bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Structuring and Empowerment Policy of Losari Beach Street Vendors Based on The Concept of Smart City
Authors: Ahdi P S , Akil A , Ramli M 
Published: December 2021

Abstract
Mining activities in open pit and underground mines will always be associated with rock breaking or stripping activities (both mechanical and blasting), so that this can affect the structure and strength of rocks. The strength of the rock is strongly influenced by the presence of initial cracks (pre-existing cracks) and rock anisotropy conditions associated with discontinuous plane conditions. Fracture mechanics is a science that illustrates how a fracture can occur and propagate during applied stress on material. The main parameter in fracture mechanics is called fracture toughness which shows the resistance of the material to propagate the crack. There are several mode in determining type I fracture toughness, one of which is type I fracture toughness Flattened Brazilian Disc (FBD) mode. Type I fracture toughness test is carried out using a compression machine in a laboratory and is conducted on concrete samples consisting of 3 (three) various samples, with a ratio of cement and sand composition of 1:1, 1:2, and 2:1. This test also uses different loading rate values, namely 2.50 mm/min, 2.70 mm/min, and 2.83 mm/min. The results of the type I fracture toughness value from each loading rate will be compared to determine the effect of the loading rate on the value of type I fracture toughness. The obtained fracture toughness value is also related to the physical and mechanical properties of the samples. Based on the results of tests, it can be seen that the loading rate affects the value of fracture toughness, the increase in fracture toughness value is followed by the higher loading rate. In addition, it can be seen that the fracture toughness value is directly proportional to the uniaxial compressive strength value and the indirect tensile strength value. The average correlation value obtained is R2 = 0.9884 (indicating a strong relationship).
Alternative Using of Fine Aggregate in Concrete with Acid Curing
Authors: Sandy D , Tonapa S R 
Published: December 2021

Abstract
One of the most widely used construction materials is concrete. Concrete technology is currently developing, one of which is looking for alternative materials concrete forming. This research focuses on the use of slag as a fine aggregate in concrete, especially in environments containing sulfuric and chloride acid. Observations were made by testing compressive strength, indirect tensile strength, and flexural strength, with 171 cylindrical specimens and 27 sample beam specimens. The test results show that the relative percentage of compressive strength of normal concrete on H2SO4 curing against normal curing decreased 1.85% and 2.58% on HCl curing. The biggest reduction in the percentage of concrete compressive strength was found in 30% slag substitution with a value 8.42%, while the percentage reduction in the relative strength of the indirect tensile strength concrete is found in concrete with a slag substitution of 35% with a value 9.26%. As well as the decrease in relative percentage of flexural strength was found in 35% slag substitution with a value 12.84%. Although there is a decrease in each characteristic of concrete, slag material can be used as a constituent for concrete under environmental conditions of sulfuric acid and chloride acid.
Experimental Study of the Bearing Capacity of Helix Pile Foundation
Authors: Sangle P R , Febriani L 
Published: December 2021

Abstract
The use helix pile foundations in supporting structures on peat soil has became a challenge for road infrastructure. The helix pile foundation is an alternative for substituting the pile foundation if hard soil is located too far from the surface. Therefore, in this study we examine the bearing capacity of the helix pile foundation on peat soil, including analyzing the effect of the number of helix plates on the bearing capacity of the peat soil. The type of foundation used is a helix pile foundation with a single blade, double blades and triple blades. From the results of the research the bearing capacity of helix double is 35% greater than the bearing capacity of a single helix, the value of triple helix bearing capacity is 25% greater than the double helix and 70% of the single helix. The more number of helix plates used, the greater the bearing capacity of the piles given.
The Effect of Using Linear Low Density Polyethylene (LLDPE) Powder and Rice Husk Asn on Compressive Strength and Intital Setting Time of Alkaline-Activated Mortar
Authors: Sofyan M , Irlan A O , Rokhman A , Purnama D D , Utami R R R 
Published: December 2021

