Pub Date : 2017-07-01DOI: 10.1109/QIR.2017.8168443
R. Munadi, Eka Firdaus, Teuku Yuliar Arif, F. Zulkifli
DNS is one of the important names in web-based information technology that allows users to be able to browse the desired information. DNS service has some similarities with a list of phone book that stores telephone numbers and addresses. To perform the function, the DNS service configured on a special machine that serves the request is a DNS Server. The reliability and accuracy of a DNS server in providing information must be maintained. However, there are times when a DNS server fails to function normally and provide good service. Therefore, in this study, the DNS servers are surveyed and evaluated where they are installed on public universities scattered throughout the provinces on the island of Sumatera, Indonesia. The accreditation standard BAN PT rank is used as a reference mapping and evaluation of the DNS Server. To evaluate the DNS Server, the test is done by DNS health approach considering factors: response time and reliability. The results show that the majority public universities DNS Server health is good and only a small portion that needs to be addressed so that the service information is not compromised. To cope with the problem of DNS Server health, it needs to evaluate the DNS server regularly, always get the DNS Server benchmarks and adopt a variety of settings from the website of the prestigious universities so that the performance of DNS servers always provides the best service.
{"title":"An evaluation of DNS server health of public universities in Sumatera Island","authors":"R. Munadi, Eka Firdaus, Teuku Yuliar Arif, F. Zulkifli","doi":"10.1109/QIR.2017.8168443","DOIUrl":"https://doi.org/10.1109/QIR.2017.8168443","url":null,"abstract":"DNS is one of the important names in web-based information technology that allows users to be able to browse the desired information. DNS service has some similarities with a list of phone book that stores telephone numbers and addresses. To perform the function, the DNS service configured on a special machine that serves the request is a DNS Server. The reliability and accuracy of a DNS server in providing information must be maintained. However, there are times when a DNS server fails to function normally and provide good service. Therefore, in this study, the DNS servers are surveyed and evaluated where they are installed on public universities scattered throughout the provinces on the island of Sumatera, Indonesia. The accreditation standard BAN PT rank is used as a reference mapping and evaluation of the DNS Server. To evaluate the DNS Server, the test is done by DNS health approach considering factors: response time and reliability. The results show that the majority public universities DNS Server health is good and only a small portion that needs to be addressed so that the service information is not compromised. To cope with the problem of DNS Server health, it needs to evaluate the DNS server regularly, always get the DNS Server benchmarks and adopt a variety of settings from the website of the prestigious universities so that the performance of DNS servers always provides the best service.","PeriodicalId":225743,"journal":{"name":"2017 15th International Conference on Quality in Research (QiR) : International Symposium on Electrical and Computer Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125252012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-07-01DOI: 10.1109/QIR.2017.8168461
Dian Widi Astuti, Arif Jubaidilah, M. Alaydrus
Very Small Aperture Terminal (VSAT) is a transceiver station that is used to exchange information via satellite. VSAT uses frequencies that consist of uplink and downlink frequency, where the uplink frequency is greater than the downlink frequency. Uplink frequency is in a range of 5.925–6.425 GHz while the downlink frequency is at 3.7–4.2 GHz. In this research, a substrate integrated waveguide bandpass filter is designed on VSAT downlink frequency. The simulation shows good performances between 3.7–4.2 GHz of 11% fractional bandwidth. In the middle frequency, the return loss (S11) is 17.76 dB and the insertion loss is 1.02 dB (S21). While on the measurement result gives 3.871 dB for insertion loss (S21) value and 30.87 dB for return loss (S11) value.
