bluuebunny/crossref_metadata_2025 huggingface dataset:
Flow description of gas well in basement granite reservoir from well test analysis
Authors: Oetomo H K , Sitaresmi R , Laksana D P
Published: December 2019

A sweet gas exploration well, penetrating 3286 feet thickness of Granite Basement with 200 feet thickness of extensive fracture was tested. Initial step was to study all geological and petrophysical aspects of reservoir and well. These data were used to obtain the sense of reservoir shape model and its fracture flow behaviour. Interpreting the log gives the presents of partial fracture and open fracture, which are shown in the early time region as a fracture dominated flow and very small wellbore storage effect. The bilinear flow before middle time region and followed by two porosity fracture model at middle time region are shown afterward. Constant pressure circle boundary is shown in the late time period. In summarized, the well flow model is in infinite acting conductivity with two porosity pseudo steady state reservoir model and constant pressure circle boundary. The permeability is 1.45 mD, with -0.52 skin and 1962 Psia reservoir pressure; meanwhile the fracture coefficient is 50 mD-ft, storativity is 0.51, and interporosity flow coefficient is 4.38x10-6 mD-ft. All well and reservoir data pertaining well test is very important for getting a reliable well test interpretation result; to get better understanding reservoir flow behaviour; in this case the reservoir is tight with expected better reservoir outside circle boundary.
Stabilization of the quality and anthocyanin in strawberry puree during storage
Authors: Mangku I G P , Rudianta I N
Published: December 2019

During processing and storage of strawberry products like puree were often found some problems such as loss or change of red color anthocyanin, the formation of brown pigment and loss of ascorbic acid. The purpose of this research is to determine the best of precise dextrin concentration to stabilization of red color anthocyanin pigment and the quality during storage at temperature 10±2°C for 30 days. Randomized block designed used with dextrin concentration as treatments that consists of three levels with four replications. The treatments are, dextrin concentration 0.8%, 1.6%, and 2.4%. The data were analyzed using ANOVA and continued by LSD analyzed if the treatment given significantly effect. The result showed that the treatment of dextrin 1.6% having the highest of total product value 2.27 and produced strawberry puree with the best quality during storage at temperature 10±2°C for 30 days. The characteristics of the strawberry puree are anthocyanin concentration 23.67 mg/kg, total ascorbic acid 78.12 mg/100g, total soluble solid 13.23%, moisture content 79.88%, pH 3.16, red color intensity (a* value) +30.80, degree of lightness (L* value) 35.40, and total of microbe 21.6 x 103 cell/g.
What factors effect to the learning achievements and self-description in polytechnic of road safety transport student?
Authors: Saroso S , Mukhadis A , Siswanto H , Tuwoso T
Published: December 2019

The aim of this study are, to determine the influence of achievement motivation, the inspiration of the learning model, service satisfaction, career expectations, to the achievement of learning and self-confidence Polytechnic of Road Transport Safety student. The sample in this research consist of 146 students of Polytechnic of Road Transport Safety. The data obtained from questionnaires distributed to the respondents. After the data collected continued with the validity and reliability test by using the formula Confirmatory Factors Index then the data were analyzed by using SEM technique. The results showed in general, the conclusion of this research there is influence of achievement motivation, inspiration from learning model, service satisfaction, and career expectation toward learning achievement and self-confidence of student of Polytechnic of Road Transport Safety. A more representative service model is needed for students such as the use of internet-based learning facilities to facilitate student access to meet the information needed to facilitate the learning process. Student service quality is the ability of lecturers to consistently meet student expectations.
Design of culinary information system based on android using multimedia development life cycle
Authors: Mulyani A , Septiana Y , Tresnawati D , Setiawan R
Published: December 2019

The development of smartphone application technology makes it easier for people to obtain information without being limited by space and time. One of them is the development of an Android smartphone-based culinary information system application that allows culinary information to be accessed anywhere and anytime online with the hope that it can be utilized in the field of marketing and promotion to increase sales and revenue. This article aims to design an Android-based culinary information system application to make it easier to provide culinary information to the public. The methodology used is a multimedia development life cycle with stages covering, concept, design, collecting, assembly, testing, and distribution materials. The results of this study are in the form of android-based culinary information applications. Contributions given by this application can provide typical culinary information from various regions, especially in Indonesia.
Designing the HRIS digital dashboard model using a CBHRM approach
Authors: Munthe A R S , Baswardono W , Satria E
Published: December 2019

CBHRM is one of the developing patterns of human resource management in Indonesia. In this approach, competence becomes a keyword. Every employee will be assessed based on the competencies they have. In order for the results to be more optimal, a good report / output presentation model is needed. One solution that the authors propose is to use a digital dashboard model. This dashboard model is built using a framework that has been adapted to the life cycle of the model. Case studies are carried out on regional development companies, and CBHRM digital dashboards built consisting of Talent Dashboards, Competencies Gap Dashboards, and Comparison Dashboards are interrelated with each other.
Asset management information system for higher education
Authors: Setiawan R , Kurniadi D , Aulawi H , Kurniawati R
Published: December 2019

