bluuebunny/crossref_metadata_2025_split huggingface dataset:
Pengaruh Pengerasan Beton Menggunakan Superplasticizer Terhadap Kuat beton Busa
Authors: Firdaus M Royan , Nisumanti Sartika , Al Qubro Khodijah 
Published: June 2023

ABSTRACT
A new product of lightweight concrete that has a low specific gravity that is increasingly used in the world of construction is foam concrete. In this study, testing the addition of superplasticizers to the foam concrete mixture was carried out, by analyzing the effect of adding superplasticizers as much as 0.3% of the amount of cement on the process of setting time and compressive strength of foam concrete. The purpose of the study was to determine the effect of adding superplasticizers as much as 0.3% of the amount of cement on the process setting time and compressive strength of foam concrete. In this study, the method used was an experimental method. The results showed that the addition of superplasticizers to the concrete mixture can make the cement binding time longer than without the addition of superplasticizers to the concrete mixture. While in testing the compressive strength of concrete, there is a significant increase in concrete strength in concrete variations with the addition of superplasticizers, this is because the use of added superplasticizers can reduce water use so that the cement water factor becomes lower and improves concrete quality.
Keywords: Concrete Foam, Superplasticizer, Compressive Strength

ABSTRAK
Produk baru beton ringan yang mempunyai berat jenis rendah yang semakin banyak digunakan dalam dunia konstruksi yakni beton busa. Pada penelitian ini dilakukan pengujian penambahan superplasticizer pada campuran beton busa, dengan menganalisis pengaruh penambahan superplasticizer sebanyak 0,3% dari jumlah semen terhadap proses setting time dan kuat tekan beton busa. Dengan tujuan penelitian adalah untuk mengatahui pengaruh penambahan superplasticizer sebanyak 0,3% dari jumlah semen terhadap proses setting time dan kuat tekan beton busa. Dalam penelitian ini metode yang digunakan adalah metode eksperimental. Hasil penelitian menunjukan dengan adanya penambahan superplasticizer kedalam campuran beton dapat membuat waktu ikat semen lebih lama dibandingkan tanpa penambahan superplasticizer kedalam campuran beton. Sedangkan pada pengujian kuat tekan beton terjadi peningkatan kekuatan beton secara signifikan pada variasi beton dengan penambahan superplasticizer, hal tersebut dikarenakan penggunaan bahan tambah superplasticizer dapat mengurangi pemakaian air sehingga faktor air semen menjadi lebih rendah dan meningkatkan mutu beton.
Kata kunci: Beton Busa, Superplasticizer, Kuat Tekan
Pengaruh Penambahan Limbah Tempurung Kelapa Sebagai Bahan Tambah Pada Kuat Tekan Batako
Authors: Cahya M Aridya Dwiki , Destania Henggar Risa , Fauzi Marguan 
Published: June 2023

ABSTRACT
At this time the use of bricks as a wall building material has begun to be widely used, this is because the manufacturing process is more efficient compared to making red bricks. Therefore, in this study, coconut shell waste will be used as additional material to test the compressive strength of bricks and determine the best percentage of coconut shell waste added in the brick mixture. The purpose of this study was to determine the effect of adding coconut shell waste on the strength of brick determination and to determine the best percentage of brick mixture with added shell waste. The research method used is an experimental method. The test results show that bricks with 3% and 4% coconut shell added materials are very influential on the compressive strength of bricks can provide a change of 6%. However, the addition of too many added materials causes a decrease in the compressive strength value of the bricks, because the added materials do not react with the brick mixture. The best percentage occurs in the addition of coconut shell fragments by 3% by producing an average brick compressive strength value of 11.63 Mpa.
Keywords: Brick, Compressive Strength, Coconut Shell

