A study on the fabrication of multi material 3D patterns using inkjet printing technology

I n addition to its application in media printing, inkiet printing IS becotning an increasingly attractive option for the distribution and patterning of materials for a wide variety of applications such as the fabrication of prototype for the manufacturing sectors. Recently' a rapid protol)'ping method for building parts layer-by-layer has led to interest in fabrication of protol)'pes with extra functionalil)' by inkjet printing. ;\ new system is expected which can produce assemblies composed of parts with more than one color or with more than one material. This study intends to utilize Java program to manipulate CAD design data and interface them \vith a modified commercial 357 -nozzle piezoelectric printer with experiments focusing on the drop positioning and arrangement required to fabricate a multi material 3D patterns. Functional fluid materials such as silver nanoparticle conducti\T ink was successfully printed using inkjet printing technology to directly write an electronic circuit. In order to study the parameters affecting drop formation of an inkjet printer, a single nozzle piezoelectric inkjet system was also dC\'eloped to study basic parameters such as \'oltage amplitude, firing frequency and fluid viscosity. The understanding of these parameters reactions gi\'es a broader \·iew on work in the fabrication of multi material 3D patters using inkjet printing technology

Variability reduction in stencil printing of solder paste for surface mount technology

Competition in stencil printing to produce excellence in the finished product is intense. Faults in the printing process are a major source of board failure. Studies have shown that over 63% of defects identified after reDow originated from the solder paste printing ( A. Lotfi ,1998 ) . However. understanding these failures are a challenging problem as the printing process has a large number of non linearly dependent variables such as factors relating to paste (formulation. viscosity), the environment (temperature, humidity) and machine parameter (alignment, pressure and speed of squeegee, blade hardness etc). The process engineer is challenged to widen the process window so that future modifications to the process, such as the addition of a new component, can be achieved with little. if any, change in materials or process parameters. This thesis reports the effect of temperature and humidity variation from the manufacturing environment on the solder paste consistency and optimization of the essential parameters of squeegee pressure, squeegee speed. separation speed and print gap. The outcome of variation in temperature and humidity to the solder paste viscosity were analyzed and tests were done to determine the characteristic of the solder paste. The tests results indicate that the temperature and humidity has an impact on the solder paste printability. thus some attempts must be taken to control these variables. For parameter optimization. the analysis was carried out using statistical optimization. The main aim was to combine these parameters with three main pitch categories to produce the acceptable print formation. The results showed that. the ideal print result requires optimum statistical combinations of four parameters essentially related to a particular pitch. It is also shown that there is a diversity and contrasts of the combination of the parameters for each category of pitch. Detailed explanations as to the phenomenon are outlined in the thesis

The effects of pictures on the order of accessing online war stories

Research on how people read news stories has shown that readers chose to read and access news stories associated with pictures that contained an element of attraction. Researchers have found that the emotional elements within the picture could also play a role. It is unclear how neutral human interest pictures influence readers to access news stories. Is the access process influenced by less emotive pictures or more human interest elements? These issues were explored in an experiment in which 24 students participated. The experiment compared similar news that was accompanied with a human interest picture, information graphic and without information graphic. The focus of the news stories was on war news which almost always contained human interest elements that could be neutral or emotion-laden. The experiment suggested that human interest pictures of war stories could be equally effective in attracting readers to read and remember the news stories

