bluuebunny/crossref_metadata_2025 huggingface dataset:
Preliminary sediment modeling at the confluence of the Mahakam and Karang Mumus River
Authors: Nur A , Hatta M P , Thaha M A , Suriamihardja D A
Published: February 2020

The sedimentation process can move slowly and continuously during sediment transportation is still ongoing from the mainland. The sediment evidence has been done by pairing the current bathymetric measurement of the previous data from the bathymetric map of the DISHIDROS of the Indonesian Navy 2011 in the confluence of the Mahakam and Karang Mumus River. Initially, the tidal measurements were carried out on 15-29 January 2019 while the bathymetry measurements were measured on 21-22 January 2019 during spring tide was over 800 m from upstream to downstream river confluences. Contour modeling measured using Software Surfer while the tidal is using the Admiralty method., to get discharge sediment performed contour coupling from both using AutoCAD software. The results of tidal analysis at the confluence of this river type Mixed Tide, Prevailing Semi Diurnal with MSL119 cm, HHWL 275 cm and LLWL-29 cm. Besides, the results of the sedimentation calculation showed an increase of 251,621.52 m3 in the tempo of 8 years from different Years of measurement. Most of the deposits occur on the opposite side of the Karang Mumus River, and this may be due to the small current velocity of the inner side of the Mahakam River that is curved towards the Karang Mumus River. Further research should also be modeled on current patterns and numerical modeling to ensure the morphological changes of the confluence of the present river.
The effect of wave reflection coefficient to the breaker parameter on OWEC breakwater
Authors: Puspita A I D , Pallu M S , Thaha M A , Maricar F
Published: February 2020

OWEC breakwater is a coastal structure with an integrated concept of the breakwater and overtopping wave energy converter. This breakwater WEC concept (OWEC breakwater) model has a reservoir at the rear of the breakwater peak. This reservoir serves to catch and collect overtopping waves that overflow through the top of the breakwater. The amount of overtopping discharge is influenced by many factors, one of them is the characteristics of the incoming wave, including the characteristics of the breaking wave on the surface of the structure, named the breaker parameter. The effect of wave reflection coefficient to the breaker parameter on OWEC (overtopping wave energy converter) breakwater is investigated experimentally as a preliminary study. The study is carried out in wave flume with regular waves. The OWEC breakwater model is simulated with slope variations and freeboard variations. The result showed that most of the breaker parameter types obtained are plunging (0.4 < 𝜉 < 2) and surging (𝜉 > 2), the result also showed that the higher the value of reflection coefficient, the higher the value of the breaker parameter.
Water security of river basins in West Java
Authors: Hatmoko W , Radhika  , Firmansyah R , Fathony A
Published: February 2020

West Jawa is a very important province in Indonesia. There are six river basins in West Jawa, namely: Ciliwung-Cisadane, Citarum, Cimanuk-Cisanggarung, Cisadea-Cibareno, Ciwulan-Cilaki, and Citanduy. The capital city of Jakarta is in the Ciliwung-Cisadane River basin, but the public water supply is supplied mostly from the Citarum River basin, which has three hydropower reservoirs and irrigates 240,000 hectares of rice field. Water security in West Jawa plays an important part in the sustainable development of the nation. This paper formulates and computes the water security for river basins in West Jawa. The method of constructing water security dimension is adapted from the Asian Water Development Outlook, having five dimensions of 1) household water security; 2) economic water security; 3) urban water security; 4) environmental water security; and 5) resilience to water-related disasters. At the river basin level, the water security indices are designed to be effective, simple, widely available, having no ambiguity, and directly related to the progress of infrastructure development. The water security results are presented as a radar diagram, and spatially in the thematic map. It is concluded that the overall water security score in West Java is “capable” (score of 3). The weakest security is Ciliwung-Cisadane and Citarum as “engaged” (score of 2). Both river basins are suffering from “hazardous” environmental water security.
Model management assessment of building waste material on impact cost during construction stage (case study in Makassar city)
Authors: Thoengsal J , Latief R U , Hamzah S , Rahim I R
Published: February 2020

The progress of multi-story building construction in Indonesia especially in developing regions such as Makassar City during the last ten years has experienced significant development. Where the proportion of overcast contributions due to the emergence of remaining material during building construction ranges (3-13.5)% which of course directly impacts the overall construction costs. The purpose of this study is to identify the remaining management factors of construction materials that are ideal for implementation by construction operators, conduct control assessments on the relationship of the effect of the application and potential management of the remaining construction materials to the impact of construction cost performance. The method used in this study was carried out by determining the population and sample number of building construction projects currently underway and a survey of the number of contractor representatives in Indonesia then collecting primary data in the form of distributing questionnaires to construction organizers, especially to experienced contractors, then subsequently. The expected results of this study are to obtain a management model concept for the remaining cost of building construction materials in the ideal construction stage that can be applied by the construction operators in this case to the implementing parties/contractors.
Practical production of lightweight concrete floor tiles
Authors: Faslih A , Kadir I , Umar M Z
Published: February 2020