Abstract
Fly Ash, Rice Husk Ash and Linear Low Density Polyethylene (LLDPE) Plastic Waste also contribute to environmental problems. Starting from the problem of CO2 emissions to ecosystem damage due to the accumulation of waste on the earth’s surface. Therefore, this study focuses on the use of Fly Ash, Rice husk ash and LLDPE Powder as a mixture of Alkaline-Activated Mortar. In this study, Fly Ash as a Pozzolanic Material mixed with Alkaline Activator Solution serves as a binder for Mortar. Rice husk ash is used as a substitute material for Fly ash while LLDPE powder functions as a substitute material for sand. The percentage of LLDPE powder used in the mortar mixture is from 0 to 15% of the total weight of the mixture. While the percentage of rice husk ash used in the mixture is 7%, Alkali Activator Solution 27% and Sand ranging from 24.5 to 39.5%. There are six variations of the mortar specimen (AAMP1, AAMP2, AAMP3, AAMP4, AAMP5, AAMP6). Initial setting time testing is done on binder mortar. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes. The mortar compressive strength test was carried out at the age of 7 days after curing the oven at temperatures of 40°C and 60°C. From the test results obtained the highest compressive strength of 11.3 MPa on the AAMP6 test object with a curing temperature of 60°C where the percentage of LLDPE powder on the specimen is 15%. The core of the longest setting time is in the AAMP6 Alkaline-Activated Mortar binder variation, which is 180 minutes.
The Volumetric Analysis of Porous Mixture Containing Modified Plastic Waste
Authors: Aprianti E , Runtulalo D , Zaifullah A M H 
Published: December 2021

Abstract
Porous Asphalt mixture is an asphalt mixture that uses open graded which has a functions as a drainage so that rainwater will not generate aqua planning on the road surface. The purpose of this study was to analyse the volumetric of modified asbuton with plastic waste and with no plastic waste of a mixture of porous asphalt. In this study we used asphalt porous specimens with dimensions of 10 cm in diameter and 8 cm in height. The specimens were made in 3 variations: 0% plastic, 0.5% 1.0% plastic with 9 specimens. This study uses PET (Polyethylene Terephlate) and laboratory experimental-based, where the gradation of porous asphalt mixture refers to the specifications of the Road Engineering Association of Malaysia (2008). The results of this study describe that there was an increase in VIM value due to the addition of PET plastic waste which is plastic is a replacement of aggregate total weight.
The Analysis of Delayed Duration Caused by Unpredictable Factors in Pammukkulu Dam
Authors: Fatkhurrahman D J A , Latief R U , Burhanuddin S 
Published: December 2021

Abstract
This study aims is to find the critical path which caused delay on the projects. Several factors which may affect to the delay are the weather, the lack of manpower, supply chain, equipment and so on. The research methodology was conducted to elaborate the causes are by using qualitative and quantitative researches. Over 35 respondents and 10 expert’s interviewee fill the questioner and were collected within two months. The result obtained is accelerated 3 paths from critical path method (CPM) then calculated the crashing program for each alternative. The alternative of acceleration applied are add the working hours in 4 (four) hours and 7 (seven) hours. In the end, the addition of 4 (four) hours could increase the workforce up to 25% of the total number of workers to get the value of accelerated finishing projects without ignoring the quality and quantity of them. Also, the additional labour is more beneficial in terms of costs they have relativity small number of working hours and would be more efficient.
Additional Value of Bandeng Fish Fishing Business in The District Pinrang
Authors: Putri A R , Rukmana I , Rahmadanih  
Published: December 2021

