bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lecture Scheduling System Using Welch Powell Graph Coloring Algorithm in Informatics Engineering Departement of Universitas Malikussaleh
Authors: Abdullah Dahlan , Nurdin  , Yaton Marsali , Sujatmiko Heri , Kristanto Sepyan Purnama , Nazmi Hendra , Sridanti Irma Lisa , Suhendi Andang , Hasibuan Abdurrozzaq , Kurniawati Renny , Harahap Darmadi Erwin , Hutabarat Hendry Dinus , Sudarsana I Ketut 
Published: November 2019

Abstract
Scheduling lectures is a routine work in the academic system in higher education every time to facing a new semester. In the implementation, often the schedule that has been issued has not been fixed so it requires to rescheduling. For this reason, a new lecture scheduling system is needed using the Welch Powell Graph Coloring Algorithm. This study was done in the Informatics Engineering Departement of Universitas Malikussaleh using the subjects schedule during 2013, 2014 and 2015. Based on the results of this study it can be concluded that the Welch Powell Graph Coloring Algorithm can solve properly the problem of scheduling lectures, in this case there are no clashes between scheduled components.
Detection System of Aceh Ethnic Music Types Based On Sound Using the Hubbard Stratonovich Transformation Method
Authors: Nurdin  , Abdullah Dahlan , Putri One Charita , Satria Erwinsyah , Rianita Dian , Liantoni Febri , Yuliwati  , Wijayanti Asri , Sujinah  , Madinah  , Rosiska Evan , Erwinsyah Alfian , Syahputra Hendra , Sudarsana I Ketut 
Published: November 2019

Abstract
Sound is a natural and efficient communication media to get an information. In everyday discoveries, someone is always looking for information with other people. Voice with information and data that someone wants to get through various media. Not only by talking we can get information, one of them is through by music. Not only as entertainment, music also have many benefits. At this time maybe not many people know what Indonesian traditional music is, especially Aceh music. Because in this modern era there are so many people who are starting to leave traditional Indonesian music, there are some people who do not know it, even do not want to know it at all for many reasons. One way it can be used to provide information about computer vision used in this study. This research was built using Borland Delphi 7.0 programming language. The sound recognition process is done by inputting the sound sample results and also the sound inputted will produce energy using the Hubbard Stratonovich Transformation method. The results showed that the system depends on the accuracy of the sound technique used, and also obtained an average of an average of around 60% to 90%. Using this system is expected to help release the types of music from Aceh.
Local Potential of West Kalimantan’s Mangrove Ecosystem as A Study Material in Biology Education at Mangrove Area School
Authors: Mendala  , Suryadarma I G P 
Published: November 2019

Abstract
West Kalimantan has the local potential of mangrove ecosystems to become a source of biology education. Utilizing the local potential as a source of learning provides opportunities for students to understand phenomena directly from nature so that they can foster environmental care attitude. This research aims to create a sudy material in the form of student worksheets or Lembar Kerja Peserta Didik (LKPD) based on the local potential of the mangrove ecosystem in West Kalimantan. The method used in this research was the Four-D (4D) Research and Development model proposed by Thiagarajan. The data were collected through validated questionnaires and student response questionnaires. The results showed that the developed LKPD was feasible to use, seen from the results of the validator’s assessment with an average value on each aspect at 87.60% (very valid category) as well as the practicality value of the students’ responses with an average value on each aspect at 86.14% (very good category). The developed LKPD can also enhance the understanding in biology education about mangrove ecosystems and fostering an environmental care attitude and scientific attitude. Hence, it becomes a solution to anticipate environmental damage in Indonesia, especially through the mangrove forest conservation area in West Kalimantan.
Mangrove diversity and sustainability in karangsong village of indramayu regency, west java
Authors: Majesty Kirstie Imelda , Karuniasa Mahawan , Herdiansyah Herdis 
Published: November 2019

