lack of qualitative data regarding the conceptualisation, perceived risks, perceived benefits and preferred dosing strategies of STI-PrEP may impede future research and implementation efforts. Methods: Semistructured in-depth interviews were conducted with 13 high-risk GBM residing in Sydney, Australia. Interviews were audio recorded, transcribed verbatim and then analysed thematically. Results: STI-PrEP was largely conceptualised using pre-existing knowledge of HIV-PrEP. The perceived benefits, including a reduced incidence of STIs, destigmatisation and a ‘peace of mind’, often outweighed the perceived risks, including side effects, antibiotic resistance and stigmatisation of consumers. A daily dosing regimen was preferred unanimously by participants when compared with event-driven or episodic strategies. Conclusions: Participants of this study were cautiously optimistic regarding the concept of STI-PrEP. The findings suggest that, in addition to examining the effectiveness of STI-PrEP, future implementation studies should also focus on concerns regarding side effects and monitoring antibiotic resistance, as well as considering the acceptability and potential for stigmatisation of STI-PrEP consumers.
Live-cell lipid biochemistry reveals a role of diacylglycerol side-chain composition for cellular lipid dynamics and protein affinities
Authors: Schuhmacher Milena , Grasskamp Andreas T. , Barahtjan Pavel , Wagner Nicolai , Lombardot Benoit , Schuhmacher Jan S. , Sala Pia , Lohmann Annett , Henry Ian , Shevchenko Andrej , Coskun Ünal , Walter Alexander M. , Nadler André
Published: March 2020

Every cell produces thousands of distinct lipid species, but insight into how lipid chemical diversity contributes to biological signaling is lacking, particularly because of a scarcity of methods for quantitatively studying lipid function in living cells. Using the example of diacylglycerols, prominent second messengers, we here investigate whether lipid chemical diversity can provide a basis for cellular signal specification. We generated photo-caged lipid probes, which allow acute manipulation of distinct diacylglycerol species in the plasma membrane. Combining uncaging experiments with mathematical modeling, we were able to determine binding constants for diacylglycerol–protein interactions, and kinetic parameters for diacylglycerol transbilayer movement and turnover in quantitative live-cell experiments. Strikingly, we find that affinities and kinetics vary by orders of magnitude due to diacylglycerol side-chain composition. These differences are sufficient to explain differential recruitment of diacylglycerol binding proteins and, thus, differing downstream phosphorylation patterns. Our approach represents a generally applicable method for elucidating the biological function of single lipid species on subcellular scales in quantitative live-cell experiments.
Defining how multiple lipid species interact with inward rectifier potassium (Kir2) channels
Authors: Duncan Anna L. , Corey Robin A. , Sansom Mark S. P.
Published: March 2020

Protein–lipid interactions are a key element of the function of many integral membrane proteins. These potential interactions should be considered alongside the complexity and diversity of membrane lipid composition. Inward rectifier potassium channel (Kir) Kir2.2 has multiple interactions with plasma membrane lipids: Phosphatidylinositol (4, 5)-bisphosphate (PIP2) activates the channel; a secondary anionic lipid site has been identified, which augments the activation by PIP2; and cholesterol inhibits the channel. Molecular dynamics simulations are used to characterize in molecular detail the protein–lipid interactions of Kir2.2 in a model of the complex plasma membrane. Kir2.2 has been simulated with multiple, functionally important lipid species. From our simulations we show that PIP2interacts most tightly at the crystallographic interaction sites, outcompeting other lipid species at this site. Phosphatidylserine (PS) interacts at the previously identified secondary anionic lipid interaction site, in a PIP2concentration-dependent manner. There is interplay between these anionic lipids: PS interactions are diminished when PIP2is not present in the membrane, underlining the need to consider multiple lipid species when investigating protein–lipid interactions.
DNA metabarcoding reveals metacommunity dynamics in a threatened boreal wetland wilderness
Authors: Bush Alex , Monk Wendy A. , Compson Zacchaeus G. , Peters Daniel L. , Porter Teresita M. , Shokralla Shadi , Wright Michael T. G. , Hajibabaei Mehrdad , Baird Donald J.
Published: March 2020

