bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Dynamic of Convergence Zone Displacement in Western Pacific Ocean on 2015 Super El Niňo Event
Authors: Ashafahani A A , Wirasatriya A , Pranowo W S , Sugianto D N , Maslukah L 
Published: May 2021

Abstract
Warm pool and the existence of equatorial processes in the Pacific Ocean have an important role on El-Nino Southern Oscillation (ENSO). The eastward advection of warm and less saline water from the western Pacific together with the westward advection of cold and more saline water from the central-eastern Pacific induces a convergence of water masses at the eastern edge of the warm pool. The aim of this study is to determine convergence zone displacement in Western Pacific Ocean based on oceanography parameters such as temperature, salinity and surface current from insitu Argo Float, satellite and model data. The convergence zone displacement was characterized by proxies variable of isotherm 28,5 °C and isohaline 34,6 psu. The convergence zone is zonally displaced in association with EI Niño-La Niña and wind-driven surface current variations. The displacement of the convergence zone moved as far east as 136 °W in the eastern Pacific during the 2015 Super El Niňo. Otherwise, convergence zone moved westward near 154 °E in the western Pacific, during La Niňa periods. During Super El Niňo, the stronger-than-normal speed of the North Equatorial Counter Current (NECC) was increased by 0,8 m/s and appears to have been a major factor in convergence zone reaching the far eastern Pacific. A strong significant positive correlation (R= 0.88, 0.82 and 0.84) between SST and skipjack tuna catch on Super El Niňo, La Niňa and Normal respectively suggested that changes in skipjack CPUE occurred in phase with movement of convergence zone.
Median Lethal (LC50-48) with Azadirectha Biopestisides in Post Larva Tiger Shrimp (Penaeus monodon) in Low Salinity
Authors: Septiningsih E , Sahabuddin  , Permatasari D 
Published: May 2021

Abstract
The agricultural system in Indonesia is now more advanced by combining agriculture and fisheries on the same land, so research like this is carried out. This study aims to investigate the lethal concentration (LC50-48 hours) of the active ingredient biopesticide Azadirectha on tiger shrimp at the post-larvae stage, and to analyze the effect of Azadirectha biopesticide on the behavior of tiger prawn post larvae. The concentration of biopesticides used in the main test was determined from the results of 3 preliminary tests with an upper threshold value of 90,000 ppm and a lower threshold value of 30,000 ppm. Five biopesticide concentrations were used for the main test, i.e. 37,372 ppm, 46,555 ppm, 57,994 ppm, 72,244 ppm, 89,994 ppm, and control. The data analysis technique for LC 50 uses probit analysis. The results obtained by the lethal concentration (LC50-48 hours) with Azadirectha biopesticide on mortality of tiger shrimp post-larvae were 54,719.57 ppm, the effect of biopesticides on post larvae behavior of tiger prawns at a concentration of 40,000 ppm only stayed at the bottom and even died while with a maximum biopesticide. At the concentration of 37,372 ppm, the shrimp showed active behavior, making it a safe concentration limit for the shrimp to sustain a living.
Validation of Badan Informasi Geospasial Tide Model in the Sunda Strait Waters using Sebesi Island Tide Gauge Data
Authors: Putra A A , Soepardjo A H , Purwanti S , Widyantoro B T , Efendi J , Pramono G H 
Published: May 2021

Abstract
Badan Informasi Geospasial (BIG) has developed tide model using 128 tide gauges (TG) data in 2015. During the period of 2016-2020 BIG has established new 31 TG and these stations have not yet been included into the model, one of them was Sebesi TG located in Sunda Strait. The aim of this research was to validate the BIG tide model using latest data of Sebesi TG by comparing Harmonic Constituents (HC) and tide prediction. HC to be compared were M2, S2, N2, K2, K1, O1, P1, Q1 from BIG tide model and Sebesi TG data. Each HC were used to generate tide predictions for August 10-20, 2020 compared with Sebesi TG raw data. HC comparison results showed the maximum amplitude difference was S2(0.011 m) and minimum was Q1(0.001 m). The maximum phase difference was Q1(14.2170) and minimum was N2(1.4510). The RMS generated for tide prediction using BIG tide model HC compared to TG raw data was 17.788cm, while RMS generated for tide prediction using HC from Sebesi TG data compared to TG raw data was 17.707cm. The correlation between raw data and tide prediction using BIG tide model HC was 0.977 while the correlation between raw data and tide prediction using Sebesi TG HC was 0.980.
Spatial Technology Based Participatory Digital Database for Village Potentials
Authors: Nurdin N , Inaku D F , Rasyid A R , Agus  , Akbar AS M. , Al Azizi S Q , Alimuddin A , Jalil A R 
Published: May 2021

