bluuebunny/crossref_metadata_2025 huggingface dataset:
Recent responses to climate change reveal the drivers of species extinction and survival
Authors: Román-Palacios Cristian , Wiens John J.
Published: February 2020

Climate change may be a major threat to biodiversity in the next 100 years. Although there has been important work on mechanisms of decline in some species, it generally remains unclear which changes in climate actually cause extinctions, and how many species will likely be lost. Here, we identify the specific changes in climate that are associated with the widespread local extinctions that have already occurred. We then use this information to predict the extent of future biodiversity loss and to identify which processes may forestall extinction. We used data from surveys of 538 plant and animal species over time, 44% of which have already had local extinctions at one or more sites. We found that locations with local extinctions had larger and faster changes in hottest yearly temperatures than those without. Surprisingly, sites with local extinctions had significantly smaller changes in mean annual temperatures, despite the widespread use of mean annual temperatures as proxies for overall climate change. Based on their past rates of dispersal, we estimate that 57–70% of these 538 species will not disperse quickly enough to avoid extinction. However, we show that niche shifts appear to be far more important for avoiding extinction than dispersal, although most studies focus only on dispersal. Specifically, considering both dispersal and niche shifts, we project that only 16–30% of these 538 species may go extinct by 2070. Overall, our results help identify the specific climatic changes that cause extinction and the processes that may help species to survive.
Mechanism for neurotransmitter-receptor matching
Authors: Hammond-Weinberger Dena R. , Wang Yunxin , Glavis-Bloom Alex , Spitzer Nicholas C.
Published: February 2020

Significance

Neurotransmitter switching generally involves replacement of an excitatory transmitter with an inhibitory transmitter or vice versa and has been linked to changes in animal behavior. There are corresponding switches in postsynaptic receptors that enable continued function of the circuit, but the mechanism by which receptor expression is regulated in this context was unknown. Sustained exposure to the neurotransmitter glutamate during development is both necessary and sufficient for the upregulation of ionotropic glutamate receptors in vertebrate striated skeletal muscle cells. This finding suggests a basis by which neurotransmitter release up-regulates expression of matching receptors at newly formed synapses during development of the nervous system and in response to neurotransmitter switching at established synapses.
Molecular underpinnings of cytoskeletal cross-talk
Authors: Oberhofer Angela , Reithmann Emanuel , Spieler Peter , Stepp Willi L. , Zimmermann Dennis , Schmid Bettina , Frey Erwin , Ökten Zeynep
Published: February 2020

Significance

Long considered independent, the microtubule and actin network systems are now known to engage in functional cross-talk to drive essential cellular processes such as whole-cell migration, mitotic spindle positioning, or cell-wide organelle transport. However, molecular details of cytoskeletal cross-talk remain largely elusive. Here, we combine bottom-up reconstitution and theoretical approaches to systematically dissect the underlying mechanistic principles of cytoskeletal cross-talk using the example of cell-wide organelle transport. We show that a small regulatory protein domain is sufficient to establish cross-talk on the microscopic scale and prompt a global reorganization of organelles on the microtubule–actin cytoskeleton on the cellular scale. Indeed, this analytical approach can reproduce the previously observed redistribution of organelles in vivo with remarkable accuracy.
High-resolution neutron crystallography visualizes an OH-bound resting state of a copper-containing nitrite reductase
Authors: Fukuda Yohta , Hirano Yu , Kusaka Katsuhiro , Inoue Tsuyoshi , Tamada Taro
Published: February 2020

Copper-containing nitrite reductases (CuNIRs) transform nitrite to gaseous nitric oxide, which is a key process in the global nitrogen cycle. The catalytic mechanism has been extensively studied to ultimately achieve rational control of this important geobiochemical reaction. However, accumulated structural biology data show discrepancies with spectroscopic and computational studies; hence, the reaction mechanism is still controversial. In particular, the details of the proton transfer involved in it are largely unknown. This situation arises from the failure of determining positions of hydrogen atoms and protons, which play essential roles at the catalytic site of CuNIRs, even with atomic resolution X-ray crystallography. Here, we determined the 1.50 Å resolution neutron structure of a CuNIR from
Geobacillus thermodenitrificans
(trimer molecular mass of ∼106 kDa) in its resting state at low pH. Our neutron structure reveals the protonation states of catalytic residues (deprotonated aspartate and protonated histidine), thus providing insights into the catalytic mechanism. We found that a hydroxide ion can exist as a ligand to the catalytic Cu atom in the resting state even at a low pH. This OH-bound Cu site is unexpected from previously given X-ray structures but consistent with a reaction intermediate suggested by computational chemistry. Furthermore, the hydrogen-deuterium exchange ratio in our neutron structure suggests that the intramolecular electron transfer pathway has a hydrogen-bond jump, which is proposed by quantum chemistry. Our study can seamlessly link the structural biology to the computational chemistry of CuNIRs, boosting our understanding of the enzymes at the atomic and electronic levels.
Nucleolar localization of RAG1 modulates V(D)J recombination activity
Authors: Brecht Ryan M. , Liu Catherine C. , Beilinson Helen A. , Khitun Alexandra , Slavoff Sarah A. , Schatz David G.
Published: February 2020