The complexity and natural variability of ecosystems present a challenge for reliable detection of change due to anthropogenic influences. This issue is exacerbated by necessary trade-offs that reduce the quality and resolution of survey data for assessments at large scales. The Peace–Athabasca Delta (PAD) is a large inland wetland complex in northern Alberta, Canada. Despite its geographic isolation, the PAD is threatened by encroachment of oil sands mining in the Athabasca watershed and hydroelectric dams in the Peace watershed. Methods capable of reliably detecting changes in ecosystem health are needed to evaluate and manage risks. Between 2011 and 2016, aquatic macroinvertebrates were sampled across a gradient of wetland flood frequency, applying both microscope-based morphological identification and DNA metabarcoding. By using multispecies occupancy models, we demonstrate that DNA metabarcoding detected a much broader range of taxa and more taxa per sample compared to traditional morphological identification and was essential to identifying significant responses to flood and thermal regimes. We show that family-level occupancy masks high variation among genera and quantify the bias of barcoding primers on the probability of detection in a natural community. Interestingly, patterns of community assembly were nearly random, suggesting a strong role of stochasticity in the dynamics of the metacommunity. This variability seriously compromises effective monitoring at local scales but also reflects resilience to hydrological and thermal variability. Nevertheless, simulations showed the greater efficiency of metabarcoding, particularly at a finer taxonomic resolution, provided the statistical power needed to detect change at the landscape scale.
Shape-morphing carbon fiber composite using electrochemical actuation
Authors: Johannisson Wilhelm , Harnden Ross , Zenkert Dan , Lindbergh Göran
Published: March 2020

Structures that are capable of changing shape can increase efficiency in many applications, but are often heavy and maintenance intensive. To reduce the mass and mechanical complexity solid-state morphing materials are desirable but are typically nonstructural and problematic to control. Here we present an electrically controlled solid-state morphing composite material that is lightweight and has a stiffness higher than aluminum. It is capable of producing large deformations and holding them with no additional power, albeit at low rates. The material is manufactured from commercial carbon fibers and a structural battery electrolyte, and uses lithium-ion insertion to produce shape changes at low voltages. A proof-of-concept material in a cantilever setup is used to show morphing, and analytical modeling shows good correlation with experimental observations. The concept presented shows considerable promise and paves the way for stiff, solid-state morphing materials.
A Rab prenyl membrane-anchor allows effector recognition to be regulated by guanine nucleotide
Authors: Lee Miriam , Wickner William , Song Hongki
Published: March 2020

Significance

Although proteins are commonly bound to membranes by hydrophobic transmembrane polypeptide segments, Rab family GTPases are anchored by prenyl groups. Rabs undergo conformational switching, being more active with bound GTP and less active with bound GDP. Rab-binding proteins, termed effectors, bind with higher affinity to Rab:GTP than to Rab:GDP. We now report that the prenylated yeast vacuolar Rab Ypt7 undergoes GTP/GDP switching, which is recognized by its effector HOPS (homotypic fusion and vacuole protein sorting). In contrast, transmembrane-anchored Ypt7 undergoes GTP/GDP switching, but binds and activates HOPS with either bound guanine nucleotide. A function of the Rab prenyl anchor is revealed, allowing an effector to read guanine-nucleotide-regulated Rab conformation.
Temperaments, tempers, and temporality
Authors: Cappelle Bert , Mostrov Vassil , Tayalati Fayssal
Published: March 2020

This study focuses on French and English abstract nouns denoting properties that can be ascribed to humans, such asbeauty, carefulnessandanger. Previous research showed that some but not all of these nouns are licensed in both locative existentials (e.g.,There’s an intense anger in Isabella) and possessive existentials (e.g.,Isabella has an intense anger). What remains unclear is how these and other patterns correlate among themselves depending on how easily they host such nouns. We here use speaker ratings of these nouns in different constructional environments. A principal component analysis suggests that the main dimension underlying native speakers’ ratings of these abstract nouns in six different patterns is temporal limitability. This gradable distinction, strongly correlated with the locative existential, holds for both the French and English data and outweighs any French-English contrastive differences in how acceptable human property nouns are considered to be in the patterns studied.
Chemical characteristic of sweet passion fruit (Passiflora lingularis Juss) seeds from Indonesia based on maturity levels
Authors: Andasuryani A , Zainal P W , Ifmalinda I
Published: March 2020

Sweet passion fruit (Passiflora ligularis Juss) cv. Gumanti is superior varieties of sweet passion fruit that is widely cultivated in Solok Regency of West Sumatra Province, Indonesia. This fruit can consume directly as fresh fruit and can be processed into juice that gave a by-product such as the seeds. The purpose of this research is to analyse the chemical properties of sweet passion of cv. Gumanti seed based on maturity level so that the nutritional content is known. Chemical analyses were performed such as proximate analysis, total phenol and antioxidant activity. Proximate analysis showed that the seeds of passion fruit are rich in carbohydrates+fibre (61.04%, 58.40% and 60.39% and crude fat (21.03%, 20.36% and 20.83%, respectively for maturity level I, II, and III), didn’t give significant difference based on maturity level (P>0.05). Furthermore, the result showed strong antioxidant activity (IC50: 50-100 ppm), where there was a significant based on maturity level (P < 0.05). Total phenol analysis showed a linear relationship with antioxidant activity. Thus, the seeds of sweet passion fruit also have potential as a raw in the food industries, chemical, and pharmacy such as the seeds of acid passion fruit that have been reported by previous researchers.
Aerobic composting of rumen content waste and rice straw at different C/N ratios
Authors: Sugito S , Ratnawati R
Published: March 2020