{"title":"Substrate integrated waveguide bandpass filter for VSAT downlink","authors":"Dian Widi Astuti, Arif Jubaidilah, M. Alaydrus","doi":"10.1109/QIR.2017.8168461","DOIUrl":"https://doi.org/10.1109/QIR.2017.8168461","url":null,"abstract":"Very Small Aperture Terminal (VSAT) is a transceiver station that is used to exchange information via satellite. VSAT uses frequencies that consist of uplink and downlink frequency, where the uplink frequency is greater than the downlink frequency. Uplink frequency is in a range of 5.925–6.425 GHz while the downlink frequency is at 3.7–4.2 GHz. In this research, a substrate integrated waveguide bandpass filter is designed on VSAT downlink frequency. The simulation shows good performances between 3.7–4.2 GHz of 11% fractional bandwidth. In the middle frequency, the return loss (S11) is 17.76 dB and the insertion loss is 1.02 dB (S21). While on the measurement result gives 3.871 dB for insertion loss (S21) value and 30.87 dB for return loss (S11) value.","PeriodicalId":225743,"journal":{"name":"2017 15th International Conference on Quality in Research (QiR) : International Symposium on Electrical and Computer Engineering","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127158337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-07-01DOI: 10.1109/QIR.2017.8168508
Muhammad Adi Nugroho, B. Kusumoputro
This paper introduces an approach to recognize face from 3D space on 2D image using fuzzy vector manifolds and nearest distance. We employ fuzzy vector to help the system minimize negative effect coming from noise and image degradation. On the training set, crisp vector representation of images will be transformed to its fuzzy vector representation using a specific triangle fuzzification method. Then, a linear interpolation method will be used to construct a manifold, making the system able to cope with pose variation across data. In the testing phase, we transform every unknown data image to its fuzzy-vector representation using the parameter we obtained from training phase. We then project the unknown fuzzy vector to the manifolds using a technique called fuzzy nearest distance. The output of the system will be the index of manifold that the data mostly belong to, in this case the prediction of person. This system is applied to recognize photos on our databases which some of them are influenced by noises. Experiment result show that the system is able to recognize person on 98% success rate, with a 3% reduction if noises were added.
{"title":"Fuzzy-appearance manifold and fuzzy nearest distance for face recognition on various poses and degraded images","authors":"Muhammad Adi Nugroho, B. Kusumoputro","doi":"10.1109/QIR.2017.8168508","DOIUrl":"https://doi.org/10.1109/QIR.2017.8168508","url":null,"abstract":"This paper introduces an approach to recognize face from 3D space on 2D image using fuzzy vector manifolds and nearest distance. We employ fuzzy vector to help the system minimize negative effect coming from noise and image degradation. On the training set, crisp vector representation of images will be transformed to its fuzzy vector representation using a specific triangle fuzzification method. Then, a linear interpolation method will be used to construct a manifold, making the system able to cope with pose variation across data. In the testing phase, we transform every unknown data image to its fuzzy-vector representation using the parameter we obtained from training phase. We then project the unknown fuzzy vector to the manifolds using a technique called fuzzy nearest distance. The output of the system will be the index of manifold that the data mostly belong to, in this case the prediction of person. This system is applied to recognize photos on our databases which some of them are influenced by noises. Experiment result show that the system is able to recognize person on 98% success rate, with a 3% reduction if noises were added.","PeriodicalId":225743,"journal":{"name":"2017 15th International Conference on Quality in Research (QiR) : International Symposium on Electrical and Computer Engineering","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121761080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2017-07-01DOI: 10.1109/QIR.2017.8168479
B. Harini, Aries Subiantoro, F. Yusivar
This paper presents sensorless control of Permanent Magnet Synchronous Motor (PMSM). In the sensorless control method, the stator current is measured to estimate the speed of the motor. When PMSM sensorless control is used in an electric vehicle, sometimes it causes another problem. When the motor is running in steady state and the motor is suddenly given a large load that has reverse torque direction, it will make a problem. In this case, the large load that is applied is a brake. The motor goes in a wrong orientation. This fact is an undesirable condition. The condition must be controlled so the motor can work well. This issue causes the sensorless control has not really applied to commercial interests. The phenomenon of wrong orientation will be the interest of our research. To predict the speed of the motor, we use Model Reference Adaptive System (MRAS) method as an observer. The IP speed controller is used to control the system. This phenomenon is verified by experimentation in the laboratory.
{"title":"Study of speed sensorless permanent magnet synchronous motor (PMSM) control problem due to braking during steady state condition","authors":"B. Harini, Aries Subiantoro, F. Yusivar","doi":"10.1109/QIR.2017.8168479","DOIUrl":"https://doi.org/10.1109/QIR.2017.8168479","url":null,"abstract":"This paper presents sensorless control of Permanent Magnet Synchronous Motor (PMSM). In the sensorless control method, the stator current is measured to estimate the speed of the motor. When PMSM sensorless control is used in an electric vehicle, sometimes it causes another problem. When the motor is running in steady state and the motor is suddenly given a large load that has reverse torque direction, it will make a problem. In this case, the large load that is applied is a brake. The motor goes in a wrong orientation. This fact is an undesirable condition. The condition must be controlled so the motor can work well. This issue causes the sensorless control has not really applied to commercial interests. The phenomenon of wrong orientation will be the interest of our research. To predict the speed of the motor, we use Model Reference Adaptive System (MRAS) method as an observer. The IP speed controller is used to control the system. This phenomenon is verified by experimentation in the laboratory.","PeriodicalId":225743,"journal":{"name":"2017 15th International Conference on Quality in Research (QiR) : International Symposium on Electrical and Computer Engineering","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133246754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/icadlt.2017.8547028
H. Suyanto, Rina Irawati
With the global energy crisis and the increasingly serious environmental problems, renewable energy becomes a future energy trends. As an important form of renewable energy used, distributed generation (DG) has been rapid development in the world. However, large scale integration of DGs will bring operating and challenges to the power system network. A microgrid is an important means to this problem, and gained much attention worldwide. This paper introduces the basic concept of microgrid, and analyze the new trends and challenges of the development of microgrids, as well as some technologies. These trends and challenges include higher renewable energy integration, multi energy forms, multilevel architecture, demand side management and generalized storage.