Asset management is the process of recording, collecting data, reporting and documenting assets at a specific time based on existing provisions, proper asset management can support operational activities especially in the maintenance, repair, and procurement of assets for the organization. This study aims to design an asset management information system for the process of managing asset data and integrated asset depreciation calculation methods for universities. The methodology used in this research is Scrum, which can accommodate changes during the system design process, by taking samples based on the business process of asset management in one of the private universities. This study produced a web-based asset management information system prototype that can assist in managing asset data and calculating asset value depreciation.
Designing software product with Google Ventures design sprint framework in startup
Authors: Nashrulloh M R , Setiawan R , Heryanto D , Elsen R
Published: December 2019

Startup is becoming a trend in Indonesia. Various success stories from local startups such as Gojek, Tokopedia or Bukalapak, has become trigger for the emergence of new startups. The potential of internet users in Indonesia which is increasing from year to year is also a catalyst for establishing a startup. At an early stage, startup must identify user experience priorities and problems in developing software product phase. This chapter describes work in progress on a shortened version of Design Sprint approach, and its application to designing Software product in Startup. Google Ventures initially introduced Design Sprint to tackle critical business problems and come up with viable solutions within five days.
Designing smart dashboard system towards digital leadership in franchise organizations
Authors: Nashrulloh M R , Setiawan R , Satria E , Supriatna A D
Published: December 2019

Although franchise considered as a business system that has many features, that does not mean this business concept does not have weaknesses. Indeed, it’s been hundreds of years the format of this business is running. Even today the franchise business is getting its place as a proven business format and successfully delivering thousands of business brands across various continents and times. If the franchisor is less selective in choosing a franchisee, they may damage the franchisor’s image and business brand as a whole. The reason is if one franchisee does not comply with the operational standards provided by the franchisor then results in customer disappointment, it is not impossible that this customer will perceive all other outlets as bad. Using an innovation assimilation strategy framework, this paper describes how franchise organization used its implementation of a Smart Dashboard System to improve performance, allows franchisors to keep a handle on their franchise accounts and put it on a path towards digital leadership.
Combining readiness and success constructs for exploring the information system implementation performance: A model development
Authors: Alam C N , Putra S J , Subaeki B , Rahman A B A , Rahman T K A , Suryana Y
Published: December 2019

This study explained how to combine the technology readiness and success model of information systems (IS) in the context of exploring the factors that influence the readiness and success of IS implementation performance. As explained by many studies of IS, that most IS research models are developed by adopting, combining, and adapting previous studies. The researchers developed this model based on the input-process-output logic and professional and causal models of the IS success model. The developed model was structured in twelve variables and 42 indicators. The path influences between variables were presented by 28 links. Researchers broke down the model to the level of the assessment instrument in relation to the implementation of the research. However, the model development study may have limited in the used assumptions and understanding of the researchers, the study may contribute theoretically in terms of new model propositions. In addition, the development of the proposed model and the instrument for data collection may be a practical consideration point for further study.
Design and analysis of radio antenna monopole arrays in the military world
Authors: Darmawan Y , Rohadi E , Cahyani H , Adzikirani A , Imammuddin A M
Published: December 2019

The analysis and design of the proposed antennas is designated for receiving voice signals from Radio in general are out-of-prominent antennas and smaller indoor antennas, in this research, the authors aim to design and analyse an antenna with a simple design, a small dimension efficient, very easy installation, cheap and meet the antenna characteristics to support the movement in combat training within the Army. The antenna to be discussed is a monopole antenna Arrays with a minimalist shape that works at frequencies between 350MHz - 480MHz by adjusting the length of the horizontal elemental Active distance between the outer and inner to get the impedance matching. In order to obtain a unidirectional pattern, a metallic plane reflector is placed at a distance of about λ/4 from the array board: predicted gain (11 dB for 5 × 1 array and 15 dB for 9 × 1 array) and bandwidth (around 600 MHz) are larger than for conventional micro strip patch arrays having similar board dimensions. the proposed antenna has been numerically analysed for wireless communication systems.
A knowledge based system for diagnosing heart diseases
Authors: Munaiseche C P C , Rantung V P , Bawiling N S , Manggopa H K
Published: December 2019

The purpose of this study was to design a knowledge based expert system for diagnosing heart diseases by using forward chaining as one of inference technique and analyse the software functionality through black box testing. The heart organ chosen because many mortality rates are caused by sudden heart attacks. The research method consists of seven stages: preliminary studies, data collection, knowledge acquisition, knowledge representation, knowledge implementation, system evaluation, and the last, drawing conclusions. The software application recognizes the type of heart disease after consultation by answering a few questions about the symptoms of disease that displayed by the system, and can infer the type of heart diseases suffered by the patient. Based on the results of black box testing, the expert system application has been running with good functionality. The knowledge based expert system is designed to provide solutions or initial actions that can be performed by patient in relation to heart disease he suffered (early detection).
Neighborhood Geographic Information System to prevent home robbery
Authors: Ihsan M , Sugandi D , Affriani A R , Himayah S
Published: December 2019