Abstract
Geodatabase or digital spatial database is one of the GIS applications with an integrated database that has become a data source center that can be accessed for information and analysis needs by various existing applications. Participatory digital database has the potency to be used for inventorizing and collecting a complete, comprehensive, and detailed village/sub-district potentials spatial data. This research aims to provide knowledge as well as skills to the community, especially sub-district officials about a standardized spatial-based digital database of village potentials. The study took place in Langnga village, Mattiro Sompe District, Pinrang Regency, South Sulawesi, Indonesia. Methods used in this research are UAV Data Processing, Geodatabase System Compilation, Census and Cadastre Surveys, and Integration of Non-Spatial Data with Spatial Data. By compiling village potentials geodatabases, we constructed a Langnga village’s potentials map which can be used as a reference for planning and development of the village.
Empowering Fish-Farmer through Coastal Field School: Towards Sustainable Aquaculture Practice
Authors: Qurani I Z , Fawzi N I , Fadilah R , Kismorodati W 
Published: May 2021

Abstract
Central Java Province is among the largest aquaculture producers in Indonesia. This hefty contribution also comes with a challenge of degraded coastal areas primarily due to mangrove conversion into ponds, land subsidence, and raising sea surface. In Demak Regency, abrasion and robs flood have adversely affected the farmers’ aquaculture ponds since the past decades. The changing coastal environment and lack of knowledge to adapt in aquaculture management led to declining production that hampered the community’s resilience in the future. To help the farmers to thrive, an initiative called Coastal Field School (CFS) was implemented in 10 villages in Demak. Principally, CFS is a participatory learning method that emphasizes problem solving and discovery based on learning toward their production systems. The entire CFS program took place in 2015 – 2020, however this study only focused on the CFS conducted in Bedono village during May 2019 – September 2019. This paper discusses the CFS impact on the farmers’ knowledge change using the indicators of farmers’ program participation level, pre-test and post-test result to determine the knowledge improvement, aquaculture management technique, and productivity rate. The test was analyzed using a paired t-test where the knowledge level of farmers increased significantly (p < 0.001). The farming productivity rate also improved by nearly 30%. It is concluded that CFS can strengthen the farmers’ resilience in the degraded coastal area in Demak.
The distribution of Corbicula fluminea (Muller, 1774) and its outer shell colour in Sabah and Sarawak
Authors: Aweng E R , Arham Muchtar A B , Salam M A , Sharifah Aisyah S O , Azlan A , Zulhazman H , Mohammad Amizi A , Zul Ariff A L 
Published: May 2021

