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A Transport Layer Protocol for Uplink WiMAX Video Streaming
Suherman Suherman,Marwan Al-Akaidi,Naemah Mubarakah 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.1
There are many ways to improve unreliable datagram protocol (UDP) for video streaming applications. One of them is by using negative acknowledgement (NACK). This paper proposed UDP enhancement by using both NACK-based retransmission and medium access (MAC) layer support for uplink video streaming application in WiMAX networks. Mathematical models and analysis are presented to compare protocol performances in relation to delay and packet loss. The analysis is then confirmed through simulations using the ns-2 simulator. The results show that by reducing the number of NACK packets within one video frame and utilizing MAC support could reduce effective loss rate and delay significantly.
Sitti Rahmawati,Yassaroh Yassaroh,Melvina Theodora,Tahril Tahril,Afadil Afadil,Tri Santoso,Suherman Suherman,Yuli Nurmayanti 한국식품영양과학회 2024 Preventive Nutrition and Food Science Vol.29 No.2
Edible films are thin films frequently manufactured using natural bioresources and are employed in food packaging to safeguard food quality. This research prepared edible films from renewable biomass consisting of Belitung taro tuber starch (Xanthosoma sagittifolium) and incorporated sorbitol as a plasticizer, carboxymethyl cellulose as a reinforcing agent, and moringa leaf extract (Moringa oleifera) as an antioxidant. The physicochemical characteristics of the resulting edible films were examined. The most favorable treatment was identified in an edible film containing 3% (v/v based on the total volume of 100 mL) of moringa leaf extract. This exhibited a tensile strength of 6.86 N/㎟, percent elongation of 73.71%, elasticity of 9.37×10<SUP>−3</SUP> kgf/㎟, water absorption of 349.03%, solubility of 93.18%, and water vapor transmission speed of 3.18 g/h ㎡. Its shelf life was five days at ambient temperature. The edible film was found to have 135.074 ppm of half maximal inhibitory concentration (IC<SUB>50</SUB>) based on the antioxidant analysis of inhibition concentration (IC<SUB>50</SUB>) value measurements, and was classified as having moderate antioxidant activity. Additionally, the biodegradability assessment revealed that the edible films degraded within 14 days. Based on this data, it can be deduced that adding moringa leaf extract enhances the physicochemical and functional characteristics of the film. These edible films can be used as substitutes for nonrenewable and nonbiodegradable packaging materials.
Aryuni Yuliantiningsih,Ade Maman Suherman,Noer Indriati,Wismaningsih,Baginda Khalid Hidayat Jati,Kartono 이준국제법연구원 2023 Journal of East Asia and International Law Vol.16 No.2
The legal status of Biodiversity Beyond National Jurisdiction (BBNJ) has been regulated through the High Seas Treaty as a common heritage of humankind. However, there still exist problems related to overlapping areas above the Extended Continental Shelf (ECS). In such areas, a significant continental shelf would fall within national jurisdiction, whereas the water column would be under the regime of the high seas, and BBNJ would be the common heritage of humankind. We argue that, in order to address the overlapping of areas within the superjacent waters in the ECS, a given sui generis status is required, so that the coastal state has a sovereign right to conserve the BBNJ in these areas. This study concludes that the sui generis arrangement should be implemented in the context of an overlapping ECS and its water column. The efforts of the Indonesian government to extend the continental shelf beyond 200 nautical miles constitute an important step in preserving natural resources for future generations.
