FDM preparation of bio-compatible UHMWPE polymer for artificial implant

Due to its properties of high wear, creep resistance, high stiffness and strength, Ultra-High Molecular Weight Polyethylene (UHMWPE) was developed to eliminate most metallic wear in artificial implant, which conventionally found in stainless steel, Cobalt Chromium (Co-Cr) and Titanium (Ti) alloys. UHMWPE has an ultra-high viscosity that renders continuous melt-state processes including one of the additive manufacturing processes, Fused Deposition Modeling (FDM) ineffective for making UHMWPE implant. Attempt to overcome this problem and adapting this material to FDM is by blending UHMWPE with other polyethylene including High Density Polyethylene (HDPE) and Polyethylene-Glycol (PEG) which provide adequate mechanical properties for biomedical application along with the improvement in extrudability. It was demonstrated that the inclusion of 60% HDPE fraction has improved the flowability of UHMWPE in MFI test and showing adequate thermal stability in TGA

Sensor material characterisation for magnetometer application

Pengukuran dan gangguan medan magnet arus terus dan arus ulang-alik memerlukan penderia medan magnet yang mempunyai kepekaan yang tinggi dan stabil. Untuk menghasilkan penderia tersebut, ciri-ciri bahan magnet yang baik telah dikenalpasti. Beberapa jenis bahan magnet yang berbeza telah digunakan untuk mengkaji ciri-ciri dan kesannya terhadap medan magnet. Teras gelang yang diperbuat daripada bahan-bahan magnet tersebut direkabentuk dengan dimensi yang sama bagi membolehkan perbandingan dibuat dengan mudah. Selain itu, rod tunggal dan berkembar juga telah digunakan sebagai teras penderia fluxgate, untuk melihat prestasi setiap jenis penderia tersebut. Kedua-dua penderia tersebut telah diuji dengan menggunakan dua sumber bahan magnet iaitu bar magnet tetap dan solenoid dengan diameter dawai yang berbeza. Isyarat keluaran bagi setiap penderia fluxgate seterusnya diproses bagi mengenalpasti hubungannya dengan ketumpatan medan magnet

A novel approach to the design of DSP systems using minimum complexity Finite State Machines

The paper presents a new and different approach to the design and realisation of Digital Signal Processing (DSP)systems by utilising Finite State Machines (FSM). The DSP system is modelled by mapping all its potential states into an FSM, whose complexity is usually very high. The FSM mirrors the complete functionality of the system and thus describes its behaviour in full detail. Examples for FSMs of first and second order digital recursive filters are provided and the current version of the software simulating the FSM corresponding to any linear time-invariant DSP system is described. The potential of this approach including state reduction techniques as well as the inclusion of non-linear DSP systems is also outlined, and further future research intentions are briefly explored

Selective Laser Sintering of Polymer Nanocomposites

This paper describes the fabrication and characterization of polymer nanocomposite (PNC) materials for use in the selective laser sintering (SLS) process. PNC materials are of great interest generally because of their excellent physical properties, and offer excellent potential in rapid manufacturing of structural polymeric parts. Three different nano additive materials have been used: cerium oxide IV, yttrium stabilized zirconia, and layered Hectorite clay. These materials have been used to reinforce PA6 polymer using solution blending and spray drying to create powder with particle sizes in the range of 5-40 µm. The mechanical properties and microstructure of the PNC materials have been evaluated and the results compared to those of unfilled polymer.Mechanical Engineerin

Towards a digitised process-wheel for historic building repair and maintenance projects in Scotland

Purpose – With the increasing demand for high quality economical and sustainable historic building Repair and Maintenance (R&M) allied with the perennial problem of skills shortages (PM-project management and on-site practice) investment in new technologies becomes paramount for modernising training and practice. Yet, the historic R&M industry, in-particular Small–Medium sized Enterprises (SMEs) have yet to benefit from digital technologies (such as laser scanning, virtual reality (VR) and cloud-computing) which have the potential to enhance performance and productivity. Design/methodology/approach – A qualitative participatory action research approach was adopted. One demonstration project (Project A) exhibiting critical disrepair, showcasing the piloting of a five phased digitised ‘process-wheel’ intended to provide a common framework for facilitating collaboration of project stakeholders thereby aiding successful project delivery is reported. Five semi-structured interviews were conducted with industry employers to facilitate the process-wheel concept development. Findings – Implementing only Phase 1 of the digitised ‘process-wheel’ (e-Condition surveying incorporating laser scanning) resulted in an estimated 25-30% cost and time savings) when compared to conventional methods. The accrued benefits are two-fold: (1) provide a structured standardised data capturing approach that is shared in a common project repository amongst relevant stakeholders; (2) inform the application of digital technologies to attain efficiencies across various phases of the process-wheel. Originality/value – This paper has provided original and valuable information on the benefits of modernising R&M practice, highlighting the importance of continued investment in innovative processes and new technologies for historic building R&M to enhance existing practice and in form current training provision. Future work will focus on further piloting and validation of the process-wheel in its entirety on selected demonstration projects with a view of supporting the industry to digitise its workflows and going-fully digital to realise optimum process efficiencies