V(D)J recombination assembles and diversifies Ig and T cell receptor genes in developing B and T lymphocytes. The reaction is initiated by the RAG1-RAG2 protein complex which binds and cleaves at discrete gene segments in the antigen receptor loci. To identify mechanisms that regulate V(D)J recombination, we used proximity-dependent biotin identification to analyze the interactomes of full-length and truncated forms of RAG1 in pre-B cells. This revealed an association of RAG1 with numerous nucleolar proteins in a manner dependent on amino acids 216 to 383 and allowed identification of a motif required for nucleolar localization. Experiments in transformed pre-B cell lines and cultured primary pre-B cells reveal a strong correlation between disruption of nucleoli, reduced association of RAG1 with a nucleolar marker, and increased V(D)J recombination activity. Mutation of the RAG1 nucleolar localization motif boosts recombination while removal of the first 215 amino acids of RAG1, required for efficient egress from nucleoli, reduces recombination activity. Our findings indicate that nucleolar sequestration of RAG1 is a negative regulatory mechanism in V(D)J recombination and identify regions of the RAG1 N-terminal region that control nucleolar association and egress.
Grammaticalized sources of Kurtöp verbal morphology
Authors: Hyslop Gwendolyn
Published: February 2020

Kurtöp (Tibeto-Burman; Bhutan) has a rich set of finite verbal suffixes which encode evidentiality, mirativity, and egophoricity. This article examines the origins of these suffixes in a typological context, showing how many of them have developed via recent grammaticalizations. Synchronic processes of nominalization and clause-chaining have provided the ideal syntactic contexts for these grammaticalizations to take place. Many of the grammaticalization pathways found here are shown to be typologically common, such as ‘give’ becoming an applicative. We find one suffix, the egophoric, which is an obvious borrowing. Based on the data presented here, this article puts forth the tentative hypothesis that due to principles of iconicity, miratives will tend to be recent grammaticalizations. Similarly, the fact that the Kurtöp egophoric has been borrowed is also, arguably, iconic.
An early endosome–derived retrograde trafficking pathway promotes secretory granule maturation
Authors: Ma Cheng-I J. , Yang Yitong , Kim Taeah , Chen Chang Hua , Polevoy Gordon , Vissa Miluska , Burgess Jason , Brill Julie A.
Published: February 2020

Regulated secretion is a fundamental cellular process in which biologically active molecules stored in long-lasting secretory granules (SGs) are secreted in response to external stimuli. Many studies have described mechanisms responsible for biogenesis and secretion of SGs, but how SGs mature remains poorly understood. In a genetic screen, we discovered a large number of endolysosomal trafficking genes required for proper SG maturation, indicating that maturation of SGs might occur in a manner similar to lysosome-related organelles (LROs). CD63, a tetraspanin known to decorate LROs, also decorates SG membranes and facilitates SG maturation. Moreover, CD63-mediated SG maturation requires type II phosphatidylinositol 4 kinase (PI4KII)-dependent early endosomal sorting and accumulation of phosphatidylinositol 4-phosphate (PI4P) on SG membranes. In addition, the PI4P effector Past1 is needed for formation of stable PI4KII-containing endosomal tubules associated with this process. Our results reveal that maturation of post-Golgi–derived SGs requires trafficking via the endosomal system, similar to mechanisms employed by LROs.
Unfolding innate mechanisms in the cancer microenvironment: The emerging role of the mesenchyme
Authors: Koliaraki Vasiliki , Henriques Ana , Prados Alejandro , Kollias George
Published: February 2020

Innate mechanisms in the tumor stroma play a crucial role both in the initial rejection of tumors and in cancer promotion. Here, we provide a concise overview of the innate system in cancer and recent advances in the field, including the activation and functions of innate immune cells and the emerging innate properties and modulatory roles of the fibroblastic mesenchyme. Novel insights into the diverse identities and functions of the innate immune and mesenchymal cells in the microenvironment of tumors should lead to improved anticancer therapies.
Modular constructed metal-grid arrays—an alternative to silicon-based microplasma devices for catalytic applications
Authors: Dzikowski Sebastian , Michaud Ronan , Böttner Henrik , Dussart Remi , Böke Marc , Schulz-von der Gathen Volker
Published: February 2020

