Articles

Access the latest knowledge in applied science, electrical engineering, computer science and information technology, education, and health.

Advanced Search
Filter Icon

Filters article

Years

FAQ Arrow
Single Year
Range Year
0
0

Source Title

FAQ Arrow

Authors

FAQ Arrow

28,451 Article Results

Supervised Entity Tagger for Indonesian Labor Strike Tweets using Oversampling Technique and Low Resource Features

10.12928/telkomnika.v14i4.3876
Ayu; Bandung Institute of Technology Purwarianti , Lisa; Vienna University of Technology Madlberger , Mochammad; University of Indonesia Ibrahim
We propose an entity tagger for Indonesian tweets sent during labor strike events using supervised learning methods. The aim of the tagger is to extract the date, location and the person/organization involved in the strike. We use SMOTE (Synthetic Minority Oversampling Technique) as an oversampling technique and conducted several experiments using Twitter data to evaluate different settings with varying machine learning algorithms and training data sizes. In order to test the low resource features, we also conducted experiments for the system without employing the word list feature and the word normalization. Our results indicated that different treatment of different types of machine learning algorithms with low resource features can lead to a good accuracy score. Here, we tried Naïve Bayes, C4.5, Random Forest and SMO (Sequential Minimal Optimization) algorithms using Weka as the machine learning tools. For the Naïve Bayes, due to the data distribution based of the class probability, the best accuracy was achieved by removing data duplication. For C4.5 and Random Forest, SMOTE gave higher accuracy result compared to the original data and the data with data duplication removal. For SMO, there is no significant difference among various sizes of training data.
Volume: 14
Issue: 4
Page: 1462-1471
Publish at: 2016-12-01

Planning and Coordination in Hierarchies of Intelligent Dynamic Systems

10.12928/telkomnika.v14i4.4997
Alexander Yakovlevich; Kola Science Centre of the Russian Academy of Sciences Fridman
On the basis of the known principle of interactions prediction (Mesarovic), our earlier proposed incremental coordination principle is extended over hierarchical collectives of intelligent dynamic systems (IDSs) after Gennady Osipov. Such systems admit arbitrary types of variables in their state vector and thereby allow investigating more general dynamic systems than “classical” ones defined in numerical state spaces. Using the concept of effective N-attainability (Osipov), a straightforward procedure of planning for hierarchical collectives of IDS is developed. As soon as a plan for reaching a goal state from the current one is found, effective implementation of this plan requires for coordination of IDSs taking their parts in the collective. We consider both aspects of coordination (coordinability with respect to the coordinator’s task and coordinability in relation to the global task) and infer necessary conditions of the coordinability for a locally organized hierarchy of IDSs.
Volume: 14
Issue: 4
Page: 1408-1416
Publish at: 2016-12-01

Energy Efficient Error Rate Optimization Transmission in Wireless Sensor Network

10.12928/telkomnika.v14i4.4013
Sharada K; JJT University, Rajasthan A , Siddaraju; Dr. Ambedkar Institute of Technology, Visvesvaraya Technological University (VTU) Siddaraju
Wireless Sensor Network is a collection of independent nodes and create a network for monitoring purposes in various scenarios like military operation, environmental operation etc. WSN network size is increasing very rapidly these days, due to large network size energy consumption is also increased and it has small battery, lifetime of network   decreases due to early death of nodes and it impact the overall system performance. Clustering is a technique for enhance the network lifetime in WSN. Here in this paper we propose a new multi-objective adaptive swarm optimization (MASO) technique for clustering and computes the maximum number of clusters, which is best suited for the network. Each cluster has cluster head and cluster members and performed the task of local information extraction. Cluster head gathers all the extracted information from member nodes and send it to the base station, where base station performed global information extraction from all the cluster head nodes and generate some useful result. In MASO technique, object is used to find the best global position for the node and compare with existing position value. If new value is better than the old value, than node moves to a new position and object update their table for this new position. We are considering error probability in transmission of data packet in one hop communication. Here obtained the results are compared with other research in terms of overall network lifetime and effect on network lifetime when the size of the network is changed. We have fine tuned the node’s decay rate and throughput of the network.
Volume: 14
Issue: 4
Page: 1368-1375
Publish at: 2016-12-01