The quality of concrete is influenced by fine aggregate. Lightweight concrete contains only fine aggregates. Tiles are one of lightweight concrete. The physical characteristics of fine aggregate need to be understood if you want to make a tile. For tiles to re-compete and attractive to use as home flooring, it is necessary to study to make light and aesthetic concrete tiles strong and aesthetic. This research is intended to make lightweight concrete based tiles. This research used the exploration method. The data begins with the selection of materials, work tools, and stages of manufacture. Information from various sources is captured and interpreted into a creative idea. The basic concept is done and developed pragmatically on the shape of the tile. The process of analysis is done qualitatively, so we get the form of tile. The tile shape is transformed from the parameters to the lightweight concrete-based tiles. This study concluded that the lightweight concrete-based tile material is made with the following stages: Preparation of work tools and work materials, basic coating, top-coating, printing, fresh tile removal, drying, polishing, as well as the application of resin oil.
Structural ductility of RBS on castellated beam subjected to cyclic loading
Authors: Aswad N H , Parung H , Irmawaty R , Amiruddin A A , Fakhruddin
Published: February 2020

RBS placement on a castellated beam on exterior connection structure with RBS position from column face refers to Prequalified Connection for Special and Intermediate Moment Frames for Seismic Application AISC 358-10, Article 5.8. The column beam test aims to evaluate structural ductility of the RBS on the castellated beam flange from the column face. The study was expected to explain the effect on column beam joints to provide input for planning earthquake-resistant building structures. The results show that the castellated test beam with RBS could withstand a load of 12.05 kN with a value of 4.2 structural ductilities.
Study and overview of the occupational health and safety management in the construction industry
Authors: Arifuddin R , Rahim I R , Aprianti E , Radiatullah A
Published: February 2020

The Occupational Health and Safety Management System is a part of the company’s risk management system for the creation of a safe, efficient and productive workplace. Construction Project in addition to paying attention to the timeliness, quality, and cost, also need to attention safety and health work. The regulation used as a reference for the implementation of OSH scope of the ministry of PUPR is No.05/PRT/M/2014. This research aims to analyze the influence of the policy of PUPR Regulation No.05/PRT/M/2014 on the improvement of OHS Management System performance in the construction project, and to formulate the improvement strategy that needs to be done in OHS Management System policy setting in the construction project. Data processing in this research is used smartPLS 2.0 program and Statistical Product and Service Solution version 22. Data analysis technique uses validity, reliability, normality, regression and descriptive analysis. The result of the regression analysis shows that every improvement of the policy variable will be followed by the improvement of OHS performance in the construction project. From the result of descriptive analysis, it is found that dominant elements have an effect and improvement strategy that can be done, that is the difference between OHS system and Safety Plan, the regulation concerning the potential of OHS hazard, and the importance of firmness to eliminate safety Plan document. The results of this study can be used by the government related to the policy improvement strategy so as to facilitate the related parties in implementing the OHS Management System in Construction Project.
Assessing effects of temporal changes in River water temperature on stratification in the Ariake Sea
Authors: Arifin A N , Yano S , Lando A T
Published: February 2020

The upward trend of river water temperature due to climate change has recently been confirmed. However, its effects on thermal stratification in coastal waters are not clear. Therefore, targeting the Ariake Sea – a semi-enclosed bay in the island of Kyushu, Japan – we continuously monitored river water temperature during and after August 2015 at the discharge observation stations of Class-A rivers that feed the sea, located in the non-tidal areas of the rivers and closest to the respective river mouths. Numerical simulations were performed on the density stratification in the Ariake Sea using the obtained hourly river water discharge and temperature data, to assess the effects of temporal changes in river water temperature on thermal stratification. It was shown that during a summer flood, river water temperature could influence the reproducibility of the development of thermal stratification depending on the river water temperature used, and the reproducibility of the base water temperature differed during the transition to the mixing period. Effects of river water temperature on the water temperature structure of the sea were indicated.
Development of eco-friendly paving block incorporating co-burning palm oil-processed tea waste ash
Authors: Caronge M A , Lando A T , Djamaluddin I , Tjaronge M W , Runtulalo D
Published: February 2020

The present study explores the development of eco-friendly paving block incorporating co-burning palm oil-processed tea waste ash (POPTA). POPTA was collected from the local tea processing plants and used to manufacture paving block at a local paving block industry with dosages ranging from 10 to 60% by cement weight. The properties of the paving block were investigated, including bulk density and compressive strength. Results show that the POPTA produced a lighter weight paving block. It also decreased the compressive strength of the paving block. Incorporating up to 40% of POPTA as cement replacement satisfied the minimum standard compressive strength requirements for the Class D paving block according to SNI-03-0691-1996. Utilization of POPTA in production paving block could mitigate the landfilling of this by-product and lead to the development of eco-friendly and economical construction materials.
Eco-drainage system planning with SWMM model: a case study of Sawah Liat drainage, Kuranji watershed in Padang City, Indonesia
Authors: Junaidi A , Putra H , Istijono B , Nurhamidah N , Utama M
Published: February 2020