Here, we present a modular constructed metal-grid micro cavity plasma array as a flexible, robust, and simple alternative to micro-structured devices based on silicon. They show great potential for applications requiring large-area treatment, catalytic conversion or decomposition of volatile organic compounds. The metal-grid array is an easily assembled layered structure consisting of a metal grid, a dielectric foil and a magnet. The grid contains between hundreds and thousands of uniformly arranged cavities with a diameter of 150 μm. The whole system is kept together by magnetic force. This also allows disassembling and exchange of the components independently. Typically, the arrays are operated close to atmospheric pressure with an alternating voltage of up to 1.4 kV peak-to-peak in the kHz range. For a first comparison with silicon-based configurations, the metal-grid array is examined from two different perspectives using phase-resolved imaging. The individual cavities show the same asymmetric discharge behaviour as in the silicon-based arrays. In addition, the expansion width of the discharge from the cavities could be measured. The same interaction between the cavities with the propagation of an ionization wave with velocities in the km/s range is observed as for the silicon-based devices. Thus, with respect to the most basic discharge properties, both configurations show the same behaviour, although they are different in structure and composition.
Simulation of acidity reduction of hot spring bath water in lahendong geothermal field, North Sulawesi using runge-kutta method
Authors: Kharisma N I , Mauren B C , Harto A W , Utami P
Published: February 2020

Numerous acidic hot springs characterize to Lahendong geothermal field. Many of them for example, those occuring in the Pine Forest recreation area are utilized for bathing. This hot springs have a temperature for about 40 degrees of Celcius and pH value of less than 2. Besides being corrosive the acidic fluids also irritate human skin. This paper presents the preliminary results of our research aiming to reduce the acidity of the hot spring bath water in lahendong by utilizing Calcium Carbonate (limestone). The increment of pH of the water is calculated by using Runge-Kutta 4th order method and approached by continuous-stirred tank reaction using cylindrical tank. The trial using simulated trial errors and assumed variables. Simulation could be applied and adjusted to field conditions.First trial produces pH 2.5, it isobtained if the frequency factor value by 0.2. Second trial producespH 5with frequency factor value by 1.1. Thus, the greater the value of frequency factor, the faster the reaction will workand produce a largerpH.
Converter matlab fuzzy inference to arduino Csystem
Authors: Khairudin M , Wijaya H A , Muslikhin
Published: February 2020

This study aims to utilize the FIS matlab converter (fuzzy inference system) into the C arduino programming language with the aim of simplifying the fuzzy logic model that can be applied immediately with control hardware such as Arduino. In this study, an example of fuzzy logic is used with two sensor inputs, namely temperature and smoke sensors as inputs and two outputs in the form of buzzers and pump motors. The method used is sugeno in matlab. Then the formation of input variables modeled mapping scale is formed 0 - 100 and scale output 0 - 2. Converter. Fis fuzzy inference system can be applied to the design of fuzzy logic systems with the results of the .ino format conversion program template that can be set output results as arduino triger directly . This setting is enough to do with the reading of the g_fisOutput [] variable with IF-ELSE.
Attadance system using infrared sensors
Authors: Khairudin M , Lanang G W , Arifin A
Published: February 2020

This study aims to design and develop a system for student counters in the room. This Attadance System is based on the Arduino Uno R3 microcontroller by using an IR sensor to detect the object. This system is expected to facilitate the work of teaching staff in conducting attendance activities in the classroom that will not cut the time of teaching and learning. The main purpose of this Attadance System is to help student counting in the room automatically. The automatic student counting attendance system that uses a microcontroller and IR sensor is designed and built through several stages, namely: (1) analysis and identification of attadance and component system requirements and other tools that support the success of system assembly; (2) designing components and mechanical design as containers and supports; (3) system implementation; (4) system testing and evaluation of the overall Attadance System. The testing of the automatic student counter attendance system shows the results in the form of performance consisting of the experiment number, IR sensor detection distance, and the state of the light and environmental conditions of the light intensity. The sensor is able to detect distances of up to 6.5 cm if in good light intensity conditions. But in conditions of poor light intensity the sensor can only detect up to 5.5 cm.
Usability testing electronic rubric of performance assessment
Authors: Jubaedah Y , Yulia C , Muktiarni M , Maosul A
Published: February 2020

Integrating technology in the assessment process facilitates the overall education process, for teachers, students, and educational institutions. Online Evaluation System is an e- learning application in the context of the “Learning Evaluation System” which is designed to facilitate the evaluation process. In creating a digital assessment tool, one needs to pay attention to the usability aspect as the key to success and as a user acceptance requirement for the application. In this research, researcher tested the usability performance assessment in the form of an electronic rubric to assess learning. Usability testing aims to determine whether an application is in accordance with the user needs or not. Usability testing uses an evaluation sheet in the form of a questionnaire, namely Use Questionnaire, a tool that can be used in the preparation of the questions that will be made in the form of a questionnaire. Testing was done by observing the user; how they used the application. The components tested consisted of components of usefulness, satisfaction, ease of use and ease of learning. The application tested was SmartRubric, an assessment application designed to facilitate the workload of teachers in carrying out the evaluation process. The test results show that respondents generally strongly agree with the usability aspect of SmartRubric application software. The research concludes that electronic rubric is a resource that facilitates assessment for students as participants in the assessment process. Students tend to be satisfied with the use of electronic rubrics in assessment.
Development of Accreditation Information System (AIS) for vocational higher education with NAAHE standard
Authors: Fariani R I , Damayanti A
Published: February 2020

