Pub Date : 2015-08-01DOI: 10.1109/QIR.2015.7374887
A. Naba, Muhammad Fadlil Khoironi, D. Santjojo
Ultrasonic measurement of distance larger than one wavelength is generally based on the measurement of time of flight (TOF), the time that a transmitted ultrasonic pulse takes to reach the receiver. The correlation method is widely used for estimating TOF, combined with the phase shift method to reduce the measurement errors. Although producing high accuracy, the combined method is expensive due to heavy computation and complex, not flexible, and very expensive hardware needed. In this paper the proposed method uses the threshold method, for the rough TOF estimation only, but then enhances the accuracy by measuring the phase shift using the correlation method with limited data samples of one wavelength. In this way it enables lighter computation, and therefore, limited software and hardware resources can still be used. Experimental results using a pair of transducers operating at 40 kHz and the sampling rate of 500 kHz show an accuracy better than 0.5 mm with the average error of about 2%.
{"title":"Low cost but accurate ultrasonic distance measurement using combined method of threshold-correlation","authors":"A. Naba, Muhammad Fadlil Khoironi, D. Santjojo","doi":"10.1109/QIR.2015.7374887","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374887","url":null,"abstract":"Ultrasonic measurement of distance larger than one wavelength is generally based on the measurement of time of flight (TOF), the time that a transmitted ultrasonic pulse takes to reach the receiver. The correlation method is widely used for estimating TOF, combined with the phase shift method to reduce the measurement errors. Although producing high accuracy, the combined method is expensive due to heavy computation and complex, not flexible, and very expensive hardware needed. In this paper the proposed method uses the threshold method, for the rough TOF estimation only, but then enhances the accuracy by measuring the phase shift using the correlation method with limited data samples of one wavelength. In this way it enables lighter computation, and therefore, limited software and hardware resources can still be used. Experimental results using a pair of transducers operating at 40 kHz and the sampling rate of 500 kHz show an accuracy better than 0.5 mm with the average error of about 2%.","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132242486","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374881
R. Yuwono, E. Yudaningtyas, Endah Budi Purnomowati, Gezadio Dhuha S, Faisal Ramadha
In this century, the trend an antenna should be simple and have small dimensions and multifunction. This paper present design of star patch with addition elliptical shape to bandwidth with dual frequency operation. The proposed antenna use fiberglass epoxy FR-4 substrate with dimension of mm2 with dielectric constant (?r) value of 3.9 and thickness 1.6 mm. The antenna work at frequency 1.759 GHz-3.237 GHz and 4.451 GHz-5.992 GHz with VSWR less than two, return loss below 9.54 dB which can work on GSM 1900 (1850-1990 MHz), UMTS (1920-2170 MHz), WLAN (IEEE 802.11b/g and IEEE 802.11a), mobile WiMax 2.3 GHz, 2.5 GHz, and fixed WiMax 5.8 GHz based on simulation program.
{"title":"The additional elliptical shape on star patch microstrip antenna for dual UWB","authors":"R. Yuwono, E. Yudaningtyas, Endah Budi Purnomowati, Gezadio Dhuha S, Faisal Ramadha","doi":"10.1109/QIR.2015.7374881","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374881","url":null,"abstract":"In this century, the trend an antenna should be simple and have small dimensions and multifunction. This paper present design of star patch with addition elliptical shape to bandwidth with dual frequency operation. The proposed antenna use fiberglass epoxy FR-4 substrate with dimension of mm2 with dielectric constant (?r) value of 3.9 and thickness 1.6 mm. The antenna work at frequency 1.759 GHz-3.237 GHz and 4.451 GHz-5.992 GHz with VSWR less than two, return loss below 9.54 dB which can work on GSM 1900 (1850-1990 MHz), UMTS (1920-2170 MHz), WLAN (IEEE 802.11b/g and IEEE 802.11a), mobile WiMax 2.3 GHz, 2.5 GHz, and fixed WiMax 5.8 GHz based on simulation program.","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"2431 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130847275","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374914
Nanang Sulistiyanto, M. Rif'an, O. Setyawati
We present the development of a LED (Light Emitting Diode) driver based on the synchronous buck power converter. The selected driver's prototype was realized using a FPGA (Field Programmable Gate Array) module as the switching controller, wherein the implementation using Xilinx Vivado 2014.4 and the measurements were successfully performed. The synchronous buck converter topology was investigated to achieve an optimal converter which showed a relatively high gain efficiency of 89% up to 92%.