The purpose of this study is to apply a geographic information system to analyse the vulnerability of home robbery in neighbourhoods. To support the research, we use the Scoring Method with a Crime Prevention Through Environmental Design using the Geographic Information System. The results showed that the Geographic Information System in the neighbourhoods could visualise the vulnerability, based on the analysis conducted, seven residential have the potential for home robbery because based on the Vulnerability analysis, the seven residential belong to the category of vulnerable categories (categories 3). Based on these results, the information from this study can be used as a reference and study material in maintaining security in neighbourhoods.
Building awareness of eco-centrism to protect the environment
Authors: Fios F
Published: December 2019

The environmental crisis that hit the global world has threatened the future of the human being and all living in the world. The root of the environmental crisis today that is due because of the “human factors”. Human mindset embodied in various forms of exploitation of the natural act of damaging our environment tragically. Understand anthropocentrism is so permeated human thought patterns stimulate human passion to continue to exploit nature without human arbitrarily. Natural objectified and regarded as a place to suck it for the benefit of human. And nature environment needs to be protected by human as moral person. One way to protect nature is not a great design technology, but change the mind set of people from anthropocentric paradigm to eco centrism awareness in order to protect the environment entity. The purpose of this study is to build a construction of ecological thinking to support environmental protection efforts. Using reflection methods especially deconstruction of Derrida, continuously critical of anthropocentrism is a must as one way to protect the environment in theoretical thinking frame. Through this frame of thinking, it can have constructed the concept of ecological awareness for protecting environment and the good condition to the earth and all reality of life. This concept is useful for enriching theoretical thinking to protect the environment.
Performance of maize under two different methods of fertilizer application in semi-arid tropic Dompu Indonesia
Authors: Arifin Z , Sukartono S , Susilawati L E , Kusumo B H , Yasin I
Published: December 2019

The placement of fertilizer is a crucial aspect for maximizing the nutrient uptake by maize. Maize may not produce an optimum yield and shows nutrient deficiency symptoms due to inefficient uptake of nutrients in spite of application of recommended fertilizer rates. A research was carried out to compare the method of fertilizer application for maize in five locations (five sub-districts) in the regency of Dompu, West Nusa Tenggara Province, Indonesia. The field experiment was designed in a completely randomized design (CRD), with 2 treatments for each location, and replicated 3 times. The treatments were (i) row placement of fertilizer which were given twice (P1), and (ii) broadcast application at once (P2). The results of the research showed that there was a significant difference in yield (dried maize grain) between treatment P1 and P2. The row placement of fertilizer given twice (P1) produced higher dried maize grain at all locations (average yield = 12.26 ton ha-1), compared to the broadcast method given at once (P2) with average yield of 7.98 ton ha-1. The yield was support with the other parameters such the height of crop, the size of cobs and the weight of above ground of dry matter.
Treatment of performance evaluation at Cisauk water treatment plant, Cisauk Sub-district, Tangerang
Authors: Ayu M S , Hadisoebroto R , Ratnaningsih R
Published: December 2019

Cisauk Water Treatment Plant (WTP) is one of the water treatment plants operated by PDAM Tirta Kerta Raharja, Tangerang District, which supply drinking water for Sub districts of Cisauk and Suradita with a capacity of 50 L/sec. This research conducted to evaluate the treatment performance of each unit at Cisauk WTP and compare the quality of water produced with the drinking water standard of PERMENKES No. 492 of 2010. Evaluation of WTP process is conducted by analysing the quantity and quality of produced water, and then calculate of design parameter for each unit. The processing unit consists of intake, hydraulic coagulation, hydraulic flocculation, sedimentation, filtration and ground reservoir. The coagulant used was NUSACHEM with dose of 35 mg/L and the disinfectant used was gas and liquid chlorine with dose of 3-5 mg/L. Through the WTP evaluation of treatment, not all units fulfil the design criteria based on SNI 6774 of 2008. However, the quality of the water produced fulfil the drinking water quality requirements of PERMENKES No. 492 of 2010.
Analysis of pollutant load due to greywater from riverbanks settlement on Ciliwung River segment 2
Authors: Putri R S , Hadisoebroto R , Hendrawan D I
Published: December 2019

Greywater from domestic activities on the riverbanks settlement in Indonesia usually channelled directly to the drainage or to the river. It will be decrease the river water quality. The aims of the research are to analyse the pollutant load that enters the drainage channel due to greywater from settlement in banks of Ciliwung River segment 2 and responses of society sanitation habits. The research was conducted at 6 villages are Babakan Pasar, Sukasari, Baranangsiang, Cibuluh, Kedung Badak, and Sempur. Water samples were taken from the drainage channel in the morning and evening, which are considered to represent the peak hours of greywater. Sampling was conducted in May, June and July 2018. Pollutant load based on BOD level in the drainage channel ranges from 4,903.19-132,804.33 kg/day. This condition shows the high tendency of pollution due to greywater domestic activities and absence of greywater treatment in residential areas. Almost 50% of the community understand the importance of the need for wastewater management. Community awarness for sanitation habits such as environment community service and maintenance and handling waste in drainage. The conclusion is that greywater treatment in riverbanks settlement is really needed to be applied.
Removal of heavy metal (Cu2+) by immobilized microalgae biosorbent with effect of temperature and contact time
Authors: Lieswito N A , Rinanti A , Fachrul M F
Published: December 2019

