Universiti Teknikal Malaysia Melaka: UTeM Open Journal System
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Security Enhanced Rhythm Authentication using Relative Finger-Tip Positions
Get PDFThe rhythm authentication algorithm uses the concept of a traditional keystroke authentication and a multitouch technology based on a touchable device. Three measurements are used in the rhythm authentication method which consists of holding times, latency times, and the number of fingers per beat. These measurements are compared with the user templates. The user is authenticated if a percentage of error is in a predetermined range. However, using only three measurements is not enough. If the attacker is familiar with the victim, the rhythm authentication can be attacked by shoulder surfing or eavesdropping. Additionally, only a percentage of similarity between the user template in database and user’s input for classifying is not a reliable algorithm. In this research, we propose a security-enhanced rhythm authentication using relative finger-tip positions and the KNN algorithm for classification to prevent shoulder-surfing attacks
Collated Studies on Rectifying Circuit on Impact-Based Piezoelectric Energy Harvesting
Get PDFNowadays, energy consumption for ultra-low power energy such as piezoelectric energy harvester has suffered a very huge power loss when rectifying the generated AC signal into regulated DC voltage. This paper presents a method on enhancing the efficiency of the proposed rectifier circuit on Lead Zirconate Titanate (PZT) piezoelectric disk. The experiment was conducted by actuating the transducer by applying one single impact pulse only from a weight-drop test setup. The aim of this study is to increase the efficiency of the extracted output power from piezoelectric by reducing the power losses during the rectification process. Enhancements were made by identifying factors affecting the generated output power from the transducer. Four different types of rectifier topologies were studied and optimized by varying the level of forward voltage drop, Vf across the diode. The enhancement of the generated output voltage from the harvester was also conducted by altering and specifically designed the mechanical configuration of the disk’s supporting base in order to increase the displacement of the piezoelectric strain. The system performances have been analyzed and the resulted data have been plotted into voltage and power curves against the resistive impedance. It was found that the power efficiency of full-wave bridge rectifier constructed with the lowest Vf, is the highest compared to the half-wave and the specialized voltage doubler rectifier
Dual-Stacked Transparent Patch Antenna Using AgHT-8 for Wireless Application
Get PDFA dual-stacked transparent patch antenna using silver coated polyester (AgHT-8) thin film as radiating element and perspex acrylic dielectric substrate as mechanical support is proposed. Employing an air gap between the stacking structure is proven to exhibit better performance in terms of bandwidth and gain compared to a single structure patch antenna. The dual-stacked antenna was also experimentally verified, achieving reasonable agreement between the simulation and measurement results. The proposed antenna has the potential to be adopted in any transparent devices where invisibility of physical appearance is inherent
Simulation of compressible flow using a semi-implicit TVD scheme
Get PDFTotal variation diminishing (TVD) scheme is a kind of robust high-resolution approach, which removes the undesirable oscillations generated by numerical solution. The present work proposes a new implementation of the TVD scheme into a density-based semi-implicit finite-volume procedure to solve the inviscid and viscous flow equations. The proposed algorithm uses a simple linearization technique for convective fluxes. In order to enhance the accuracy of the algorithm, a high-resolution TVD scheme is employed in the discretization of the governing equations. This procedure has a simple implementation compared to other explicit and implicit schemes. The present scheme is first examined for some inviscid and viscous steady-state flows at several Mach numbers from subsonic to the supersonic regime. In addition, the inviscid and viscous unsteady flows are simulated and compared with experimental and numerical results, so that an acceptable correspondence was obtained. Results from this study indicate that the proposed algorithm is accurate for a wide range of Mach numbers
UPAYA MENDESKRIPSI KATA BAHARU BUKAN ISTILAH: SUATU CADANGAN PERANCANGAN (THE COMPETENCY TO DESCRIBE NEW WORDS (NOT TERMINOLOGIES): A PROPOSAL)