Higher Education Accreditation is an activity that must be implemented by every college for every 5 years where this activity becomes a benchmark for college sustainability. This accreditation must be in line with the National Accreditation Agency for Higher Education (NAAHE) standards. Astra Manufacturing Polytechnic (Polman Astra) as one of the vocational higher education also conducts the accreditation. In compiling the accreditation instrument Polman Astra has a problem such as the inaccuracy of accreditation data between one department and another and the difficulty of coordinating among departments in providing data accreditation compilation. This problem may cause the late of accreditation according to a predetermined time. Due to this problem, an information system was built, namely Accreditation Information System (AIS). It is a web-based information system and designed according to NAAHE standard. AIS is built using the .NET framework and SQL Server DBMS with prototyping methodology. After implementation, AIS was able to integrate the needs of data accreditation by providing data requirements and eliminates delaying data preparation by the related department since it was directly generated from the Polman Astra database. AIS is also able to manage the accreditation data table dynamically and transparently, eliminates paper printing costs into zero and prevent delays in the preparation of accreditation instruments so that the accreditation can be completed according to a predetermined time
Good earthworm-kitchen waste decomposition device
Authors: Peng L , Zheng P , Siswanto I
Published: February 2020

Modern people’s lives pay more attention to the quality of life, but the waste of food and the improper recycling of food waste have caused energy and environmental problems. We use the advantages of decomposing food to solve the problem of raw kitchen waste and make organic fertilizer for planting. The household kitchen waste disintegration device that we tried to design we used the drum type proposal and put it indoors to solve the problem of raw kitchen waste. There is a cover to switching to reduce the odor and cause the mosquitoes to approach. After entering the raw kitchen, turn the drum, stir the soil and raw kitchen, easy to operate and simple, and improve the quality of life. After a period of time, the organic fertilizer is collected after the worm-eating the raw from the kitchen. The mesh can be replaced by a hole. When turning, the soil will fall into the larger box below, and the culture water will flow into the lowermost box, and the sputum will remain in the drum. In the next, continue the next breeding.
Effects of problem-based learning model and collaborative learning model on the learning outcomes of mechanics engineering
Authors: Silalahi J , Abdullah R
Published: February 2020

The ability of teachers to determine the right learning model will have an impact on the students’ learning outcomes and the achievement of learning objectives. The low students’ learning outcomes in Mechanics Engineering is influenced by the learning model used by the teacher in teaching. This paper aims to determine differences in the effect of problem-based learning model and collaborative learning model on the learning outcome in Mechanics Engineering. This method used in this research is a quasi-experimental method with a non- equivalent control group design. The study sample consisted of 62 people divided into two groups, namely the experimental group 1 and the experimental group 2. The sampling technique was carried out using random sampling, 31 people for the experimental group 1 and 31 people for the experimental group 2. Data collection using the learning result test (pre-test and post-test) in the form of objective questions for about 25 questions. Data obtained were analyzed using descriptive statistical analysis techniques and inferential statistical analysis techniques, namely the t-test. Based on data analysis, the results showed that there were significant differences in the effect of problem-based learning model and collaborative learning model on the learning outcomes in Mechanics Engineering. The experimental group 1 using problem-based learning model had higher learning outcomes than the experimental group 2 using collaborative learning model.
Continuous and integrated model of learning media and evaluation for vocational education application: A case in automotive biodiesel learning materials
Authors: Widjanarko D , Khumaedi M , Kusumaningtyas R D
Published: February 2020

Learning media and evaluation are very important parts of learning. Both of these must be present in learning. This article aims to study the combination of learning media and evaluation so that each learning material provided can be measured until the end of learning. The concept proposed is continuous and integrated model of learning media and evaluation for vocational education application. This concept is built based on studies of learning media and evaluation that had been done by previous researchers. Based on the previous studies, continuous and integrated conceptual models of learning media and evaluation are built. This would force and encourage students to be more active in comprehending the learning material presented in the media.
Development of MOOCs synchronized life-based learning to improve the quality of outcomes in prospective vocational teachers in the era of education 4.0
Authors: Tuwoso  , Putra A B N R , Mukhadis A , Mahamad A K B , Sembiring A I
Published: February 2020