ABSTRAK
Pada saat ini penggunaan batako sebagai bahan penyusun dinding sudah mulai banyak digunakan, hal ini karena proses pembuatannya yang lebih efisien dibandingkan dengan dengan pembuatan batu bata merah. Oleh karena itu, pada penelitian ini akan dipakai limbah tempurung kelapa yang akan digunakan sebagai bahan tambah pengujian kuat tekan batako dan menentukan persentase terbaik dari limbah tempurung kelapa yang ditambahkan dalam campuran batako. Tujuan dilakukannya penelitian ini adalah untuk mengetahui pengaruh penambahan limbah tempurung kelapa terhadap kuat tekab batako dan untuk mengetahui persentase terbaik campuran batako dengan bahan tambah limbah tempurung. Metode penelitian yang digunakan adalah metode eksperimental. Hasil pengujian menunjukan batako dengan bahan tambah tempurung kelapa 3% dan 4% sangat berpengaruh terhadap kuat tekan batako mampu memberikan perubahan sebesar 6%. Akan tetapi dengan penambahan bahan tambah terlalu banyak menyebabkan penurunan terhadap nilai kuat tekan batako, dikarenakan bahan tambah tidak bereaksi dengan campuran batako. Untuk persentase terbaik terjadi pada penambahan pecahan tempurung kelapa sebesar 3% dengan menghasilkan nilai kuat tekan batako rata-rata sebesar 11,63 Mpa.
Kata kunci: Batako, Kuat Tekan Batako, Tempurung Kelapa.
ANALISIS PERBANDINGAN GELAGAR INDUK JEMBATAN KONSTRUKSI BALOK BETON KONVENSIONAL DENGAN GIRDER BAJA KOMPOSIT JEMBATAN AIR PEDU OKI
Authors: Nisumanti Sartika , Hadiyana Djaenudin 
Published: June 2023

Economic conditions in South Sumatera Province are developing, the Government made policy by opening a new alternative rute from Palembang to Kayu Agung, Ogan Komering Ilir Regency, so the vehicles going towards Kayu Agung or otherwise can use this rute. Therefore, the construction of Air Pedu bridge that connects Jakabaring Palembang - Jejawi road with a length of 25 meters were done. The problem is the construction of the Pedu Water Bridge are use 5 prestress precast girder beams that are 1.25 meters high so that the mobilization to the location is quite difficult, so it is try to be re-planned by using conventional concrete beams which are casted on the spot and also try to be re-planned by using composite steel. Thus the bridge is planned by using conventional concrete beams and steel girder beams. The aims to compare the results of the calculation of the longitudinal girder of Air Pedu Bridge using material and concrete prestress calculation method by re-planning using the method of calculation of conventional concrete beams and steel girder beams by re-planning both methods with reference to applicable planning standards.The result is the loading of conventional concrete beams by using the quality of concrete fcâ€™= 4000 psi and reinforcing steel fy = 40000 psi gained a moment Mu=3879,6 k-ft, and rmax = 0,0371. Loading girder beam with steel profile Bj 37 with Â¦y = 240 Mpa and Â¦u = 370 MPa got the total moment Mtot = 394,01 t.m. From the results of calculations Conventional concrete beams and steel girder beams still allow for bridges with short spans, especially spans 25 meters.Keywords : Â conventional concrete girder, composite steel grider, prestressed concrete
PENGGUNAAN TRIPIKON-S SEBAGAI ALTERNATIF PENGGUNAAN SEPTIC TANK DI DAERAH TEPIAN SUNGAI DAN RAWA
Authors: Rachman Delli Noviarti 
Published: June 2023

Sanitation is one of the basic services that often get less attention. Poor sanitation conditions affect the declining quality of the environment. Kelurahan 11 Ulu - Palembang is a densely populated area located on the banks of the Musi River and heavily affected by the tides of the Musi River. The purpose of this research is to identify the existing condition of community sanitation, to make prototype of sanitation facilities in the form of MCK and septic that best suits the existing condition, calculate the estimated cost of construction, and the willingness and ability of the community to build according to the prototype Based on the analysis of the survey results, the existing condition, and the wishes of the respondents, the sanitation system in each MCK is the most suitable and with the waste handling technique using the Tripikon-S installation. The S-Tripic-installation is 3 (three) septic pipes each with different sizes concentrically installed, mounted perpendicularly. Intake PipeÃ† different according to the number of residents in each home. There are 4 types of prototypes that match the conditions in this environment, ie Tripikon-S without closet, Tripikon-S with closet, wooden toil with Tripikon-S, and Stone-to-Tripokon with S-Tripic. Cost Type 1 - Tripic-S Installation (No Closet) for capacity 1 - 5 soul with Ã†Estimated cost of tripikon with 10â€: Rp.2.567.000, for capacityÂ 6 â€“ 10 peopleÂ with Ã† pipe 14â€: Rp.3.137.000, for cpacityÂ 11 â€“ 20 people with Ã† Pipa 17â€ & 20â€/asphalt thin: Rp.4.454.500. The costs for type 2 are : - Tripikon-S instalation (with Closet), for capacity 1 â€“ 5 people with Ã† Pipe 10â€: Rp.2.732.000,for capacity 6 â€“ 10 people with Ã† Pipe 14â€: Rp.3.302.000,for capacity 11 â€“ 20 people with Ã† Pipe 17â€ & 20â€/asphalt drum: Rp.4.619.500. The costs for type 3 are - MCK wood with Tripikon-S instalation , with MCK made from wood (1,20 x 1,75 M): Rp. 2.000.000, added with Tripikonâ€“S. For type 4 costs areÂ - - MCK made by wood with Tripikon-S installation , added with MCK made from brick stone (2 x 1,5 M); Rp. 5.200.000, with Tripikonâ€“S installation.Key Words : Riverfront Sanitation, Tripikon â€“ S, WC made from brick stone, Wcmade by wood
ANALISA KEBUTUHAN LAHAN DAN KAPASITAS RUANG PARKIR RUMAH SAKIT UMUM PROPINSI DR. MOHAMMAD HOESIN PALEMBANG
Authors: Hadiyana Djaenudin , Nisumanti Sartika 
Published: June 2023