Sawah Liat drainage is one area of drainage that the flow of water discharged into the Kuranji River in Padang City. It is a very vulnerable area to the flooding. Flooding was caused by high rainfall, land-use change, and river flooding. This area does not yet have a drainage network system. This research is to plan a new drainage system using the eco-drainage concept of adding a retention pond in the drainage network system. EPA-SWMM model was used to simulate the planned drainage network model and assisted with Global Mapper and ArcGIS for spatial analysis. Six simulation models are performed by combining two models of the drainage network, two land cover models, and two models of rainfall. The results showed that the drainage network models with retention ponds are more effective against controlling flooding. With simulation using a 5-year rainfall return period, there was no flood. For simulations using rainfall data on March 22, 2016, the depth of flooding could be decreasing from 0.2 m to 0.9 m. The retention pond can reduce the 5-year flood volume of 120,200 m3 or 59% of the total 203,710 m3
Effectivity of constructed wetland using Typha angustifolia in analyzing the decrease of heavy metal (Fe) in acid mine drainage
Authors: Zubair A , Abdullah N O , Ibrahim R , Rachma A R D
Published: February 2020

Coal mining in Indonesia mostly done by open mining. The most severe problem in open mining activities is Acid Mine Drainage (AMD) production. Acid mine drainage contains heavy metal (Fe) that will impact now and future living creatures. One of the increasing of acid mine water treatment after the mining process is by using a constructed wetland method. This research aims to analyze constructed wetland effectiveness with rate variation, the number of plants, and material composition (compost, gravel, and limestone). The aims are also to examine local plant of Tifa (Typha angustifolia) ability on decreasing heavy metal (Fe) of acid mine drainage according to Kaltim Regulation Number 02 the year 2011 on water quality standard of coal industries. The study used the method of constructed wetland using a surface flow system, and a vertical ascending flow operated continuously using the elevation. The built wetlands design uses an intermediate bulk container tank with 100 cm x 100 cm x 100 x cm reactor dimension. The result shows that the decrease of the efficiency acid mine water on surface flow constructed wetland for Fe as follows in a row 70.88% (reactor 4), 57.88% (reactor 2). The best Fe metal content absorption is obtained on plant amount 15 treatment with 0.001 L/s rate, with iron content absorption 3294 ppm (40.11%). Fe metal content decrease on compost is obtained to 20% compost treatment with 0.001 L/s rate, with iron content decrease 8728 ppm (89.23%).
Effects of change of density stratification due to Isahaya Sea-Dyke on the fate of anoxic water in the Ariake Sea
Authors: Tadokoro M , Yano S , Peizhi Q , Orrheim L
Published: February 2020

In this study, we aim to investigate the possibility that the construction of the Isahaya Sea-Dyke significantly causes anoxic water development in the bottom layer in the Ariake Sea, Japan. We numerically compared the vertical distribution of dissolved oxygen (DO) in the water column between two cases with the dyke and without it. As a result of this research, the followings are clarified: 1) DO totally decreased in Isahaya Bay due to construction of Isahaya Sea-Dyke; 2) The effect is relatively small during neap tide, but is larger in spring tide; and 3) The effect is not shown in the main body of the Ariake Sea.
Performance evaluation of sewage treatment plants in the building of Gowa Engineering campus
Authors: Mangarengi N A P , Selintung M , Zubair A , Mujahid N
Published: February 2020

One of the severe problems caused by anthropogenic activities is wastewater that is not appropriately treated. Faculty of Engineering Campus in Gowa, for instance, is one of the areas in Makassar City that has implemented an integrated sanitation system, namely STP (Sewage Treatment Plants). The type of research used in this study is quantitative analysis based on the evaluation. The research aims to evaluate the efficiency of the STP in the Engineering Faculty of Gowa by testing some parameters such as Total Suspended Solids (TSS), Biological Oxygen Demand (BOD), pH, Chemical Oxygen Demand (COD), oil and Grease from inlet and outlet samples. The purpose of the study is also comparing the evaluation results with the standard of Governor of South Sulawesi no. 69 of 2010 regarding quality standards and criteria for environmental damage in Makassar. Based on the evaluation results, all the parameters of STP in the Centre of Scientific (CSA) building, Classroom, Architecture, Civil, Naval, and Geology have met the quality standards. However, only in the COT building, some parameters do not meet the quality standard, which is TSS, BOD, and COD. It shows that the performance of STP in the faculty of engineering campus has worked well but not ideal.
The capability of green open space in absorbing carbon monoxide and carbon dioxide emissions in Balai Kota Makassar
Authors: Aly S H , Zakaria R , Kondorura C F
Published: February 2020