The objectives of this study include 1) mapping aspects of the need to improve the quality of prospective vocational teacher’s outcomes; and 2) the attractiveness test of the developed Massive Open Online Courses (MOOCs) product. This research uses research and development (R&D) methods. The subjects of this study were all vocational students at Malang State University. Data collection techniques through questionnaires and interviews. The results of this study include: 1) aspects of the need to improve the outcome of prospective vocational teachers namely learning aspects (awareness has a percentage of 78%, knowledge has a percentage of 85%, attitudes has a percentage of 97%, and special skills have a percentage of 82%.), The aspect of action (behavior has a percentage of 86%, practice has a percentage of 90%, and decision making has a percentage of 88%), and aspects of conditions (economic conditions have a percentage of 82%, social conditions have a percentage of 84%, individual conditions have a percentage of 90%, and environmental conditions have a percentage of 94%); 2) MOOCs products developed are feasible and interesting (average score 92%); and 3) media/product innovation MOOCs that are developed can be used as a reference for the development of technologies that have deeper content and content complexes.
Integrated model of Industrial Practices (IP) program and Final Project Course (FPC) in Diploma 3 Study Program of Mechanical Engineering in Universitas Negeri Yogyakarta
Authors: Sudiyatno  , Puspito J
Published: February 2020

The paper presents the integrated model of industrial practice program and final project course as a solution to shorten the time consumed in doing Diploma 3 in Mechanical Engineering. The model was implemented in UPT Logam Yogyakarta,where four D3 students did their IP Program. Along the students doing the program, they designed a machine as the final project. Through an intensive supervision by their industrial supervisor and lecturer, the machine was finished in 4,5 mounts. It is reduced almost 50% of the time needed to do the project in regular way. The result of the study suggested that at the beginning of sem IV (January-April), can be started from registration-briefing-correspondence with industries. In May-June, student’s choice - assigning a letter of assignment to the supervisor and determining the location of the IP Program. IP Program should be in line with its concentration. In July-August IP Program implementation, students work on the final project at the industries and the supervisor interacts with the FPC supervisor. End of August IP Program report can be completed first. Sem V (Sep- Dec) students continue to make project work in the industry. Sem VI (Jan-July) writing FPC report and doing FPC Examination.
Competency of vocational schools required by construction industry in consultants’ supervisor
Authors: Daryono R W , Yolando A P , Jaedun A , Hidayat N
Published: February 2020

This study aims to find out how much the needs of personal competence, basic knowledge, and work skills of vocational graduates Construction and Property Technology Expertise Program by the world of Construction Services Industry which is engaged in the Field Supervision Consultant. The method used to select the sample is the quota sampling and snowball sampling method where the sample is 15 companies with a population of 136 companies. The results of this study draw conclusions as follows: (1) overall competence of vocational school graduates construction and property technology expertise program included in the “very needed” category with value of 81,52 (2) personal competence included in the “very needed” category with value of 86,59, (3) basic knowledge competence included in the “needed” category with value of 80,52, and (4) competence of work skills is included in the “needed” category with a value of 78.60.
Evaluation of sea salt aerosols in climate systems: global climate modeling and observation-based analyses*
Authors: Chen Yi-Chun , Li Jui-Lin F , Lee Wei-Liang , Diner David J , Garay Michael J , Jiang Jonathan H , Wang Yi-Hui , Yu Jia-Yuh , Kalashnikova Olga V
Published: February 2020

Sea salt aerosols (SSA), one of the most abundant aerosol species over the global oceans, play important roles for Earth’s climate. State-of-the-art SSA parameterizations in global climate models (GCMs) are typically modeled using near-surface wind speed, sea surface temperature (SST), and precipitation. However, these have non-trivial biases in CMIP3 and CMIP5 GCMs over the tropical Pacific Ocean that can contribute to biases in the simulated SSA. This study investigates the impacts of falling ice radiative effects on the biases of the aforementioned modeled parameters and the resulting modeled SSA biases. We compare the CMIP5 modeled SSA against satellite observations from MISR and MODIS using a pair of sensitivity experiments with falling ice radiative effects on and off in the CESM1-CAM5 model. The results show that when falling ice radiative effects are not taken into account, models have weaker surface wind speeds, warmer SSTs, excessive precipitation, and diluted sea surface salinity (SSS) over the Pacific trade-wind regions, leading to underestimated SSA. In the tropical Pacific Ocean, the inclusion of falling ice radiative effects leads to improvements in the modeled near-surface wind speeds, SSTs, and precipitation through cloud-precipitation-radiation-circulation coupling, which results in more representative patterns of SSA and reduces the SSA biases by ∼10% to 15% relative to the satellite observations. Models including falling ice radiative effects in CMIP5 produce smaller biases in SSA than those without falling ice radiative effects. We suggest that one of the causes of these biases is likely the failure to account for falling ice radiative effects, and these biases in turn affect the direct and indirect effects of SSA in the GCMs.
Equi-energy sampling does not converge rapidly on the mean-field Potts model with three colors close to the critical temperature
Authors: Ebbers Mirko , Löwe Matthias
Published: February 2020

Equi-energy sampling (EES, for short) is a method to speed up the convergence of the Metropolis chain, when the latter is slow. We show that there are still models like the mean-field Potts model, where EES does not converge rapidly in certain temperature regimes. Indeed we will show that EES is slowly mixing on the mean-field Potts model, in a regime below the critical temperature. Though we will concentrate on the Potts model with three colors, our arguments remain valid for any number of colors