Implementation and Analysis of Reversible logic Based Arithmetic Logic Unit

10.12928/telkomnika.v14i4.3230
Shaveta; Manav Rachna International University Thakral , Dipali; Manav Rachna International University Bansal , S.K.; EX-Manav Rachna International University Chakarvarti
There is a tremendous growth in fabrication from small scale integration (SSI) to giant scale integration (GSI). It however raises a question of sustainability of Moore's law due to almost intolerable levels of power consumption. Researchers have invented a lot of methods to reduce power consumption and recent technologies are switching to reversible logic. Reversible logic has various applications in fields of computer graphics, optical information processing, quantum computing, DNA computing, ultra low power CMOS design and communication. Arithmetic Logic Unit (ALU) is considered to be the basic building block of a CPU in the computing environment and portability in computing system highly demands reversible logic based ALU. Modern processors usually have a word length of 32 or 64 bits. Divide and conquer approach principle cascades n number of 1 bit ALU to implement n bit ALU. Several researchers have proposed 1-bit ALU design using various reversible logic gates. This paper aims at categorizing various ways of implementation in VHDL using Xilinx ISE design suit 14.2 tool and comparative analysis of existing 1 bit ALU designs in terms of optimization metrics like power consumption, number of gates, number of constant inputs, number of garbage outputs and quantum cost. ALU realized using carry save adder block is found to be most optimum design in terms of gate count and quantum cost.
Volume: 14
Issue: 4
Page: 1292-1298
Publish at: 2016-12-01

Binary LDPC Codes Decoding Algorithm Based on MRF and FPGA Implementation

10.12928/telkomnika.v14i4.4158
Zhongxun; Yantai University Wang , Wenqiang; Yantai University Wu
The improved LDPC code decoding algorithm mainly refereed to improving decoding performance or reducing the decoding computation complexity. No matter hard decision or soft decision LDPC code decoding algorithm, we can get all ring number by one test, instead of testing each long ring number, after optimizing ring detection algorithm. We putted forward the application of Gaussian Markov Random Field model to realize the source parameter estimation, and make logarithmic likelihood ratio correction of bit sequence received by the channel decoding end. Joining source residual redundancy information to increase the decoder error correction ability. Source estimation adaptive variable can correct coefficient, and it was regulated by error rate. Under the condition that computational complexity increasedlittlely, the LDPC code decoding algorithm based on MRF effectively improved the decoding performance and implemented the improvement of LDPC code decoding algorithm .In the end, we realized the decoding algorithm by using FPGA.
Volume: 14
Issue: 4
Page: 1383-1389
Publish at: 2016-12-01

Research on Identification Method of Anonymous Fake Reviews in E-commerce

10.12928/telkomnika.v14i4.3654
Lizhen; Capital Normal University Liu , Xinlei; Capital Normal University Zhao , Hanshi; Capital Normal University Wang , Wei; Capital Normal University Song , Chao; Capital Normal University Du
In this paper, a new method has been proposed for identifying anonymous fake reviews generated by click farmers in E-commerce and improves the identification rates. Anonymous fake reviews are different from the gunuine reviews. They could be distinguished based on the credibility of users, the average daily number of evaluations, the content similarity, and the degree of word overlapping. The proposed method takes into account these 5 features to calculate the fake reviews content by constructing multivariate linear regression model, Experiments show that this prelimilnary work performed well in identifying fake reviews in Chinese E-commerce website. The extracted features are also useful to identifying the fake reviews when the reviewer’s identification is not accessable.
Volume: 14
Issue: 4
Page: 1510-1520
Publish at: 2016-12-01

Multi Features Content-Based Image Retrieval Using Clustering And Decision Tree Algorithm