Information of Personality Disorder as a Negative Impact of Social Media Through Infographic for Teenagers

The development of current technology makes the flow of information is speeding up. Nowadays, people have a dependency on using social media leaning to increase. Most people utilize social media for communication, socialization, or just lifestyle. From the internet, we can get everything, start from information about the recipes to personal information about someone. This is possible because a lot of people want to share personal information on social media. All easiness which obtained from social media surely helps activity in our life. It has benefited and also has a disadvantage, if we ex-ploit it excessively one of the negative effects, we can receive is a personality disorder. Most people do not recognize this negative effect from social media utilize if we ignore this personality disorder, it can directly impact teen mental develop-ment. Therefore, it needs media that can inform recognize the initial stage of personality disorder that causes by social media exploitation. The qualitative methods were used in this study, whereas the collection of data is done through observation, interview, and literature study. The outcome data processing made into a reference for displaying information content on personality disorders. Communication design theory, visual communication design, infographics, illustrations, colors, typography, and layouts are the basis for infographic media design. Infographic visualization as visual communication media can deliver the information that is able to be accessed by the teen. The research result expected to be the aid that can help teens be wiser in social media utilization and exploitation. Keywords: Personality Disorder, Infographic, Social Medi

Penghasilan modul pembelajaran lukisan kejuruteraan berbantukan komputer

Perkembangan teknologi maklumat dalam dunia pendidikan tidak lagi boleh dinafikan pada masa kini. Keperluan yang meningkat dalam sistem pembelajaran dan pengajaran memerlukan mereka yang terlibat memberi sepenuh tumpuan terhadap mata pelajaran bagi mencapai matlamat. Untuk tujuan ini Modul Pembelajaran Lukisan Kejuruteraan berbantukan Komputer dihasilkan bagi membantu memudahkan pelajar dalam mata pelajaran Lukisan kejuruteraan. Statistik deskriptif digunakan dalam mengumpul dan menganalisis data. Secara keseluruhannya dari hasil kajian, menunjukkan para pelajar memberikan maklum balas yang positif terhadap modul ini. Semua responden memberi tindak balas positif terhadap modul dari segi mesra pengguna, isi kandungan, motivasi dan daya kognitif. Hasil dari kajian ini, didapati bahawa kebanyakan pelajar berminat terhadap Modul Pembelajaran Lukisan Kejuruteraan Berbantukan Komputer. Walau bagaimanapun masih terdapat beberapa aspek yang perlu diperbaiki untuk memantapkan modul ini

Kajian Pemberdayaan Pemerintahan Daerah Evaluasi Implementasi Otonomi Daerah di Kabupaten Nganjuk

Evaluation on the OTODA (local autonomy) in Nganjuk regency is given more emphasis on the evaluation of the implementation of the 1974 Regulation Number 5. It is due to the fact that its implementation shows empowerless of the local government since the central or provincial governments give more intervention to the domestic matters of the local government, namely Nganjuk regency. All policies made by the local government should get an agreement from the central or provincial governments, besides being supported by a top down planning system showing a governmental system with centralistic tendency. In this research, it is found that the implementation of real and responsibility autonomy is not in line with the purposes and goals as stated in Regulation Number 5, 1974 as its implementation tends to the centralistic governmental system so the local government is less powerful. The phenomena are (1) services to the people, implementation of development and government can run effectively if the local government is given authority to implement all governmental matters as its own matters emphasizing harmony and democracy aspects, (2) stronger deconcentration institution and weaker decentralization institution have hampered the implementation of local autonomy and development. (3) to make the local government more powerful, enough sources of local original incomes (PAD) are needed, and the local government are free to discover PAD especially from local tax and retribution which are the most important factors; (4) local and social empowerment through local regulations treating local governments to be implementer, so they never reach the intended purposes. Authority to plant, implement and control themselves will enable the local government to be able to give good and appropriate advantages as needed; and (5) in order to realize the local autonomy with intended and right needs, namely the realization of top services, clean government and good governance, qualified and good actors are needed, and it needs good human resources