bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Indole 3-Acetic Acid (IAA) and 6-Benzyl Amino Purine (BAP) on Nannochloropsis sp. culture growth
Authors: Ermavitalini D , Rahayu A E , Kurniawan H B , Prasetyo E N 
Published: February 2021

Abstract
One of the factors influencing the growth of Nannochloropsis sp. is the composition of culture media. The addition of growth regulators in the form of auxins and cytokines in culture media can increase the growth of microalgae. This study aims to examine the effect of IAA (auxin) and BAP (cytokinin) with various concentrations on biomass, chlorophyll content and carbohydrate content of Nannochloropsis sp. culture. Nannochloropsis sp. culture was treated with IAA and BAP in concentration variations each consisting of 0, 0.1, 1, 10 ppm with 3 replications. Data were analyzed with two way ANOVA at 95% confidence level and Tukey follow-up test. The results showed that the combination treatment of IAA and BAP did not affect the chlorophyll-a content of Nannochloropsis sp. culture, but it affected the biomass with the highest P16 (I10B10) of 3.65 g/L and carbohydrate content with the highest content in P4 (I10B0) of 0.30 mg/L. The highest chlorophyll-a content was found in P15(I1B10) of 5.574 mg/L, increased by 6 % compared to controls. Whereas the lowest chlorophyll-a content was found in P12(I10B1) of 1.563 mg/L, decreased by 70 % compared to the control.
Black soldier fly biowaste treatment and its recycle waste to produce chitosan
Authors: Pintowantoro S , Setiyorini Y , Aljauhari A M , Abdul F , Nurdiansah H 
Published: February 2021

Abstract
Recycling organic of house waste remains fairly limited especially in urban area with low-and middle-income. A novel approach is developing method to manage the organic waste conversion using larvae Black Soldier Fly (BSF). The advantage of this approach links to the green technology waste management which is no pollutant effect to the environment as well as increase the added value economically. The research project successfully presented organic house waste conversion into high protein of animal feeding source. From the 5 dol of larva BSF’s (approximately 17 gr), it was reduced organic waste ± 0.7 kg/day. Within 10 days, the larva BSFs of 17 dol was consumed organic waste ± 10 kg, with increase their weight to become approximately 10 kg. The larva BSF of 17 dol is potential as animal feeding source that contain a high of protein. Furthermore, the waste from BSF’s cycle life is potentially to convert into chitosan, due to contain of chitin. Chitosan was produced from the waste of larvae skin, pupa skin and insect imago death. In general, this organic waste management is offering to green organic waste management in the future.
Society willingness to pay towards application of renewable energy for household electricity needs in Kepulauan Seribu Regency
Authors: Anastasya A , Setadi H , Anggrahita H , Rizqihandari N 
Published: February 2021

Abstract
In the context of regional and local development, energy plays a very important role in all economic activities, so as in the small islands. The Kepulauan Seribu Regency already has an existing power system, but it needs to be improved. One of the available alternatives is by using solar power which is a type of renewable energy. Before the implementation of renewable energy, people participation in the use of such energy needs to be reviewed to obtain information about the conditions, needs, and attitudes of the local people. This research is a qualitative study using a human geography approach as its foundation. People's participation in this research is represented by the willingness to pay at the household scale on the islands with different functions in its connection with people's knowledge of renewable energy and the level of electricity consumption. The research results show that willingness to pay for types of households with businesses both in tourism and governmental islands are not influenced by knowledge of renewable energy, but rather by the amount of electricity consumption. On the other side, the knowledge affects the willingness to pay for the ordinary households on all islands. The deeper or more complete the knowledge, the more willing to pay.
Biogas production from co-digestion of water hyacinth, banana peel and water spinach wastes using a horizontal anaerobic digester
Authors: Soeprijanto S , Prajitno D H , Setiawan B , Maghfiro W , Rohmawati R 
Published: February 2021