{"title":"Design and prototype of LED driver based on the buck converter using FPGA module","authors":"Nanang Sulistiyanto, M. Rif'an, O. Setyawati","doi":"10.1109/QIR.2015.7374914","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374914","url":null,"abstract":"We present the development of a LED (Light Emitting Diode) driver based on the synchronous buck power converter. The selected driver's prototype was realized using a FPGA (Field Programmable Gate Array) module as the switching controller, wherein the implementation using Xilinx Vivado 2014.4 and the measurements were successfully performed. The synchronous buck converter topology was investigated to achieve an optimal converter which showed a relatively high gain efficiency of 89% up to 92%.","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128797182","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374919
K. Octavianus, B. Anggoro, A. S. Ahmad
In this research, Intelligent Electronic Device architecture will be designed. This architecture, which a processor is embedded into, is based on multi-agent and will be applied on electric power system. Proposed lED has some abilities: provide information about equipment condition, perform diagnosis, and provide prediction on transformer life remaining. Data from sensors is extracted to provide information on equipment condition. Electrical and physical quantities to be monitored are voltage, current, temperature, and frequency. lED will then analyze data to provide user with information about the condition of the transformer and life remaining estimation. Analyzing process is done using A3S algorithm. This algorithm will then determine which hypothesis is dominant in determining transformer performance and the condition of the
{"title":"Power transformer condition monitoring and performance calculation method based on information fusion","authors":"K. Octavianus, B. Anggoro, A. S. Ahmad","doi":"10.1109/QIR.2015.7374919","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374919","url":null,"abstract":"In this research, Intelligent Electronic Device architecture will be designed. This architecture, which a processor is embedded into, is based on multi-agent and will be applied on electric power system. Proposed lED has some abilities: provide information about equipment condition, perform diagnosis, and provide prediction on transformer life remaining. Data from sensors is extracted to provide information on equipment condition. Electrical and physical quantities to be monitored are voltage, current, temperature, and frequency. lED will then analyze data to provide user with information about the condition of the transformer and life remaining estimation. Analyzing process is done using A3S algorithm. This algorithm will then determine which hypothesis is dominant in determining transformer performance and the condition of the","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132071791","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374884
Septian Wahyu Kusuma Wardhani, Basari, F. Zulkifli, E. Rahardjo
Many wireless devices in common use today are worn either on or in close proximity to the body. Those devices are designed for applications such as activity or vital-signs monitoring, typically using Bluetooth/Zigbee technology to communicate with external devices under body-centric wireless communications system (BWCS). In addition, currently, microwave tomography (MWT) system is widely researched since it offers a portable, affordable and non-invasively modality. Study on interaction between the human body and electromagnetic (EM) waves inevitably must be evaluated for wearable and implantable antennas for BWCS or antennas/array for MWT system. Basically, the EM interaction includes two ways: an influence of the human body on the performance of antennas and an influence of EM waves on the human body. This paper studies on such phenomenon by designing two numerical phantom models particularly for head phantom, i.e. a homogeneous phantom model and multilayer phantom at 5.8 GHz. As for the head homogeneous phantom, it is set as a skull-mimicking tissue, whose permittivity and conductivity are set equally at 5.8 GHz. The multilayer head phantom is constructed by six layers namely skin, fat, skull, CSF (cerebrospinal fluid), brain and muscle. In this paper, a dipole is then put in proximity to the head phantom models for investigating the influence of such models on its performances at 5.8 GHz due to EM field interaction. The results show that the frequency center of dipole antenna tends to shift at lower frequency when situated close to the head phantom, comparing to the simulation in free space. Moreover, the width of beam-pattern of the dipole is significantly affected by phantom's structure. Finally, it can be stated that different structure of tissue-mimicking model will affect different phenomenon due to absorption properties for each structure.
