Allocation of component types to machines in the automated assembly of printed circuit boards

Duman, Ekrem (Dogus Author) -- An earlier version of this paper which has been presented at ISCIS'06: The 21st International Symposium on Computer and Information Sciences, November 1-3, 2006 Istanbul, Turkey, has been published in Lecture Notes in Computer Science [18].Although the use of electronic component placement machines has brought reliability and speed to the printed circuit board (PCB) assembly process, to get higher utilization, one needs to solve the resulting complex operations research problems efficiently. In this study, the problem of distributing the assembly workload to two machines deployed on an assembly line with two identical component placement machines to minimize the line idle time is considered. This problem is NP-Complete even in its simplest form. A mathematical model and several heuristics have been proposed to solve this problem efficiently

CTU Depth Decision Algorithms for HEVC: A Survey

High-Efficiency Video Coding (HEVC) surpasses its predecessors in encoding efficiency by introducing new coding tools at the cost of an increased encoding time-complexity. The Coding Tree Unit (CTU) is the main building block used in HEVC. In the HEVC standard, frames are divided into CTUs with the predetermined size of up to 64x64 pixels. Each CTU is then divided recursively into a number of equally sized square areas, known as Coding Units (CUs). Although this diversity of frame partitioning increases encoding efficiency, it also causes an increase in the time complexity due to the increased number of ways to find the optimal partitioning. To address this complexity, numerous algorithms have been proposed to eliminate unnecessary searches during partitioning CTUs by exploiting the correlation in the video. In this paper, existing CTU depth decision algorithms for HEVC are surveyed. These algorithms are categorized into two groups, namely statistics and machine learning approaches. Statistics approaches are further subdivided into neighboring and inherent approaches. Neighboring approaches exploit the similarity between adjacent CTUs to limit the depth range of the current CTU, while inherent approaches use only the available information within the current CTU. Machine learning approaches try to extract and exploit similarities implicitly. Traditional methods like support vector machines or random forests use manually selected features, while recently proposed deep learning methods extract features during training. Finally, this paper discusses extending these methods to more recent video coding formats such as Versatile Video Coding (VVC) and AOMedia Video 1(AV1)

GERIATRIC PATIENT WITH REPETITIVE HYPOGLYCAEMIC EPISODES

Hypoglycaemia is one of the significant hospitalization reasons in elderly patients with diabetes mellitus. Concerns should increase in admission of such a case in the emergency room owing to a number of associated disorders which may contribute to the undesired consequences. An eighty-year-old diabetic woman who was on glimepiride therapy was brought to the emergency unit because of repeated episodes of hypoglycaemia. She was having Alzheimer's disease leading to forget the usual dose she was receiving that also gives rise to double the pill together with skipping the snacks. Age related changes in pharmacokinetics and the potential for adverse effects and drug interactions due to polypharmacy leading to interactions and less adherence to receive the right dose at the right time should also be considered when choosing appropriate pharmacological therapy. Geriatric patients require special considerations related to delayed response of counter-regulatory hormones to hypoglycaemia and associated conditions must be taken into consideration for a successful management program

Endobronşiyal lipomun bronkoskopik tedavisi: Olgu sunumu

WOS: 000385271000027Endobronchial lipomas are very rare tumors. Although surgery may be required in some cases, bronchoscopic removal is the preferred treatment modality. In this article, we present a case of endobronchial lipoma incidentally found after excision of a giant esophagus diverticulum. During follow-up of the patient, a tumor, located in the right lower lobe bronchus, was seen at thorax computed tomography. The tumor was excised via rigid bronchoscopy. This case highlights the effectiveness of rigid bronchoscopy in the management of endobronchial tumors.Endobronşiyal lipomlar çok nadir tümörlerdir. Bazı olgularda cerrahi gereksinimi olabilse de bronkoskopik çıkarma tercih edilen tedavi yöntemidir. Bu yazıda, dev bir özofagus divertikülünün eksizyonu sonrası tesadüfen saptanan bir endobronşiyal lipom olgusu sunuldu. Hastanın takibinde, toraks bilgisayarlı tomografide sağ alt lob bronşunda yerleşik bir tümör görüldü. Tümör, rijit bronkoskopi yoluyla eksize edildi. Bu olgu endobronşiyal tümörlerin tedavisinde rijit bronkoskopinin etkinliğini vurgulamaktadır

The maximum standardized FDG uptake on PET-CT in patients with non-small cell lung cancer