Abstract
Milkfish is no longer just a superior commodity in Pinrang Regency, but it has become an inflation suppressor in South Sulawesi, so that representatives of Bank Indonesia South Sulawesi have made the milkfish commodity a development cluster in Pinrang Regency. This study aims to analyze the added value of various types of milkfish products processed by milkfish processing household industries in Pinrang Regency. The research was conducted in Pinrang Regency, South Sulawesi Province. The location selection was carried out purposively with the consideration that the location is an area where milkfish processing is located. The respondents used were one home industry. The data analysis used is descriptive qualitative method of data and information and Hayami method. The results showed the added value produced by the processing of boneless fish products with a small size of Rp. 3,450, - / head, medium size Rp. 6.182, - / head, large size Rp. 15,972, - / fish, shredded fish bone product Rp. 41,991, - / pack and Meatball products Rp. 60,923, - / pack. This shows that the development of the milkfish processing industry provides added value (positive). It is hoped that the government can further develop the milkfish processing industry in Pinrang Regency because it can provide beneficial value for milkfish farmers.
Cooling Seasonal Performance Factor (CSPF) Application in Indonesia for Residential Air Conditioning (AC) Unit
Authors: Irsyad Achmad Rofi , Pasek Ari Darmawan , Philander Evan 
Published: December 2021

Abstract
As an archipelago country located around the equator line, Indonesia has a broad ambient temperature range of varying atmospheric conditions. This issue should be concerned with applying ISO 16358-1 to calculate Seasonal Energy Efficient Ratio (SEER) on cooling, or so-called the Cooling Seasonal Performance Factor (CSPF). The ISO 16358-1 recommend a set of bin temperature which can be used as the basis for calculating the CSPF. The research objectives are to compare the local ambient temperature of four cities in Indonesia (Jakarta, Bandung, Pontianak, and Palembang) with the ISO bin temperature. The normal distribution graph of temperature for every four cities in Indonesia shows a remarkable difference from the ISO bin temperature. Jakarta’s most occurring temperature range is 25 – 30 °C, Bandung is 21 – 23 °C, Pontianak is 24 – 26 °C, and Palembang is 24 – 26 °C, annually. Those numbers were compared to the ISO, which has the most occurring temperature range around 24 - 28 °C. The result on CSPF calculation of AC unit sample in the range of 4,000 – 17,000 Btu/hr (both non-inverter and inverter) using Indonesia local bin temperature compared with the ISO bin temperature has an average range of 5.10%. It was concluded that Indonesia’s local ambient temperature affects the CSPF value, especially on the AC inverter unit. On the other hand, the relatively small difference value of CSPF has an advantage in applying the ISO bin temperature for future Indonesia’s energy conservation policy. It could lead to harmonizing with other South-East Asian (ASEAN) countries specifically, and another country also applying the ISO 16358-1, in general.
Study on the effect of various burnable poisons on pebble bed reactor with OTTO fuelling schemes using Serpent 2 Monte Carlo code
Authors: Sidharta Nicholas , Arjuna Almanzo 
Published: December 2021

Abstract
Pebble bed reactor with a once-through-then-out fuelling scheme has the advantage of simplifying the refueling system. However, the core upper-level power density is relatively higher than the bottom, producing an asymmetric core axial power distribution. Several burnable poison (BP) configurations are used to flatten the peak power density and improve power distribution while suppressing the excess core reactivity at the beginning of the burnup cycle. This study uses HTR-PM, China’s pebble bed reactor core, to simulate several burnable poison (BP) configurations. Serpent 2 coupled with Octave and a discrete element method simulation is used to model and simulate the pebble bed reactor core. It is found that erbium needs a large volumetric fraction in either QUADRISO or distributed BP to perform well. On the other hand, gadolinium and boron need a smaller volumetric fraction but perform worse in radial power distribution criteria in the fuel sphere. This study aims to verify the effect of BP added fuel pebbles on an OTTO refueling scheme HTR-PM core axial power distribution and excess reactivity.
Gasoline Engine Performance, Emissions, Vibration And Noise With Methanol-Gasoline Fuel Blends
Authors: Wirawan Tri Susilo , Eka Putra Andi Erwin , Aziz Nasruddin 
Published: December 2021