The purpose of this research was to removed heavy metal of Copper (Cu2+) with biotechnology using mixed-microalgae of Chlorella sorokiniana, Monoraphidium sp. and Scenedesmus obliquus bound in Na-Alginate. The effect of contact time and temperature on biosorption rate to achieve the highest efficiency were studied. Mixed-microalgae were dried in the oven, hulled, and trapping onto alginate polymer to forming an immobilized biosorbent or beads. The decrease of Cu2+ concentration was analyzed using Atomic Absorption Spectroscopy (AAS). Optimization of parameters was conducted by photobioreactor in batch system using concentrations of 20 mg/L Cu which were containing wastewater, biosorbent concentration of 0.5 g/g, pH 4 with setting of contact time (60, 120, 180) minutes and temperature (25, 35.45) oC. The results show that the maximum biosorption occurred at pH 4, temperature 35oC, contact time 180 minutes and removal efficiency of 96.4% was achieved. The research proved that immobilized biosorbent was very effective in reducing Cu2+ in wastewater and able to be used as a competitive and environment-friendly alternative method to control heavy metal pollution in water.
The effect of pH-temperature on plastic allowance for Low-Density Polyethylene (LDPE) by Thiobacillus sp. and Clostridium sp.
Authors: Islami A N , Tazkiaturrizki T , Rinanti A
Published: December 2019

LDPE are plastic polymers, widely used because they are affordable, waterproof, and flexible, hence difficult to degrade naturally. This study aim therefore is to degrade LDPE plastic using a biotechnology approach with a mixture of Thiobacillus sp. and Clostridium sp. at a variety of pH and temperatures. Mixed bacterial cultures were grown on Stone Mineral Salt Solution (SMSs) with a batch system, thereafter, gravimetric method was used to determine the difference in weight and Fourier Transformer Infrared Spectroscopy (FTIR) was used to determine changes in functional groups. To obtain the optimum condition that produces the highest degradation, researchers conducted the experiment at temperature varied from 25, 30, 35o C and pH 5, 7, 9. The highest removal of LDPE occurred at 30oC with pH 7. Gravimetrically, mixed cultures of Thiobacillus sp. and Clostridium sp. was capable of degrading LDPE plastic with an allowance of 2-7% for 30 days. Considering that this research produces a relatively small allowance, further research is needed to exploit the potential of using both bacteria in degrading LDPE plastic.
Environmental engineering for social resilience and tourism in Plajan Village Jepara Central Java Province
Authors: Samadi S , Komarudin K , Lestariningsih D S , Cahyana U , Wihardjo R S D , Suhardjo S , Rahardjo E T
Published: December 2019

We investigate the suitable model to carry out environmental engineering primarily in aspects of social resilience and tourism in Plajan Village Jepara Central Java. Using a mixed method, this study shows that social and tourism resilience can be developed by involving stakeholders in the village consisting of communities, entrepreneurs and local governments, as well as academic groups; these forces are communities that work together synergistically and coordinative. “The necessary conditions” for local environmental engineering towards social and tourism resilience in a sustainable manner is the need for village infrastructure, especially for tourist sites or spots that are still lacking in information. This infrastructure can be divided into two things: “gray infrastructure” and “blue infrastructure”. Gray infrastructure is public infrastructure that can disrupt community activities and tourism, such as roads, bridges, social infrastructure, while Blue infrastructure is directly related to local environments such as protected forests and water resources.
Removal of ammonia and phosphate parameters from greywater using Vetiveria zizanioides in subsurface-constructed wetland
Authors: Dewi N R , Hadisoebroto R , Fachrul M F
Published: December 2019

In urban area in Indonesia, such as Jakarta, it is very common that greywater generated from households run off into drainage system. The greywater that mixed together with rain water will flow onto river. Increasing population means increasing in households as well as greywater generated, that become serious problem when greywater becomes dominant in drainage system. To minimize the pollution from greywater in river stream, it was used the constructed wetland with subsurface system in riverbanks of Ciliwung river. The research was conducted using the vetiver (Vetiveria zizanioides) planted in the subsurface-constructed wetland to decrease the parameter of ammonia and phosphate from greywater. The aim of the research is to determine the removal efficiency of the parameters from greywater using the constructed wetland located in Srengseng Sawah sub district, South Jakarta City. With the residence time of 2 days, the parameter of ammonia could be removed 10% while for phosphate parameter was 30%. To reach the quality standards, it is suggested to add the pre-treatment of aeration for the wetland.
Evaluation at Cibinong Water Treatment Plant (WTP) in Bogor District
Authors: Widhianti R , Tazkiaturrizki T , Ratnaningsih R
Published: December 2019