Abstract
Biogas is an alternative energy source that can replace fossil fuels. The residue of agricultural products in the form of water hyacinth, fruit, and vegetable waste is a source of an organic material having large cellulose, lignocellulose, and lignin content so that it has the potential as a raw material for biogas production. This study proposed to evaluate the influence of the composition of the mixture of water hyacinth (WH), banana peel (BP) and water spinach (WS) wastes to biogas production using a horizontal anaerobic digester. At the initial experiment, the amount of cow dung mixed with water at a mass ratio of 1:1 was introduced to the horizontal anaerobic digester as a starter and was incubated for 5 days. Furthermore, the raw material of WH, BP, and WS wastes was crushed/ground at a size of 1 cm. Two kg of mixed water hyacinth, banana peel, and water spinach with a mass ratio of 100 : 0 : 0 (WH), 0 : 50 : 50 (BP-WS) and 50 : 25 : 25 (WH-BP-WS) was mixed with water to a volume of 8 L and was fed per day into the horizontal anaerobic digester. The biogas output from the anaerobic digester was collected in tubular plastic, and the volume of biogas was measured using the displacement of water. The results showed the highest average yield of biogas production was 0.3145 ± 0.1 l/gVS.day with cumulative biogas of 620.368 l, and the lowest one obtained by WH-BP-WS (0.2463 ± 0.1 l/gVS.day) with cumulative biogas of 402.012 l. While for mono digestion of WH, biogas yield was 0.260 ± 0.1 l/gVS.day with cumulative biogas of 518.768 l. The composition of biogas showed the use of BP-WS produced CH4 (71.23%), CO2 (25.79%), H2S (1.71%) and NH3 (0.39%); WH-BP-WS was CH4(71.97%), CO2 (25.91%), H2S (1.68%), NH3(0.38%); while for WH was CH4 (70.97%); CO2(26.77%), H2S (1.37%), NH3(0.61%), respectively.
Spatial arrangement in alley cropping of moringa and crops to optimize farming income on small Potteran Island, Sumenep Regency
Authors: Kustiyani  , Isdiantoni  , Ekawati I , Faisal M , Wati H D , Prasetyo E N 
Published: February 2021

Abstract
Research on alley cropping was conducted as it contributes to soil and water conservation, in addition to improves landscapes aesthetics. This cropping system was introduced to farmers in the small island of Poteran, Sumenep Regency. Farmers on this island generally have narrow land and limited capital, hence intensification of farming with small capital but maximum production and income is needed. In an effort to obtain a high income, it is necessary to find the optimal spatial arrangement between hedgerowspace and alley crops space. The spatial planning model reserached included three scenarios, i.e. two row, three row and four row moringa hedge crop by combining corn, peanut, and cassava as alley crops.To obtain optimal scenario, this research used alley cropping data from previous research conducted in Talango Village, Poteran Island, on an area of 0.16 ha. Subsequently, a linear program supported by a solver application in Microsoft Excel was used to determine the optimum spatial arrangement scenario. The results showed a two-row moringa scenario with cassava as alley crop produced the highest income with the lowest cost.
Business plan for the establishment of seaweed nursery in Poteran Island: a case study in fish farmers group
Authors: Isdiantoni  , Wahyuni P R , Wibisono A , Prasetyo E N 
Published: February 2021

Abstract
The potential of seaweed in Sumenep is quite vast; however, it is not followed by efforts to develop nursery support units. Even though the supply of edible seeds with "affordable" selling prices is crucial to the success of seaweed farming. To produce quality seaweed seeds technology input is needed, which affects the price of seedlings. The purpose of this study is to analyze the methods of determining the cost of seaweed nursery production and formulate alternative selling price policies that are appropriate for a seaweed nursery business. Data collection methods used were direct interviews, filling out questionnaires and observations within three months. Data analysis uses the costing method (HPP) by determining the full cost (full costing) and variable costs (variable costing). Use these two methods to compare the cost of production, which gives the lowest unit price. To determine the sales pricing policy that is suitable for seaweed nursery business, we use the cost-plus pricing method approach and the break-even analysis method. The results showed that the determination of the HPP of seaweed seeds using the Full Costing method and the Variable Costing method differed per kg, where the lowest HPP value was obtained from the Variable Costing method. The selling price policy for seaweed seeds produced is lower than the price of seaweed seedlings produced by farmers (market price).
Design model of linear generator on marine current power plant based on pneumatic system
Authors: Kusuma I R , Semin  , Zaman M B , Zubaydi A , Rafoth A , Cahyono T D 
Published: February 2021

Abstract
The concept of energy utilization is by utilizing the phenomenon of vortex vibration that occurs in a cylinder due to the flow of sea water currents. Although this phenomenon can lead to damage to the structure of the building and always avoided even attempted to be muffled as small as possible, but this vortex energy can be utilized to produce electrical energy that is environmentally friendly. This paper contains about the development of virtual prototype of linear generator on marine power plan with pneumatic implementation for prime mover. The development of virtual prototype of linear generator is done by using solid work. Then, control system of linear generator movement is based on pneumatic system. The virtual model simulate it in studio automation software then the result of the simulation is created graph of frequency so that can be analysed the pressure required to drive the actuator so that the linear generator produces 50 Hz frequency.
Development of safety for marine transportation in the Maratua Island
Authors: Zaman M B , Djatmiko E B , Nugroho S , Murdjito  , Busse W 
Published: February 2021