Pembingkaian visual berita krisis Lahad Datu

Visual memainkan peranan penting dalam memberi gambaran yang jelas tentang sesuatu kejadian kepada khalayak. Visual boleh dianggap sebagai alat komunikasi yang berkuasa untuk mencetuskan tindakbalas emosi yang tinggi dan boleh diingati berbanding perkataan semata-mata. Penggunaan visual dalam pelaporan sesuatu berita krisis berupaya membantu khalayak untuk lebih memahami sesuatu peristiwa yang berlaku. Artikel ini bertujuan mengenal pasti pembingkaian visual dalam liputan berita krisis Lahad Datu yang disiarkan dalam akhbar Utusan Malaysia dan Berita Harian. Kaedah analisis kandungan digunakan untuk menganalisis visual yang dipaparkan dalam kedua-dua akhbar dalam tempoh masa 20 hari iaitu bermula 1 hingga 20 Mac 2013. Kajian ini menggunakan model pembingkaian visual yang dipelopori oleh Rodriguez dan Dimitrova (2011) yang mencadangkan model empat tahap bingkai visual iaitu pertama, visual sebagai sistem denotatif; kedua, visual sebagai sistem semiotik-stilistik; ketiga, visual sebagai sistem konotatif; dan visual sebagai perwakilan ideologi. Sistem ini boleh diaplikasikan untuk menganalisis sebarang jenis kandungan visual media atau persepsi khalayak terhadap kandungan tersebut. Hasil kajian mendapati kedua-dua akhbar Utusan Malaysia dan Berita Harian menggunakan sistem denotatif dalam melaporkan visual tentang berita krisis Lahad Datu ini. Dua bingkai utama yang ditonjolkan adalah bingkai politik dan kemanusiaan manakala bingkai pemimpin mendominasi liputan visual dalam konteks berita krisis ini. Hasil kajian juga menunjukkan bahawa kedua-dua akhbar turut menggunakan sumber visual dari agensi antarabangsa seperti Associated Press (AP), AFP dan Reuters

The performance of students in university subjects at UTM’s

TITAS has been introduced in the university curriculum as one of the general subjects/courses that all students are required to take. At UTM’s franchised centres, it has been discovered that many students have obtained very poor grades for this subject. The reasons for the poor performance had to be determined and this study attempted to discover the main reasons why students performed badly in the subject. The study found that among others it was a problem of attitudes both on the part of the teacher as well as the student besides communication problems between UTM and its franchised centres that contributed to the problem

Hubungan di antara strategi mesej oleh agen pembangunan Majlis Amanah Rakyat (MARA) dengan penyertaan dalam latihan dan adopsi inovasi

Penyertaan masyarakat dalam sesuatu program pembangunan yang dijalankan oleh pihak kerajaan merupakan elemen utama yang menyumbang kepada penerimaan idea inovasi yang dibawa. Dalam memastikan masyarakat menerima idea inovasi yang dibawa dalam kehidupan mereka, faktor strategi dalam menyampaikan maklumat perlu diberikan perhatian umumnya oleh agen pembangunan yang dilantik oleh pihak kerajaan. Tujuan kajian ini dijalankan untuk (i) meneliti hubungan di antara strategi mesej dengan penyertaan dalam latihan dan (ii) mengenalpasti hubungan di antara strategi mesej dengan adopsi inovasi dalam kalangan peserta latihan. Kajian ini melibatkan seramai 373 orang responden yang terdiri daripada peserta latihan anjuran MARA di Terengganu, dan memfokuskan kepada program latihan keusahawanan yang berasaskan Teknologi Komunikasi dan Maklumat (ICT) berasaskan kepada penggunaan laman web. Kajian ini merupakan kajian kuantitatif melalui pengedaran soalselidik kepada responden yang terlibat. Kajian ini dijalankan di MARA Terengganu. Dapatan kajian mendapati bahawa terdapat hubungan yang signifikan di antara strategi mesej dengan penyertaan dalam latihan yang dianjurkan oleh pihak MARA. Selain itu dapatan turut menjelaskan bahawa terdapat hubungan yang signifikan di antara strategi mesej dengan adopsi inovasi

Signifikan dalam Pemilihahan Ayat al-Quran sebagai Terapi dalam Rawatan Autistik secara Umum [Significance in The Selection of al-Qur'an Verse as Therapy in The Treatment of Autistic in General]