Cibinong WTP using raw water sources from the Ciliwung River. Processed water from the Cibinong WTP serves 5 sub-districts, namely, Tajur Halang, Bojong Gede, Cibinong, Babakan Madang and Citereup districts. The research covered raw water quality, evaluation of the existing WTP condition and optimization of work of operation unit and process. Cibinong WTP consist of unit intake, hydraulic coagulation, hydraulic flocculation, sedimentation plate settler, rapid sand filtration, and ground reservoir. The coagulant used is 5% alum with a dose of 25 mg / L and disinfectants that use liquid gas and chlorine at a dose of 1.4 mg / L. Specifications for installation of drinking water installations use standards that are in accordance with SNI 6774 in 2008 concerning procedures for processing plant package units. Water quality in accordance with the Minister of Health Regulation 492 of 2010 concerning drinking water quality requirements. Cibinong WTP has several units that have not met the 2008 SNI 6774 standard but, the quality of the water already in accordance with the regulation of Minister of health no 492/2010.
Water conservation model in Ayung river estuary based on ecotourism
Authors: Eryani I G A P , Jayantari M W
Published: December 2019

The Ayung river basin is the largest watershed in the Bali Penida River Region. The increase in population and the demands of a more viable livelihood have encouraged people to continue to strive to meet all their needs and the development of tourism in Bali that is growing rapidly, but behind that there will be a negative impact caused mainly on the river water environment and river estuary. For this reason, it is necessary to evaluate the environmental conditions of river estuaries and environmental arrangements to be able to support water needs and tourism activities. The purpose of this study was to create a model of water resources conservation at the Ayung river estuary based on ecotourism. The research method uses qualitative methods, which will integrate conservation of water resources that may be carried out in research areas based on ecotourism. The data used are in the form of primary data and secondary data where the primary data is in the form of observations directly to the location of the study and survey by interviewing the surrounding community about tourism activities in the research location. Meanwhile, secondary data in the form of water potential data, land use, topography obtained from survey and related agencies. The results of the study using the SWOT model obtained several alternative conservations that can be done based on ecotourism.
Exploitation of natural materials energy in eastern Indonesia and efforts to fight for the sovereignty of local communities
Authors: Fios F
Published: December 2019

One form of development activities carried out by humans is the exploitation of natural materials energy. Often the activity of exploiting natural material energy is only oriented to human interests, but ignores aspects of sovereignty (autonomy) of nature and the future of members of the local community of exploitation place. This paper shows field observations and literature reviews on the practice of energy exploitation of natural materials in Eastern Indonesia, which lacks attention to the dimensions of the balance of nature and the interests of local communities. Eastern Indonesia has not prospered because it is still struggling to obtain their sovereignty in the exploitation of natural materials in their own land. Often social conflicts arise due to the exploitation of material energy carried out. This study aims to find the phenomenon of natural exploitation in eastern Indonesia and build awareness to create sovereignty for local communities. The research method uses interpretative analysis and philosophical reflection to get meaning. Research found a theoretical model that is useful for overcoming the problem of exploitation that occurs. Those humans must transform themselves into ecological human beings so that they can bring practical benefits to the good of nature and East Indonesia local people towards the vision of sustainable development.
The evaluation of sterilization protocol for sprout explants in oil palm (Elaeis guineensis Jacq.) tissue culture
Authors: Neliyati N , Lizawati L , Zulkarnain Z
Published: December 2019

The objective of this study was to develop an efficient protocol for sterilization of sprout explants in tissue culture of oil palm. Plant materials used were plumulae and radicle from sprouts of the D x P Sriwijaya variety obtained from Seed Processing Unit PT Binasawit Makmur, Palembang. The medium used was MS composition was supplemented with vitamins, myo-inositol and sucrose, and the pH was set at 5.8 ± 0.02 before being solidified with agar. Cultures were maintained under a light intensity of 1,500 lux and 16-hour photoperiod and temperature of 24 to 26°C. Five protocols for the eradication of explant contamination were tested. i.e. There were 5 (five) different methods of explant sterilization employed, ie: A) explants were washed with sterile aquadest followed by soaking in 70% alcohol for 1 minute; B) explants were washed with sterile aquadest followed by soaking in 1% Benlox 50WP solution for 30 minutes, 1% Agrept 20WP for 30 minutes, and soaking in 70% alcohol for 5 minutes; C) explants were washed with sterile water plus detergent, followed by soaking in 1% Benlox 50WP plus few drops of Tween-80 for 30 minutes, soaking in 1% Agrept 20WP plus few drops of Tween-80 for 30 minutes, soaking in 70% alcohol for 5 minutes; D) explants were washed with sterile water plus detergent, followed by soaking in 0.1% HgCl2 solution for 30 minutes; and E) explants were washed with sterile water plus detergent, followed by soaking in 0.2% Dithane M-45 plus few drops of Tween-80 for 30 minutes, soaking in 1% NaOCl for 5 minutes, soaking in 0.1% HgCl2 plus few drops of Tween-80 for 30 minutes. The results showed that treating the explants with 0.1% HgCl2 for 30 minutes following 0.2% Dithane M-45 and 1% NaOCl applications was proven to be effective for the eradication of contamination.
The evaluation of various nutrient formulation on the growth of lettuce (Lactuca sativa Var. Arista) in hydroponic raft system at tropic region
Authors: Frasetya B , Taofik A , Sholehah M
Published: December 2019

