Nitrogen-15 Determination in Tissues of Laying Hens Fed on Different Levels of $^{15}N-Chlorocholine$ Chloride ($^{15}N-CCC$) Diets

Nurhayati, Nurhayati,Thinggaard, Grete,Chakeredza, S.,Reineking, A.,Langel, R.,ter Meulen, U. Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.3

An experiment was conducted to determine the distribution of nitrogen-15 in tissues of laying hens receiving different levels of $^{15}N$-CCC in diets. Twenty brown laying hens were divided into four groups and randomly assigned into one of four dietary treatment groups consisting of 0, 5, 50 and 100 ppm $^{15}N$-CCC inclusion. The hens were individually fed with the $^{15}N$-CCC diets in battery cages for 11 days and then all hens restored to feeding on the control diet for 7 days. After eleven days, eight hens were slaughtered, and the others were slaughtered seven days after $^{15}N$-CCC diets withdrawal. Samples of blood, liver, heart and meat were collected and their $^{15}N$ contents were determined. The ${\delta}^{15}N$ excess (${\delta}^{15}N$-ex) and atom percentage excess in $^{15}N$ were calculated. The ${\delta}^{15}N$-ex and atom percentage excess $^{15}N$ increased significantly (p<0.05) with increasing levels of $^{15}N$-CCC in diets in all tissues after feeding $^{15}N$-CCC diets for eleven days. The highest concentration of ${\delta}^{15}N$-ex and atom percentage excess $^{15}N$ were detected in blood, followed in order by liver, heart and thigh meat. The concentrations reduced significantly (p<0.05) after $^{15}N$-CCC diets were withdrawn. Comparison between treatment groups showed that ${\delta}^{15}N$-ex and atom percentage excess $^{15}N$ were still higher in hens that had been fed diets with higher levels of $^{15}N$-CCC. This study showed that nitrogen-15 was distributed in blood, liver, heart and meat of laying hens.

클러스터에 기반한 에너지 효율적 삼각모양 라우팅 프로토콜에 관한 연구

누루하야티(Nurhayati Nurhayati),이경오(Kyung-Oh Lee) 한국컴퓨터정보학회 2011 韓國컴퓨터情報學會論文誌 Vol.16 No.9

무선 센서 네트워크는 제한된 에너지를 갖는 배터리에 의해 가동되며 한번 배치되면 사용자가 접근할 수 없고 배터리 교환이 불가능하다. 따라서 네트워크의 수명을 늘리기 위하여 네트워크 디자인 시에 에너지 효율성이 매우 중요하게 고려되어야 한다. BCDCP 기법에서는 모든 센서가 CH(클러스터 헤드)로 데이터를 보내고 CH는 BS(베이스 스테이션)로 취합된 데이터를 송신하는 효율적 클러스터링 프로토콜이지만 규모가 큰 네트워크에서는 적합하지 않으며 노드들의 물리적 위치를 고려하지 않기 때문에 효율성이 떨어진다. UCR 기법의 경우 BS에와 노드들의 거리만을 고려하기 때문에 BS에 가까운 노드가 빨리 죽는 문제가 있다. 본 논문에서는 균형된 에너지 소비를 통하여 네트워크 수명을 늘리기 위한 삼각모양 클러스터 라우팅 프로토콜(TSCRP- Triangular Shape Cluster Routing Protcol)을 제안한다. 본 기법은 비교적 간단하게 운영되기 때문에 헤드 선출에 필요한 오버헤드가 적고 센서들의 에너지 보유량뿐만이 아니라 센서들과 BS간의 거리를 유기적으로 결합하여 리더 노드를 선정하기 때문에 다른 기법에 비해 효율적이다. 실험에 의하면 TSCRP가 LEACH, BCDCP, UCR보다 우수한 것으로 나타났다. In this paper, we propose an efficient dynamic workload balancing strategy which improves the performance of high-performance computing system. The key idea of this dynamic workload balancing strategy is to minimize execution time of each job and to maximize the system throughput by effectively using system resource such as CPU, memory. Also, this strategy dynamically allocates job by considering demanded memory size of executing job and workload status of each node. If an overload node occurs due to allocated job, the proposed scheme migrates job, executing in overload nodes, to another free nodes and reduces the waiting time and execution time of job by balancing workload of each node. Through simulation, we show that the proposed dynamic workload balancing strategy based on CPU, memory improves the performance of high-performance computing system compared to previous strategies.

