Lateral incisors versus canine areas for two implant placements used to retain mandibular overdenture: Periodic monitoring of ridge base contact relation

2020 ◽  
Vol 10 (2) ◽  
pp. 72
Author(s):  
KhloudEzzat Mourad ◽  
RadwaMohsen Kamal Emera ◽  
Wael Ahmed ◽  
Ahmed Habib
Author(s):  
Rose Emergo ◽  
Steve Brockett ◽  
Pat Hamilton

Abstract A single power amplifier-duplexer device was submitted by a customer for analysis. The device was initially considered passing when tested against the production test. However, further electrical testing suggested that the device was stuck in a single power mode for a particular frequency band at cold temperatures only. This paper outlines the systematic isolation of a parasitic Schottky diode formed by a base contactcollector punch through process defect that pulled down the input of a NOR gate leading to the incorrect logic state. Note that this parasitic Schottky diode is parallel to the basecollector junction. It was observed that the logic failure only manifested at colder temperatures because the base contact only slightly diffused into the collector layer. Since the difference in the turn-on voltages between the base-collector junction and the parasitic Schottky diode increases with decreasing temperature, the effect of the parasitic diode is only noticeable at lower temperatures.


2019 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
sara mohamed ◽  
nesrin elmahrouky ◽  
Hala Gamal el din ◽  
nahed abd elmoniem

2021 ◽  
pp. bmjmilitary-2021-001874
Author(s):  
Athanasios S Kotoulas ◽  
D Karamanavis ◽  
G Ι Lambrou ◽  
P Karanikas

IntroductionThe ongoing SARS-CoV-2 pandemic is a global health crisis which poses many psychological research challenges. The objective of this study was to evaluate the responsiveness and validity of depression, anxiety and stress in a representative cohort of Hellenic military personnel using the short version of the Greek military version of the Depression–Anxiety–Stress Scales-21 (DASS-21) questionnaire.MethodsA total of 158 participants were voluntarily surveyed using an electronically developed structured questionnaire. The anonymous e-questionnaire included a social demographic section and the DASS-21 scale section. It was distributed in September 2020 to the military personnel of the Hellenic Tactical Air Force Units using an intranet network during government restrictive measures due to the COVID-19 crisis.ResultsOur DASS-21 survey indicated a positive outcome at the psychometric level of our military sample population. Age, sex and systemic medications were statistically correlated with anxiety. Inter-correlations between the DASS-21 statements showed that individuals with low-level depression also experienced some degree of stress. Factor analysis indicated the reliability and validity of the questionnaire.ConclusionsThe low levels of depression and stress among our military sample population demonstrate the importance of periodic monitoring of the psychometric items of the DASS-21 subscales to design and implement psychological prevention strategies, especially during the ongoing and future healthcare crises.


2020 ◽  
Vol 09 (03) ◽  
pp. 163-167
Author(s):  
Arvind Krishnamurthy ◽  
Siva Shankar Behuria

Abstract Background Esophageal cancers (ECs) are more prevalent in the East Asian countries of the world, wherein squamous cell carcinomas (SCCs) are the predominant histological subtype. In contrast, the patterns in the West are a bit heterogeneous, with esophageal adenocarcinoma (AC) being the more frequent histological subtype. There is very sparse published Indian data pertaining to the demographic trends of ECs. Materials and Methods Our study was a retrospective analysis of the demographic trends of 917 patients afflicted with ECs who were managed at our center over a 10-year period. Results and Discussion EC accounted for nearly 4.1% of the total cancer burden managed at our center from January 2002 to December 2011. The mean age of our patient cohort was 54.2 years. The male:female ratio was nearly 1.7:1. Tobacco chewing was noted in 25.4%, smoking in 37%, while alcohol consumption was noted in approximately 20% of the patients. SCC was the most common histological subtype (78.3%), while ACs constituted only 9.9%. Eighty-nine percent of our patients presented with locally advanced staged tumors. Definitive chemoradiation was the most common modality of definitive management then; however, over the years, our preferred choice of the management of ECs has shifted to neoadjuvant chemoradiation, followed by surgery in the carefully selected patients of locally advanced resectable ECs. Conclusion Our study clearly shows SCC to be the most common histological subtype among ECs, a trend that has been observed in the vast majority of the East Asian nations. The epidemic rise in the incidence of esophageal ACs as seen in the West is not seen in our study. Periodic monitoring of the demographic trends of ECs is of great importance both for clinicians and policymakers. We hope that our study will enlighten both policy holders and clinicians to better channelize the efforts toward prevention and more effective management of this deadly cancer.


2019 ◽  
Vol 19 (1) ◽  
pp. 64-72 ◽  
Author(s):  
Helen-Maria Dounavi ◽  
Yiorgos Sfikas ◽  
Yiorgos Tsiatouhas

2012 ◽  
Vol 49 (11) ◽  
pp. 1267-1284 ◽  
Author(s):  
Olajide Samuel Oshati ◽  
Arun J. Valsangkar ◽  
Allison B. Schriver

Earth pressure data from the field instrumentation of a cast-in-place reinforced rectangular box culvert are presented in this paper. The instrumented culvert is a 2.60 m by 3.60 m double-cell reinforced cast-in-place rectangular box buried under 25.10 m of fill constructed using the induced trench installation (ITI) method. The average earth pressure measured across the roof was 0.42 times the overburden pressure, and an average of 0.52 times the overburden pressure was measured at mid-height of the culvert on the sidewalls. Base contact pressure under the rectangular box culvert was also measured, providing field-based data demonstrating increased base pressure resulting from downward drag forces developed along the sidewalls of the box culvert. An average increase of 25% from the measured vertical earth pressures on the roof plus the culvert dead load (DL) pressure was calculated at the culvert base. A model culvert was also tested in a geotechnical centrifuge to obtain data on earth pressures at the top, sides, and base of the culvert. The data from the centrifuge testing were compared with the prototype structure, and the centrifuge test results agreed closely with the measured field prototype pressures, in spite of the fact that full similitude was not attempted in centrifuge testing.


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