{"title":"Study trends and challenges of the development of microgrids","authors":"H. Suyanto, Rina Irawati","doi":"10.1109/icadlt.2017.8547028","DOIUrl":"https://doi.org/10.1109/icadlt.2017.8547028","url":null,"abstract":"With the global energy crisis and the increasingly serious environmental problems, renewable energy becomes a future energy trends. As an important form of renewable energy used, distributed generation (DG) has been rapid development in the world. However, large scale integration of DGs will bring operating and challenges to the power system network. A microgrid is an important means to this problem, and gained much attention worldwide. This paper introduces the basic concept of microgrid, and analyze the new trends and challenges of the development of microgrids, as well as some technologies. These trends and challenges include higher renewable energy integration, multi energy forms, multilevel architecture, demand side management and generalized storage.","PeriodicalId":225743,"journal":{"name":"2017 15th International Conference on Quality in Research (QiR) : International Symposium on Electrical and Computer Engineering","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125770025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.1109/icadlt.2017.8547022
Danila Machmud, Lembaga Sandi Negara, Dion Ogi
The needs of random key generator on Android smartphones grow in line with applications which provide cryptographic services. Overcoming this we can use sensor on Android itself to be a key generator, that called Accelerometer sensor. However, raw data generated from this sensor are weak data sources because they have many slow drifts. According to those background, Hong & Liu proposed the protocol that consists of three data-processing techniques, it Wash, Rinse, and Spin. This study implements the protocol by using the accelerometer sensor in android smartphone. It uses SDLC method to build an application. Differentiate process used in Wash step, FFT Radix-2 and SecureRandom() in Rinse step then Pseudo Random Bit Generator (PRBG) based on Chaotic Logistic Map used in the Spin step. Some tests such as Unit, Performance, and Usability testing are conducted to evaluate the application. The uit testing result shows the protocol is properly applied to Android-based random key generator application. The performance testing result show it needs 8.2 milliseconds to generate a 128-bit key. It graphically transforms and shuffles data on vary key's lengths and device condition. It has 4.8 milliseconds average time to save the generated keys into the smartphone's memory.
{"title":"The implementation of wash, rinse, and spin technique in accelerometer's data processing on android smartphone to generate stream keys","authors":"Danila Machmud, Lembaga Sandi Negara, Dion Ogi","doi":"10.1109/icadlt.2017.8547022","DOIUrl":"https://doi.org/10.1109/icadlt.2017.8547022","url":null,"abstract":"The needs of random key generator on Android smartphones grow in line with applications which provide cryptographic services. Overcoming this we can use sensor on Android itself to be a key generator, that called Accelerometer sensor. However, raw data generated from this sensor are weak data sources because they have many slow drifts. According to those background, Hong & Liu proposed the protocol that consists of three data-processing techniques, it Wash, Rinse, and Spin. This study implements the protocol by using the accelerometer sensor in android smartphone. It uses SDLC method to build an application. Differentiate process used in Wash step, FFT Radix-2 and SecureRandom() in Rinse step then Pseudo Random Bit Generator (PRBG) based on Chaotic Logistic Map used in the Spin step. Some tests such as Unit, Performance, and Usability testing are conducted to evaluate the application. The uit testing result shows the protocol is properly applied to Android-based random key generator application. The performance testing result show it needs 8.2 milliseconds to generate a 128-bit key. It graphically transforms and shuffles data on vary key's lengths and device condition. It has 4.8 milliseconds average time to save the generated keys into the smartphone's memory.","PeriodicalId":225743,"journal":{"name":"2017 15th International Conference on Quality in Research (QiR) : International Symposium on Electrical and Computer Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129313832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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