Penggunaan ayat al-Quran sebagai terapi dalam rawatan penyakit dewasa ini tidak boleh dinafikan lagi. Dalam hal ini, terdapat kombinasi ayat al-Quran yang berbeza digunakan terhadap rawatan sesuatu penyakit walaupun rawatan terhadap penyakit yang sama. Tambahan lagi, setiap pengamal juga mempunyai kombinasi ayat tersendiri ketika rawatan berpandukan pengalaman dan ilmu masing-masing. Melalui analisis indukif dan deduktif, artikel ini bertujuan untuk membincangkan kepentingan dalam pemilihan sesuatu ayat al-Quran bagi rawatan terhadap penyakit austistik secara umum, yang disokong oleh penjelasan dan pandangan ulama’ tafsir dan sarjana semasa. Kombinasi ayat-ayat yang dipilih tersebut adalah berdasarkan kepada garis umum bagi semua pesakit autistik. Hasil kajian mendapati bahawa terdapat 15 kombinasi ayat daripada beberapa surah yang boleh dijadikan terapi umum bagi rawatan penyakit autistik, yang disokong  berdasarkan kepada beberapa signifikan yang umum bagi semua pesakit autistik. Kombinasi ini boleh dijadikan sebagai terapi atau salah satu usaha dalam membantu pesakit autistik sekalipun tidak dapat menyembuhkan secara menyeluruh. Diharapkan terapi ini dapat digunakan oleh guru pembimbing di sekolah untuk membantu pesakit autistik di sekolah khas di Malaysia ini. The use of Quranic verses as therapy in the treatment of diseases as of late cannot be denied any further. In this regard, there are different combinations of Qur'anic verses being used as a treatment of a particular disease, even for same disease. In addition, each practitioner also practices his own combination of verses during treatment depending on their experience and studies. Through inductive and deductive analysis, this article aims to discuss the significance in the selection of each verse of the Qur'an for treatment of autistic diseases in general, which are backed by the explanation and opinion of current scholars. The combination of the selected verses is based on the general guidelines for all autistic patients. The results of the study found that there are 15 combinations of verses from several surahs that can be used as a general therapy for the treatment of autistic diseases based on some common significance for all autistic patients. This combination can be used as a therapy or amongst the efforts to assist autistic patients albeit it cannot be completely cured. It is hoped that this therapy can be used by guiding teachers in schools to help autistic patients in special schools in Malaysia

Computer numerical control printed circuit board drilling machine. / Mohd Hisham Hj. Ibrahim and Norlela Mustaffa

Computer Numerical Control has been found to be extensively used in the manufacturing industry in view of the programmability and accuracy it provides. Printed Circuit Board drilling is an ideal application for demonstrating the Computer Numerical Control concept. Further mass produced and high accurate components for linear motion such as recirculating ball screws, linear bearings and Linear Motion elements are readily available at low cost. Hence a Printed Circuit Board drilling machine using the CNC principles and above mentioned Linear Motion elements, has been conceptually designed. The mechanical part of the machine was planned for fabrication, but the non availability in time, has forced us to demonstrate a small scale model utilising the components already available in CADEM Center

Porosity effects of AlSi10mg parts produced by selective laser melting

Selective Laser Melting (SLM) is one of the powder-based manufacturing processes that has a wider established uses in the production of metallic alloy parts. It is capable of producing a high-density part through the melting of powder to form the desired shape. Fabrication of the AlSI10Mg part relies on several process parameters such as the laser power, laser scan speed, hatch distance, layer thickness and scanning strategy. They are specially designed and monitored to achieve optimum level. In this paper, porosity percentage were obtained from manipulating the hatch distance of fabricated SLM parts. The results appeared that smallest percentage obtained when the hatch distance was 0.13mm which is 0.46%. However, the highest porosity obtained when the lower hatch distance applied

An Exploratory Factor Analysis (EFA): Analysis of message strategy instrument validity

Message strategy is a collection, compilation and dissemination of ideas, issues and information by taking into consideration the basics of communication skills in the execution process. In the context of development, the dissemination of information by agents of development is unclear and ambiguous which this results in the information being misunderstood by the public, especially when it involves a diversity of the publics’ backgrounds. The lack of communication strategy arrangements by the development agents has caused the informationto be delayed or probably truncated for the public to accept. This paper explains the process included in identifying the items that are related to message strategy in the context of community development. The validation of the items involved two methods;content validity and factor analysis. The analysis of content validity proved that all of the items of message strategy adopted from the previous researchers in the context of development were accepted via Analysis of the Content Validity Index (CVI). In addition, factor analysis also discovered that items were extracted according to the factor as adopted from the previous instrument. Both analyses concluded that the items of message strategy which were adopted for this study in the context of community development were accepted