AbstractMangrove forests in the northern coastal region of Karangsong Village, Indramayu Regency, West Java, form a crucial component of the livelihoods of coastal communities. The objective of this research is to know the diversity of species and mangrove vegetation based on growth level. The research method is explorative survey technique method. The data collection for the research vegetation data from 10 plots divided from observed tracks. This study resulted in the observation 9 species of plants:Avicennia marina, Avicennia alba, Rhizophora mucronata, Rhizophora stylosa, Rhizophora apiculata, Terminalia catappa, Casuarina equisetifolia, Ziziphus mauritiana, andThespesia populnea. From the analysis, it is knownRhizopora mucronataare the dominant species in the Karangsong Village Mangrove Ecotourism area within three growth phases (seedling, sapling, and mature), which evidenced from the frequency of their presence in 7 (seven) sample plots. Based on the analysis of data obtained, the index of diversity (H’) of vegetation in mangroves and coastal of study area is 1.75, which means that this area has medium vegetation diversity. The calculated Dominancy Index for Karangsong Village Mangrove Ecotourism area is 0.210, which indicates that mangrove species has scattered growth pattern, thus means moderately high in diversity.
Recent recovery of the boreal spring sensible heating over the Tibetan Plateau will continue in CMIP6 future projections
Authors: Wang Meirong , Wang Jun , Chen Deliang , Duan Anmin , Liu Yimin , Zhou Shunwu , Guo Dong , Wang Hengmao , Ju Weimin 
Published: November 2019

Abstract
The spring sensible heating (SH) over the Tibetan Plateau (TP) serves as a huge ‘air pump’, significantly influencing the Asian summer monsoon, has experienced a decreasing trend. However, it remains unclear whether this decline will continue. Therefore, we here examine the long-term trends of spring SH over the central and eastern TP (CETP) based on a meteorological station-based calculated SH dataset, and CMIP6 multi-model simulations. These two sources confirmed the previous finding that the SH peaks in May. Further, we find that the declining SH was replaced by a fast recovery after approximate 2000 in the station-based SH. This is to some extent verified by the historical simulations of CMIP6 models. Importantly, CMIP6 future projections suggest that this increasing trend will continue, and get stronger with higher radiative forcing from SSP126 to SSP585. Mechanism analysis indicates that the previous decreasing trend in SH was mainly caused by the decline of 10 m wind speed, while the recent and future increasing trend results from the rising ground-air temperature difference. We suggest that this increasing trend of spring SH over the CETP may serve as an alternative driver for the enhancement of the East Asian summer monsoon in the future.
Renewable-powered desalination as an optimisation pathway for renewable energy systems: the case of Australia’s Murray–Darling Basin
Authors: Heihsel Michael , Ali Syed Muhammad Hassan , Kirchherr Julian , Lenzen Manfred 
Published: November 2019

Abstract
The ecology in the Murray–Darling Basin in Australia is threatened by water scarcity due to climate change and the over-extraction and over-use of natural water resources. Ensuring environmental flows and sustainable water resources management is urgently needed. Seawater desalination offers high potential to deliver water in virtually unlimited quantity. However, this technology is energy-intensive. In order to prevent desalination becoming a driver of greenhouse gases, the operation of seawater desalination with renewables is increasingly being considered. Our study examines the optimisation of the operation of a 100% renewable energy grid by integrating seawater desalination plants and pipelines as a variable load. We use a GIS-based renewable energy load-shifting model and show how both technologies create synergy effects. First, we analyse what quantity of water is missing in the basin in the long run. We determine locations for seawater desalination plants and pipelines to distribute the water into existing storages in the Murray–Darling Basin. Second, we design a pipeline system and calculate the electricity needed to pump the water from the plants to the storages. Third, we use the combined renewable energy load-shifting model. We minimise the total cost of the energy system by shifting energy demand for water production to periods of high renewable energy availability. Our calculations show that in such a system, the unused spilt electricity can be reduced by at least 27 TWh. The electricity system’s installed capacity and levelised cost of electricity can be reduced by up to 29%, and 43% respectively. This approach can provide an annual net economic benefit of $22.5 bn. The results illustrate that the expansion of seawater desalination capacity for load-shifting is economically beneficial.
Global divergent responses of primary productivity to water, energy, and CO2
Authors: Liu Zhiyong , Chen Lei , Smith Nicholas G , Yuan Wenping , Chen Xiaohong , Zhou Guoyi , Alam Syed Ashraful , Lin Kairong , Zhao Tongtiegang , Zhou Ping , Chu Chengjin , Ma Hanqing , Liu Jianquan 
Published: November 2019