The economic growth will increase the transportation sectors roles in supporting the achievement of development goals. But transportation activities have negatives impact, where one of the negative impact of transportation activities is the high levels of pollutants due to emissions or release of smoke from motor vehicles. This study aims to determine the capability of green open space that exists, especially in the ability of trees and shrubs in absorbing carbon monoxide and carbon dioxide emissions generated by motor vehicles operating in Balai Kota Makassar. The research is qualitative. All data required for the analysis of the research are primary data or data obtained directly in the field. Primary data in this research are data obtained by counting the number of vehicles and the area cover by vegetation canopy. In this research, zonation system is applied because each area has different green open space requirement based on the emission load generated by motor vehicles passing in the area so that the research location is divided into 4 zones. To calculate the vehicle’s emission, it applies the equation of emission strength, and to calculate the emission absorption by vegetation is use vegetations area covers. The results showed in zones 1, zone 2 and zone 3, green open space existing already can absorb 100% carbon dioxide emissions and carbon monoxide. But in zone 4, green open space existing cannot absorb 100% carbon dioxide emissions and carbon monoxide.
Utilization of reject material in raw grinding mill unit as industrial wastewater adsorbent
Authors: Husain H , Abdullah N O
Published: February 2020

The technology of handling industrial wastewater adopted by the industry is quite expensive with high costs in its operation, so that wastewater treatment technology that is cheap and easy to adopt and under strict environmental regulations is an important thing to consider. Innovative adsorption-based technology developed using industrial waste and agricultural waste offers an easy and economical solution for polluted environments. Raw grinding mill as one part of the cement industry production equipment serves to grind or soften cement raw material, some waste material which is known as reject material during the process and has not been used optimally. This research aims to determine the effect of reject material as an adsorbent on decreasing metal content and pH of industrial wastewater. The method used in processing, namely the wastewater sample, is put into a reservoir (tub I), then flowed continuously into tub II, which is filled with reject material as an adsorbent. The sampling technique was carried out after the wastewater flowed from tub II and then collected in a storage container and ready to be analyzed for heavy metal content and pH of wastewater in the laboratory. The results of the research showed that reject material of Raw Grinding Mill as an adsorbent of PT. Bosowa cement can reduce metal material PO4 = 94.63%, NO3 = 81.82%, NH3 = 22.41%, As = 76.67%, Zn = 73.23%, Ni = 100%, Ag = 60%.
Effects of probiotic supplementation in rations containing leubiem fish waste (Chanthidermis maculatus) on the performance of local ducks
Authors: Daud M , Yaman M A , Zulfan  , Asril
Published: February 2020

The aim of this study is to determine the effect of probiotic supplementation in rations containing leubiem fish waste (Chanthidermis Maculatus) on the performance of local duck. The study used 192 female local ducks 8-20 weeks old grower phase. The ducks were allocated into 4 treatments and 4 replications (12 ducks/pen). The female local ducks was fed ration contained 18% crude protein and 2700 kcal/kg metabolizable energy. The experiment used completely randomized design with 4 treatment rations: P1 (basal diet/control); P2 (probiotic supplementation 0,5% in rations containing 10% leubiem fish skin flour); P3 (probiotic supplementation 1% in rations containing 10% leubiem fish head flour); P4 (probiotic supplementation 1,5% in rations containing 10% leubiem fish bone flour). The observed variables were: feed consumption, body weight gain, final body weight, feed conversion, and mortality of local duck. Data were analiyzed by one-way analysis of variance then continued with Duncan test. The results showed that of probiotic supplementation in rations containing leubiem fish waste gave a positive response to the performance of female local duck grower phase. Probiotic supplementation in rations containing leubiem fish waste (skin flour, head and bone) significantly affect (P<0,05) feed consumption, body weight gain, final body weight, and ration conversion, but no significant affect on mortality local duck grower phase. It was concluded that of probiotic supplementation 1% in rations containing leubiem fish waste (skin flour 10%) could to increase body weight gain, final body weight and be able to reduce local duck mortality.

A post-publication change was made to this article on 11 Mar 2020 to correct the conference title in the PDF header.
Development agriculture potential areas based on sharia perspective (case study of Lengkong Jaya village, regency of Tasikmalaya)
Authors: Majiidah A , Nadaa F , Putri A , Karebet W
Published: February 2020

No matter how high source potency of a region is, the capitalistic development approach always gives construction residue which later called a burden social prosperity problem. Poverty and a massive number of immoralities cannot be neglected. This condition seems gradually happens. Lengkong Jaya Village, the object of this research is no exception. With 500.25 ha of land, this village is rich in natural sources and has potential to be a well-developed village as well as a model village. Unfortunately, there are still 513 poor families by the percentage of 30% of 6,160 inhabitants total amount population (2019). This research is aiming to provide some recommendations to develop some agricultural potentials in correlation with the sharia approach. The research was carried out using the SWOT methodology approach (qualitative analysis). Involving 161 expert respondents from all RWs (8 RWs). Based on the data that has been processed, it is known that Lengkong Jaya Village is in quadrant A, meaning that there is a high correlation between strengths and opportunities (S-O) of the village. The strategic recommendation is Comparative Advantage, while the functional recommendations are the derivative strategies, called Core Competence. By this recommendation, stakeholders of the village, especially governments are advised to utilize the Comparative Advantage of the village. The recommendation is very important to attain the hopes of Lengkong Jaya Village stakeholders, specifically being a Blessing Agro-Industry Village.