{"title":"Effect of human head phantom models on the performance of dipole antenna at 5.8 GHz","authors":"Septian Wahyu Kusuma Wardhani, Basari, F. Zulkifli, E. Rahardjo","doi":"10.1109/QIR.2015.7374884","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374884","url":null,"abstract":"Many wireless devices in common use today are worn either on or in close proximity to the body. Those devices are designed for applications such as activity or vital-signs monitoring, typically using Bluetooth/Zigbee technology to communicate with external devices under body-centric wireless communications system (BWCS). In addition, currently, microwave tomography (MWT) system is widely researched since it offers a portable, affordable and non-invasively modality. Study on interaction between the human body and electromagnetic (EM) waves inevitably must be evaluated for wearable and implantable antennas for BWCS or antennas/array for MWT system. Basically, the EM interaction includes two ways: an influence of the human body on the performance of antennas and an influence of EM waves on the human body. This paper studies on such phenomenon by designing two numerical phantom models particularly for head phantom, i.e. a homogeneous phantom model and multilayer phantom at 5.8 GHz. As for the head homogeneous phantom, it is set as a skull-mimicking tissue, whose permittivity and conductivity are set equally at 5.8 GHz. The multilayer head phantom is constructed by six layers namely skin, fat, skull, CSF (cerebrospinal fluid), brain and muscle. In this paper, a dipole is then put in proximity to the head phantom models for investigating the influence of such models on its performances at 5.8 GHz due to EM field interaction. The results show that the frequency center of dipole antenna tends to shift at lower frequency when situated close to the head phantom, comparing to the simulation in free space. Moreover, the width of beam-pattern of the dipole is significantly affected by phantom's structure. Finally, it can be stated that different structure of tissue-mimicking model will affect different phenomenon due to absorption properties for each structure.","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121517459","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374888
R. Nuryadi, R. D. Mayasari, Lia Aprilia, B. Yuliarto
Surface plasmon resonance (SPR) sensing devices have attracted interest both from a fundamental physics perspective and as higly sensitive devices for detecting small chemical and biological objects. In this work, we design SPR device using a modified Kretschmann configuration for gas detection. After gold coating on the flat surface of BK-7 semicylindrical prism, ZnO microstructures which work as sensitive layer, are formed on the gold film surface. The light reflectance is measured for various angles in order to observe the SPR spectra. Next, we measure the shift of SPR angle due to response of ZnO sensitive layer to CO2 gas. It is found that the absorption of gas molecules on the sensitive layer produces the shift of SPR spectra to the higher incident angle. The change of the light reflectance due to the gas response on the time-dependent characteristics is also studied.
{"title":"Fabrication of ZnO/Au/prism-based surface plasmon resonance device for gas detection","authors":"R. Nuryadi, R. D. Mayasari, Lia Aprilia, B. Yuliarto","doi":"10.1109/QIR.2015.7374888","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374888","url":null,"abstract":"Surface plasmon resonance (SPR) sensing devices have attracted interest both from a fundamental physics perspective and as higly sensitive devices for detecting small chemical and biological objects. In this work, we design SPR device using a modified Kretschmann configuration for gas detection. After gold coating on the flat surface of BK-7 semicylindrical prism, ZnO microstructures which work as sensitive layer, are formed on the gold film surface. The light reflectance is measured for various angles in order to observe the SPR spectra. Next, we measure the shift of SPR angle due to response of ZnO sensitive layer to CO2 gas. It is found that the absorption of gas molecules on the sensitive layer produces the shift of SPR spectra to the higher incident angle. The change of the light reflectance due to the gas response on the time-dependent characteristics is also studied.","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121067631","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374921
G. Wibisono, Rinto Hariwijaya
Service quality standards is represented by SLA (Service Level Agreement). One way to improve the SLA is to minimize service downtime. This downtime is called with TTR (Time to Repair) which is an FMS (Fault Management System) performance indicator. The lower TTR values, the better the FMS performance. This research discuss the performance improvement by evaluating FMS business process, determine the components that lead to system failure, measure the value of a system failure probability with changes in the composition of its components, and obtain business process that improve FMS performance. FMS business process is represented in SOP of fiber optic fault handling process. MC (Markov Chain) method is used to determine the level of FMS business process performance for each process from open ticket to closed ticket. FTA (Fault Tree Analysis) method is used to determine the probability of system failure for various components composition in the FMS. The purpose of this method is to get a system that has a minimum system failure probability. The new system is then re-tested for its performance using MC method. With both methods we can obtain business process models that can improve the performance of FMS PT. XYZ up to 92.64%.