, if we adapt the temperature regime. For the situation of the mean-field Potts model this answers a question posed in Hua and Kou (2011 Stat. Sin. 21 1687–711).
The Sidewalk Transmitting Strategy As A Transit Pedestrian (Case Study: Jalan Manggarai Utara 1, Jakarta-Indonesia)
Authors: Kurniawan Dody
Published: February 2020

This study is motivated by the issue of conflicts of interest between pedestrian users and Trans Jakarta transportation service users. Current pedestrian functions aside from being a means of transferring human movements developed into a means of transit (Pedestrian Transit) of human movement. Sidewalks in the station area become a new transit point for human movement and need to be managed wisely. The existence of the Trans Jakarta shelter on Jalan Manggarai Utara 1, Manggarai Station greatly facilitates the transit of Jakarta residents who want to move to use the train facilities. On the other hand, the existence of the Trans Jakarta shelter on Jalan Manggarai Utara 1, raises problems with pedestrians. The condition of the Trans Jakarta shelter is currently taking up part of the sidewalk space, so pedestrians must go out of the sidewalk to continue their journey. This study was conducted to find out the existence of sidewalks as transit pedestrians.

From the formulation of the problem, a descriptive method will be carried out. a descriptive method is carried out to make a description, description systematically factually and accurately regarding the facts, characteristics and relationships between the phenomena investigated. This description is obtained through field observations, interviews and data from relevant agencies. The method of the approach taken to achieve the predetermined goals is the Identification of Design Norms; Identification of Comparative Studies and Identification of Potentials and Problems. The results of this study is Double Deck concept, where all TransJakarta activities (ticket purchases, waiting for buses and pedestrian circulation) are diverted to the platform on the sidewalk.
Analysis of Water Carrying Capacity in Cibinong Urban Development
Authors: Simanjuntak E R P , Sumabrata J , Simarmata H A , Zubair A
Published: February 2020

This study discusses the support of water related to the relationship between the region and availability, and its effects in the future, including the direction of spatial planning, and air requirements based on population development in the Cibinong catchment. In general, there are two main stages consist of several supporting aspects, carrying capacity of water-based on water availability and water needs. In the first stage consisting of: prediction analysis of land cover change; hydrological analysis to determine the planned rainfall for calculating the discharge of the plan; calculation of potential discharge seen from the ability of the land to collect water; and calculation of the ideal area and volume of reservoirs of water bodies. For the water needs stage are based on the calculation of demand discharge based on population projections, and land use; in accordance by applicable standards. The results show that Cibinong Urban area infiltration water experiences a downward trend from an increase in value of 0.16 m3/s/day to only 0.01 m3/s/day. As for the availability of surface water based on runoff water tends to rise statically. But the potential that can be used today as an urban water source is only 1.26 m3/s/day.
Do the state and market affect the farmer’s sovereignty? Study of organic agriculture in indonesia
Authors: Ningrum V , Subroto A
Published: February 2020

Many studies reveal organic farming as an environmentally friendly way compared to conventional agriculture. However, there is a lack of social issues discussed, such as farmer sovereignty, which has a significant impact on farmers’ sustainability in running their organic business and their social welfare in the long term. This paper aims to analyze whether government policies and market interventions affect the farmers’ sovereignty as defined in the Nyéléni declaration. We use organic farmer surveys in 4 provinces in Indonesia, which represent coconut, nutmeg, sorghum, and rice farming. By using the Partial Least Square (PLS), we concluded that government intervention has significantly influenced the condition of farmers’ sovereignty but not for market intervention. This result indicates that organic agriculture grows naturally based on nature and community. The implication is the government needs to provide capacity building for organic communities rather than by subsidizing organic fertilizers, organic seeds, and machinery as in conventional agriculture and needs to legitimate organic label guarantees from the farmer’s community.
A Review of Previous Researches’ Methods on Stakeholder Management at Construction Projects
Authors: Al-adawiyah N , Utomo C
Published: February 2020

The construction project involves many stakeholders from various disciplines and professions. Each person has his own attitude and views on the project’s development. Moreover they also have different roles. These different roles can cause conflicts if not managed properly. Under these circumstances, managing stakeholders in a construction project are very important in order to achieve successful project. Recently, research on stakeholder management is developing widely. There are many studies that discuss stakeholder management’s research using different methods. It is important to know the appropriate method for research on stakeholder management. This study discusses the method used in the previous researches about stakeholder management through a literature review of 20 papers. The result of this study is the mapping of various research methods that can be used as recommendations for determining research methods in further research in the field of stakeholder management. Furthermore, further research on concept, limitations, and variables’s mapping in the field of stakeholder management can be done so that theoretical mapping for stakeholder management is more comprehensive.
The Distribution Pattern of Co-working Space in Jakarta and Determinant Factors of Consumers’ Preferences on Location Decision
Authors: Dianovita  , Khoirunurrofik
Published: February 2020