The increasing need for organic fertilizers in Indonesia along with the fulfilment of agricultural needs. On the other hand, the raw material of organic fertilizer is abundant and not yet utilized, one of which is Slaughterhouse Solid Waste (SSW). The objective of this study were to produce the quality of organic fertilizer that meets regulation of the Minister of Agriculture Decree No. 70 Year 2011 about Organic Fertilizer, Biological Fertilizer, and Land Improvement. The composting process was done using 20 kg of Madura’s cow rumen content and rice straw was placed in each reactor during 50 days. Raw materials were consisted of three variations in composting, i.e., 1) 60% rumen content waste and 40% rice straw, 2) 50% rumen content waste and 50% rice straw, 3) 40% rumen content waste and 60% rice straw. Eight standing reactors of 120 L capacity were used in this research. Each reactor was equipped with a leachate outlet at the bottom, slits for aeration, and sampling. The measured parameters were C/N ratio, macro nutrient (phosphor and kalium), temperature, dan pH value. The results showed that the optimum composition of rumen content waste with addition of rice straw was 40%:60%. In this reactor, C/N ratio was decreased from 15.91 to 13.25, macro nutrients in P concentration increased from 4.27 to 6.12, K concentration gradually increased from 5.46 to 7.55, temperature range was 29.80 oC-33.70 oC, and pH values slightly fluctuated from 6.71 to 6.93.
Datia Langhans cells as tuberculous lymphadenitis diagnose parameter based on chemical reaction
Authors: Purbaningsih W , Respati T , Setiabudi D , Sastramihardja H , Parwati I
Published: March 2020

The incidence of tuberculosis in Indonesia increases every year, resulted in increased cases of tuberculous lymphadenitis. The histopathological picture is often similar to other types of lymphadenitis. This study was an in-depth exploration of the anatomical pathology of Langhans datia cells and necrosis in tuberculous lymphadenitis. This research used secondary data from medical record of the lymph node paraffin blocks in the Anatomical Pathology Department of Sadikin Hasan General Hospital Bandung from January to December 2017. There are 322 medical records of tuberculosis lymphadenitis patients, consisting of 179 types of tuberculous lymphadenitis, 144 types of non-lymphadenitis specific, and nine types of granulomatous lymphadenitis. In all kinds of lymphadenitis, necrosis shows a general picture, whereas datia Langhans are more dominant in the tuberculous and granulomatous lymphadenitis type. The description of necrosing in lymphadenitis is tuberculous type 176(98.3%), non-specific type 120(83.3%), and granulomatous type 7(77.8%), while datia Langhans cells are more common in 132(73.7%) tuberculosis lymphadenitis, and granulomatous lymphadenitis 7(77.8%), compared with non-specific lymphadenitis 42(29.2%). This study concludes that there is necrosis in almost every type of lymphadenitis, whereas datia Langhans cells are lower in the tuberculous and granulomatous lymphadenitis.
Mechanical properties of fly ash-based geopolymer concrete using variation in maximum size of coarse aggregate
Authors: Patrisia Y , Coenraad R , Inderawan N A , Elidad E
Published: March 2020

The aim of this research was to study the mechanical properties (compressive strength and splitting-tensile strength) of fly ash-based geopolymer concrete using variation in the maximum size of coarse aggregate. The mode of study was laboratory research. Fly ash obtained from Asam-Asam Steam Power Plant, South Kalimantan, Indonesia. The maximum size of coarse aggregate was 10 mm, 20 mm and 30 mm. The geopolymer concrete proportion divided into 3 different mixtures and each contained 400 kg/m3 of fly ash. The alkaline activator used as sodium silicate and 10M sodium hydroxide in the ratio 2:1. The ratio of alkaline activator to fly ash was 0.4. Cylindrical specimens (size 100 mm x 200 mm) counted 10 pieces for each mixture proportion and cured at ambient condition. The test result showed that average of compressive strengths and splitting-tensile strengths for specimens with 10 mm, 20 mm, and 30 mm maximum size of aggregate at the age of 21 days were 11.04 MPa and 6.12 MPa, 10.82 MPa and 5.22 MPa, 10.06 MPa and 4.84 MPa respectively. In conclusion, the greater the maximum size of coarse aggregate, the smaller the value of compressive strength and splitting-tensile strength.
Potential of new innovative confinement for square reinforced concrete columns
Authors: Machmoed S P , Tavio T , Raka I G P
Published: March 2020