Abstract
The consumption of fossil fuels raises major issues, such as energy availability and environmental preservation. In order to minimize these issues, it is important to propose alternative fuel. Alternative fuel to be proposed should be easy to apply current type of enginethat do not require engine modification and environmentally friendly. This study aims to determine the effect of addition of methanol as a non-fossil fuel mixture into RON 88 gasoline. The ratio of mixture is 80% of RON 88 gasoline and 20% of methanol. We conducted the experiment to determine the mixture effect on fuel properties, engine performance, engine vibration, engine noise, and exhaust emissions. The engine simulation utilized the TV-1 engine (Kirloskar Oil Engines Ltd.). The results show that the engine performance of fuel mixed with methanol tends to be better even though the fuel consumption is higher, the highest specific fuel consumption in the methanol mixture is 2.9 kg/kwh while the specific fuel consumption for gasoline without a methanol mixture is 2.64 kg/kwh. The largest engine vibration occurred in the measurement of the vertical radial direction of 36 m/s2 and 34 m/s2 for with methanol and without the addition of methanol, at 1200 rpm to 1600 rpm respectively. Engine noise is higher for fuel mixed with methanol with the largest value of 86.4 dB compared to 85.7 dB for pure gasoline. Lower emission levels for fuel blended with methanol, where the highest HC emission for pure gasoline is 32 ppm while fuel mixed with methanol is 17 ppm.
Analysis and evaluation of the effect of reflectance values on internal walls, internal roofs, and light shelf on optimal illumination levels in the diploma economics and business building of the vocational school UGM, Yogyakarta
Authors: Utsman S , Rachmawan B , Mohammad K R 
Published: December 2021

Abstract
The use of natural light as a source of lighting in buildings is an option in energy saving. One of the efforts that has been made is the installation of a light shelf. The light shelf installed in the UGM Vocational School Economics and Business Diploma (DEB SV) building is not fully working optimally. As many as 83% of the light shelf in lecture rooms is covered by curtains because it is considered to produce excess light (glare). This results in a greater consumption of lighting electricity. This study was conducted to analyze and evaluate the effect of the reflectance value (color) attached to the internal walls, internal roof, external light shelf, and internal light shelf on the indicator of illumination levels Useful Daylight Illuminance (UDI). Furthermore, this study aims to determine the optimum reflectance value (color) parameter. The research was conducted with a simulation method using RadianceIES in the IESVE 2021 software. The first simulation results show the value of reflectance (color) installed (base case) on the internal wall, internal roof, external light shelf, and internal light shelf in one of the lecture rooms of the DEB SV UGM building resulting in a very large value of the UDI>2000lux indicator, which is 84,9% (not according to the criteria). The results of the second simulation provide two variations of the optimum reflectance (color) parameters in the independent variable. The first variation is the internal walls, internal roof, external light shelf, and internal light shelf, each of which has a reflectance value (color) of 90,67% (beige), 100% (white), 90,67% (beige), and 100% (white). The second variation is the internal walls, internal roof, exte rnal light shelf, and internal light shelf, each of which has a reflectance value (color) of 90,67% (beige), 100% (white), 90,67% (beige), and 90,67% (beige).
Substitution of energy needs with renewable energy sources
Authors: Subagyo Subagyo , Moh. Yanuar J P , Bambang P N , Saleh A 
Published: December 2021

Abstract
The problem of global warming is a problem facing the world community. Since the Industrial Revolution’s birth, the use of energy from fuel oil (FF) has surged, and this causes an increase in Greenhouse Gases (GHGs) resulting from burning fuel. This GHG is the cause of the rise in the earth’s temperature, which is estimated to one day, the earth is not comfortable and even no longer habitable. The solution to the problem is reducing GHGs that can be done by saving fuel use, which is replaced with renewable energy sources (REs). RE sources are obtained from the Solar Power Plant (SPP), Wind Energy Power Plant (WEPP), Ocean Wave and Current Power Plant (OWPP and OCPP), Nuclear Power Plant (NPP), Biodiversification Power Plant (BPP), Hybrid Power Plant. Besides, REs can also increase the overall electrification in Indonesia, such as in East Nusa Tenggara. However, the electrification rate is still low in quality. According to the Republic of Indonesia Government Regulation 2014, the National Energy Policy mandates that energy mix from REs in 2025 is expected to reach 23%. This paper presents a literature review on new and renewable energy that can be considered early in their use.
Double Heterogeneity Neutronic Simulation of HTR-10 for First Criticality and Full Power Initial Core with TORT-TD code
Authors: Setyawan Daddy 
Published: December 2021