Abstract
The directionality of the response of gross primary productivity (GPP) to climate has been shown to vary across the globe. This effect has been hypothesized to be the result of the interaction between multiple bioclimatic factors, including environmental energy (i.e. temperature and radiation) and water availability. This is due to the tight coupling between water and carbon cycling in plants and the fact that temperature often drives plant water demand. Using GPP data extracted from 188 sites of FLUXNET2015 and observation-driven terrestrial biosphere models (TBMs), we disentangled the confounding effects of temperature, precipitation and carbon dioxide on GPP, and examined their long-term effects on productivity across the globe. Based on the FLUXNET2015 data, we observed a decline in the positive effect of temperature on GPP, while the positive effects of precipitation and CO2 were becoming stronger during 2000–2014. Using data derived from TBMs between 1980 and 2010 we found similar effects globally. The modeled data allowed us to investigate these effects more thoroughly over space and time. In arid regions, the modeled response to precipitation increased since 1950, approximately 30 years earlier than in humid regions. We further observed the negative effects of summer temperature on GPP in arid regions, suggesting greater aridity stress on productivity under global warming. Our results imply that aridity stress, triggered by rising temperatures, has reduced the positive influence of temperature on GPP, while increased precipitation and elevated CO2 may alleviate negative aridity impacts.
Increase of the transient climate response to cumulative carbon emissions with decreasing CO2 concentration scenarios
Authors: Tachiiri K , Hajima T , Kawamiya M 
Published: November 2019

Abstract
Near-constancy of the transient climate response to cumulative carbon emissions (TCRE) facilitates the development of future emission pathways compatible with temperature targets. However, most studies have explored TCRE under scenarios of temperature increase. We used an Earth system model (MIROC-ESM) to examine TCRE in scenarios with increasing and stable CO2 concentrations, as well as overshoot pathways in which global mean temperatures peak and decline. Results showed that TCRE is stable under scenarios of increasing or stable CO2 concentration at an atmospheric CO2 concentration (pCO2) double the pre-industrial level. However, in the case of overshoot pathways and a stable pCO2 scenario at a quadrupled pCO2 level, the TCRE increases by 10%–50%, with large increases over a short period just after pCO2 starts to decrease. During the period of pCO2 increase, annual ocean heat uptake (OHU) and ocean carbon storage (CO) (or cumulative ocean carbon uptake from the start of the experiment) exhibit similar changes, resulting in a stable TCRE. During the pCO2 decrease period, after a sudden TCRE increase when pCO2 starts to decrease, the OHU decreases and CO increases (relative to the pCO2 increase period) balance each other out, resulting in a stable TCRE. In overshoot pathways, the temperature distribution when the global mean temperature anomaly cools to 1.5 °C reveals small warming over land and large warming over the oceans relative to the 1% per annum pCO2 increasing scenario, particularly in some high-latitude areas of both hemispheres. The increase in TCRE with overshoot pathways decreases the carbon budget for the temperature anomaly targets in such scenarios. Our analysis showed a 16%–35% decrease in the remaining carbon budget for the 1.5 °C global warming target, in comparison with the reference scenario with a 1% per year pCO2 increase, for pathways peaking at the doubled pCO2 level followed by decline to the pre-industrial level.
Possibility of application of peat from Mitoginskoye deposit of Kamchatka Krai for purification of waste geothermal heat carrier mediums from toxic compounds
Authors: Gorbach V A , Danilov I V 
Published: November 2019

Abstract
On the basis of literature review and patent investigations methods of cleaning natural and technical waters of toxic compounds are surveyed. The possibility of applying peat from Mitoginskoye deposit of Kamchatka krai for cleaning up spent geothermal heat carrier mediums, which are formed on the geothermal deposits in exploitation, of toxic compounds with the purpose of decreasing environmental impact is assessed.
Thermo-hydrodynamic model of the Koshelev geothermal system, Kamchatka, Russia
Authors: Pashkevich R I , Mamaev D V 
Published: November 2019