10.12928/telkomnika.v14i4.4646
Kusrini; STMIK AMIKOM Yogyakarta Kusrini , M. Dedi; STMIK AMIKOM Yogyakarta Iskandar , Ferry; STMIK AMIKOM Yogyakarta Wahyu Wibowo
The classification can be performed by using the decision tree approach. Previous researches on the classification using the decision tree have mostly been intended to classify text data. This paper was intended to introduce a classification application to the content-based image retrieval (CBIR) with multi-attributes by using a decision tree. The attributes used were the visual features of the image, i.e. : color moments (order 1, 2 and 3), image entropy, energy and homogeneity. K-means cluster algorithm was used to categorize each attribute. The result of categorized data was then built into a decision tree by using C4.5. To show the concept in application, this research built an application with main features, i.e.: cases data input, cases list, training process and testing process to do classification. The resulting tests of 150 rontgen data showed the training data classification’s truth value of 75.33% and testing data classification of 55.7%.
Volume: 14
Issue: 4
Page: 1480-1492
Publish at: 2016-12-01

The Role of Village Surveillance Officer to Prevent Dengue Hemorrhagic Fever

10.11591/ijphs.v5i4.4847
Sunarsih Sunarsih , Kuntoro Kuntoro , Chatrin U.W , Nugroho Susanto
Dengue is a major public health problem in Indonesia. The program of elimination of mosquito breeding places is still low. This study was aimed to analyze the effectiveness of village surveillance officer for decrease container index. Study design was quasy experiment. The intervention included: community workshops; community involvement in clean-up campaigns; and distribution of information, education and communication materials in the village surveillans officer. Data were analyzed with t test, and path way analyzed. There is significantly differences knowdlege, attitude, behaviour, sanitation, and container index p<0.05. Based on the path analysis was concluded that village surveillance officer increased knowledge, attitude, behavior, sanitation and container index.Surveillance village officer is concluded to be more effectively decreased of larva index through comunity behavior. Surveillance village officer is important because it effectively the coverage of larva index through community behaviour participation.
Volume: 5
Issue: 4
Page: 433-436
Publish at: 2016-12-01

The Support to Improve Self Efficacy and Healing of Drugs Addict

10.11591/ijphs.v5i4.4830
Rosdiana Rosdiana , Bhisma Murti , Mahendra Wijaya , Suwarto Suwarto
Appropriate counseling and education can be adopted to achieve a change in attitude, knowledge and perception. Still there is a wrong perception of a given intervention. Peer support through a process of social learning, the process of growing understanding of how to process information from experience, observational include: attention (attention), given (retention), reproduction of motion (reproduction), motivation (motivation), and communication. The purpose of this study was to analyze resident self-efficacy to regardless of drug addiction through family support. This study employed qualitative approach with case study design. Subjects in this study were residents, ex drugs user, peer support, and resident family. The results showed that peer support from fellow residents and the support of the major on duty (MOD) very meaningful and helpful for resident in the healing process.
Volume: 5
Issue: 4
Page: 359-366
Publish at: 2016-12-01

Environmental Health Risk Analysis of Paraquat Exposure in Palm Oil Plantations

10.11591/ijphs.v5i4.4852
Maksuk Maksuk , Tan Malaka , Suheryanto Suheryanto , Abu Umayah
Paraquat (1, 1’-dimethyl-4, 4’-bipyridylium dichloride) is a highly toxic herbicide. Recently, Paraquat is still used widely in the plantations area, mainly in palm oil plantations. Paraquat application continuously can be increased Paraquat concentration and contaminated in soil and water. This study aimed was to analysis Paraquat exposure in environmental media water and soil, and the calculation of risk quotient of Paraquat in palm oil plantation. The study design of this research was a cross sectional with the laboratory examination Paraquat concentrations in soil and water. Soil and water samples taken by grab sampling with random composites. Water samples were taken from three sources in palm oil plantations area. Whereas soil samples were taken at a depth of 0-10 cm (top soil) and the number of soil samples as much as 5 samples. Furthermore, the risk quotient of Paraquat concentration in the water used in the palm oil plantation. The laboratory tests of Paraquat concentration were in water and soil with gas chromatography. The results of laboratory tests showed that Paraquat concentration in water samples were found between <0.005 to 0.01 mg/l and Paraquat concentration in soil samples were found between <0.005 to 0.08 ppm. The calculation of risk quotient was 0.058 mg/body weight/day. Although, the calculated of risk quotient showed less than one. Therefore, prior to use the water must be treatment first. While the recommended water to consumption as much as 2 liters/day for a 55 kg body weight to Indonesian workers.
Volume: 5
Issue: 4
Page: 465-469
Publish at: 2016-12-01

