Analisis Emisi Co2 pada Studi Perencanaan Pengembangan Pembangkitan Listrik Wilayah Bangka Belitung dengan Opsi Nuklir

ANALISIS EMISI CO2 PADA STUDI PERENCANAAN PENGEMBANGAN PEMBANGKITAN LISTRIK WILAYAH BANGKA BELITUNG DENGAN OPSI NUKLIR. Studi ini bertujuan untuk menganalisis penurunan emisi CO2 pada studi perencanaan pengembangan pembangkitan listrik wilayah Bangka Belitung dengan opsi nuklir. Studi perencanaan pengembangan pembangkitan listrik dilakukan dengan WASP IV. Kandidat pembangkit yang digunakan untuk pengembangan adalah PLTU Batubara 50 MW, PLTG 50 MW, PLTN 100 MW, dan PLTU Biomassa 7 MW. Dua kasus yang dikembangkan, adalah: Kasus RUPTL dan Kasus Industrialisasi. Setiap kasus dibagi menjadi dua sub kasus yaitu : Tanpa Nuklir dan Dengan Nuklir. Hasil studi menunjukkan bahwa emisi CO2 dari sistem pembangkitan listrik wilayah Bangka Belitung akan berkurang dengan masuknya PLTN ke dalam sistem kelistrikan. Dari simulasi terlihat bahwa PLTN akan masuk ke jaringan pada kisaran tahun 2020-an, dan masuknya PLTN akan berimplikasi pada penurunan emisi CO2 dari sistem pembangkitan listrik. Pada akhir tahun studi (2030), jika dibandingkan opsi tanpa nuklir, emisi CO2 akan berkurang sebesar 35% untuk kasus RUPTL dan 52% untuk kasus industrialisasi

Energi Nuklir sebagai Sumber Energi Panas Alternatif pada Kilang Minyak

ENERGI NUKLIR SEBAGAI SUMBER ENERGI PANAS ALTERNATIF PADA KILANG MINYAK. Telah dilakukan studi aplikasi energi panas nuklir temperatur tinggi pada kilang minyak. Tujuan studi ini adalah untuk memahami karakteristik dan kemungkinan pemanfaatan energi panas reaktor nuklir temperatur tinggi untuk operasi kilang minyak. Dalam studi ini, kilang minyak dengan kapasitas pengolahan minyak mentah sebesar 126 MBSD digunakan sebagai acuan perhitungan. Diasumsikan energi panas nuklir temperatur tinggi akan memasok kebutuhan kukus dan listrik pada kilang tersebut, sedang operasi proses temperatur tinggi dianggap tetap menggunakan bahan bakar fosil. Reaktor nuklir yang digunakan adalah reaktor nuklir temperatur tinggi daya kecil HTR-PM 250. Dari neraca energi diperoleh bahwa pemanfaatan energi termal reaktor nuklir temperatur tinggi dengan daya sebesar 250 MWt terdistribusi sebagai berikut: 41,23 MWt untuk memproduksi uap kukus 1 (385oC, 40 kg/cm2, 55,6 ton/jam), 101,47MWt untuk memproduksi uap kukus 2 (360oC, 15 kg/cm2, 131,1 ton/jam), dan 60 MWt untuk memproduksi listrik sebesar 24 MWe. Energi panas yang tersisa sebesar 22,3 MWt dikonversi menjadi listrik sebesar 8,93 MWe untuk disambungkan ke jaringan. Penggunaan energi nuklir menggantikan sebagian bahan bakar fosil pada kilang minyak dengan kapasitas 126 MBSD memberi penghematan bahan bakar fosil sebesar 64,8 ribu ton/tahun, yang setara dengan pengurangan laju emisi gas CO2 sebesar 182,4 ribu ton/tahun

A case of solitary kidney with duplex collecting systems and renal vascular variants in an adult male cadaver

We describe a unique solitary kidney with duplex collecting system and vascular variation observed in an 86-year-old White male formaldehyde- and phenol-fixed cadaver during routine academic dissection. The left renal fossa was empty with an intact adrenal gland, and the right renal fossa contained a fused renal mass with apparent polarity between the superior and inferior regions and two renal pelves converging into a single ureter. There were three right renal arteries supplying the renal mass; the superior and middle arteries were noted to be postcaval and the inferior artery was precaval. There were also two right renal veins draining into the inferior vena cava and following a regional distribution with the superior vein draining the inferior portion of the renal mass. Despite generally being asymptomatic, the detection of renal anatomical variants is clinically important for appropriate patient management and surgical interventions

A case of solitary kidney with duplex collecting systems and renal vascular variants in an adult male cadaver