Abstract
The results of numerical thermo-hydrodynamic simulation of Koshelev geothermal system are presented. The question of the possibility of the existence of a shallow geothermal reservoir at the Lower-Koshelev thermal field is briefly investigated. The simulation results refute the assumption of the existence of a near-surface geothermal reservoir. It is more likely that in this part of the geothermal system there is a region of permeable rock that is relatively narrow in cross section and which performs the function of a conduit. The size and shape of the apical part of the steam zone under the Lower-Koshelev thermal field are controlled by the diameter of the conduit. Results of simulations with a conduit diameter of 1200 and 500 m are presented. The latter is more likely, since it best matches the field data.
An uncoupled radial thermoporoelastic model with local thermal non-equilibrium
Authors: Suárez-Arriaga M C 
Published: November 2019

Abstract
A new analytic model is introduced to describe rock deformation produced by fluid injection / extraction in geothermal reservoirs. This model is fully coupled under isothermal conditions and thermally uncoupled if local thermal non-equilibrium (LTNE) is considered. The model describes both fluid flow with conductive-convective heat transfer and rock deformation in cylindrical coordinates. There are 13 unknowns in the model: fluid pressure, fluid content variation, solid skeleton displacement, radial, tangential and volumetric strains, two stresses, porosity, solid deformation velocity, fluid velocity, rock and fluid temperatures. Considering LTNE, there is an effective heat transfer between the solid skeleton and the liquid. The porosity is estimated as a function of fluid pressure and temperature. The solid radial deformation is an irrotational vector field, thus the fluid content variation, is proportional to pore pressure, which is calculated using the classical Theis solution. Therefore, the solid radial displacement can be obtained in analytical form. Once the fluid velocity is computed, the fluid temperature is deduced from a new analytical solution of the diffusion-convection equation. This model is didactic, useful and simple. It allows to explore different options for both the fluid and the poroelastic parameters, with different boundary conditions. Graphic results illustrate practical cases with fluid extraction/injection into a reservoir using real data.
Total resistance analysis on bow form model ulstein X-bow with various angle of flare and stem angle
Authors: Kiryanto  , Hadi E S , Firdhaus A 
Published: November 2019

Abstract
The current bow form named X-Bow can face waves coming towards the ship by breaking waves more subtly. Based on the Ulstein X-bow design patent, there are provisions such as angle of flare bow and stem angle. Continue the previous research that investigates comparison of total ship resistance between conventional bow and x-bow on ship; this study aims to show the impact from various angle of flare bow and stem angle on total ship resistance by Computational Fluid Dynamic. Results are summarized in tables and graphs, showing that angle variations on the bow with 6° stem and 10° flare has the most optimal ship performance at 14 knots with a total resistance value 383,13 kN compared to the original model of 385,62 kN, which decreased by 0.64%.
The role of ethanol as cosolvent on the separated gasoline methanol blend
Authors: Waluyo B , Wardana I N G , Yuliati L , Sasongko M N , Setiyo M 
Published: November 2019

Abstract
This article aims to reveal the role of ethanol as a cosolvent in maintaining the stability of a gasoline methanol blend. Polar methanol was mixed with polar gasoline with a fraction of 30, 50 and 70% v/v at room temperature and atmospheric pressure. Ethanol titration in gasoline methanol mixtures was conducted to determine the ethanol content needed to maintain the stability of the methanol-gasoline blend. Mixing stirring was done manually. A blend of gasoline-ethanol-methanol was waited for 120 minutes to ensure the mixture was not separated. The results of the study show that ethanol has a role as a cosolvent where the OH (hydroxyl) as the head (polar) is attached to the polar methanol molecule while the CH (hydrocarbon) group as the tail (non-polar) interacts with the non-polar gasoline molecule.
Toward sustainable electroplating of decorative silver for SMEs in Indonesia
Authors: Widayatno T , Hamid  
Published: November 2019