Abstract
Safety is a major issue in sea transportation. Improving safety is an important thing that should be conducted. It is to support the achievement of objectives in the fields of transportation, industry, business and so on. In this paper, the research area is Maratua Island. This island is one of the tourist islands in Indonesia. Safety of marine traffic should be developed in this island. It will support the development of the island as an area of marine tourism. The safety of sea transportation also very important to support the development of marine tourism on this island. This paper has established the FMEA methodology for getting RPN number on risk evaluation. Hazard identification is carried out in this study as a first step to determine the level of safety. Furthermore, risk analysis is carried out to determine the level of risk and useful for making decisions for improving safety.
Fire risk assessment on Floating Storage Regasification Unit (FSRU)
Authors: Baskoro D H , Artana K B , Dinariyana A A B 
Published: February 2021

Abstract
Floating Storage Regasification Unit (FSRU) is a variety of facilities that support Liquefied Natural Gas (LNG) supply chain activity. There are several potential fire hazards which could be harming human and cause death by the FSRU. This paper will discuss a fire risk assessment on the FSRU loading arms and gas export metering system. To begin, fire risk assessment is carrying out in several stages. The first step is to identify hazards using Hazard and Operability. Then, frequency analysis out of hazards events are complying by the Fault Tree Analysis and the Event Tree Analysis, these methods are to determine the type of potential hazards and to estimate frequencies of events. Henceforth, consequences analysis will be performing by fire modeling software. Finally, the result of the fire risk assessment can be carried out using risk mapping using standard f-N curve UK Offshore, if the risk mapping illustrates unacceptable condition, it is necessary to carry out a mitigation action using the Layers of Protection Analysis. Fire risk assessment indicates that the potential fire hazards which occur are jet fire, flash fire, and gas dispersion. Each hazard has leakage scenarios which are, small-bore (10-50 mm), medium bore (50-150 mm), and full bore (>150 mm). Thereupon, the result of consequence analysis indicates a various form of fire and expose areas which have an impact on marine crews. Based on the risk mapping, the results show that the fire risk assessment which has been carried out is in acceptable conditions and as low as reasonably practicable.
Health risk assessment and micro determination of trace elements content in Egyptian olive oil using ICP-OES
Authors: Yassin A A , Ghandour M A , Khalil M M 
Published: February 2021

Abstract
Inductively coupled plasma optical emission spectroscopy (ICP-OES) was applied to investigate multi elements (Zn, Cu, Pb and Cd) of Egyptian olive oil collected from different regions in Egypt. This process involves digestion using 10% nitric acid. The data showed that the concentration ranges were 0.6486-2.4166 μg/g, 0.0092-0.6919 μg/g, 0.0185-0.1026 μg/g and 0.0009-0.0186 μg/g for Zn, Cu, Pb and Cd, respectively. The results indicated that the highly toxic metals content did not exceed that recommended by FAO/WHO. The proposed method exhibited an excellent accuracy, adequate selectivity and high sensitivity. For the first time, this method described the direct determination of the previously mentioned elements and investigated the effect of both temperature and time for different samples in Egyptian olive oil.
Fractal Graphene Patch Antennas and the THz Communications Revolution
Authors: Blackledge J M , Boretti A , Rosa L , Castelletto S 
Published: February 2021

Abstract
Fractal antennas have and are continuing to receive attention in regard to the future of wireless communications. This is because of their wide- and multi-band capabilities, the opportunity of fractal geometries to drive multiple resonances, and, the ability to make smaller and lighter antennas with fewer components and radiative elements with higher gains. Small scale (i.e. on the micro- and nano-scale) and ultra high frequency (in the Terahertz or THz range) fractal antennas composed of Graphene have the potential to enhance wireless communications at a data rate that is unprecedented, i.e. ∼ 1012 bits per second. A Fractal Graphene antenna is a high-frequency tuneable antenna for radio communications in the THz spectrum, enabling unique applications such as wireless nano-networks. This is because (mono-layer) Graphene is a one-atom-thick two-dimensional allotrope of Carbon with the highest known electrical conductivity that is currently unavailable in any other material, including metals such as Gold and Silver. Thus, combining the properties of Graphene with the self-affine characteristics of a fractal at the micro- and nano-scale, provides the potential to revolutionise communications, at least in the near field (the order of a few metres) for low power systems. In this paper, we consider the basic physics and some of the principle mathematical models associated with the development of this new disruptive technology in order to provide a guide to those engaged in current and future research, a fractal Graphene antenna being an example of an advanced material for demanding applications. This includes some example simulations on the THz field patterns generated by a fractal patch antenna composed of Graphene whose conductivity is taken to scale with the inverse of the frequency according to a ‘Drude’ model. The approach to generating THz sources using Graphene is also explored based on Infrared laser pumping to induce a THz photo-current.
A Fuzzy BWM Method for Evaluating Supplier Selection Factors in a SME Paper Manufacturer
Authors: Kurniawan V R B , Puspitasari F H 
Published: February 2021