The most popular shape of column section used in reinforced concrete buildings is square or rectangle. Besides longitudinal bars, it is normally reinforced with traditional rectilinear or square shape of transverse steel (stirrups) or confinement. It is well known that circular spiral of reinforcing bars used in circular columns serve better ductility or performance compared to rectilinear stirrups in rectangular columns. Up to present, the use of spiral is limited only to circular columns. This is because for rectangular or square columns, it is not easy to shape the spiral on site during construction. The study focuses on the potential application of new innovative rectilinear or square spiral when used for rectangular or square concrete columns. The result of the study is that the proposed new innovative confinement which introduces the use of rectilinear or square spiral without any discontinuity or seismic hooks like those in the stirrups, as well as the introduction of interlocking system has successfully improved the ductility and performance of the columns. With this new innovative confinement, the confined core area is increased, the congestion can be avoided (no seismic hooks), and effectiveness of confining influence is improved (overlapped confining area through interlocking system).
Landuse change prediction model based on Cellular Automata (CA) method in Bandung City
Authors: Fardani I
Published: March 2020

Landuse change in a city is a natural event that cannot be avoided. One approach that can be used to detect landuse change is to use remote sensing technology. One of the method to predict landuse change is using Cellular Automata method. When landuse data is calculated, there is a lot of significant change of settlement in Bandung city from 1990 to 2017, but when but when we see the prediction of the settlement area in 2031 is not too much change, this can be caused by fewer land areas that can be converted, or the model must be added the new parameter of the driving force.
Study of labor cost escalation in delay projects
Authors: Natawidjana R , Nurasiyah S
Published: March 2020

Timeliness of implementation is one of the variables in the implementation of construction projects. Evaluation and acceleration of delays projects will generally affect the use of project resources. Project delays can be overcome by making efforts, among others, with the Crashing Method which will affect various alternative costs resulting from Crashing. This study aims to understand that the delay in the construction project schedule will have an impact on the new schedule and the impact of costs that occur due to the acceleration carried out so that the project life is in accordance with the plan. Furthermore, it was analyzed for the need for additional workforce groups or only to maintain the addition of overtime. This research was conducted with descriptive analytic method, which is a research that will explain the conditions in the field in detail about project schedule delays by analyzing the magnitude of escalation of labor costs due to the acceleration of the duration of each activity so that the project schedule returns to the plan age.
The performance of structures with circular columns and square columns in the structure of Rancacili Silinder II building
Authors: Kudwadi B , Maudina D , Istiqomah I
Published: March 2020

In general, structural planning is only limited to count the safety and durability of the building in holding and accommodating the load on the structure, without calculating or determining the performance level of the structure. The structure performance itself is used to determine the performance level of a structure against an earthquake design based on the level of damage to the structure when it is affected by an earthquake with a certain return period. This research was conducted to determine the level of structural performance based on variations in column with a case study of the Rancacili Silinder II building. Structural performance analysis was carried out using three structural models, the structure with a circular column and a square column (Structure type I) according to existing conditions, the structure with a circular column (Structure type II), and the structure with a square column (Structure type III). The structure type I uses the same column dimensions from base floor to the roof, but structure type II and III the column dimensions change smaller from the base floor to the roof. Determination of performance levels based on ATC-40 with seismic load analysis of spectrum response. For force calculations in using ETABS V.16.2.0. The results of this study indicate that the structure type I has the smallest displacement value among the three models, with a displacement value of the X direction at 50, 198 mm. While the structure type II has the smallest displacement value of the Y direction at 46, 995 mm among the three models. The structure performance based on ATC-40 from the three structural models shows that they are at the same level of performance, Immediate occupancy (IO), where after an earthquake there is only a little damage and has the strength and stiffness approximately the same as the pre-earthquake conditions.
The effect of blank holder on the deep drawing process on plates using software based with a Finite Element Method (FEM)
Authors: Sugiyanto D , Asbanu H , Siahaan F S
Published: March 2020

To reduce product defects in the deep drawing plate process, the manufacturing industry needs to design a product design in the form of initial simulations so as to reduce losses due to design errors. The purpose of this study was to determine the effect of blank holder characteristics on the plates produced in the deep drawing process. The effect of blank holder includes three factors, including: deep drawing without using the holder, clearance, and draw ratio. The simulation in this study uses the Finite Element Method (FEM) method with the help of a computer. The provisions of the part in this simulation with an approximate size setting of 0.25, the material used is steel with a thickness of 0.5 mm and a blank diameter of 51 mm. Cylinder cup diameter 40 mm and depth of formation process 60 mm radius 8 mm and punch force 550 N. Based on the simulation results from the deep drawing process without using blank holders, the force needed for the drawing process will be even greater. While the clearance variable will reduce the force required during the drawing process. And the draw ratio variable gets smaller and will require greater force.
A computerized study of factors of economic growth disparity in Indonesia
Authors: Sirait N , Hendra H , Nesti L
Published: March 2020