WOS: 000330181700001PubMed ID: 24148271Background: Non-small cell lung cancer (NSCLC) accounts for approximately 80% of new diagnoses of pulmonary carcinoma. This study investigated the correlation between 18 F-fluorodeoxyglucose uptake in computerized tomography integrated positron emission tomography and tumor size, lymph node metastasis, and distant metastasis in patients with NSCLC. Methods: The records of 151 NSCLC patients (139 male, 12 female; mean age 59.60 years) were evaluated retrospectively. Results: Forty-one cases were adenocarcinomas; 45 squamous cell carcinomas; and 65 unspecified NSCLC. When the cases were categorized according to tumor size (group 1, 3 and >= 5 cm; group 3, > 5 cm), the maximum standardized uptake value (SUVmax) was significantly lower in groups 1 and 2 compared with group 3 (p = 0.006 for each). Considering all cases, tumor SUVmax was not correlated with age, gender, or histopathological type. Lymph node metastases were pathologically proven in 24 cases: 24% of these were adenocarcinomas, 6% squamous cell carcinomas, and 16% unspecified NSCLC. Neither lymph node involvement nor distant metastases were correlated with tumor SUVmax, although lymph node size was positively correlated with lymph node SUVmax (r = 0.775; p < 0.001). Conclusions: SUVmax was significantly associated with tumor size, but not with distant metastases or lymph node involvement. Therefore, SUVmax on positron emission tomography is not predictive of the presence of metastases

Diagnostic value and safety of medical thoracoscopy in the management of exudative pleural effusion

WOS: 000391006500006Objective: Medical thoracoscopy is a minimally invasive procedure that is performed by experienced pulmonologists under local anesthesia and conscious intravenous sedation. It allows direct observation and evaluation of the pleural space. Our aim is to evaluate the diagnostic efficacy and safety of this procedure while presenting our results of medical thoracoscopy performed by rigid thoracoscopy in our clinic. Methods: Thirty-seven patients who had gone thorough medical thoracoscopy between March 2011 and August 2014 were evaluated retrospectively. Results: Of these 37 patients, 26 were male and the average age was 50.94 +/- 15.38 years. Fourteen patients had right-sided pleural effusion, whereas 23 had left-sided pleural effusion. Closed pleural biopsy was performed previously in 16 patients with no diagnostic results. In 36 patients (97.3%), a specific diagnosis was achieved. One patient, diagnosed as lymphocytic pleuritis by medical thoracoscopy, underwent decortication and the pathology was consistent with biphasic malignant pleural mesothelioma. Another patient, diagnosed as chronic nonspecific pleuritis with medical thoracoscopy, underwent decortication and the diagnosis was fibrinous pleuritis characterized by extensive fibrosis. Three patients had expansion defects during the post-operative period. Hemothorax occurred in one patient that died of respiratory failure on day 34 of hospitalization. The median length of stay in the hospital after the procedure was 5 days (1-34). Conclusion: Medical thoracoscopy is a secure procedure with high diagnostic value in the management of exudative pleural effusion

The relationship between Chlamydophila pneumoniae IgG titer and coronary atherosclerosis

Background: The role of Chlamydophila pneumoniae (CP) in the progression of atherosclerosis is controversial. Also no sufficient angiographic study is available about the impact of CP infection on severity and intensity of coronary atherosclerosis. We investigated the relation between CP IgG antibody titers and severity and intensity of coronary atherosclerosis Methods: The study population consisted of 516 consecutive patients who underwent a coronary angiography. The group included 353 patients who had coronary artery disease; a control group included 163 subjects with angiographically proven normal coronary arteries. Chlamydophila pneumoniae IgG antibody titers were measured by an enzyme immunoassay method in all patients. Gensini scores and extent scores were used to evaluate the angiographic extent and severity of atherosclerosis. Results: The mean value of IgG antibody titer was 44.3 ± 28.8 IU/ mL in the patients and 39.8±27.4 IU/mL in the control group (p = 0.14). There was no statistically significant correlation between the Gensini scores, extent scores and CP IgG titers (Gensini score: r = +0.103, p = 0.07, extent score: r = +0.110, p = 0.31). When we grouped the patients as high (> 50 IU/mL) and low (< 50 IU/mL) IgG antibody titers, the number of diseased coronary arteries was higher in patients with high IgG antibody titers (respectively: 2.6 ± 1.1 vs. 2.2 ± 0.8, p = 0.01). While the Gensini score was significantly higher in patients with high IgG antibody titers (7.5 ± 4.0 vs. 6.17 ± 4.0, p = 0.01), the extent score did not change with IgG titers (29.8 ± 15.9 vs. 25.8 ± 15.4, p = 0.08). Conclusions: In our study, we investigated the relation between CP infection and coronary atherosclerosis and found that CP IgG antibody titers are associated with the severity of coronary stenosis at higher antibody levels. However, there is no association between CP antibody titers and clinical presentation of coronary artery disease. We suggest that CP has limited effect on coronary atherosclerosis. Copyright © 2008 Via Medica

Endotracheal ectopic parathyroid adenoma mimicking asthma

Primary benign tumors of the trachea are uncommon. These tumors may cause tracheal occlusion and lead to a misdiagnosis of asthma. Ectopic parathyroid adenoma (EPA) can be seen anywhere between the mandibular angle and the mediastinum. The distal part of the trachea is a rare location for EPA, and EPA obstructing the endotracheal lumen has not been reported in the literature. We herein describe a 52-year-old female with a several-year history of asthma treatment who presented with progressive dyspnea. Computed tomography revealed a mass that was obstructing the tracheal lumen. Total mass excision was performed via endobronchial treatment, and pathologic examination revealed EPA