Abstract

Corbicula fluminea is one of the freshwater bivalves, which is small in size and lives in the river or at the bottom of the lake all over Malaysia including Sabah and Sarawak. Corbicula fluminea comes in different outer shell colour for different sites. The differences in outer shell colour are believed to be due to substrates composition, and land uses. Thus, to determine the distribution of Corbicula fluminea in Sabah and Sarawak and to determine the influence of river substrates and land uses on the outer shell colour of Corbicula fluminea, a survey was conducted in the selected area involving Sabah and Sarawak. The method utilized was by obtaining information from the villagers through informal conversational interview, observations, and followed by collecting the samples at the river using a special tool. The coordinate of each place where the sample was taken was recorded using the Garmin model GPSmap 62. Meanwhile, the digital calliper was used to measure shell height (H) and length (L). Statistical analysis of the chi-square test has been used to determine the relationship between the considered categorical variables in this study. Results indicate that the state of Sarawak has an irrigation canal that provides irrigation to the paddy field and one river, namely Sarawak Kanan River, which contains C. fluminea. As for Sabah, C. fluminea was found in 2 irrigation canals that also provide irrigation to paddy fields and 2 rivers, namely Tempasok River in Kota Belud and Kinarut River in Papar. Meanwhile, from the chi-square test result clearly shows that the outer shell colour of the C. fluminea depends on the type of substrate and landuse but not influenced by the location neither by zone nor the area such as urban, suburban or rural at the significant level of 0.05. This data is expected to be used by the authorities responsible for finding the conservation and restoration methods to ensure that C. fluminea does not disappear from the state of Sabah and Sarawak. This study could also help to ensure that the source of income for traditional fishermen who depend on C. fluminea is not affected.
Organic content and the number of Corbicula fluminea (Muller, 1774) in Lubok Tani Irrigation Canal, Tumpat, Kelantan
Authors: Rak A E , Omar S A S , Ibrahim M Z , Samae S H 
Published: May 2021

Abstract

Corbicula fluminea can be found living in the bottom of lakes, rivers and irrigation canal in Kelantan. C. fluminea usually receives nutrients and food source that are carried along with the runoff and these nutrients are considered pollutants to the water. Plus, the number of C. fluminea present is believed to be influenced by organic content in the sediment. Hence, the objective of this study was to determine the concentration of organic matter in the sediment and the number of C. fluminea at Lubok Tani Irrigation Canal, Tumpat, Kelantan. Samples were collected from two points, with six composites sampling of sediment and six samples of C. fluminea. Thus, organic matter in sediment was measured using Loss on Ignition analysis. The results indicated that an average of 55 clams was collected at the left bank, 57 clams at the middle and right bank. The average organic matter at the left bank was recorded at 1.61%, centre at 1.37%, and right bank at 2.42%. The results showed that area with higher organic matter had higher composition and size of C. fluminae. This study also showed that C.fluminae in the study area started to reproduce in May and believed to be matured in August. However, more data collection is required to obtain a significant statistical correlation. In conclusion, organic matter in substrates can influence the composition and size of C. fluminae and the suitable harvest time can be scheduled to ensure the sustainable harvesting.
Meat and meat-based products: Challenges and opportunities in halal food security
Authors: Ruzulan Z , Jamaludin M A , Ishak A H 
Published: May 2021

Abstract
The demand for halal meat and meat-based products among the Muslim population in Malaysia has been increasing as meat is an essential food. Meanwhile, the non-Muslims are also becoming aware of the quality of halal meat, hence the access towards halal meat and meat-based products are increasing as well. However, the local production of halal meat is insufficient to cater the demand and this leads to the dependency on imported meat to ensure that halal meat is made available and accessible to the society in Malaysia. This paper discusses the challenges and opportunities of halal meat and meat-based products for the sustainability of the halal food security in Malaysia. Document searching technique based on the available literature was used to fulfil the objectives of the study. The study found that the complex halal meat chain with several government agencies concerning halal matters lead to the inefficient treatment of maintaining the halal integrity. For this reason, focusing on the viable opportunities to increase the local meat production is significant in ensuring that the supply of meat is sufficient and halalan tayyibban.
Relation subsidence and water level of peatland cultivated with oil palm in Riau, Indonesia
Authors: Wasilul Lutfi M , Baskoro D P T , Anwar S , Pulunggono H B 
Published: May 2021

Abstract
This study was aimed to determine the relation changes in the subsidence and the depth of water level of peatlands cultivated with oil palm. The research site is the oil palm plantations in Koto Village, Gasib District, Siak Regency, Riau, Sumatera. The observations were in 4 blocks, namely block L1 (shrubs), Block D1 (oil palm aged 15 years), D8 (oil palm aged 10 years), and D31 (oil palm aged 20 years). Research parameters include peat subsidence and groundwater level. The results showed that the value of peat subsidence was fluctuative. This fluctuation was due to the rise and fall of the groundwater level. The highest rate of decline is shown in block L1 with 0.75 cm y−1 with SD 1.03 and the groundwater level in D1 with 52 cm. The water level is influenced by the condition of the monthly rainfall. The correlation between land subsidence and peat water level shows a close and significant relationship (p <0.01, r = 0.871).
Effect of different drying methods on the antioxidant properties of leaves of Centella asiatica
Authors: Abdul Rahim M S A , Baharudin N A , Ahmad Nazri I A , Mohamad S , Muazzam K A A R 
Published: May 2021