Determinants Levels of Urinary 8-Hydroxydeoxyguanosine among Chromium Electroplating Workers

10.11591/ijphs.v5i4.4845
Yuliani Setyaningsih , Indwiani Astuti , Adi Heru Husodo
Electroplating workers were exposed by particulate and fog of chromium from electrolysis process during work. Chromium is highly carcinogenic when inhaled.  Chromium can be reduced in the cells in the body. This process may generate Reactive Oxygen Species (ROS) causing lipid peroxidation and oxidative DNA damage. This research was aimed to analyse the influence of chromium to the levels of urinary 8-OHdG as an indicator to support early diagnosis of occupational disease. 66 electroplating workers in Tegal District were taken purposively as samples for this research. There were association between chromium level in urine, malondialdehyde (MDA) level, Body Mass Index, smoking habit, alcohol and supplement drink consumption and urinary 8-OHdG (p<0.05). There was not association between BMI and urinary 8-OHdG (p>0.05). Multivariate analysis using logistic regression showed the alcohol consumption had the most powerful influence to the level of urinary 8-OHdG. The levels of urinary 8-OHdG could be used as an indicator of oxidative DNA damage and early diagnosis of occupational disease among electroplating workers who were exposed by chromium.
Volume: 5
Issue: 4
Page: 422-426
Publish at: 2016-12-01

Rapid-Acting Antidepressants and Underlying Mechanisms

10.11591/ijphs.v5i4.4828
Samuel E Wilson , Meta Chen , Hiren Darji
Loss of glial cells with resulting atrophy of the medial prefrontal cortex (mPFC) as well as the hippocampal area is demonstrated in depressed patients by brain imaging and postmortem studies. The mPFC is the master control of mood and emotional response. The hippocampus is part of the limbic system, the main function of which is to regulate emotions. The mPFC depends on the hippocampus for rapid learning and memory consolidation. Unlike monoamine reuptake inhibitor antidepressants, which take 6 to 8 weeks to exert their full effects, and with 30 - 40% unresponsive rate, ketamine acts rapidly, within a couple of hours, and has higher responsive rates. It suggests that in theory, due to its rapid effect, Ketamine could well serve as a bridging remedy to lower the rate of suicidal risk before Selective serotonin re-uptake inhibitors (SSRIs) reach their full effect for long-term depression management. Yet, ketamine has long been linked with abusive potential and possible neurotoxicity if used in large doses over a prolonged period. Even though there are no collected data to prove the associated adverse effects, awareness of this negative aspect of ketamine is sufficiently widespread to propel the psychiatric community to look for other rapidly acting antidepressant alternatives. Recent studies have shown that scopolamine, the Yueju pill, and magnesium are rapid-onset antidepressants that have mechanisms comparable to that of ketamine. These rapid-acting antidepressant agents promise to be effective and safer choices for depression management in the future, providing that further studies and investigations to produce a better and fuller understanding of their effects and limitations.
Volume: 5
Issue: 4
Page: 347-353
Publish at: 2016-12-01

