Keselesaan ke tempat kerja mempengaruhi kualiti hidup masyarakat bandar di Mukim Kajang, Selangor

Keselesaan penduduk ke tempat bekerja boleh mempengaruhi kualiti hidup masyarakat. Kajian ini telah mengenalpasti bahawa keselesaan ke tempat bekerja merupakan aspek yang boleh menyumbang kepada kualiti hidup yang baik. Oleh itu, aspek keselesaan ke tempat kerja harus diambilkira dalam menilai kualiti hidup masyarakat di bandar. Permasalah kajian ini ialah isu ketidakselesaan penduduk ke tempat bekerja telah menyebabkan gangguan pada kualiti hidup. Objektif kajian ialah mengkaji persepsi penduduk di bandar terhadap keselesaan ke tempat kerja. Kajian dijalankan di Bandar Kajang dan Bandar Baru Bangi. Kaedah soal selidik telah digunakan di lapangan. Sejumlah 700 responden telah dipilih secara rawak bebas di kawasan kajian. Data-data yang dikumpul telah dianalisis menggunakan program SPSS. Hasil kajian mendapati paling ramai responden iaitu 135 orang bekerja di tempat lain-lain, 112 bekerja di Kajang,105 bekerja di Bandar Baru Bangi, 36 bekerja di Universiti Kebangsaan Malaysia dan 26 bekerja di Serdang. Analisis perkaitan antara jarak rumah ke tempat bekerja menunjukkan nilai khi kuasa dua sebanyak 89.329 dan signifikan pada aras 0.05 (p=0.000), perkaitan antara jarak rumah ke tempat kerja dengan tempoh terlibat kesesakan lalu lintas menunjukkan nilai khi kuasa dua sebanyak 227.568 dan signifikan pada aras 0.05 (p=0.000). Sejumlah 208 responden terganggu emosi semasa berhadapan dengan kesesakkan lalu lintas, manakala 150 menyatakan masih boleh bersabar. Seramai 359 responden menyatakan tidak selesa ke tempat kerja sekiranya berlaku kesesakan lalu lintas.Kajian merumuskan bahawa kajian keselesaan ke tempat kerja wajar digunakan sebagai penunjuk kualiti hidup masyarakat di bandar, berdasarkan konflik-konflik yang dialami penduduk di bandar semasa berinteraksi ke tempat bekerja

Diagnosis of liver disease by computer- assisted imaging techniques: A literature review

Copyright © 2022 The authors. Diagnosis of liver disease using computer-aided detection (CAD) systems is one of the most efficient and cost-effective methods of medical image diagnosis. Accurate disease detection by using ultrasound images or other medical imaging modalities depends on the physician's or doctor's experience and skill. CAD systems have a critical role in helping experts make accurate and right-sized assessments. There are different types of CAD systems for diagnosing different diseases, and one of the applications is in liver disease diagnosis and detection by using intelligent algorithms to detect any abnormalities. Machine learning and deep learning algorithms and models play also a big role in this area. In this article, we tried to review the techniques which are utilized in different stages of CAD systems and pursue the methods used in preprocessing, extracting, and selecting features and classification. Also, different techniques are used to segment and analyze the liver ultrasound medical images, which is still a challenging approach to how to use these techniques and their technical and clinical effectiveness as a global approach

Application of optical coherence tomography for improved in-situ flaw detection in nylon 12 selective laser sintering

Despite significant advances made since the inception of selective laser sintering (SLS), many of the same problems identified by early researchers including high part porosity, inadequate surface finish, and part strength uncertainty persist today. Because of these challenges, quality validation and improved process control continue to be identified as critical areas of improvement in industry roadmaps. To address these issues, an optical coherence tomography (OCT) sensor is investigated for feasibility of use in in-situ flaw detection in SLS. Benchtop OCT imaging of nylon in solid, liquid, and resolidified phases revealed subsurface imaging through liquid and resolidified nylon material was possible. Subsequent benchtop imaging showed that multiple-scattering was the cause of an imaging artifact which contributed to the limited imaging depth in nylon powder. Additionally, nylon powder was continuously imaged before, during, and after melting and resolidification. The resulting images showed scattering was consistent with the presence of crystalline spherulites, suggesting the spherulites are a strong source of scattering in the nylon 12. An OCT sensor was subsequently mounted on a production-sized research SLS machine. Design and implementation information is detailed including artifact correction and noise subtraction strategies. The OCT sensor is then used to detect various common defects in the SLS process. Imaging single layer individual scanlines revealed deeper melt depth due to overheating from galvo deceleration near the end of the scan lines. Additionally, surface curl was able to be quantified and visualized for a build. Finally, an SLS build was performed at higher powder bed temperatures. OCT images collected from the build were compared with X-ray computed tomography (CT) images, and many of the pores in the OCT images are shown to agree well with those detected in the CT images. One pore in the dataset was much larger than the others in the part. This caused the author to hypothesize that a different mode was responsible for creating these pores which a subsequent build confirmed. A summary of contributions and future work is also listed.Chemical Engineerin

Echocardiography

The book "Echocardiography - New Techniques" brings worldwide contributions from highly acclaimed clinical and imaging science investigators, and representatives from academic medical centers. Each chapter is designed and written to be accessible to those with a basic knowledge of echocardiography. Additionally, the chapters are meant to be stimulating and educational to the experts and investigators in the field of echocardiography. This book is aimed primarily at cardiology fellows on their basic echocardiography rotation, fellows in general internal medicine, radiology and emergency medicine, and experts in the arena of echocardiography. Over the last few decades, the rate of technological advancements has developed dramatically, resulting in new techniques and improved echocardiographic imaging. The authors of this book focused on presenting the most advanced techniques useful in today's research and in daily clinical practice. These advanced techniques are utilized in the detection of different cardiac pathologies in patients, in contributing to their clinical decision, as well as follow-up and outcome predictions. In addition to the advanced techniques covered, this book expounds upon several special pathologies with respect to the functions of echocardiography