A post-publication change was made to this article on 11 Mar 2020 to correct the conference title in the PDF header.
Improvement of cinnamon (C. burmanii) sorting and grading through influencing factors
Authors: Santosa  , Hadiguna R A , Syaputra A , Makky M
Published: February 2020

Labour productivity influenced by work-in-process, labour skills, machineries and working environment. This study identified factors affecting the labour during sorting and grading of cinnamon. Five factors used as independent variables, namely working motivation (X1), working environment (X2), salary (X3), age (X4) and workload (X5). Factors then correlated with labour performance (Y) as dependent variable. Samples were randomly selected from respondents, of the Rasdi Fo & Co. Personal characterization calculated from employee’s years of service. Results then grouped according to the labour experienced, and statistical analyses were set according to F test, t test, power function, and influence factors. These methods used to analyse the working environment, in correlation to the employee performance, room temperature, humidity, lighting, and noise levels. From the results, X2, X3, X4 and X5 had no significant effect, while Y can be described as a function of 2,06(X10.326)(X20.016)(X30.170)(X40.479)(X5−0.172). Maximum room temperature recorded at 38.4°C, while minimum temperature recorded at 29.3°C, lower than the ideal level. Maximum and minimum humidity (RH) was 91.3 % and 59.2 %, respectively. The RH in working environment exceed normal level. The noise level recorded between 48.8 dBA and 78.4 dBA, which classified as normal without ear protection.
Evaluation of agro-industrial by products as potential local feed for ruminant animals: volatile fatty acid and NH3 concentration, gas production and methane emission
Authors: Samadi  , Pratama S M , Wajizah S , Jayanegara A
Published: February 2020

Due to high cost of conventional feed, the use of agro-industrial by products has been widely known as alternative for animal feed. The aims of this experiment is to get information about the potency of agro-industrial by product in Aceh that can be utilized as feed for ruminant animals based on volatile fatty acid concentration, gas production and methane emission. Eight kinds of agro-industrial by product in Aceh from three different location products (sago residues, coconut meal, soybean-ketchup by product, coffee pulp, cacao pod, sago tree, corncob, and rice brand) were used in this study. Prior to analyses, all samples were dehydrated at the temperature of 60°C for 24 h, then crushed to pass a 1 mm sieve. Crushed samples were analysed to determine volatile fatty acid concentration, gas production and methane emission. Incubation was carried out in water bath with three replicates for 48 h with the temperature of 39°C. The production of gas was collected and periodically documented at 2, 4, 6, 8, 12, 24, 36 and 48 h after incubation by using a syiringe. The VFA production from agro-industrial by products in this study was not significantly different (P>0.05) from one by-products and others from 83±2.26 mmol/l for cacao pod to 123 ±16.1 mmol/l for coffee pulp. The production of NH3 was with the range of 5.72 mmol/l to 15.71 mmol/l for for sago trees and coconut meal respectively. Total gas production from agro-industrial by products was 69.90 ml g/DM to 210.40 ml g/DM with methane gas production in the range of 33,88 – 35.18 ml/g DM after agro-industrial by products were incubated for 48 h. In conclusion, based on the fermentation parameters in this study, local agro-industrial by products in Aceh Province can be utilized as sources of alternative animal feed as replacement of conventional. Based on fermentation parameters measured in this study (VFA, NH3, gas production total) were still in optimal range for fermentation process in animal production
Analysis of the level of interest in the entrepreneurship for students in the Faculty of Agriculture, Universitas Syiah Kuala
Authors: Rahmaddiansyah  , Mujiburrahmad  , Zakiah  , Afridila S , Alansa F D
Published: February 2020

Now looking for jobs is not the right solution or alternative after taking education because the number of offers is not proportional to the number of requests available. Entrepreneurship is an excellent alternative to overcome the limitations of employment. The purpose of this study is to investigate the level of interest in student entrepreneurship, compare the level of interest, and investigate the relationship of knowledge, potential, and environment to the interests of entrepreneurship. The population in this study was 1,089 students from the Faculty of Agriculture, Syiah Kuala University. A total of respondents are 30% of the population. Data is collected using a questionnaire (online survey). The results of this study indicate that the level of student interest in entrepreneurship is still low compared to being an employee, 36% choose to become entrepreneurs, and 64% choose to become employees. There are significant differences in the level of interest between study programs. Study programs based on agriculture are more likely to be entrepreneurial in agriculture, while study programs based on business and technology are more interested in doing business outside of agriculture. Knowledge, potential, and a supportive environment for entrepreneurship in agriculture are not correlated with student’s interest in becoming agricultural entrepreneurs. Student’s view becoming more secure employees and businesses outside agriculture is more promising.
Evaluation of the critical level of mangrove ecosystems using Spatial Technology in East Aceh Coastal Areas
Authors: Karim A , Fazlina Y D , Syakur  , Fathanah N
Published: February 2020