Lettuce (
Lactuca sativa Var. Arista) is leaf vegetable which consumes as a fresh vegetable. The quality is a crucial role in increasing the market price of lettuce. A large number of nutrient solution is sometimes confusing the farmer or grower which will they choose. The research objectives evaluate five nutrient formulation from local formulator and global formulator. This research conducted in June to July 2018 at Greenhouse of Universitas Padjadjaran, Jatinangor. Indonesia. The experimental design used in this research was completely randomized design with five treatments of nutrient formulation e.g., Sutiyoso (local formulator), Hoagland & Snyder, Hoagland, Shive & Robbins, and Resh Lettuce Anguila. The parameters of lettuce growth (plant height, leaves a number, leaf area, fresh weight of the plant, dry weight of the plant) observe and measure. The data of lettuce plant growth than analyzed with variance analysis α=5% and post hoc test analysis use Duncan multiple range test α=5%. Each of the treatment replicate five times. The results showed that different of nutrient formulations for lettuce have a different effect on growth parameters such as of plant height, number of leaves, leaf area, fresh weight of the plant, dry weight of the plant. The Sutiyoso nutrient formula effective for tropical lettuce hydroponics in Indonesia.
Antibacterial activities test of Cajuput Leaf Waste extract (Melaleuca cajuputi Powell) on Pathogenic Bacteria
Authors: Ukit U , Widiana A , Rahmawati E , Hasby R M
Published: December 2019

Cajuput plant (Melaleuca cajuputiPowell) and its waste is one of the plants that can produce atsiri oils. Cajuput plant essential oil has the largest compound component, 1.8 cineol which has the ability as an antibacterial to kill pathogenic bacteria. The purpose of this study was to determine the antibacterial activity of cajuput leaf waste extract against pathogenic bacteria and find out the category of inhibition zones formed from extracts of cajuput leaf waste. This study used a completely randomized design method. Cajuput leaf waste used has a shelf life of 0, 2 and 4 months old. The pathogenic bacteria used consisted of 17 isolates, each treatment was repeated twice. The results showed that cajuput leaf extract had antibacterial activity known by the formation of inhibitory zones. The inhibitory zone in the extract of the 0-month leaf waste was greater than in the leaf extract of leaf of 2 months and 4 months. The diameter of the inhibition zone is at most 13 mm and at least 1 mm. With these results, it can be concluded that the antibacterial activity of cajuput leaf waste belongs to the category of low to strong.
The effects of subtrat composition on the growth of Brassica oleraceae Var. Achepala with drip hydroponic
Authors: Taofik A , Frasetya B , Nugraha R , Sudrajat A
Published: December 2019

The drip hydroponics system has a weakness which at a high evapotranspiration condition can’t fulfill plant water requirement properly. Improving the composition of plant growth media with cocopeat and rice husk charcoal is a solution to increase Kailan Plant Growth. This research aims to study the effect of a ratio between cocopeat and rice husk charcoal as plant media to increase productivity of Brassica oleraceae on drip hydroponic. The research was conducted at Jatinangor-Sumedang-West Jawa from November to December 2017. The method of this research used completely randomized design with five treatment (A=Cocopeat 100%; B=Cocopeat 75%+ Rice Husk Charcoal 25%; C = Cocopeat 50% + Rice Husk Charcoal 50%; D = Cocopeat 25% + Rice Husk Charcoal 75%; E = Rice Husk Charcoal 100%), and five replication. The growth indicator in this research is plant height, number of leaves, leaf area, fresh plant weight, and shoot-root ratio. The ratio of cocopeat and rice husk charcoal as plant growth media affect the plant growth of kailan. The result showed that composition grows media Cocopeat 75% + Rice husk charcoal 25% affect plant height, fresh plant weight, and shoot-root ratio. The plant grow substrates with good aeration and water holding capacity can improve Kailan plant growth on drip irrigation system.
Comparing the Javanese Edelweiss (Anaphalis javanica) density in Tegal Alun, Tegal Bungbrun and Pondok Saladah of Mount Papandayan
Authors: Amalia L , Hakim W L , Miranti M , Putri D I , Kristianti T
Published: December 2019

Javanese Edelweiss (Anaphalis Javanica) is a natural plant possessing enormous ecological benefits. It is commonly found in volcanic ash deposits and soils as in Mount Papandayan. However, It is considered as an endangered species. This study was intended to: (1) compare the density of Javanese Edelweiss in Mount Papandayan especially in Tegal Alun, Tegal Bungbrun and Pondok Saladah; (2) find out the abiotic factor effects (temperature, light intensity and soil pH) on the Javanese Edelweiss density. To this end, this study employed quantitative descriptive method. The data were collected through belt transect technique covering 100-meter-in-length and 5-meter-in-length tracks in the three different locations; Tegal Alun (28 transects), Tegal Bungbrun (3 transects) and Pondok Saladah (10 transects). The result found that the density of the Javanese Edelweiss in Tegal Alun, Tegal Bungbrun and Pondok Saladah was different. The density values are 2275.7 trees per hectare in Tegal Alun, 946.7 trees per hectare in Tegal Bungbrun and 366 trees per hectare in Pondok Saladah. For the abiotic factors, the statistical analysis revealed that air temperature, light intensity and soil pH simultaneously influence the density of Javanese Edelweiss with R = 0.85 and effect size of 70%.
The effect of swimmer crab flour (Protunus pelagicus) and Arbuscular Mycorrhizal Fungi on flowering and yield of Japanese Cucumber (Cucumis sativus L.)
Authors: Hidayat C , Ahyar Y , Setiati Y
Published: December 2019