服务质量标准由SLA(服务水平协议)表示。改进SLA的一种方法是尽量减少服务停机时间。这种停机时间被称为TTR(修理时间)，这是一个FMS(故障管理系统)性能指标。TTR值越低，FMS性能越好。本研究通过对FMS业务流程的评估来讨论性能的提升，确定导致系统失效的组件，通过组件组成的变化来度量系统失效概率的值，从而得到提升FMS性能的业务流程。光纤故障处理过程SOP中体现了FMS业务流程。采用MC (Markov Chain)方法确定从开票到闭票各流程的FMS业务流程性能水平。故障树分析法(FTA)用于确定FMS中各部件组成的系统故障概率。该方法的目的是得到一个具有最小系统故障概率的系统。然后用MC方法对新系统的性能进行了重新测试。通过这两种方法，我们可以获得可以将FMS PT. XYZ的性能提高92.64%的业务流程模型。
{"title":"FMS performance improvement in fiber optic network operator PT. XYZ using Markov Chain and Fault Tree Analysis","authors":"G. Wibisono, Rinto Hariwijaya","doi":"10.1109/QIR.2015.7374921","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374921","url":null,"abstract":"Service quality standards is represented by SLA (Service Level Agreement). One way to improve the SLA is to minimize service downtime. This downtime is called with TTR (Time to Repair) which is an FMS (Fault Management System) performance indicator. The lower TTR values, the better the FMS performance. This research discuss the performance improvement by evaluating FMS business process, determine the components that lead to system failure, measure the value of a system failure probability with changes in the composition of its components, and obtain business process that improve FMS performance. FMS business process is represented in SOP of fiber optic fault handling process. MC (Markov Chain) method is used to determine the level of FMS business process performance for each process from open ticket to closed ticket. FTA (Fault Tree Analysis) method is used to determine the probability of system failure for various components composition in the FMS. The purpose of this method is to get a system that has a minimum system failure probability. The new system is then re-tested for its performance using MC method. With both methods we can obtain business process models that can improve the performance of FMS PT. XYZ up to 92.64%.","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122451614","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374906
I. M. Wartana
In recent years, integration of a wide variety of Distributed Generation (DG) technology in distribution networks has become one of the major management concerns for professional engineers. In this paper, one type of the DG i.e. Wind Turbine is optimally integrated in a power network for enhancing the performance of the network. A new variant of Genetic Algorithm (GA) dedicated in multi-objective optimization problems known as Non-dominated Sorting Genetic Algorithm II (NSGA-II) has been proposed for accomplishing the same. To aid the decision maker choosing the best compromise solutions from the Pareto front, the fuzzy-based mechanism is employed for this task. The NSGA-II is used to obtain the optimal integration and sizing of the DG in a suitable load bus of the system. Multi-objective functions are considered as the indices of the system performance viz: maximization of system loadability in system security and stability margin i.e. voltage and line limit whereas minimization of the real power loss of the transmission lines. Simulation studies are undertaken on modified IEEE 14-bus and a practical Indonesia Java-Bali 24-bus systems. Results show that the dynamic performance of the power system can be effectively improved by the optimal integration and sizing of the DG.
{"title":"A multi-objective problems for optimal integration of the DG to the grid using the NSGA-II","authors":"I. M. Wartana","doi":"10.1109/QIR.2015.7374906","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374906","url":null,"abstract":"In recent years, integration of a wide variety of Distributed Generation (DG) technology in distribution networks has become one of the major management concerns for professional engineers. In this paper, one type of the DG i.e. Wind Turbine is optimally integrated in a power network for enhancing the performance of the network. A new variant of Genetic Algorithm (GA) dedicated in multi-objective optimization problems known as Non-dominated Sorting Genetic Algorithm II (NSGA-II) has been proposed for accomplishing the same. To aid the decision maker choosing the best compromise solutions from the Pareto front, the fuzzy-based mechanism is employed for this task. The NSGA-II is used to obtain the optimal integration and sizing of the DG in a suitable load bus of the system. Multi-objective functions are considered as the indices of the system performance viz: maximization of system loadability in system security and stability margin i.e. voltage and line limit whereas minimization of the real power loss of the transmission lines. Simulation studies are undertaken on modified IEEE 14-bus and a practical Indonesia Java-Bali 24-bus systems. Results show that the dynamic performance of the power system can be effectively improved by the optimal integration and sizing of the DG.","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124884771","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374896
Y. Suryanto, Suryadi, K. Ramli
In the image encryption, chaotic map usually used for pixel permutation, due to it can generate chaotic permutations hence difficult to predict. However chaotic map which is widely used for image permutations like Arnold Cat Map (ACM) has a relatively low recurrence period so vulnerable to the known image attack. Besides, the key space Arnold cat map is also relatively low so vulnerable to brute-force attack and limited to N square matrix. ACM generally combined with other chaotic maps to produce the encryption that is more resistant to brute force attacks and the known image attacks. But there come with a cost, which is the additional process and the encryption can't be purely based on permutations that known robust to noise. Therefore in this paper we propose a chaotic permutation method which has a very large recurrence period and key space, and can be applied to M × N matrix. The proposed method is to apply the Chaotic Permutation Multi Circular Shrinking and Expanding Movement (CPMCM) which is controlled by the expanded key. Based on the analysis of chaos properties, the chaotic method meets the characteristics of the chaos system, with a very large recurrence period which is equal to the Least Common Multiple (LCM) of all real numbers N where N is the size of the permuted block. And also has a very large key space that is equal to N factorial. The Spearman correlation test also showed that among the permutation sequences are not correlated or random.