The parking area of Dr. Mohammad Hoesin Hospital is over capacity for cars because of that, the parking area had to along Dr. Moh. Ali Street which affected to traffic jam in arround Hospital area. The aims of this study are to find charateristic of parking are, to estimate parking are, to define parking issues. The analysis of this study using accumulation difference method and regression formula for parking area necessary. The result of thisÂ study is showed that maximum accumulation for motorcycle and Â cars, respectedly are 723 SRP and 608 SRP, while amounts of vehicle are 1779 and 1594 respectedly for motorcycle and car. Based on those, the entered of parking area is 1.287,5 m2. Analysis of parking area configuration is showed that configuration 30â° has 287 SRP, for 45â° has 315 SRP, for 60â° has 391 SRP, and for 90â° has 504 SRP, while a combined configuration has 540 SRP which is more effective than existing configuration. Based on the result of analysis, the parking area configuration in Dr. Mohammad Hoesin Hospital will be recommended to implementation of a combined configuration.Keyword: Parking, Parking Area, Parking Necessary
ANALISIS KEBUTUHAN SUMUR RESAPAN SEBAGAI PENCEGAHAN LIMPASAN AIR HUJAN PADA PERUMAHAN PUSRI SEMBAWA BANYUASIN
Authors: Nisumanti Sartika 
Published: June 2023

In accordance with rapid developmentÂ in Banyuasin Regency has effected the increased use of land that is built into residential areas. Land use is unwittingly can affect and disrupt the hydrological cycle which causes a negative impact on the environment. It consequenlly, it reduces soil absorption and causesÂ excessive surfaceÂ run off. Therefore there must be anticipatory steps to reduce rainwater runoff. Infiltration wells can be some to figure out the issue. This research aims to plan the infiltration wells design to reduce rainwater runoff and to know the capacity of drainage channel in Pusri Residence Sembawa Banyuasin. The result of data analysis shows that most of runoffÂ occur in drainage channel of receiver except in segment of Block A1-A2 and Block D1 - D2 and at collector channel. The largest receiver discharge (Q2) is 0.2378 on block V1 - V2. The results of the infiltration wells design is a circle with a diameter of 1 meter and a depth of 3.5 meters. The debit plan for the 2nd year return period with rain intensity 505,9905 mm / hr is 0,0296 m3 / s, while the discharge of the infiltration wells of each plot is 0,0032 m3 / dt for type 36/84. The rain water discharge of infiltration wells with a duration of 30 minutes and the number of house plots is 0.0253 m3 / s, while the discharge plan on channel A-B is 0.0296 m3 / s. After the use of infiltration wells the, remaining discharge of rain water entering on receiver channel on block A-B equal to 0,0265 m3 / s.Keywords:Â Infiltration Wells, Runoff, permeability
Value-based Software Engineering: A Systematic Mapping Study
Authors: Salleh Norsaremah , Mendes Emilia , Mendes Fabiana , Lekamlage Charitha Dissanayake , Petersen Kai 
Published: June 2023

Background: Integrating value-oriented perspectives into the principles and practices of software engineering is fundamental to ensure that software development activities address key stakeholders’ views and also balance short-and long-term goals. This is put forward in the discipline of value-based software engineering (VBSE)
Aim: This study aims to provide an overview of VBSE with respect to the research efforts that have been put into VBSE.
Method: We conducted a systematic mapping study to classify evidence on value definitions, studies’ quality, VBSE principles and practices, research topics, methods, types, contribution facets, and publication venues.
Results: From 143 studies we found that the term “value” has not been clearly defined in many studies. VB Requirements Engineering and VB Planning and Control were the two principles mostly investigated, whereas VB Risk Management and VB People Management were the least researched. Most studies showed very good reporting and relevance quality, acceptable credibility, but poor in rigour. Main research topic was Software Requirements and case study research was the method used the most. The majority of studies contribute towards methods and processes, while very few studies have proposed metrics and tools.
Conclusion: We highlighted the research gaps and implications for research and practice to support VBSE.
Effects of Climate Change on Poultry Production in Ebonyi State, Nigeria
Authors: Munonye Jane , Agu Kingley , Esiegwu Arthur C. , Agou Gabriel Daniel 
Published: June 2023