AbstractCentella asiaticais one of the vital plant sources of antioxidants properties for consumption or medicinal purposes. This study aimed to determine the effect of three different drying methods (freeze drying, oven drying and dehydration drying) on the antioxidant of leaves ofC. asiatica. The antioxidant properties and IC50value of different concentration of methanolic extract solution (0.5 mg/ml, 0.25 mg/ml, 0.125 mg/ml and 0.062 mg/ml), were evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. The drying conditions and time required for freeze drying, oven drying and dehydration drying were -45°C for 3 days, 60°C for 5 hours and 35-43°C within 1-3 hours, respectively. Samples with lower IC50value showed a stronger antioxidant activity since low IC50 determine the efec. The freeze-dried ofC. asiaticasample at 0.05 mg/ml concentration exhibited the highest scavenging activity (93.97 ± 0.45%) with the lowest IC50value (0.05 mg/ml) whereas the lowest scavenging activity was shown by dehydration dried ofC. asiaticasample at 0.05 mg/ml concentration (55.08 ± 0.03%) with the highest IC50value (0.36 mg/ml). This indicates that as the concentration increases, the radical scavenging activity increases. Thus, it is highly recommended to use freeze drying as the method to conserve the maximum amount of antioxidant properties inC. asiaticaleaves.
Projected conservation of agricultural land to prevent detrimental effects of land-use changes upstream Brantas Watershed in Indonesia
Authors: Bushron R , Rachman L M , Baskoro D P T 
Published: May 2021

Abstract
This research aims to project the conservation of agricultural land due to land-use changes in 2029 in the upstream Brantas watershed, in avoiding agricultural land degradation to realize sustainable agriculture. This study applies the Cellular Automata (CA)-Markov combined model to quantitatively predict and spatially simulate the trend of land-use change in 2029. Analysis of total sediment and flow out uses Soil Water Assessment Tools (SWAT) analysis applied to land use in 2019, and land use in 2029 the CA-Markov prediction result. After that, a technical vegetative and civilian conservation projection model was carried out using SWAT. The results of the observation-model sediment validation resulted in a Nash-Sutcliffe Efficiency (NSE) value of 0.87. The projection results of agricultural land conservation in land-use in 2029 resulted in a total sediment value of 1500,483 tons/ha/year, indicating a decrease in total sediment of 55 % compared to the total sediment in 2029 without conservation, and and 8% compared to the total sediment in 2019.
Viability of bovine opu-derived oocytes to honeybee as cryoprotectant
Authors: Jie T C , Rahman M M , Pitchayapipatkul J , Mashitah S M , Nor Azlina A A , Raja Ili Airina R K 
Published: May 2021

Abstract
This study designs to determine the effectiveness of Honeybee (HB) as cryoprotectants (CP) on viability vitrified-thawed bovine oocytes derived from OPU using Trehalose as control. Cattles were subjected to superstimulation protocol, per session conducted five days where three days both cattle were administrated 100 mg follicle stimulation hormone (FSH) within 24 h once and two days of “resting period” totalling two sessions. The “coasting period” (FSH starvation) between sessions was four days (96 h). Oocytes collection via OPU were performed at fifth day (120 h). The ovarian growth was observed via ultrasonographic before OPU. Prior to vitrifying oocytes with treatment Trehalose (T1) and HB (T2) followed by warming protocol, oocytes subjected to in vitro maturation (IVM). Oocytes viability were evaluated by fluorescein diacetate staining. Results showed ovarian growth for first session was larger size follicles than the second session for both cattle. Total number of oocytes obtained were 60. Oocytes viability treatment T2 was significantly higher (90.9%) than T1 (70.4%). This study concludes that HB as CP in vitrification protocol was able to achieved high oocytes viability with oocytes derived via OPU suggesting Honeybee as an alternative CP for oocytes vitrification.
Effects of pickling steps on antioxidant activity of guava
Authors: Ramli N S , Mohamad Saadon N R 
Published: May 2021