Swimmer crab flour (Protunus pelagicus) which has high Ca content and Arbuscular Mycorrhizal Fungi (AMF) can be used to overcome acid soil. The aim of this research was to know the interaction effect of swimmer crab flour and AMF on increasing acidic dry soil productivity for the growth and yield of Japanese cucumber plant. The polybag research was conducted at Nagreg Subdistrict, West Jawa, Indonesia from May to July 2018 using Randomized Block Design with two factors and three repilactions. The first factor was swimmer crab flour doses (control, r1 = 9 g 5 Kg soil−1, 12 g 5 kg soil−1,15 g 5 kg soil−1 and 18g 5 Kg soil−1) and the second factor was AMF dosage (control, 5 g crop−1 and 10 g crop−1). The results showed that there was an interaction effect of swimmer crab flour and AMF on the root infection degree, there was main effect of swimmer crab flour on flowering time, dry weight of fruits, and harvest index of cucumber, and there was an main effect of AMF on the harvest index. Thus the application of swimmer crab flour more reliable to increase japanese cucumber production.
Jigsaw learning model base on cooperative instructional strategies to improve academic discussion in adult education on environment concepts
Authors: Yatimah D , Solihin S , Adman A , Syah R
Published: December 2019

This study investigates the contribution of the Cooperative Learning Strategy in developing academic discussions. Academic discussion is an important element of historical thought, which is considered to increase conceptual understanding and support the development of democratic citizenship by helping students interpret, understand and connect patterns of human activity across time in the environment. Adult learners as a condition of research participated in this study. Student students today will learn effectively that he is directly involved in learning, his ideas, learning and teaching material, learning with his profession. This study aims to determine jigsaw learning based learning in improving adult learning on the concept of the Environment. The method used is descriptive qualitative. The study sample was around 25 people at the Jakarta State University Environment. The outcome variables discussed in this paper are adult learners who have the self-concept, experience, and self-esteem of adult students and the classroom climate. During the study period, cooperative learning did not significantly increase the self-esteem of adult students.
Innovation works of critical impact training model based on mass media to improve the capability of environmental critical learning for learners of the critical pedagogics
Authors: Yatimah D , Adman A , Solihin S , Syah R
Published: December 2019

Learners critical thinking skills in environmental concepts can be improved by one of them by realizing learning through critical literacy training based on mass media. The research was conducted at the Didactic LPM Secretariat, UNJ as a routine meeting of the NGO Unlimited Schools office on Kemandoran Street. Empirical information about the improvement of critical learning skills of members of critical pedagogy groups. The method used in this study is Practical Action Research or action research by organizing a learning action in a training model. The results of research obtained showed an increase in critical learning skills of members of the critical pedagogy groups after being given a treatment. The average increase in their critical learning abilities reaches 43%. The conclusion that can be drawn is that this study is likely to be used for critical learning that is used functionally in other objects.
Flavonoid of some antioxidant plants in Taman Wisata Alam Pangandaran
Authors: Rahayu S , Tania N
Published: December 2019

Flavonoids can be found in every organ of plants and has a role as natural antioxidant. The aim of this research was to investigate the influence of maceration and drying time to the level and the type of flavonoids from some leaves of plants located in Taman Wisata Alam Pangandaran. This research used CRD (Completely Randomized Design) with 2 factorial design. The first factor was soaking time of the plant extract in ethanol 96% for 24 hours and 48 hours, the second was drying time for 14 and 21 days. Sample used were Bungur (Largerstoremia speciosa L.), Mahoni (Swietenia macrophylla), Nyamplung (Calophyllum inophyllum L.), dan Vitex (Vitex pubescens Vahl.) leaves. Qualitative parameter was determined from the change of color of the solution as well quantitatively by spectrophotometer of 415nm. Flavonoid type was then analysed using spectrophotometer at 250-560nm. Qualitative result showed that all plants assessed contain flavonoid in varying level. The type was also ranging between each sample. Quantitative analysis of 2 ways ANOVA showed that maceration and drying were shown significance influence with optimum flavonoid level varying from one plant to another. It can be concluded that all plants tested positively contain flavonoid with different type and immersion as well as drying has significantly affected the quantity of flavonoid result in plants.
Isolation of potential proteolytic bacteria from hospital wastewater
Authors: Dewi S R , Paramasatiari A A A L , Rusni N W , Suwarna I W
Published: December 2019