Abstract
Decorative silver electroplating has been a long time conducted by small and medium enterprises (SMEs) in Indonesia. Environmental pollution associated with the electroplating SMEs activities has created serious problems. For example SMEs of silver electroplating has contaminated groundwater which is no longer fit for domestic consumption due to its high level of cyanide contamination. Inefficient process and the use of high concentration of cyanide based electrolyte have been claimed to be the root cause. Therefore, the process of decorative silver electrodeposition in SMEs would be improved by developing an electrolyte with low cyanide concentration, determining onset potential and current densities, and modifying the process and the electrochemical cell so that the process would be more efficient and sustainable. A new electrolyte composed of AgNO3 and KCN with a ratio of 5:39 were chosen for the experimentation. For this electrolyte, silver would possibly be electrodeposited at potentials ranging from -2.2 V to -2.8 V. Corresponding current densities for silver electrodeposition would be between -2 and 7 mA/cm2. To improve the process, a new design of electrochemical reactor has been developed which ensure improvement of the observed electrochemical parameters i.e. the uniform current density distribution, the larger area of anode, and the stability of electrodes distance and position.
Effect of tofu waste flour composition to hedonic test level and proximate test of Bread
Authors: Sari A M , Syamsudin AB 
Published: November 2019

Abstract
The tofu solid waste (TSW), known as okara in Japan, is a solid waste of the tofu industry, usually disposed or sold at a low price. Its shelf life is short due to the high moisture. In hence the protein, carbohydrate and fiber content of TSW is high; it is potential to be used as food products such as flour. To expand the shelf life of the TSW, it was utilized into flour. In this research, the TSW is processed into flour as raw material of bread. The purpose of this study was to determine the effect of TSW flour composition as raw material for bread, such as organoleptic tests (aroma, texture, and taste) and proximate test (protein, carbohydrate, fat, and dietary fiber) of bread produced. The experimental design was conducted by the composition of TSW flour variable, i.e. 0% (R1), 5% (R2), 10% (R3), and 15% (R4). The results showed that the greater the TSW flour composition, the lower the sensory value of panelists. The most favored sensory test was R2 sample, 5% tofu waste flour bread with the sensory score of favorite, texture, aroma, taste, and color of 2,71, 2,86, 3,14, 2,79 and 3. From the proximate test, the 5% TSW flour bread contains higher carbohydrate, protein, moisture content than 10% while the nutritional value was 44,39% carbohydrate, 6,45% fat, 9,16% protein, 39,3% moisture, 0,7% ash and 5,94% dietary fibre.
The flexural buckling comparison between open and close cross sections in high column structure
Authors: Rhini W D , Sri F 
Published: November 2019

Abstract
Selection a cross-section of column on building construction needs to keep on a constant review to flexural buckling. The flexural buckling of column affects construction behavior overall. The aim of this study is comparing open and close of a cross-section column profile against flexural buckling. The hollow and pipe are representing close cross-sectional column profiles while I and T profiles are other represent. All profiles used the same material and properties, 400 Mpa of tensile strength and 740 mm2 area of cross-sectional. The high of column was 24 m which, both ends be fixed. Load Resistance Factor Design (LRFD)- SNI 1729:2015 method was applied to analyze the flexural buckling. The T profile was a control to determine percentage of column slender other profiles. The result showed that the slender was 53.43%, 75.57%, and 86.67% for hollow, pipe, and I respectively to T profile. The study indicates that the high column and inertia of cross-sectional were important role in flexural buckling failure.
Enhancement of genetic algorithm optimization on distribution operation control by fuzzy inclusion
Authors: Ulinuha A , Ariyanto G 
Published: November 2019

Abstract
The optimal control of distribution system operation is presented in this paper. The objective of the control is minimum real power loss simultaneously achieved with voltage profile improvement. The distribution system equipped with Load Tap Changer (LTC) and switchable Shunt Capacitors is optimally controlled by determining the tap position of LTC and switching status of Shunt Capacitor at every hour for the 24-hour period. Two Genetic Algorithms (GAs) are developed for load curve partition and hourly components status determination. The performance of GA for components optimal scheduling is further enhanced by integrating Fuzzy Strategies in fitness evaluation and constraints satisfaction. The scheme of Fuzzy Convex Decision Making (FCDM) that provides flexible objective achievement and soft constraints is employed. This enables considering more extensive solutions that may lead to better optimal control. The proposed control strategy is implemented on 30-bus distribution system and the system improvements are observed. The enhancement of fuzzy integration is highlighted.