Fitria Ekawati Wulandari,Suherman,Tri Handoyo,김경민,Bambang Sugiharto 한국작물학회 2021 Journal of crop science and biotechnology Vol.24 No.1
The transgenic sugarcane overexpressing SoSPS1 gene increased sugar content which may alter the root exudation that interact with soil rhizosphere microorganism. The microbial plays an important role in biochemical cycling and nutrient transformation in the soil. Therefore, it is important to investigate the potential risk of the transgenic sugarcane on soil ecosystem. This study is designed to evaluate the impact of overexpressing gene for sucrose-phosphate synthesis ( So SPS1) on the bacterial diversity, enzyme activity and nutrient contents. The transgenic sugarcane showed no signifi cant difference in the population of culturable bacteria in the soil rhizosphere compared to non-transgenic counterpart. The populations of total, nitrogen-fixing and phosphate-solubilizing bacteria were similar in transgenic and non-transgenic sugarcane, although the bacterial population tends to increase at later sugarcane growth stage may due to the rise in nutrition from the root exudation. The PCR analysis showed no detection of horizontal gene fl ow in the bacteria. However, urease activity was significantly decreased in the transgenic sugarcane concomitant with lower nitrogen content in the soil rhizosphere at a later growth stage might due to the transgenic sugarcane lines increased nitrogen absorption for higher growth rate. Furthermore, the nutrient contents, such as organic carbon, phosphorus, potassium, magnesium and calcium, slightly varied in the soil rhizosphere but did not affected by the transgenic sugarcane. The results suggested that the transgenic sugarcane overexpressing SoSPS1 gene may not aff ect the bacterial diversity, nutrient contents and soil ecosystem.
Widiatmaka F PAMBUDI,Wahdiana DIAN,Suherman,Samodro Bintang A,M LEONARDUS,Sukrisno 한국유통과학회 2022 유통과학연구 Vol.20 No.4
Purposes: The purpose of this study is to develop and test a possible model that investigates the relationships between green investment, CSR disclosure, social collaboration initiatives, and firm distribution performance to deal with environmental change because it’s become the major stakeholder since it affects increasingly global company performance index. Research methodology: In this study a quantitative method was adopted. The 220 respondents were owners and managers of manufacturing enterprises from Indonesia. The structural equation model (SEM) was used to test the hypotheses, and the Partial Least Square (SmartPLS) was used as the data analysis tool. Findings: The study’s finding shows that green investment has a significant effect on CSR disclosure, and CSR disclosure has a positive relationship with social collaborative initiatives and the firm’s distribution performance. Similarly, social collaborative initiatives also significantly impact a firm’s distribution performance. Limitations: This study uses variables that are still abstract and have not been able to regress the dimensions contained there into conclusion variables for each antecedent variable. In addition, this study only used a sample with a small scope, namely Central Java Province, Indonesia. Contribution: The findings of this study contribute to the body of literature in the field of organizational management and support the agency and stakeholder theories. For the practical contribution, this study provides the way to build and implement green-based investment strategies as a competitive edge and improve firm’s distribution performance.
Wahyu Widowati,Lusiana Darsono,Jo Suherman,Nurul Fauziah,Maesaroh Maesaroh,Pande Putu Erawijantari 한국생약학회 2016 Natural Product Sciences Vol.22 No.3
Inflammation plays an important role in host defense against external stimuli such as infection by pathogen, endotoxin or chemical exposure by the production of the inflammatory mediators that produced by macrophage. Anti-inflammatory factor is important to treat the dangers of chronic inflammation associated with chronic disease. This research aims to analyze the anti-inflammatory effects of Garcinia mangostana L. peel extract (GMPE), a-mangostin, and g-mangostin in LPS-induced murine macrophage cell line (RAW 264.7) by inhibiting the production of inflammatory mediators. The cytotoxic assay of G. mangostana L. extract, a-mangostin, and g-mangostin were performed by MTS (3-(4,5-dimethylthiazol-2-yl)-5-(3-carboxymethoxyphenyl)-2-(4-sulfophenyl)-2H-tetrazolium) to determine the safe and non-toxic concentration in RAW 264.7 for the further assay. The concentration of inflammatory mediators (COX-2, IL-6, and IL-1b) were measured by the ELISA-based assay and NO by the nitrate/nitrite colorimetric assay in treated LPS-induced RAW 264.7 cells. The inhibitory activity was determined by the reducing concentration of inflammatory mediators in treated LPS-induced RAW 264.7 over the untreated cells. This research revealed that GMPE, a-mangostin, and g-mangostin possess the anti-inflammatory effect by reducing COX-2, IL-6, IL-1b, and NO production in LPS-induces RAW 264.7 cells.