The growth of the creative economy and advances in information and communication technologies have led to a significant change in how space is both produced and consumed. Nowadays, people can work in a variety of locations, regardless of the space or time. This change has brought with it the need for new and flexible workspaces that allows people to collaborate, thus increasing the phenomenon of co-working space in urban areas. The purpose of this study is to identify the distribution of co-working space locations and determine the factors that influence user preferences in choosing such locations in DKI Jakarta. This study employed the nearest neighbour method and principal component analysis. The research concludes that the distribution patterns of co-working space in DKI Jakarta are clustered. The densest locations of co-working space are distributed in the central area of offices, trades, and services. Meanwhile, the factors influencing consumer preferences in choosing co-working space are location and fare factors. There is a strong relationship between the co-working space locations frequently visited and the choice of transportation types. Thus, co-working spaces that do not provide large parking areas tend to set lower rates, while their users tend to use public transportation. This implies that the government can facilitate collaboration and thus, has a strategic role to play in the development of the creative economy in the city while building strong networks with other development stakeholders in the Penta-helix.
Spatial Distance And Mode Of Transportation Choices In Jabodetabek Metropolitan Area: A Sakernas 2017 Micro-Data Analysis On Commuting Pattern Of Workers
Authors: Chotib
Published: February 2020

The growth of Jabodetabek (Jakarta-Bogor-Depok-Tangerang-Bekasi) Metropolitan Areas raises several problems including the occurrence of traffic congestion in various parts of the metropolitan area. This congestion occurs partly because of the increasing number and use of private vehicles, especially by workers who commute mobility within the Jabodetabek metropolitan areas. The pattern of movement from the place of residence to the place of work in the metropolitan area is also a factor causing congestion. The purpose of this study is to find out the extent to which the distance factor measured by geographical distance and the proximity of the area between the place of residence and place of work has an impact on the preference for the use of transportation modes by workers who are commuting. In accordance with the availability of data in the Sakernas 2017 (National Labor Force Survey 2017) Micro Data, the transportation mode preference consists of two choices: public transportation mode or private transportation mode. The Sakernas 2017 micro data analysis was conducted with descriptive analysis (cross tabulation) and inferential analysis (Binary Logit Regression). The analysis shows that the probability of using public transportation tends to be used by workers whose travel distance is longer (above 10 km), in areas that do not directly border between residence and workplace, female workers, young workers, workers with education Junior high school and below,and workers who work in the agricultural sector. Urban managers covering the Greater Jakarta Metropolitan Area should continue to disseminate and promote the importance of using public transportation in travel from place of residence to place of work to reduce traffic congestion and urban air pollution.
The Usage of AI Robot in English Language Teaching for City Revitalization Case Study: Toda Daini Elementary School, Toda City, Saitama, Japan
Authors: Auliawan Althaf Gauhar , Ong Susy
Published: February 2020

In entering the era of Industrial Revolution 4.0, Artificial Intelligence (AI) becames one of Japan’s choices after experiencing economic stagnation. Without exception in education, the Japanese government continues to encourage the usage of AI to help human work because it is considered more practical and efficient. Recently, Toda City, Saitama prefecture, Japan has taken the initiative to use AI robots for English conversation classes in elementary schools. AI Robot is considered efficient because English conversation skill in Japanese schools is still lacking, and the practice still relies on the Assistant Language Training (ALT). The purpose of this study was to determine the relationship between the usage of AI robots with city revitalization through education. Besides, this study was conducted to find out the effectiveness and weaknesses of AI robots when used in teaching English in schools. This research method is a qualitative method with case studies in Toda Daini Elementary School, Toda City, Saitama Prefecture, Japan, through interviews. Also, Toda City Board of Education’s literature data was used for this study. The results of this study show that the usage of AI robots has an effect on city revitalization, and has advantages and disadvantages in implementing English teaching in Japan.
Antecedents and Consequences of Trust and Satisfaction in Main Contractor and Subcontractor Relationship
Authors: Rahman S. H. A. , Nusa F. N. M. , Md Hanafiah R. , Jusoh M. Z. , Endut I. R. , Faisol N.
Published: February 2020

Recently, the concept of developing a good relationship was adapted in the construction project environment. The project participants are realizing that the trust and satisfaction are the key elements of relationship success. Main contractors played an important role in the most projects in the construction field, also commonly referred to as subcontractors. The objective of this research is to determine the complementary role of satisfaction and trust in building and enhancing the relationship between main contractor and subcontractor. This research began with the introduction of the theoretical framework comprising six dimensions sourced from the literature describing attributes of the relationship, such as contractor’s competence, motivation, reputation, communication, shared values, and conflict handling that may affect trust and satisfaction.
Analysis of employee performance drivers: Sustainable development efforts at the organizational level
Authors: Soenanto T W , Tairas D R , Hannase M , Sulaiman S
Published: February 2020