We describe a unique solitary kidney with duplex collecting system and vascular variation observed in an 86-year-old white male formaldehyde- and phenol-fixed cadaver during routine academic dissection. The left renal fossa was empty with an intact adrenal gland, and the right renal fossa contained a fused renal mass with apparent polarity between the superior and inferior regions and two renal pelves converging into a single ureter. There were three right renal arteries supplying the renal mass; the superior and middle arteries were noted to be postcaval and the inferior artery was precaval. There were also two right renal veins draining into the inferior vena cava and following a regional distribution with the superior vein draining the inferior portion of the renal mass. Despite generally being asymptomatic, the detection of renal anatomical variants is clinically important for appropriate patient management and surgical interventions

Composants Passifs Intégrés en Technologie CMOS pour la Miniaturisation des Circuits RF

Une démarche originale pour le développement de composants passifs dans une filière industrielle consiste à effectuer un report des contraintes en performances sur les caractéristiques électriques des matériaux utilisés en couches minces. Nous présentons dans cet article la démarche adoptée à travers trois phases clés du développement d’une technologie faibles coûts de composants passifs intégrés en filière CMOS. Le développement et la caractérisation de films minces d’oxyde de titane et de tantale. L’intégration de films résistifs d’oxynitrure de titane en filière industrielle et la modélisation électrique d’inductances spirales intégrées en CMOS

Perceptions of social media utilization among orthopaedic foot and ankle surgeons

Abstract Background The growing social media presence in healthcare has provided physicians with new ways to engage with patients. However, foot and ankle orthopaedic surgeons have been found to underuse social media platforms despite their known benefits for patients and surgeons. Thus, this study sought to investigate the reasons for this phenomenon and to identify potential barriers to social media utilization in clinical practice. Methods A 19-question survey was distributed to active attending physicians identified through the American Orthopaedic Foot & Ankle Society membership database. The survey included demographic, practice characteristics, and social media use questions assessed by a 5-point Likert scale. Logistic regression was used to identify predictors of positive attitudes toward social media. Results Fifty-eight surgeons were included. Most respondents were male (n = 43, 74.1%), in private practice (n = 31, 53.5%), and described their practice to be greater than 51% elective procedures (n = 46, 79.4%). The average years in practice was 14.8 years (standard deviation, SD: 10.0 years). A total of 32.8% (n = 19) of surgeons reported using social media as part of their clinical practice. Facebook (n = 19, 32.8%), a professional website or blog (n = 18, 31.0%), and LinkedIn (n = 15, 25.9%) were the most used platforms–primarily for practice marketing or brand development (n = 19, 32.8%). A total of 58.6% (n = 34) of surgeons reported they did not use social media. The primary reasons were the time commitment (n = 31, 53.5%), concerns about obscuring professional boundaries (n = 22, 37.9%), and concerns regarding confidentiality (n = 11, 19.0%). Many surgeons reported that social media positively influences foot and ankle surgery (n = 23, 39.7%), although no individual predictors for these views could be identified. Conclusions Foot and ankle orthopaedic surgeons tended to view social media use positively, but the time investment and concerns over professionalism and confidentiality pose challenges to its use. Given the influence of a surgeon’s social media identity on patient satisfaction and practice building, efforts should be made to streamline social media use for foot and ankle surgeons to establish their online presence. Level of evidence Level IV, cross-sectional study

Abnormal 18F-FDG and 82Rb PET Findings in Chagas Heart Disease.

Uptake of the radiopharmaceutical F-FDG visualized by PET imaging can reflect abnormal myocardial inflammation. When utilized in conjunction with other imaging modalities, such as echocardiography, PET F-FDG imaging can help distinguish between active cardiac sarcoidosis and other etiologies of nonischemic cardiomyopathy. We present a case of a 46-year-old man with nonischemic cardiomyopathy and ventricular tachycardia who underwent an echocardiogram suggestive of cardiac Chagas disease. A subsequent F-FDG PET demonstrated abnormal hypermetabolism. The diagnosis was confirmed by positive serologic examination results

Abnormal 18F-FDG and 82Rb PET Findings in Chagas Heart Disease.

Uptake of the radiopharmaceutical F-FDG visualized by PET imaging can reflect abnormal myocardial inflammation. When utilized in conjunction with other imaging modalities, such as echocardiography, PET F-FDG imaging can help distinguish between active cardiac sarcoidosis and other etiologies of nonischemic cardiomyopathy. We present a case of a 46-year-old man with nonischemic cardiomyopathy and ventricular tachycardia who underwent an echocardiogram suggestive of cardiac Chagas disease. A subsequent F-FDG PET demonstrated abnormal hypermetabolism. The diagnosis was confirmed by positive serologic examination results