BIODISTRIBUTTON OF BONE IMAGING KITS STERILIZED BY GAMMA RADIATION

Nurhayati, T.,Sutomo, F. X.,Basri, T. H.,Djajusman, S.,Santoso, D. 대한핵의학회 1984 핵의학 분자영상 Vol.18 No.1

INTERNAL RADIATION EFFECT OF Na 131I ON SPERMATOGENESIS AND FERTILITY OF MALE WHITE MICE

Nurhayati, T.,Sutasurya, Lien A.,Sutomo, F. X.,Sudarwati, Sri 대한핵의학회 1984 핵의학 분자영상 Vol.18 No.1

A New Measure of Asset Pricing: Friction-Adjusted Three-Factor Model

NURHAYATI, Immas,ENDRI, Endri Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.12

In unfrictionless markets, one measure of asset pricing is its height of friction. This study develops a three-factor model by loosening the assumptions about stocks without friction, without risk, and perfectly liquid. Friction is used as an indicator of transaction costs to be included in the model as a variable that will reduce individual profits. This approach is used to estimate return, beta and other variable for firms listed on the Indonesian Stock Exchange (IDX). To test the efficacy of friction-adjusted three-factor model, we use intraday data from July 2016 to October 2018. The sample includes all listed firms; intraday data chosen purposively from regular market are sorted by capitalization, which represents each tick size from the biggest to smallest. We run 3,065,835 intraday data of asking price, bid price, and trading price to get proportional quoted half-spread and proportional effective half-spread. We find evidence of adjusted friction on the three-factor model. High/low trading friction will cause a significant/insignificant return difference before and after adjustment. The difference in average beta that reflects market risk is able to explain the existence of trading friction, while the difference between SMB and HML in all observation periods cannot explain returns and the existence of trading friction.

The Effect of Customer and Competitor Market Sensing Capability on Business Performance of SMEs: An Empirical Study in Indonesia

Tatiek NURHAYATI,Hendar HENDAR 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.8

The purpose of this study is to investigate and examine the role of specialized marketing capabilities (SMC) in mediating the relationship between customer sensing capability (CuSC) and competitor sensing capability (CoSC) with business performance (BP) at SMEs retail fashion in Indonesia. This study used 330 SMEs from ten regencies in Indonesia and examined the regression relationship between the four variables, SMC, CuSC, CoSC, and BP. Confirmatory factor analysis (CFA) was used to measure the validity and reliability of the construct used. For data analysis techniques, this study used structural equation modeling (SEM) with AMOS Version 22.0. This study found that SMC acts as a partial mediator in the relationship between CuSC and CoSC with SMC and BP. By examining the diverse literature on market sensing capability, marketing strategy, and BP, this study offers a unique analysis of market learning and its effects on SMC and BP in Retail Fashion SMEs in Indonesia. Furthermore, future research needs to broaden the findings and improve generalizations by conducting studies of SMEs in other industries, such as manufacturing, and services of small, medium and large scale. In addition, it needs to add some countries as research objects, not only Indonesia.

광역 WSN 을 위한 클러스팅 트리 라우팅 프로토콜

누루하야티 ( Nurhayati ),최성희 ( Sung Hee Choi ),이경오 ( Kyung Oh Lee ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.1

무선센서네트워크는 여러 분야에 사용되고 있으며 그 특성상 에너지를 효율적으로 사용할 수 있도록 설계되어야 한다. 무선 센서들은 한 번 설치되면 다시 교환할 수 없으며 제한된 배터리를 활용하여 운영된다. 따라서 네트워크 수명을 늘리기 위해서는 이러한 센서들의 효율적 활용이 필수적이다. BCDCP 에서는 CH(클러스터 헤드)가 BS(베이스스테이션)에 모든 데이터를 전송한다. BCDCP는 적은 규모의 네트워크에서는 잘 동작하지만 큰 규모에서는 무선 통신을 위한 에너지 소모가 많아 적절하지가 았다. TBRP 는 큰 규모의 네트워크에서는 잘 동작하지만 다중 홉 전송에 따는 에너지 고갈 현상이 빨리 발생한다. 본 논문에서는 균형화된 에너지 소모를 통해 네트워크 수명을 늘리기 위한 기법인 CETRP 를 제안하였다. CETRP 는 클러스터 헤드를 트리구조로 선정하여 에너지 효율을 극대화하였으며 다른 기법과 성능을 비교하였다. Wireless sensor network are widely all over different fields. Because of its distinguished characteristics, we must take account of the factor of energy consumed when designing routing protocol. Wireless sensor networks consist of small battery powered devices with limited energy resources. Once deployed, the small sensor nodes are usually inaccessible to the user, and thus replacement of the energy source is not feasible. Hence, energy efficiency is a key design issue that needs to be enhanced in order to improve the life span of the network. In BCDCP, all sensors sends data from the CH (Cluster Head) and then to the BS (Base Station). BCDCP works well in a smallscale network however is not preferred in a large scale network since it uses much energy for long distance wireless communication. TBRP can be used for large scale network, but it weakness lies on the fact that the nodedry out of energy easily since it uses multi-hops transmission data to the Base Station. Here, we proposed a routing protocol - A Cluster Based Energy Efficient Tree Routing Protocol (CETRP) in Wireless Sensor Networks (WSNs) to prolong network life time through the balanced energy consumption. CETRP selects Cluster Head of cluster tree shape and uses maximum two hops data transmission to the Cluster Head in every level. We show CETRP outperforms BCDCP and TBRP with several experiments.