Get PDFPenggunaan kata baharu (bukan istilah) untuk penggunaan harian yang popular di media sosial mampu mewujudkan keadaan tidak tenteram dalam suasana linguistik standard sesuatu bahasa. Hal ini kerana, pelbagai bentuk kata baharu yang muncul dalam media, tidak mempedulikan peraturan dan sistem bahasa sedia ada, sama ada dari aspek sebutan, ejaan, peristilahan, kosa kata, tatabahasa dan laras bahasa. Jika dari satu sudut pandang, fenomena ini dianggap menimbulkan masalah, namun dari satu perspektif yang lain, fenomena ini perlu ditangani dengan bijak. Hal ini kerana, tidak dapat tidak, bahasa memang akan terus berkembang dan hidup, selari dengan sifat kedinamikan bahasa itu sendiri. Selaras dengan hasrat tersebut, maka kertas kerja ini bertujuan mengupaya pendeskripsian kata baharu yang popular di laman sosial. Dengan menjadikan kata baharu ‘kekwat’ sebagai contoh analisis, strategi pendeskripsian kata baharu dipecahkan kepada dua proses utama iaitu proses pemerolehan data dan proses penganalisisan data. Proses pemerolehan data dimulakan dengan mengenal pasti kata baharu yang akan dijadikan data dengan meneliti penggunaan butiran kata dalam laman sosial seperti Facebook, Twitter, Myspace, dan Instagram. Selepas kata-kata tersebut dikenal pasti, setiap kata akan diklasifikasikan kepada tiga kelompok jenis kata yang dianggap sebagai content lexical (kata nama, kata kerja dan kata adjektif). Seterusnya, kata-kata tersebut perlu disahkan belum didokumentasikan dalam sebarang kamus Melayu melalui kaedah proses rujuk silang dengan menggunakan empat (4) kamus rujukan utama, sebelum diselisik datanya daripada pangkalan data korpus WebCorp. Proses penganalisisan data pula dibuat berdasarkan tiga (3) fokus utama, iaitu analisis yang berfokus kepada pola penggunaan, aspek makna, dan mengenal pasti maklumat tambahan berlandaskan teori Prosodi Semantik, yang dijalankan secara janaan komputer iaitu melalui perisian TextSTAT 2.9. Strategi mendeskripsi kata baharu yang dicadangkan dalam kertas kerja ini diharap dapat menjadi pencetus kepada kaedah mengurus kedinamikan kata baharu yang lebih sistematik dan ilmiah, manakala dapatan kajian menerusi tatacara analisis yang dicadangkan pula diharap dapat memperlihatkan ‘rupa paras’ kata baharu yang digunakan. Kata Kunci: media sosial, kata baharu, korpus, WebCorp, TextSTATABSTRACT The regular and predominant utilisation of newly-formed words (not terminologies) in social media puts forth a displeasing voice to the standard linguistic setting of a language. This is chiefly due to the fact that the use of these words in the media disregard the prevailing rules and linguistic systems, be they the pronunciation, spelling, terminology, vocabulary, grammar and register. One the one hand, this phenomenon is deemed a thorny linguistic issue, but on the other hand, this should rather be aptly managed. This goes along with the very dynamic nature of a language, which inevitably keeps on developing from time to time. In accordance with the aforesaid premise, the paper aims to obtain the descriptions of the new words which are regularly used in social media. The word ‘kekwat’ was selected as the sample, and the describing strategy was grouped into two main processes, namely data elicitation process and data analysis process. The data elicitation process was initiated by identifying the use of the newly-formed words in the social media platforms, such as Facebook, Twitter, Myspace and Instagram. Subsequently, the identified words were classified into three categories under the umbrella of content lexical (nouns, verbs and adjectives). Following the grouping process, the words were then verified as undocumented in any Malay dictionary by cross-referencing them using four (4) main dictionaries. Next, the data were scrutinised using the WebCorp database. The data analysis process was completed based on three (3) main focuses, i.e. the analysis focusing on the usage pattern, meanings, and identification of additional information resting on the Semantic Prosody theory, which was computed using the TextSTAT 2.9 application. The proposed strategy of description in this paper is thus hoped to bring about a more systematic and scientific approach to manage the dynamism of the newly-formed words. It is also hoped that the findings, based on the analytical procedures may shed some light on how the words are contextually utilised. Keywords: social media, newly-formed words, corpus, WebCorp, exSTA
THE EFFECT OF ENTREPRENEURIAL ORIENTATION OF SMALL FIRMS INNOVATION