Coastal zones are areas that are vulnerable to ecological damage. One type of ecosystem that is vulnerable to damage in coastal zones is mangroves. The coastal area of East Aceh is one of the areas where the existence of mangrove ecosystems has a high level of criticality. The level of criticality of mangroves in the area is caused by various factors such as exploitation of natural resources, physical development such as residential areas, and conversion of land to other designation areas without considering to the sustainability of mangrove ecosystems. By utilization of Landsat 8 and Bing Map Imagery satellite image data using the concept of geographic information systems, the extent of mangrove forest and its critical level can be inventoried. Determination of the critical level of mangrove forests was carried out by referring to the mangrove inventory guidelines issued by the Indonesian Ministry of Forestry in 2005. The results of data processing showed that the critical level of mangrove forests reached 4,200.02 hectares in severely damaged conditions, 7,286.93 hectares in damaged condition, and 9.704, 01 hectares are not damaged. Based on these results, forest management efforts are needed through the method of rehabilitating mangrove forests toimprove the condition of heavily damaged mangrove forests.
Evaluation of selected soybean mutant of Kipas Putih M4 at the experimental research station faculty of Agriculture Universitas Syiah Kuala
Authors: Zuyasna  , Zuraida  , Risliawati A , Gunawan
Published: February 2020

An evaluation of 4th generation (M4) of Kipas Putih soybean mutants was done to obtain a high potential production line. The research was conducted at Agriculture Faculty of Syiah Kuala University, Darussalam - Banda Aceh. Kipas Putih soybean variety that have not been irradiated was used as a control. Evaluation was done on agronomic character and yield. The results showed that mutants with high potential for production were B4, B15 and B22 mutants. The best mutant is B15 that have increased in the seed size about of 19,19 % from the parent – Kipas Putih variety (B0).
The system dynamics modeling of Gayo arabica coffee industry supply chain management
Authors: Hakim L , Deli A , Zulkarnain
Published: February 2020

This study aims to design a model of supply chain management of Gayo Arabica coffee industry in an effort to increase value added and profit for smallholder plantation and company. The method applied to achieve this goal is a system dynamics methodology which is a modeling approach based on systemic thinking and uses perspectives based on information feedback and delay to understand the complex behavior dynamics of physical, biological and social systems, which occur in the supply chain management. The results showed that through the development of a hybrid production system and quality engineering in supply chain management of the Gayo Arabica coffee industry has been able to respond to the dynamics of consumer order. Scenario I and II made changes to model parameters which resulted in an increase in business profit obtained by company, while smallholder plantations did not experience changes in the profits of their business. Scenario III carried out a structural change model that was divided into two parts, namely the Scenario IIIA which applied institutional innovation between governance of public plantation relations with agro-industrial cooperatives in the form of coffee bean delivery system, while Scenario IIIB applied the governance of public plantation relations with agroindustry cooperatives in the form of transaction systems coffee bean. The results of Scenario IIIA are able to increase the value added and benefit obtained by smallholder plantation and be able to increase company profits and maintain customer satisfaction simultaneously. Scenario IIIB results are only able to increase company profits and maintain customer satisfaction, while increasing profits and value added of smallholder plantations do not occur.

A post-publication change was made to this article on 11 Mar 2020 to correct the conference title in the PDF header.
Effects of Gambir leaves extract (Uncaria gambir Roxb.) in preventing the aging process inducted D-galactose on pancreas mice
Authors: Fitri S , Anggraini D R , Ichwan M
Published: February 2020

Increasing level of reactive oxygen species (ROS) can damage the cell membrane and composition of DNA, leading to organ degeneration. Pancreas is among the organs that is sensitive to oxidative damage. Consumption of flavonoid-rich stuffs such as herbs, fruits and vegetables are believed to strengthen antioxidant capacity in the body in neutralizing free radicals. Gambir leaves have been used traditionally as remedies of various diseases. The most prominent active compounds in Gambir is flavonoid catechin which belongs to flavan-3-ols group. D-galactose is monosaccharide thatin high concentration can increase ROS generationand induce senescence in animal models. In this study, we aimed to observe the effect of Gambir leaves extract (GLE) in preventing ROS production and pancreas damage in galactose-induced mice model. Twenty-four female mice were divided into 4 groups amd injectedwith D-galactose 150 mg/kgBW intraperitoneally for 6 weeks. Three groups were supplemented with GLE 100; 200 and 400 mg/kgBW, respectively. Serum MDA, blood glucose and pancreas histopatology were analyzed. There is no significant difference among GLE-treated groups compared to control in the level of serum MDA (p=0,286), blood glucose fasting (p=0,051) and random (p=0,626), and pancreas histopathology: area of Langerhans islet (p=0,589) and perimeter of Langerhans islet (p=0,634). We did not found the histological damage in panreas. Interestingly, we found a trend increase in area, perimeter and cell number in Langerhans islet. Our data suggested a potential effect of GLE in increasing the growth of panreatic cells. Further study is necessary to elucidate the regenerative effect of GLE in damage pancreas such as streptozotocin-induced diabetes model.
Supply chain risk analysis of tempeh using modified failure mode and effects analysis
Authors: Saroyo P , Aulia F N
Published: February 2020