Three agricultural zones of Ebonyi State, Nigeria, were considered for this study. Using Pearson Product Moment Correlation (PPMC) to establish the relationship between the variables and how one independent variable influences the dependent variables. The study aimed at examining the effects of climate change on poultry production. The study's primary objectives were to assess the socioeconomic characteristics of poultry farmers, ascertain the extent of climate awareness, determine the effect of climate change on poultry production, determine climate change adaptation strategies for coping with it, and identify the constraints encountered in poultry production. Four local government areas in the state of Ebonyi were the locations of data collection from September to October 2021. A multistage sampling procedure was used for the collection of respondents. The study found that 56.9% of the respondents were female, 42.2% were in their active age 30 to 40, 54.9% had a Bachelor’s degree, 64.7% had spent more than years of farming experience, and 29.4% were managers of their poultry production. Farm size had little effect on poultry production; climate change had an effect on feed consumption and has caused the spread of pests and diseases and the death of young ones. According to the study's findings, the respondents were in agreement that changing to intensive livestock management and collecting runoff water in ditches during periods of drought constituted adaptation to climate change. It was determined that climate change had an enormous and negative effect on poultry production through insect infestation and disease outbreak. Therefore, relevant Nigerian government agencies should offer financial assistance to poultry farmers along with adaptation training.
Om släktföremåls betydelse för individen och hemmet
Authors: Edfelt Jeanette 
Published: June 2023

Temat för min magisteravhandling var släktföremål i hemmet, det vill säga föremål associerade med släkten. Frågeställningen gällde: hur ting kan representera släkten och hur vardagliga, ceremoniella, rituella och memorabila ting skiljer sig i placering, uppmärksamhet och användning i hemmet. Materialet för avhandlingen bestod av kvalitativa intervjuer och deltagande observationer gjorda i Jakobstad våren 2014 samt en fältdagbok med teckningar. Om informanterna kan nämnas att de har sitt ursprung och historiska rötter i bonde- och arbetarbefolkningen i Österbotten. Syftet var att utreda vad ett släktföremål kan vara och vilken dess betydelse för individen, hemmet och släktbilden var.
Den här artikeln presenterar de mest centrala resultaten från min avhandling. Jag har valt att mer ingående redogöra för följande frågor: Vad är ett släktföremål? Hur urskiljs de i hemmen? Varför (varför inte) har de en plats i hemmet? Och på vilka grunder tilldelas släktföremålen ett värde? Jag kommer att belysa släktföremålsproblematiken med exempel och citat från informanternas svar.
Forskning om hjältemod
Authors: Sissala Riikka 
Published: June 2023

Recension av: Peltonen, Ulla-Maija & Kemppainen, Ilona (red.) 2010. Kirjoituksia sankaruudesta. Helsinki: Suomalaisen Kirjallisuuden Seura. 330 s.
Tillstånd för bidragets nätpublicering saknas. Om du äger rättigheterna och vill ge tillståndet, vänligen kontakta budkavlen@abo.fi.
Islams två ansikten
Authors: Kahoul Veronika 
Published: June 2023

Recension av: Salminen, Johannes 2010. Islams två ansikten. Helsingfors: Söderströms Atlantis, 127 s.
Tillstånd för bidragets nätpublicering saknas. Om du äger rättigheterna och vill ge tillståndet, vänligen kontakta budkavlen@abo.fi.
Sex – för Guds skull
Authors: Björkqvist Jessika 
Published: June 2023

Recension av: Geels, Antoon & Roos, Lena 2010. Sex – för Guds skull. Sexualitet och erotik i världens religioner. Lund: Studentlitteratur,. 232 s.
Tillstånd för bidragets nätpublicering saknas. Om du äger rättigheterna och vill ge tillståndet, vänligen kontakta budkavlen@abo.fi.
On the Origins of Extreme Velocity Stars as Revealed by Large-scale Galactic Surveys
Authors: Li Qing-Zheng , Huang Yang , Dong Xiao-Bo , Zhang Hua-Wei , Beers Timothy C. , Yuan Zhen 
Published: June 2023