무선 센서 네트워크에서 삼각 클러스터링 라우팅 기법

누루하야티 ( Nurhayati ),이경오 ( Kyung Oh Lee ),최성희 ( Sung Hee Choi ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.2

무선 센서 네트워크는 한정된 에너지 자원과 전원 공급 장치, 그리고 소형 배터리로 구성되어 있다. 센서 노드는 설치가 되면 사용자가 다시 접근할 수 없고 에너지 소스의 배포 및 교체가 가능하지 않다. 따라서, 네트워크의 수명 향상을 위해서는 에너지효율성이 네트워크 디자인의 핵심 요소가 된다. BCDCP 에서는 모든 센서는 CH (클러스터 헤드)로 데이터를 보내며 CH 는 BS(베이스 스테이션)로 이를 전송한다. BCDCP 는 소규모 네트워크에서는 잘 작동하지만 대규모 네트워크에서는 장거리 무선 통신을 위해 많은 에너지를 사용하기 때문에 적합하지 않다. 본 논문에서는 균형 잡힌 에너지 소비를 통해 네트워크 수명을 연장할 수 있는 삼각형 클러스터링 라우팅 프로토콜(TCRP)을 제안하였다. TCRP 는 삼각 모양으로 클러스터 헤드를 선택한다. 센서 필드는 에너지 레벨을 기준으로 지역을 나누게 되며 나뉘어져 있으며 모든 레벨에서 게이트 노드를 하나 선택하여 이 노드가 그 레벨내에 있는 노드들의 데이터를 수집하고 리더 노드로 보낸다. 마지막으로 리더 노드가 BS 로 집계된 데이터를 보낸다. TCRP 는 몇 가지 실험을 통하여 BCDCP 보다 훌륭한 성능을 보여주었다. Wireless sensor networks consist of small battery powered devices with limited energy resources. Once deployed, the small sensor nodes are usually inaccessible to the user, and thus replacement of the energy source is not feasible. Hence, energy efficiency is a key design issue that needs to be enhanced in order to improve the life span of the network. In BCDCP, all sensors send data from CH (Cluster Head) and then to BS (Base Station). BCDCP works well in small-scale network but in large scale network it is not appropriated since it uses much energy for long distance wireless communication. We propose a routing protocol - Triangular Clustering Routing Protocol (TCRP) - to prolong network life time through the balanced energy consumption. TCRP selects cluster head of triangular shape. The sensor field is divided into energy level and in every level we choose one node as a gate node. This gate node collects data and sends it to the leader node. Finally the leader node sends the aggregated data to the BS. We show TCRP outperforms BCDCP with several experiments.

Effects of potassium and carbon addition on bacterial algae bioremediation of boezem water

Indah Nurhayati,Rhenny Ratnawati,Sugito 대한환경공학회 2019 Environmental Engineering Research Vol.24 No.3

Bioremediation of bacterial algae is one of wastewater treatment by utilizing symbiosis of bacterial algae, which is relatively inexpensive and safe for the environment. The aims of this research were: (1) to investigate initial characteristic of boezem water of Kalidami Surabaya, (2) to investigate the effect of potassium (K) element and carbon source addition toward the reduction of NH₃-N content and organic matter in KMnO₄ of boezem water. The research conducted in a laboratory in batches without adding aeration. The initial stage of this research was conducting alga culture until it was obtained chlorophyll-a algae concentration of 3.5 ± 0.5 ㎎/L. The best result of range finding test was a comparison of boezem water volume with algal which were about 25%:75%. The research conducted in duplo over 18 d. The result of the research can be concluded that boezem water of Kalidami Surabaya for the parameter of pH, temperature, NH₃-N, dissolved oxygen, chemical oxygen demand, biological oxygen demand, and number of KMnO₄ show that it enables to do bioremediation of bacterial algae. Decrease efficiency occurred in a reactor with the addition of element K 3% and source C. NH₃-N and KMnO₄ final content 0.164 ㎎/L and 30 ㎎/L, respectively.

Software Quality Assurance – E-commerce Customers Satisfaction in Requirements Engineering Process

Wan Nurhayati Wan Ab. Rahman,Asma’ Badrul Kamal,Hazliana Talha,Bunjo Josiah,Lawal Adamu,Wu Liming,Nur Sakinah Mohd Rosli 보안공학연구지원센터 2015 International Journal of Software Engineering and Vol.9 No.3

In the requirement analysis phase, good quality requirements are needed to develop the foundation of good quality software. This paper proposes quality attributes from the SQA activities in requirement phase from the end users’ perspective in an e-commerce application. By analyzing SQA activities in requirement engineering process, we found out five quality attributes that most affect customer’s satisfaction: functionality, security, usability, reliability and efficiency. This paper describes the quality attributes that are gained from the requirements elicitation, requirements documentation, requirements validation, negotiation and the requirements management planning activities. The results show that functionality, security, usability, reliability and efficiency affect e-commerce customers’ satisfaction. Most of the online shopping websites comply with customer requirement and requirement expectations.