Risks and their associated sources of risks in the supply chain of tempeh vary either due to improper raw material handling, inappropriate production processes or improper product handling by salespersons. This research aims to identify the risks that occur in the tempeh supply chain at XYZ Company, conduct analysis and evaluate risks and provide a proposed risk mitigation strategy. Primary data were obtained through direct observation in the field and in-depth interviews of the actors involved in the tempeh supply chain. Identification of risks that occurred in the tempeh supply chain was conducted using SCOR approach. Risks were identified based on supply chain activities that occurred in the Plan, Source, Make, Deliver, Return business processes. Risk analysis was carried out using Modified Failure Mode and Effect Analysis (FMEA) approach. The results showed that there are eleven risk events that must be taken into consideration for preventive program. The risk events are distributed in Plan business process (3), Source (1), Make (4), Deliver (2) and Return (1). The preventive program for avoiding the risk events occurring should give precedence on controlling Fluctuating demand (A1), Suddenorder (A4), Indiscipline of workers (A14) and Close down of consumer’s business (A18).
Consumer needs and consumer satisfaction in the creation of co-working space café business concept
Authors: Fauzia A , Suharno  , Guritno A D
Published: February 2020

The co-working space café business grew faster in the last decade. Students and freelancers use these cafés to do their daily activities. This type of café provides food, beverages, and comfortable place to work. This new demand encourages business owners to think further. The growth of cafés triggered by new working style demanding shared work facilities and networking access. Visitors can enjoy meal and drinks while working on their assignments independently or within their work team. Information on consumer needs as well as satisfaction are not clearly formulated yet. The purpose of this research to analyse the important attributes that customers need and attributes that can satisfy them when they use co-working space café. The data were collected using questionnaires from 100 respondents in 5 locations of co-working space cafés located in Yogyakarta. The results show that the required attributes by the consumer are the availability of electrical plugs, indoor air conditioning, varied and tasty food, Google maps access, availability of parking lots for motorcycles and cars, friendly and informative employees, and ease of booking. Attributes that can satisfy consumer are the atmosphere and interior aesthetics, availability of indoor and outdoor space, the availability of promotion programs, and flexibility of payment.
Analysis of biogas production made from oil palm empty fruit bunches (OPEFB) using anaerobic batch reactor (ABR)
Authors: Wagiman  , Ainuri M , Kurniawan M P , Astari A D , Setiyawan I T B
Published: February 2020

This research aims to analyse the biogas production made from oil palm empty fruit bunches (OPEFB) using anaerobic batch reactor (ABR). In this study three factors were used and each had three levels. The first factor is source of microorganism (liquid waste and sludge of Palm Oil Mill Effluent, and P-Biored), the second factor is preliminary treatment using NaOH (concentrations of 0%, 1%, and 8%) and the third factor is total solids (10%, 25%, and 40 %). The research parameters included the volume of biogas, levels of methane gas, and reduced organic matter. The results of this study indicate that the best factor and level are preliminary treatment with 0% NaOH, source of microorganism from liquid waste of Palm Oil Mill Effluent and using 10% total solids which produce as much as 2457 ml biogas with methane yield of 929.01 ml/300 gr OPEFB and reduced organic matter of 138.25 gr/300 gr OPEFB.
The potential of arabica coffee grounds nanoparticles as an active compound of pharmaceutical preparations
Authors: Nurman S , Yulia R , Irmayanti  , Noor E , Sunarti T C
Published: February 2020

Arabica coffee (Coffea arabica L.) grounds are kind of solid waste produced from filtering process containing many bioactive components and good for health. Nanoparticle technology can be used to produce nanoscale particles without separating the active compounds contained the rein. The aim of this study is to determine the potential of Arabica coffee grounds nanoparticles as active compounds to be used in pharmaceutical preparations. The research procedure was begun with collect the Arabica coffee grounds which was then processed into nanoparticles using the ball milling and ultrasonication technique. The nanoparticles were characterized using some techniques, namely particle size analysis using PSA (Particle Size Analyzer), phytochemical screening, total phenolics, pH, particle morphology using SEM (Scanning Electron Microscopy) and particle structure using FT-IR (Fourier Transform Infrared Spectroscopy). The results showed that Arabica coffee grounds nanoparticles has a particle size of 396.0 nm with a polydispersity index of 0.254, solubility of 70.680% and pH 5.33, the positive Arabica coffee grounds nanoparticles containing secondary metabolites of alkaloids, saponins and phenolics with total phenolics 1246.90 μgGAE/g. Morphology of Arabica coffee grounds nanoparticles was in irregular granules form with an asymmetrical size and has active functional groups such as OH, NH, CH alkane, C≡N, C=O carboxylic acid, -C=C-, CO, and CC. It can be concluded that Arabica coffee grounds nanoparticles were potentially can be used as active compounds in various pharmaceutical preparations.
Phytochemical test fraction N-hexane allelopathy goat weed extracts (Ageratum conyzoides L.) on the growth of thorn spinach (Amarantus spinosus L.)
Authors: Nandi M V P , Hasanuddin  , Hafsah S
Published: February 2020