{"title":"Chaos properties of the Chaotic Permutation generated by Multi Circular Shrinking and Expanding Movement","authors":"Y. Suryanto, Suryadi, K. Ramli","doi":"10.1109/QIR.2015.7374896","DOIUrl":"https://doi.org/10.1109/QIR.2015.7374896","url":null,"abstract":"In the image encryption, chaotic map usually used for pixel permutation, due to it can generate chaotic permutations hence difficult to predict. However chaotic map which is widely used for image permutations like Arnold Cat Map (ACM) has a relatively low recurrence period so vulnerable to the known image attack. Besides, the key space Arnold cat map is also relatively low so vulnerable to brute-force attack and limited to N square matrix. ACM generally combined with other chaotic maps to produce the encryption that is more resistant to brute force attacks and the known image attacks. But there come with a cost, which is the additional process and the encryption can't be purely based on permutations that known robust to noise. Therefore in this paper we propose a chaotic permutation method which has a very large recurrence period and key space, and can be applied to M × N matrix. The proposed method is to apply the Chaotic Permutation Multi Circular Shrinking and Expanding Movement (CPMCM) which is controlled by the expanded key. Based on the analysis of chaos properties, the chaotic method meets the characteristics of the chaos system, with a very large recurrence period which is equal to the Least Common Multiple (LCM) of all real numbers N where N is the size of the permuted block. And also has a very large key space that is equal to N factorial. The Spearman correlation test also showed that among the permutation sequences are not correlated or random.","PeriodicalId":127270,"journal":{"name":"2015 International Conference on Quality in Research (QiR)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132951286","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 : 2015-08-01DOI: 10.1109/QIR.2015.7374904
Bulkis Kanata, Teti Zubaidah
Geomagnetic data are continuously recorded at observatories during 24 hours a day with particular sampling frequency (1-2 Hz). Despite quiet places are mandatory for international standard observatories, noise may not be avoided due to natural conditions, such as HF signals arising from Sun's activities and ULF ones arising from Earth's activities, as well as anthropogenic sources from human activities during day times. On the other hand, geomagnetic signal processing, particularly for determinations of earthquake precursors needs uncontaminated data which are often regarded as night time values. While many papers using geomagnetic data have selected their own time span, actually no obvious limits have been commonly determined for the quietest time so far. Hence each region are necessary have their unique time span, since differences of socio-cultural and human behaviors over the world. This paper applies wavelet transformation to determine the quietest time range of geomagnetic signal processing for Japanese regions by de-noising of declination (the most sensitive geomagnetic values) of three INTERMAGNET observatories (i.e. Kakioka (KAK), Kanoya (KNY), and Memambetsu (MMB)). Comprehensive evaluations which are taken over selected days during ten years (2001-2010) resulted in the quietest time span of 21:48:00-00:53:00 at the Local Time. These results are in line with the time used by Hayakawa et al. (1996), e.g. 22:00:00- 02:00:00 LT, which are mostly referred by many researchers.
地磁数据以特定的采样频率(1-2赫兹)在观测站每天24小时连续记录。虽然国际标准天文台必须在安静的地方，但由于自然条件的影响，例如太阳活动产生的高频信号和地球活动产生的超低频信号，以及白天人类活动产生的人为来源，噪音可能无法避免。另一方面，地磁信号处理，特别是地震前兆的确定，需要未受污染的数据，这些数据通常被视为夜间值。虽然许多使用地磁数据的论文都选择了自己的时间跨度，但实际上迄今为止，通常没有确定最安静时间的明显限制。因此，由于世界各地的社会文化和人类行为的差异，每个地区都有其独特的时间跨度。本文利用小波变换对Kakioka (KAK)、Kanoya (KNY)和Memambetsu (MMB)三个INTERMAGNET观测站的赤纬(最敏感的地磁值)进行降噪，确定了日本地区地磁信号处理的最安静时间范围。在十年(2001-2010)中选定的日子进行综合评估，结果显示当地时间21:48:00-00:53:00是最安静的时间跨度。这些结果与Hayakawa et al.(1996)使用的时间一致，例如22:00:00- 02:00:00 LT，这是许多研究者引用最多的时间。
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