Abstract
In order to support the verification and validation of computational methods and codes for the safety assessment of pebble bed High-Temperature Gas-cooled Reactors (HTGRs), the calculation of first criticality and full power initial core of the high-temperature pebble bed reactor 10 MWt (HTR-10) has been defined as one of the problems specified for both code-to-code and code-to-experiment benchmarking with a focus on neutronics. HTR-10 Experimental facility serves as the source of information for the currently designed high-temperature gas-cooled nuclear reactor. It is also desired to verify the existing codes against the data obtained in the facility. In HTR-10, the core is filled with thousands of graphite and fuel pebbles. Fuel pebbles in the reactor consist of TRISO particles, which are embedded in the graphite matrix stochastically. The reactor core is also stochastically filled with pebbles. These two stochastic geometries comprise the so-called double heterogeneity of this type of reactor. In this paper, the first criticality and the power distribution in full power initial core calculations of HTR-10 are used to demonstrate treatment of this double heterogeneity using TORT-TD and Serpent for cross-section generation. HTR-10 has unique characteristics in terms of the randomness in geometry, as in all pebble bed reactors. In this technique, the core structure is modeled by TORT-TD, and Serpent is used to provide the cross-section in a double heterogeneity approach. Results obtained by TORT-TD calculations are compared with available data. It is observed that TORT-TD calculation yield sufficiently accurate results in terms of initial criticality and power distribution in full power initial core of the HTR-10 reactor.
Genetic diversity and species identity of the critically endangered Rote Island snake-necked turtle, Chelodina mccordi Rhodin, 1994
Authors: Devi N A , Eprilurahman R , Yudha D S , Raharjo S , As-Singkily M , Gunalen D , Arida E 
Published: December 2021

AbstractThe endemicChelodina mccordiis considered extinct in the wild; however, ex-situ populations are thriving and sampled for our genetic diversity assessment. We used three sequences resulting from blood and tissue samples of five individual turtles amplified for 650-bp cytochrome oxidase I (COI) fragment of the mitochondrial DNA. We analysed a total of 30 barcoding DNA sequences for phylogenetic relationships and genetic distances amongChelodina spp. Nucleotide diversity of eightC. mccordisamples is 0.007 ± 0.001 with a haplotype diversity of 0.893 ± 0.086. All these samples form a monophyletic clade that is sister to a clade of Australian and New Guinean long-necked turtles. Genetic distances calculated using Kimura 2-paramater model amongC. mccordisequences range between 0.2% and 1.5%, while a few others are without distance. The shortest genetic distance is between individuals from Rote Island, whereas the longest distance was found between individuals, each of which was derived from parental stocks originating in Rote and Timor islands. A genetic distance of 1.1% - 1.5% is likely to denote distinction at subspecies level. Results of this study could help in reintroducing captive individuals into their natural habitats. Thus, captive breeding programme of this species may help its conservation.
Mosses diversity from Simeulue Island, Sumatera, Indonesia
Authors: Windadri F I , Rosalina D , Keim A P 
Published: December 2021

Abstract
Simeulue is an oceanic islands located in the western coast of Sumatera, just offshore of the southwestern coast of Aceh Province, Indonesia. The diversity of mosses in the island was unknown. Unfortunately, the island was largely devastated by the 2004 tsunami, which also affected the flora of the island, including the moss flora. In order to conserve the present day mosses flora, the current study is conducted covering several types of habitats. 83 samples of mosses from 41 species have been collected and identified. Three species are apparently new records to both Simeulue and Sumatera; Hyophila javanica (Nees) Brid., Taxithelium kerianum (Broth.) M. Fleisch., and Taxithelium ramicola Broth. Neckeropsis gracilenta (Sande Lac.) M. Fleisch. is the dominant species.