Plants release allelopathy compounds that can inhibit the growth of other plants so that it has the potential as a vegetable herbicide. One of the allelopathy characters that can be used in determining the criteria as a basis for plant biocides is allelopathy that specifically inhibits the growth of target and non-target plants. The source of allelopathy used in this study was goat weed (A. conyzoides) using N-hexane on the growth of thorn spinach (A. spinosus). The research has been carried out at Weed Laboratory, Agrotechnology Study Program, Faculty of Agriculture, Syiah Kuala University. Further analysis and test activities were carried out at the Laboratory of Agriculture and Food Analysis Laboratory of the Faculty of Agriculture, Syiah Kuala University. The first factor was the type of sub-fraction of weed extract consisting of 4 levels: control, sub-fraction A, sub-fraction B and sub-fraction C, and the second factor is the extract of goat weed consisting of 3 levels: 5%, 10% and 15%. The results showed that the use of various types of A. conyzoides extracts with various levels significantly affected the stem diameter; shoot dry weight and root dry weight of A. spinous on 7 DAT (days after treatment) up to 28 DAT. Sub-fraction types A and B can inhibit the growth of A. spinous.

A post-publication change was made to this article on 11 Mar 2020 to correct the conference title in the PDF header.
Contributing factors to the empowerment of fishpond farmer of post Tsunami Aceh
Authors: Zikri I , Agussabti  , Safrida  , Susanti E , Thursina C U
Published: February 2020

The 2004 Indian Ocean earthquake and tsunami have significant implication to a destructive damage community fish farming in Aceh. The recovery has done during the rehabilitation and reconstruction process. This study aims to identify the degree of fishpond farmer’s empowerment of post-tsunami and its contributing factors. The study employs quantitative and qualitative approaches through a questionnaire survey and interview with 51 respondents. Data analysis used descriptive analysis to measure empowerment degree and multiple linear regression analysis to identify determinant factors. The study finds that about half of the respondents are at a moderate level of empowerment degree, more than a quarter is at a high level, and the rest is low. Statistically shows that social network, motivation, innovativeness, resources availability, and characteristics of the economy have a positive correlation and significant to empowerment degree of the fishpond farmer. Meanwhile, information tools and extension mechanism are not significant. Therefore, the role of extension and initiatives are necessary to encourage and enhance the quality of empowerment by enabling and improving the capacity of the agent of change.
The potential of curry leaves (Muraya koenigii) as Enterobacteriaceae inhibitor on fresh meat
Authors: Hanum Z , Yurliasni  , Fitri CA , Maulina Z , Herawati  , Akmal F
Published: February 2020

The aim of this study was to determine the potential of curry leaves powder as Enterobacteriaceae inhibitor on fresh meat. Fresh meat was obtained from Lambaro Traditional Market in Banda Aceh. Curry leaves powder was produced by heating at 50°C for 8 hours then ground through 3 mesh. The inhibitor test using agar diffusion method. Parameters observed were total plate count (TPC) and total of Escherichia coli and Salmonella counts in fresh meat. Completely Randomized Design Factorial with two factorials was used. The first factor was concentration of curry leaves powder (0%, 25% dan 50%). The second factor was duration of storage (0 day, 2 days, 4 days and 6 days). Data obtained were analyzed by Analysis of variance (ANOVA) followed by Duncan’s test. The result showed that addition of 25% and 50% curry leaves powder were able to inhibit E.coli. Addition of 50% curry leaves powder was effective to inhibit E.coli and Salmonella sp. The inhibition occurred in E.coli and Salmonella sp. proves that curry leaves contain active compounds acting as antibacterial.
The effect of feeding with the addition of activated charcoal on feed conversion and survival of Juvenile Giant Trevally (Caranxignobilis)
Authors: Firdus  , Muhammadar  , Samadi  , Ali S M , Mellisa S , Boihaqi  , Intan A , Nasir M
Published: February 2020

The study of the effect of feeding with the addition of activated charcoal on feed conversion ratio and survival of juvenile Giant Trevally (Caranxignobilis) was carried out in May to August 2018. This study consisted of 5 treatments and 4 replications. Feed is treated with the addition of activated charcoal of different types, namely coconut shell activated charcoal, mangrove wood activated charcoal, rice husk activated charcoal, and palm shell activated charcoal. Addition of activated charcoal in feed at each treatment as much as 2%. Feed was given twice a day in at-satiation for 42 days. The results showed that feeding with the addition of activated rice charcoal had a very good effect on feed conversion. There was no significant difference between the treatments of activated charcoal on the survival of the juvenile Giant Trevally. The survival rate was around 88.33% - 96.67%.