Disparity of economic development between regions is one of the problems and major challenges of economic development in Indonesia in the current situation and in the future. The success of development in the fiscal decentralization system cannot be measured only by the economic aspect with growth indicators or GRDP values of one region, however, it must be extended to indicators of economic progress, especially those concerning general basic services. Government put some efforts to reduce fiscal disparity, one of them is by providing the equalization funds, which are; SAF (Special Allocation Funds), GAF (General Allocation Funds) and RSF (Revenue Sharing Funds). However, in fact, the provision of equalization funds still causes fiscal imbalances. The purpose of this study is to describe variables that affect the condition of economic disparity in Indonesia, then examine the factors that cause economic growth disparity in Indonesia and the policies that should be carried out by the government to solve the problems. This study found that some researchers use different variables/indicators in determining economic growth in Indonesia.
Digital evaluation of student perception and self-use in a medical faculty
Authors: Nurhayati E , Argadiredja D S
Published: March 2020

The aim of this descriptive study was to describe the use and the perception of the third year undergraduate medical students in Bandung Islamic University toward integrative medicine. Data was collected quantitatively with cross sectional approach with the sample size consisted of 111 people. Results of this research on the use of integrative medicine showed that two-thirds (66.6%) of the students used integrative medicines, but this number was considered low compared to other studies. The most common used types of integrative therapy are massage (54.5%), consumptions of vitamins and minerals (46.6%), herbal medicine (35.2%) and aromatherapy (22, 7%). The study also shown that the students held moderate perceptions on every statement given. The study concluded that most of the students used integrative medicines. The most common integrative medicine modalities by the students were massage, consumptions of vitamins and minerals, herbal therapy and aromatherapy. The perceptions towards integrative medicine mostly dominate by moderate perception.
Measuring a community productivity based on motivation, skills, and marketing knowledge through a computerized application
Authors: Sunengsih N D , Winata A , Widiastuti W
Published: March 2020

The study aims to determine the effect of motivational, skill and marketing knowledge on productive. The study uses a survey method with causal analysis (path analysis). The sample consisted of 100 housewives by using simple random sampling technique. The relationship model between variables formulated in the theoretical model using Analysis of Variance (ANOVA). The results showed that variations of the productivity of the people were directly affected positively by variations of motivation, skills, and marketing knowledge. Variations of marketing knowledge are directly affected positively by variations of motivation and skills. Therefore, to increase community productivity can be done by increasing marketing knowledge, motivation, and skills. This can be done by enhancement program through community-based instructional design.
Stages of development electronic chemistry book on acid and base use 4S TMD models with STES approach
Authors: Agustina N R , Anwar S , Priscylio G , Oktasari C , Wahyuni W S , Lestari O
Published: March 2020

The purpose of this study was to development electronic chemistry book on acid and base use 4S TMD models with STES approach. 4S TMD models consist of selection, structuring, characterization, and didactic reduction. This study method is the first part of the development of teaching materials which includes selection and structuring steps. The study method is Development Research (DR) that consists of design, development, and evaluation. The design stage was to analyze and plan the types of teaching materials instructional developed. There are 13 indicators from 2 standard competencies that produced in selection step based curriculum, the compatibility subject matter and indicators, and the relations between value and subject matter. Explains the concept of acid-base using standardized textbook sources, and analyzes STES that can be integrated with the concept of acid base. In the structuring step, concept maps, macrostructures, and multiple representations are developed that connect between representations of macroscopic, submicroscopic and symbolic levels. The result of the selection and structuring steps are evaluated by expert lecturers. The first part of the development of teaching materials which includes the selection and structuring steps resulted in a draft of electronic chemistry book on acid-base with STES approach. This study reaches the structuring stage, then characterization and didactic reduction stage will be followed up.
Polymer learning design using Read, Answer, Discuss, Explain and Create (RADEC) model based on Google Classroom to develop student’s mastery of concepts
Authors: Siregar L S , Wahyu W , Sopandi W
Published: March 2020

Polymer is topic of chemistry which full of the concept and the application polymer is often found in everyday life. But based on the results of a survey with Chemistry teachers from different provinces, student’s mastery of concepts polymer is low level of concept mastery. Most of the teachers ignored the development student’s mastery of concepts polymer. This study aims to obtain a polymer learning design using the RADEC model based on google classroom to develop student’s mastery of concepts. The researcher used the Greivemeijer & Cobb Design-Based Research (DBR) research method consisting of 3 stages: Preliminary Design, Design Experiment and Retrospective Analysis. Participants in this study were senior high school students, Chemistry teachers and 3 observers who understood the RADEC model. Data collected by interviewing, testing (pre-teaching questions) and observing the activities of teachers and students. The results of the study indicate that the learning design developed by the researcher is valid, accessible and teachable. This is indicated by the results of expert validation and RADEC based on google classroom can develop student’s mastery of concepts.
Redesigning a sustainable bioenergy system using a multi-platform application
Authors: Nur S M , Ariati R , Yandri E , Adiatmojo G D , Abdullah K
Published: March 2020