Sustainable development based on human resources is an effort to increase effectiveness at the organizational level. This study aims to examine and analyze the influence of organizational climate and leadership on employee performance in the general secretariat of the House of Representatives of the Republic of Indonesia as a sustainable development effort at the organizational level. Sampling using convenience sampling by using multiple linear regression analysis techniques. The results showed that the organizational and leadership climate partially or simultaneously had a significant effect on employee performance. Leadership is the most influential variable on improving performance, so that the effectiveness of sustainable development can be achieved through increasing the role of leaders at each level in the organization.
The behaviour of fluid flow in a 90-degree (sliced) nonlinear bend
Authors: Abduh Moh , Suhardjono  , Sumiadi  , Dermawan Very
Published: February 2020

The behaviour of flow due to nonlinear bends in piping networks involves the occurrence of contractions and turbulence that begin when approaching the upstream part down to the downstream part; these conditions are caused by collisions between fluid particles flowing with pipe walls in sudden direction changes. Though contractions and turbulence occur in all directions along the bends, the normal flow downstream of the bends occurs quite far after the bends. The elements that influence contraction and turbulence are velocities (U), number of slices (n), length of nonlinear walls (Li), sudden angle changes (α), coefficient of friction (f), acceleration of gravity (g), and the slope of the pipe base (I). A higher flow velocity in a pipe leads to farther laminar flow returns downstream of the bends, and a smaller flow velocity leads to the flow returning to normal downstream shortly after the bends. The simulations of this research involved a 10 m/s initial velocity with a 25.4 mm pipe diameter and the number of slices (n) = 2; normal flow was achieved at 22D after the nonlinear bend. With similar velocity and different diameters of pipes, the length of contraction, turbulence, and laminar flow were equal. This analysis is expected to provide optimal benefits for performance in the usage of nonlinear bends in activities related to piping networks, especially the primary network, which uses large-diameter pipes.
Intrinsic vulnerability assessment of shallow groundwater to pollution using the GOD Method by utilizing geoelectric data: a case study of the city of Pasuruan, East Java, Indonesia
Authors: Rubiantoro Prasetyo , Gari Amrina Berlian
Published: February 2020

Groundwater is one kind of clean water resource. The increased development of human activities, such as agriculture, industry, and settlements, has a cumulative impact on groundwater conditions. The main purpose of this research is to assess the intrinsic vulnerability of shallow groundwater to pollution in the City of Pasuruan. The utilized method in the intrinsic vulnerability assessment of shallow groundwater is the GOD method, by utilizing geoelectric data. The parameters used in the calculation are aquifer layer type (G), soil layer type above the aquifer layer (O), and ground water depth (D). The City of Pasuruan has a moderate to high index of intrinsic vulnerability, and shallow water at the study site is categorized as vulnerable to pollutants.
Dynamics of lahar-affected river tributaries of the Progo river after the 2010 Mt. Merapi eruption
Authors: Ikhsan Jazaul , Legono Djoko , Pamudji Rahardjo Adam , Harsanto Puji , Fujita Masaharu
Published: February 2020

Riverbeds in the Mt. Merapi area are dominated by gravel originating from Mt. Merapi. The 2010 Mt. Merapi eruption has formed a riverbed consisting of sediments of various size. Since then, the morphology of the rivers has changed dynamically, depending upon the natural and the anthropogenic factors. Most of the rivers drain into the Progo River, whereas the main river system of Progo River drains into the Indian Ocean. The dynamics of the tributaries of volcanic rivers along the Progo River are the major concern to identify the capacity of the tributaries against potential lahar flow disasters that may occur. This paper presents the results of a series of observations of several tributaries of the volcanic rivers, taking into account the natural flow phenomena as well as the sediment mining activity along the river under investigation. The investigation included the hydraulic simulation, which employed a numerical model. The results of the simulation showed that the downstream part of the Progo River is influenced by sediment from Mt. Merapi through its tributaries. These also suggest cost-effective river tributary maintenance to mitigate the risks of lahar flow disasters.
Pool-type fishway on the Sembayat barrage
Authors: Prasetyorini Linda , Eka Nurhayati Dyan , Anwar Nadjadji , Wardoyo Wasis
Published: February 2020

This paper presents the hydraulic flow system in a fishway to simulate the flow of a pool-type fishway. A fishway is a waterway to allow some fish species to pass by a human-made obstruction in a river or stream. The construction on the river, which has no fishway, will impact the river ecosystem balance. The purpose of this research is to give an alternative to reduce negative effect on the river ecosystem because of the obstruction. The velocimeter and the flow type in fishway must be able to be passed by the fish. In a kind of the pool-type fishway, there is an orifice in the bottom that has a potential supercritical flow before it becomes subcritical flow. The purpose of this experiment is to identify the surge in the pools of the fishway. The physical model of the pool-type fishway in Sembayat Barrage, Gresik was created to analyse the hydraulic condition of the flow in the fishway structure. The velocity has a greater value than the permissible velocity of the fish, and thus several fishways are not able to function optimally because the fish refuse to swim through the fishway. From the results of the study, it can be concluded that the velocity can be reduced by adding baffles at the downstream part of the orifice.