Abstract
Pickling has been used for centuries to increase the shelf life of foods. Pickling of fruit involves several steps including washing and salting. This processing may affect the retention of antioxidant compounds. The consumption of antioxidant-rich fruits has been associated with reduce the risk of oxidative stress-related diseases. However, there is limited information available on the antioxidant activity of fruits during the pickling steps. Therefore, the study is conducted to determine the ascorbic acid content (AA), total phenolic content (TPC), total flavonoid content (TFC), and antioxidant properties using ferric reducing power (FRAP) and 1,1-diphenyl-2-picrylhydrazyl radical scavenging activity (DPPH) assays during the pickling process (salting, washing, and pickling) of guava. The results showed that guava pickle showed a higher amount of TPC and TFC, but lower AA (p<0.05) in comparison to the fresh guava. There were no differences in the antioxidant activities of pickled and fresh guava. Similarly, salting and washing did not significantly change the AA, TPC, TFC, and antioxidant properties of the samples (p>0.05). Findings from the present study revealed that guava pickle could be a good source of antioxidant polyphenols. Further study is needed to identify the phenolic compounds responsible for antioxidant activity.
Storage stability of sweet corn (Zea mays var saccharata Bailey) jam: effect of sugar to inulin ratios on physicochemical, ascorbic acid, β-carotene and sensory characteristics
Authors: Zainol M K , Cheang L N , Zuraidah N , Yahya F , Zin Z M 
Published: May 2021

Abstract
This study aimed to investigate the effect of different concentrations of inulin on the properties of sweet corn jam from Zea mays var saccharata Bailey during storage. Six different formulations of sweet corn jam (4.5%, 9%, 13.5%, 18% and 22.5% inulin) along with control samples (0% inulin) were prepared. Physical properties including water activity, total soluble solids, pH, firmness, spreadability and colour analysis together with proximate analysis, ascorbic acid and β-carotene composition were evaluated in 4 weeks of storage. Sensory acceptability test of the samples on colour, spreadability, taste and overall acceptability was carried out. Results showed that addition of inulin in sweet corn jam significantly affecting (p<0.05) the water activity, L* value and texture quality. Inulin could be added up to 9 % without significantly affecting (p<0.05) the acceptance of colour and taste of sweet corn jam. Comparative study was done on control and 9 % of inulin added sweet corn jam. Sample with 9.0% of inulin gave significantly higher (p<0.05) moisture and ash content. However, samples with 9.0% of inulin gave significantly lower (p>0.05) carbohydrate and β-carotene content. This study shows that inulin is not only good as prebiotic but has the potential to replace sugar added into healthy food products such sweet corn jam, since it could improve the nutritional quality of sweet corn jam with satisfying sensory acceptance.
Form Finding Architectural Shading Device: Reinterpretation of Batik Pattern through Parametric Approach
Authors: Jati Esti Setyaning , Hariyadi Agus 
Published: May 2021

Abstract
The use of technology is a big opportunity to explore architectural design. This research examines the possibility of form-finding process by using computational design approach to generate shading devices that can represent local identity and provide efficient energy use of the building. Some examples of geometric Batik patterns found on the local screen used in one of the Indonesian traditional houses will be transformed into perforated shading devices. The process consists of three stages: understanding the symmetry group of each pattern with crystallographic chart analysis, generating a digital mesh of the objects by using photogrammetry method, and reinterpreting the object mesh to the perforated panel using parametric approach. The result shows that Banji pattern on p4gm symmetry group, while Kawung pattern on p4mm, Parang pattern on p1, and Nitik pattern on c2mm. On the photogrammetric stage, the digital three-dimensional meshes are successfully formed by using 13-19 overlapping photographs of the objects. From the last stage, perforated batik pattern panels are generated and it is possible to set the perforation percentage to reach desired WWR value. This experiment indicates that the use of computational design is possible to develop the local ornaments into a controllable perforated shading device.