This article is a concept that arranges and expands the bioenergy system paradigm that has been widely published by renewable energy experts. The new paradigm is based on the principle of the energy system where all factors must be identified and included because they affect the sustainability of the system’s process, performance and results. The target of this concept is structuring a more holistic and effective analytical technique to guide policymakers, entrepreneurs, and researchers in making decisions and implementing bioenergy projects. The literature review is used as an analytical tool to build this concept and the results of a study indicate that the bioenergy system is all key components that can be grouped into policy and regulation subsystems; the subsystem of the production and bioenergy utilization chain, the bioenergy management subsystem; and the bioenergy infrastructure subsystem. To get sustainability, bioenergy system is necessary to link and identify key materials that are related and interact with the economic, social and environmental pillars that support the sustainable development system. Future prospects are translating the concept of bioenergy system and their constituent components into mathematical models, making a research guide in the future based on agro-industry and regional agro-bioenergy system in Indonesia.
Hyperspectral image remote sensing classification using RotBoost
Authors: D Indradewi I G A A , R Ginantra N L W S , Ariantini M S
Published: March 2020

Hyperspectral images are able to provide more information because this kind of images have hundreds of spectral bands. In machine learning, the classification of hyperspectral data has several challenges, including high number of dimensions, number of output classes, and limited data references. The solution given to overcome the challenge is to use Ensemble Learning. The benefit of using Ensemble Learning is that we can improve the classification performance of hyperspectral data. One of the Ensemble Learning methods is RotBoost, which is a combination of the Rotation Forest and Adaboost methods. To find out the performance of the RotBoost method, this research used hyperspectral data of vegetation area in Indian pines, Indiana, USA that is provided by NASA’s airborne visible infra-red imaging spectrometer (AVIRIS). The RotBoost method then compared with Rotation Forest method to find a better performance. Confusion matrix used to evaluate the accuracy of each method in the classification. The performance measured is overall accuracy obtained by doing 5-fold cross validation. This experiment also conducted to find the most optimal S (number of base classifiers) and T (number of iteration in Adaboost) values. Experimental results showed that RotBoost produces better accuracy than the Rotation Forest. S and T parameter values are also not very influential on RotBoost accuracy.
Automatic high speed photography based microcontroller
Authors: Desnanjaya I G M N , Iswara I B A I , Ekayana A A G , Santika P P , Hartawan I N B
Published: March 2020

High-Speed Photography is a technique to capture a moment that moves very quickly. This technique is commonly used by photographers and scientists for research purposes, especially in the fields of physics, chemistry, and metallurgy. To capture the moment that moves quickly the photographer must squeeze the camera manually, then the camera will tend to shake, and the picture is not taken correctly. Also, there is also a delay between squeezing the camera with the shutter movement that adds error factor. In this study designed a high-speed automatic photography tool using a sound sensor that can freeze objects automatically when the sound is heard. To design and make this High-Speed Photography tool automatically use Microcontroller and FC-04 Voice Sound. The results of the overall test conducted to test all the components contained in the tool High-speed automatic photography. The first test scenario is to put the tool ± 50 cm will work optimally, the second test scenario is the sound sensor response when the balloon object to distinguish the object to photograph. This tool is capable of taking pictures automatically when the sound is heard.
Body mass index measurement system as a desktop-based nutrition monitor
Authors: Ekayana A A G , Hartawan I N B , Desnanjaya I G M N , B Joni I D M A
Published: March 2020

Today, having a healthy body is everyone’s dream, from the age of the children, teenagers to adulthood. Personal health must be maintained to run all the activities that are being done. One of the factors that affect the health condition is the nutritional status of a person, which sometimes decreases or increases too high. Body mass index is the most commonly used indicator to know the nutritional status of a person. This system uses two sensors, the load cell sensor as a weight gauge and ultrasonic sensors as a measure of height. Processing data using Arduino Uno and the results of data processing from microcontroller issued to the LCD and stored on the PC database as data Body Mass Index which further processed and displayed the person’s nutritional status directly. After the test, the system successfully measured the weight and height that will be processed into the value of Body Mass Index. The test of this system is performed by randomly selected respondents, both children and adults. Value of the measurement system is also compared with the value using standard tools for measuring weight and height, and the results have near 100% accuracy.
Gender aspects, overnutrition, and air pollution in relation to asthma severity in adolescents
Authors: Garina L A , Mansoer F A F , Grahadinta M R , Puspitasari I
Published: March 2020