Job Satisfaction among the Nurses of Makueni District Hospital, Kenya

10.11591/ijphs.v5i4.4850
Anthony wambua Mathulu , Benard Wambua Mbithi
The purpose of the study was to evaluate the level of job satisfaction among the nurses of Makueni District Hospital. This was necessitated by the high nurse staff turnover from the facility and a myriad of complains from various departments. The study was a cross sectional descriptive survey involving about 50 nurses that was carried out between 15 and 19th July 2013. The study employed mixed method approach. Tests of significance were through use of Chi-square, Fishers exact test and logistic regression. The key results were that overall job satisfaction was low (36%). There were significant relationships between job satisfaction and cordial relationship with the nurse manager (c2 12.131 df 4 p=0.016<0.05. Logistic regression p=0.018<0.05). The plans to quit the hospital and work elsewhere indicates a relationship with job satisfaction (c2 12.749 df 4 p=0.013<0.05). The findings of this study suggest that there is no enabling working environment for the nurses and this could be a barrier to service delivery in the Hospital. These findings suggest that the Nurse Managers should build up effective relationship with the staff and other departments and should identify negative working conditions which affect staff and appropriately delegate authority to them.
Volume: 5
Issue: 4
Page: 450-457
Publish at: 2016-12-01

Knowledge and Attitude of Students on Antimicrobial Resistance at Debre Markos University, Ethiopia

10.11591/ijphs.v5i4.4839
Desalegne Amare Zelellw , Habtamu Mellie Bizuayehu
Irrational use of medicines is a key reason for the increase and spread of antimicrobial resistance and it is a global concern. It is a fast mounting universal crisis. The main of this study of this study was to assess knowledge, attitude and practice of university students on antimicrobial resistance at Debre Markos University. Institutional based comparative cross-sectional survey was conducted from June to July with total sample size of 670. Participants were selected using simple random sampling method using random number table. Data clerk double entered the data into Epi data version 3.1 and transferred to SPSS Windows software version 21.0. Those variables that had associations at binary stage with p-value < 0.1, not collinear and biologically important variables were entered in to multiple logistic regression models. The cut off point for association was p-value < 0.05. About 14.8% study participants had adequate knowledge towards drug resistance.  Rural residences of the participants were significantly associated with drug resistance as compared to urban residence. Knowledgeable participants were significantly protective to self- medication and drug resistance as compare to those who had inadequate knowledge and participants who had positive attitude were positively associated with self-medication as compare to those who had negative attitude. The overall knowledge of participants regarding to antimicrobial resistance was low. In the other hand, majority of participants had positive attitude. Those participants who had positive attitude were significantly associated with antimicrobial resistance as compared to who had negative attitude.
Volume: 5
Issue: 4
Page: 384-391
Publish at: 2016-12-01

Subchronic Toxicity of Green Algae (Spyrogyra sp.) Ethanolic Extract on Hematologic Parameters

10.11591/ijphs.v5i4.5962
Nina Salamah , Wahyu Widyaningsih , Hari Susanti , Anggita Devi , Anita Wening Sejati , Zahra Alya Putri
Green Algae, an organism with active substance such as phytomelatonin, has potential to be developed as Indonesian traditional medicine. As the long term addition of Green Algae ethanol extract (Ekstrak etanol ganggang hijau, EEGH) influences the hematology system, in this paper, the safety test was done to ensure the safety of its use through subchronic toxicity test of EEGH on the hematology parameters of Wistar rats. The test group consisted of three groups treated with EEGH 100 mg/kg, 200 mg/kg, and 400 mg/kg, while the control group was given by 0.5% CMC-Na, with 8 rats each respectively. By using blood samples taken from orbital sinus on the 29th day, common hematologic parameters (erythrocytes, leukocytes, and hemoglobin level), the parameters of hemostasis (platelets, pT, aPTT, BT) and immune parameters (Differential Leukocytes Counts include neutrophils segment, lymphocytes, monocytes, and eosinophils) were finally observed and showed that the 28 days-addition of EEGH increase the hematological parameters of Wistar rats.
Volume: 5
Issue: 4
Page: 484-488
Publish at: 2016-12-01
1 2 3
...
1896 1897
Show 1514 of 1897

Discover Our Library

Embark on a journey through our expansive collection of articles and let curiosity lead your path to innovation.

Explore Now
Library 3D Ilustration