Abstract
In today’s competitive world, companies are required to increase productivity and produce high-quality products while managing their operational efficiency. This leads a firm to involve its performing suppliers by taking into account multiple factors. For small and medium-sized enterprises (SMEs), despite its importance, supplier selection is less considered. In this study, a case study for evaluating supplier selection factors in a small-medium scale paper manufacturer in Indonesia is demonstrated using the fuzzy best-worst method (fuzzy BWM). The BWM method that provides a structurally consistent factors comparison through the best and the worst criteria is extended using a fuzzy set to address the ambiguity from decision-makers’ judgement. The evaluation includes five supplier criteria: service, flexibility and delivery, reputation, quality, and purchasing cost. To determine the fuzzy criteria’ weights, the nonlinearly constrained optimization problem was introduced. The result indicated that the best and the worst criteria were respectively service and purchasing cost, while the service criterion was weakly crucial than quality. Besides, the Fuzzy BWM has also provided high consistency in the comparison. The optimal weights determined in this study can be applied for ranking suppliers for further attempts.
Designing Optimal Distribution Routes using a Vehicle Routing Problem (VRP) Model in a Logistics Service Provider
Authors: Puspitasari F H , Kurniawan V R B 
Published: February 2021

Abstract
In a running business, it is common for companies to face some challenges. One of them is related to supply chain performances, especially product distribution. Companies often have a problem determining the distribution route from the origin (warehouse) to the destination (consumer). This research will discuss the distribution route in a case study at a logistics service provider in Yogyakarta. The problem is that each courier does not have a fixed distribution route, causing couriers to overload and less effective when distributing goods to consumers. To solve this problem, we created a delivery zone for each courier done in previous studies using courier assignment optimization to minimize mileage. Furthermore, based on the zones that have been created, we determined the route using the classical vehicle routing problem (VRP) mathematical model to minimize travel time in this study. Based on the results obtained, couriers not only reduce mileage but also travel time, which makes this distribution route more optimal. Later, a vehicle routing problem with a time window can be carried out and compared with the current VRP for further research.
The Sidewalk Structuring Strategy As Iconic Pedestrian Case Study: Pedestrian’s Budi Luhur University - Jakarta
Authors: Kurniawan Dody , Yulianto Alvin 
Published: February 2021

Abstract
Over time, sidewalks do not only function as a space for circulation/movement of pedestrians. The sidewalk is expected to be able to improve the quality of the space where the sidewalk is located and can be an identity/icon for the surrounding environment. The existence of the sidewalks at the Budi Luhur University Campus has not been properly arranged so that it cannot yet be an identity/iconic for Budi Luhur University. From the formulation of the problem, research will be conducted with descriptive methods. Descriptive method is used to make a systematic, factual and accurate description, facts, properties and relationships between the phenomena investigated. This depiction is obtained through field observations, interviews and data from relevant agencies. The method of approach taken to achieve the stated goals is Identification of Design Norms; Identification of Comparative Study and Identification of Potential and Problems. The results of this study in the form of the concept of pavement arrangement as an iconic pedestrian.
Formulation and Physical Evaluation of Body Lotion Preparation of Kacip Fatimah (labisia pumila) Ethanolic Extracts as Antioxcidant
Authors: Kusumawati A H , Munawaroh A , Fikayuniar L 
Published: February 2021

Abstract
Kacip Fatimah (Labisia pumila) believed to have the antioxidant that played an important role in protecting against some diseases and delay the aging process. But, no research on kacip fatimah in his cosmetics formulation and efficacy to the skin. One form of cosmetic preparation is body lotion. Purpose: To determine the antioxidant activity of Kacip Fatimah ethanolic extract and to determine whether the concentration of Kacip Fatimah ethanolic extract affects the physical properties of the body lotion preparation. The body lotion is made in the form of an oil in water (m/a) and made in 4 formulas the concentration of the extract 0.5 %, 1%, and 2%. The physical test of body lotion extract of Labisia pumila is organoleptic, homogeneity, pH, viscosity, the spread, and the attaching, the results of testing in analysis using SPSS with Kruskal-Wallis and Mann-withney. The result showed that extract ethanol of Labisia pumila having strong antioxidant activity it is 87,752 ppm, and it can be concluded that variations concentration extract ethanol of Labisia pumila 0,5 %, 1%, 2 % affects the physical properties of body lotion. The greater concentration of extract, decrease the viscosity value with FI = 2863 cPs, FII = 1974 cPs, FIII = 1514 cPs, decrease the pH with FI = 6,72; FII = 6,37; FIII = 6,23, increase the spreadability with FI = 7 cm, FII = 7,93 cm, FIII = 8,03 cm, and decrease the attachability with FI = 1,33 sec, FII = 1,3 sec, and FIII = 1,01 sec.