The prevalence of obesity in asthmatic patient has increased, and associated with worse asthma severity and quality of life. This study investigates the effect of gender and overnutrition on asthma severity. Observational study on 41 overnutrition (overweight and obese), and 41 normweight asthmatic adolescents in two primary high schools. Diagnosis and asthma severity based on GINA, ISAAC and Indonesian Paediatrician Association (IDAI). The BMI was converted to z score from WHO, and lung function was measured by spirometer. The statistical analysis was performed with the software SPSS v.20. The mean BMI in female was higher than male. The mean FEV1; FVC; FEV1/FVC in female was lower than male. The mean FEV1; FVC; FEV1/FVC in overnutrition was lower than normweight. Based on asthma severity: 39% intermittent, 39% mild persistent, 17% moderate persistent, and 5% severe persistent. As many as 77% of 47 females had persistent, of 41 overnutrition asthmatic adolescents 85% had persistent asthma. There are an impact of gender and overnutrition on asthma severity (OR:4.4; 95%CI:1.7-11.3; p=0.002 and OR:9.1; 95%CI:3.1-26.5; p<0.001). Among asthmatic adolescents the risk for persistent asthma was greater in females with overnutrition compare to males.
The model for determining location of export coffee’s warehouse distribution in West Java
Authors: Ceha R , Dzikron M , Muhamad C R , Farash M , Riyanto S
Published: March 2020

The objective of this article is to design a solution to coffee supply chain improvement by warehouse distribution center determination of exported coffee in West Java. Determining the distribution warehouse center requires three stages: determining clusters, determining warehouse’s location of each cluster, and determining warehouse’ center; sequentially, each of them has 6, 14, and 5 steps. Several methods used in conducting those stages are Clustering Method (or well-known as Agglomerative Clustering for determining clusters), Model Optimization (P-Median Method) for determining warehouse location in each cluster, and Location Theory for determining the export warehouse center. The first stage results in classifying West Java into 4 clusters. Cluster I consists of 3 Districts and 1 City. Cluster II consists of 4 Districts. Cluster III consists of 4 Districts. Cluster IV consists of 3 Districts and 3 Cities. Furthermore, in determining warehouse’s location of each cluster, central of warehouse distribution at cluster I is located in Bogor District, Cluster II is located in West Bandung District, Cluster III is located in Kuningan District, and Cluster IV is located in Tasikmalaya District. At the final stage of determining warehouse center, Cirebon is selected to be the center of coffee export warehouse in West Java. This study could abridge inefficient coffee supply chain in order to increase the selling price of coffee among farmers, which could increase their profit and prosperity.
Study of ambulance ship design for island services in Indonesia
Authors: Pusaka A , Dewanto Y A , Octaviany F
Published: March 2020

Ambulance ships are one of the ships used to help transport the people who experience pain and are in the islands and are connected to the nearest regional General Hospital. The ship will be used in two concepts, namely the first to transport sick people or due to disasters and when ordinary days are used to transport passengers. This need is a consideration to reach areas that are quite difficult to reach. In this plan, the principal dimension is determined according to the area covered. Ships selected using Fibreglass material. The planning method uses a spiral design with ship planning procedures. The dimensions obtained are based on the results of calculations according to the function and usability of the ship. And the speed of the ship produced as well as the load space for passengers and sick people. This ambulance ship will be used according to the limits of the planning results.
Students’ imitative and creative reasoning ability in solving geometry problems
Authors: Permatasari N , Darhim D , Jupri A
Published: March 2020

This research aims to analyse students’ imitative and creative reasoning in solving geometry problems. The reasoning is essential for students. The reasoning in the context of learning mathematics is needed to understand mathematical concepts, build a mathematical idea and provide evidence of the truth of the idea. The reasoning divided into imitative and creative. Indicators of creative reasoning consist of creativity, anchoring, and plausibility. The method of this research was qualitative descriptive research. The subjects in this research were thirty-four students in ninth grade around fourteen to fifteen years old who have studied about cube and cuboid. Data collection was done by tests and interviews. The results of the data analysis show how students solve geometry problems using imitative and creative reasoning. The student answers are categorized into three groups, student answers by imitative and creative reasoning, student answers by imitative without creative reasoning, and the last student answers by creative without imitative reasoning.
The effect of Process Oriented Guided Inquiry Learning (POGIL) on mathematical problem solving abilities
Authors: Muhammad M , Purwanto J
Published: March 2020

This research aimed to identify the effect of POGIL model on the students’ mathematical problem-solving ability. The variables involved in this research were mathematical problem-solving abilities as an independent variable, and the POGIL model as a dependent variable. Based on the observations of researchers through interviews with mathematics subject teachers and students at Junior High School 2 Kalibagor, showed that the mathematical learning process that took place was still dominated by learning that did not involve the active role of students. The learning used is still teacher-centered and limited to information transfer, especially in the form of theoretical and mathematical equations. The population of this study was the students at seventh grade in Junior High School 2 Kalibagor, even semester in the school year 2017/2018 consist of 8 classes and amounted to 219 students. Sampling was done randomly, selected as an experimental class is 66.91 with 30 students and 55.91 as control class with 30 students. This test was validated by two mathematicians, then it was tested to a group of seventh-grade students to fulfill the validity and reliability criteria. The data were analyzed by using t-test after conducting a series of normality and homogeneity tests. It was concluded that t-test for equality of means was used for hypothesis testing that shows a significant value = 0.000 less than alpha 0.05. So that H0 is rejected, it means that students’ mathematical problem-solving ability taught by using POGIL model is better than students’ mathematical problem-solving ability taught by conventional learning. In other words, POGIL model influences or effects on students’ mathematical problem-solving abilities.
Turbulent modelling analysis of saturated steam flow in curved convergent divergent nozzle
Authors: Pujowidodo H , Siswantara A I , Daryus A , Gunadi G G R
Published: March 2020