Wastewater needs to be processed before being disposed of. Generally, the wastewater that produced by a hospital contains a lot of bacteria, viruses, chemical compounds, and drugs which can be harmful to the health of the surrounding community. For this reason, it is necessary to process hospital wastewater by using effective and efficient wastewater treatment technology. One of the processes of wastewater treatment is biological processing that uses microorganisms. The aim of this study is to isolate microbial that produce proteolytic capabilities that are potential in treating hospital wastewater. This research is a descriptive study with a cross-sectional design. Samples were taken from the Wastewater Treatment Plant Installation of Kasih Ibu General Hospital in Denpasar. The screening of the proteolytic bacteria was done by growing the isolated culture on skim milk agar. The colonies that produce clear zone were identified as proteolytic bacteria. In this study, a total of 43 isolates were obtained and two isolates showed their proteolytic activity. Both isolates are Gram-positive cocci and Gram-negative bacilli.
The differences in the types of packaging and duration of storage on the quality of Tilapia (Oreochromis niloticus)
Authors: Pandit I G S , Permatananda P A N K , Wulandari R
Published: December 2019

One of the most popular types of tilapia dishes is nila nyat nyat, which is boiled with Balinese spices until the water runs out. This study aims to determine the interaction between the different types of packaging and the length of storage to the quality of tilapia boiled with Balinese spices and to know the differences in the type of packaging and the length of storage to the quality of tilapia boiled with Balinese spices. The method used in this study was a factorial complete randomized design with 2 factors, namely; factor A (type of packaging) which consists of 2 types: Styrofoam (A1) and mica (A2) and factor B (storage time) which consists of 3 types: 0 days (B1), 3 days (B2), and 6 days (B3). Observations include subjective and objective observations were done. The interaction between packaging type and storage time only affects the Total Plate Count (TPC) value of tilapia boiled with Balinese spices. The types of packaging, both Styrofoam and mica, have a significant influence on the value of TPC. Storage time in cold temperatures has a significant effect on the quality of tilapia boiled with Balinese spices.
Environmental literacy of biology undergraduate students in Jakarta: Profile and comparative analysis
Authors: Sigit D V , Azrai E P , Setyawati D N , Ichsan I Z
Published: December 2019

Environmental Literacy (EL) was the ability to interpret and take appropriate action on environmental systems that purpose to conserve, restore and improve the environment. This study aimed to determine the EL level of biology undergraduate students. The method used the descriptive method. There was 6 indicators in EL. Data were obtained from 197 samples of the 4th semester of biology undergraduate students in the 2017-2018 from 5 universities in Jakarta which consists of Biology Science program and Biology Education program. The results were level EL of biology undergraduate student in the high category. Based on their majors, the EL of undergraduate students in biology science was higher than undergraduate students in biology education. Differences in EL levels based on gender, female was higher than Male. In conclusion, the Biology undergraduate student’s EL varies from various aspects. The institution has an important role to enhance the student EL. Therefore, a student should increase the EL.
Biosurfactant-producing and anthracene-degrading bacteria from oil contaminated soil
Authors: Kurniati T H , Rusmana I , Suryani A , Mubarik N R
Published: December 2019

Anthracene, together with other polycyclic aromatic hydrocarbons (PAHs), is a persistent and toxic soil contaminant because its low water solubility and high hydrophobicity. The effectiveness of PAH degradation could be enhanced by using biosurfactant. In this study, we isolated bacteria that were able to degrade anthracene and also produce biosurfactant. Samples were taken from oil contaminated soil at Jakarta Bay. Isolation was done in a Minimal Salt Medium (MSM) supplemented with 1% crude oil. Screening methods for biosurfactant production include Blood Hemolysis, Drop Collapse Assay and Oil Displacement Assay. Three isolates which have biosurfactant production and anthracene degradation capability was identified based on 16SrRNA gene. These isolates were identified as Ochrobactrum intermedium AMA9, Ochrobactrum tritici CHA60, and Pseudomonas stutzeri CRA7. Based on GC-MS analysis, Ochrobactrum intermedium AMA9 showed high ability to degrade 84,79% anthracene in liquid MSM medium supplemented by 100 ppm anthracene after seven days incubation.
The effect of vermicompost application on the growth of lettuce plant (Lactuca sativa L.)
Authors: Frasetya B , Harisman K , Maulid S , Ginandjar S
Published: December 2019

The application of salt fertilizer to increase the productivity of lettuce in long term application will decline soil fertility. Implementation of totally organic farming in some region cannot increase productivity rapidly. The application of vermicompost combined with inorganic fertilizer is a solution to overcome decline lettuce production on the first time implementation of the organic farming system. This research aims to study the dose application of vermicompost on the growth of lettuce plant. The research conducted at Cisurupan-Garut West Java Province with altitude 1183 m above sea level from January to March 2018. The method used in this research is randomize block design with seven treatments (A = without vermicompost, B = 5, C = 10, D = 15, E = 20, F = 25, G = 30 t ha-1), and four replication. The growth parameter observed in this research was plant height, number of leaves, fresh plant weight, plant dry weight, and shoot-root ratio. The data observation parameter than analysed with variance analyse at five per cent signification level. The result of this research shows that the application of 5 t ha−1 vermicompost improves plant growth significantly.