Abstract
We assemble a large sample of 12,784 high-velocity stars with total velocity V
GSR ≥ 300 km s−1, selected from RAVE DR5, SDSS DR12, LAMOST DR8, APOGEE DR16, GALAH DR2, and Gaia EDR3. In this sample, 52 are marginally hypervelocity star (HVS) candidates that have V
GSR exceeding their local escape velocities within 2σ confidence levels, 40 of which are discovered for the first time. All of the candidates are metal-poor, late-type halo stars, which are significantly different from the previously identified HVSs, which are largely massive early-type stars, discovered by extreme radial velocity. This finding suggests that our newly identified HVS candidates are ejected by different mechanisms from the previous population. To investigate their origins, for 547 extreme velocity stars with V
GSR ≥ 0.8V
esc, we reconstruct their backward-integrated trajectories in the Galactic potential. According to the orbital analysis, no candidates are found to be definitely ejected from the Galactic-center (GC), while eight metal-poor extreme velocity stars are found to have a closest distance to the GC within 1 kpc. Intriguingly, 15 extreme velocity stars (including 2 HVS candidates) are found to have experienced close encounters with the Sagittarius dSph, suggesting that they originated from this dSph. This hypothesis is supported by an analysis of the [α/Fe]–[Fe/H] diagram. From a preliminary analysis of all of the 547 extreme velocity stars, we propose a general picture–star ejection from Galactic subsystems such as dwarf galaxies and globular clusters can be an important channel to produce extreme velocity stars or even HVSs, particularly the metal-poor late-type halo population.
Carbon Abundance of Globular Cluster M22 (NGC 6656) and the Surface Carbon Depletion Rates of the Milky Way Globular Clusters
Authors: Lee Jae-Woo 
Published: June 2023

Abstract
It is well known that metal-poor red giant branch (RGB) stars show variations in some elemental abundances, including carbon, due to the internal mixing accompanied by their own in situ CN cycle in the hydrogen burning shell. With our new photometric carbon abundance measurements of RGB stars in M22 and other globular clusters (GCs) in our previous studies, M5, M3, and M92, we derive the carbon depletion rates against the V magnitude, d[C/Fe]/M

V
, for individual populations in each GC. We find the metallicity dependence of the carbon depletion rates, d[C/Fe]/M

V
∝ −0.25[Fe/H]. Our results also suggest that the carbon depletion rates of the second generation (SG) of stars are larger than those of the first generation (FG) of stars in our sample GCs, most likely due to different internal temperature profiles with different initial helium abundances between the FG and SG. Our results can provide critical constraints both on understanding the mixing efficiency in the theoretical models, which is largely unknown, and on interpretation of the observational carbon abundance evolution of the bright halo RGB stars.
Eruption of a Magnetic Flux Rope in a Comprehensive Radiative Magnetohydrodynamic Simulation of Flare-productive Active Regions
Authors: Chen Feng , Rempel Matthias , Fan Yuhong 
Published: June 2023

Abstract
Radiative magnetohydrodynamic simulation includes sufficiently realistic physics to allow for the synthesis of remote sensing observables that can be quantitatively compared with observations. We analyze the largest flare in a simulation of the emergence of large flare-productive active regions described by Chen et al. The flare releases 4.5 × 1031 erg of magnetic energy and is accompanied by a spectacular coronal mass ejection. Synthetic soft X-ray flux of this flare reaches M2 class. The eruption reproduces many key features of observed solar eruptions. A preexisting magnetic flux rope is formed along the highly sheared polarity inversion line between a sunspot pair and is covered by an overlying multipole magnetic field. During the eruption, the progenitor flux rope actively reconnects with the canopy field and evolves to the large-scale multithermal flux rope that is observed in the corona. Meanwhile, the magnetic energy released via reconnection is channeled down to the lower atmosphere and gives rise to bright soft X-ray post-flare loops and flare ribbons that reproduce the morphology and dynamic evolution of observed flares. The model helps to shed light on questions of where and when the a flux rope may form and how the magnetic structures in an eruption are related to observable emission properties.
Photometric Monitoring of the ZZ Ceti Star PG 1541+651
Authors: Clausen Mabel E. , Williams Kurtis A. 
Published: June 2023

Abstract
The Kepler and K2 missions discovered multiple ZZ Ceti white dwarf pulsators that exhibit recurrent outbursts. These outbursting white dwarfs are near the red edge of the ZZ Ceti instability strip, suggesting that the phenomenon is physically related to the cessation of pulsations. We present multi-day ground-based monitoring of the poorly studied red-edge ZZ Ceti pulsator PG 1541+651. We do not detect any outbursts in our data. We do find that this pulsator has a very rich and time-variable spectrum of modes in its periodogram. The white dwarf lies in the northern continuous viewing zone of TESS; therefore, it has extensive archival light curves ripe for a detailed asteroseismic analysis of this star.