The objective of this study is to analyze turbulent flow characteristics of turbulence modeling in Steam Curved Converging Diverging Nozzle. The three turbulence models have been conducted to simulate flow characteristics using k-ε standard, k-ε Renormalization Group (RNG), and Reynolds Stress Model (RSM). Fluid dynamics parameters such as pressure, velocity, and/or density have been analyzed graphically to know the more suitable model. The k- k-ε STD and RNG show give the similar profile of the turbulent kinetic energy (k) and energy dissipation rate (ε) that is differ with the RSM model. After throat position (position 0.67 m) the k-k-ε STD and RNG give the magnitude more than 1200 (m2/s2) for its turbulent kinetic energy and more than 3.2E06 (m2/s3) for its energy dissipation rate. The RSM model give the lowest values which far below 200 (m2/s2) for turbulent kinetic energy and below 2E05 (m2/s3) for energy dissipation rate. The turbulence modeling analysis of steam saturated flow in plane-curved nozzle present the increasing steam velocity about 3 Ma for 200 kPa steam inlet.
The analyse of the automotive alternator as a generator in Picohydro system: Laboratory experiment test
Authors: Adibowo S , Uyun A S , Nur S M , Abdullah K , Yandri E , Adiatmojo G D
Published: March 2020

The aim of this article is to evaluate the feasibility of using an automotive alternator as a Pico water turbine (Picohydro). The automotive alternator system is examined by the pump as a turbine, using water energy in the simulator system to generates the automotive alternator. The simulator equipment that has been made is used to see the performance of the automotive alternator as a generator and recorded a few parameters in the closed-loop system. From this evaluation, the greater the water flow or water pressure that drives the pump as a turbine, the higher the power is produced from the automotive alternator. The Study shows that automotive alternator can be used as a generator and an alternative to generating electricity.
Chronic pesticides exposure on the farmers in Tanjung Wangi Village: Focus on Alpha-Synuclein as a Biomarker of Parkinson-sporadic
Authors: Yulianti A B , Tresnasari C , Widayanti W
Published: March 2020

The study aim was to analyze the effect of chronic pesticide exposure on farmers in Tanjung Wangi village. Observational study with male adult farmer as respondents. 100 questionnaires were given to farmers and 56 returned. The average age of respondents was 46.5 years, education was primary school, length of work/day was 4-6 hours, length as farmer was more than 10 years. The results were no respondents have Parkinson symptoms with a median score were 57, 61, and 67.5 on 1 to 5, 5 to10, and more than 10 years pesticide exposure respectively. From 56 respondents selected 30 persons randomly for physical examination (PE) and blood examination Parameters measured were PE, concentration of glutathione-total and alpha-synuclein in erythrocyte membranes. Data analysis was performed with IBM SPSS 21. The results were no respondents have digestive and balance disorders. Alpha-synuclein concentrations were not significantly different between the length of exposure as well as total glutathione concentrations. PE significant correlation with alpha-synuclein (rho=0.366, p=0.044). Pesticides cause oxidative stress in erythrocytes. Alpha-synuclein has the potential as a biomarker for Parkinson-sporadic disease.
Estimation of the magnitude of the Ruderman-Kittel interaction in 3d and 2d GaAs crystals
Authors: Gribakin B F , Cherbunin R V , Kavokin K V
Published: March 2020

In this paper, estimates are made of the Ruderman-Kittel interaction in a gallium arsenide crystal and in GaAs quantum wells of varying widths. The calculation results indicate that this interaction may be weaker than the magnetic dipole-dipole interaction by an order of magnitude. Also discovered was a relatively strong dependence of this interaction on the level of doping.
Optical studies of wide-bandgap HgCdTe material used in potential-and quantum-well structures
Authors: Andryushchenko D A , Bazhenov N L , Mynbaev K D , Mikhailov N N , Remesnik V G
Published: March 2020

Optical transmission and photoluminescence were used for the study of wide-bandgap (0.8-1.1 eV) HgCdTe (MCT) material grown by molecular-beam epitaxy. The material, including layers used as spacers and barriers in potential-and quantum-well structures, showed a considerable degree of alloy disorder similar to narrow-gap MCT grown by the same method. In some samples, defect states in the bandgap were found. Optimization of the growth technology for wide-bandgap material should help improving the quality of MCT-based potential-and quantum-well structures designed for various applications.