Get PDFThe innovation has become a crucial factor in developing business in both large and small organizations. The entrepreneurial orientation (EO) is recognized to be an effective development approach for innovation performance. However, the majority of past and current literature focus on the association between EO and innovation performance in the large organizations compared to small and medium firms, especially in the developing countries. Thus, this study aims to examine the association between EO and innovation performance in small business innovation performance in Malaysia. Due to the fact that the small business is a wide sector, food small firms were selected because they contribute significantly to Malaysian economy development and job creation. A survey was conducted with 177 firms, while regression was employed to analysis the relationship. The finding of this study ensures that there is positive relationship between EO and innovation performance in food small firms in Malaysia
Integrated Personality Profiling Framework Using Traits and Factors Theory for Malaysian HLI Enrolment: A New Approach
Get PDFPersonality profiling is importantespecially in education and human resourcemanagement. Inability to identify individuals’personality may cause misunderstanding ofones potential; and further more, he/she mightfail to recognize his/her own career or academicdirection. This study aimed to develop anintegrated personality framework; using Traitand Factor Theory of Occupational Choice. Thecompleted framework was used as the coreconcept of integrated profiling instrument, namedas Integrated Personality Profiling (i-PRO).The main beneficiary of the completed (i-PRO)will be students, academics and non-academicpersonnel. The sample for this initial study was380 students from one Higher Learning Institution(HLI) in Malaysia. The sampling method usedwas random sampling. The study was done toexplore the Holland’s 3-code interest traits amongengineering students of the said HLI. One of thedeveloped domain used in this initial study wascareer interest domain. The Holland’s 3-codetypologies for Higher Learning Institution (HLI)respondents are Investigative, Social and Realistic(I, S, R)
Automatic Road Crack Segmentation Using Thresholding Methods
Get PDFMaintenance of good condition of roads are very essential to the economy and everyday life of people in a every country. Road cracks are one of the important indicators that show degradations of road surfaces. Inspection of roads that have been done manually took a very long time and tedious. Hence, an automatic road crack segmentation using thresholding methods have been proposed in this study. In this study, ten road crack images have been pre-processed as an initial step. Then, normalization techniques, L1-Sqrt norm have been applied onto images to reduce the variation of intensities that skewed to the right. Then, thresholding methods, Otsu and Sauvola methods have been used to binarize the images. From the experiment of ten road crack images that have been done, normalization technique, L1-Sqrt norm can help to increase performance of road crack segmentation for Otsu and Sauvola methods. The results also show that Sauvola method outperform Otsu method in detecting road cracks
IPv6 Readiness towards Future Internet of Things (IoT)
Get PDFThis paper aims to examine the contribution of IPv6 infrastructure preparedness towards the readiness for IPv6 migration with emphasis on the aspect of physical infrastructure comprises of deployment, equipment and cost. Quantitative study has been carried out by using questionnaire as data collection towards 126 respondents which were network administrators and data has been analyses using regression analysis. Besides, Statistical Package for the Social Sciences (SPSS) version 19 has been used as the tool for data analysis. Findings clearly show that the roles of equipment and deployment, specifically planning, are very important factors that contribute towards the readiness for migration in an organisation. The research undoubtedly shows the contribution and importance of infrastructure aspect in the direction of the IPv6 migration. Therefore top management and policy makers should promote the upgrading of IT infrastructure in their IPv6 roadmap
The Feasibility of Music and Talk Radio Program as a Focus Stimulant for Driver
Get PDFLong distance driver tends to listento the music in order to help them awake on theroad. However, several studies have reported thatmusic has repetition element which is a catalystto attention deficit phenomenon. This studyevaluated the feasibility of music and talk radioprogram as a stimulant to keep our focus behindthe wheel. N1 waves of 11 participants were studiedand the results have suggested that music is not agood stimulant for driving partner compared totalk radio program. All the participants showeda great attention when listened to talk programcompared to music of their choice