نتایج جستجو برای: aac

تعداد نتایج: 2637  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت دبیر شهید رجایی 1390

امروزه استفاده از مصالح ساختمانی سبک بسیار متداول شده است . در همین راستا بتن هوادار اتوکلاو شده (autoclaved aerated concrete) یا aac برای اولین بار در سال 1923 توسط یک آرشیتکت سوئدی اختراع گردید. از آن پس استفاده از این نوع بتن فوق سبک ابتدا در اروپا و سپس در آمریکا و دیگر نقاط جهان به صورت چشمگیری به عنوان یک نوع بتن غیر سازه ای افزایش یافت. با توجه به چگالی پایین این نوع بتن در مقایسه با دیگ...

Journal: :Seminars in speech and language 2008
Katherine C Hustad Kirsten Keppner Amanda Schanz Alycia Berg

This study sought to describe speech-language interventions for preschool-aged children who required augmentative and alternative communication (AAC) as provided by AAC experts and by general speech-language pathologists who were not AAC experts. The study also examined the types of technology used in AAC intervention by AAC experts. A retrospective chart review was conducted in which clinic re...

Journal: :Signal Processing 2014
Vladimir Britanak

Recently, the MPEG committee has completed the development of a new audio coding standard, the MPEG-4 Advanced Audio Coding-Enhanced Low Delay (AAC-ELD). The stateof-the-art MPEG audio coding standards, such as MPEG-4 AAC Low Complexity (AAC-LC), High Efficiency AAC (HE-AAC) and AAC Low Delay (AAC-LD), utilize for the time-tofrequency transformation of an audio block and vice versa, the well kn...

Journal: :BMB reports 2011
Yun-Tae Kim Ji-Hyun Jang Hyun-Chul Kim Hyogyeong Kim Kyoung-Ryul Lee Kyung Sun Park Hee-Joo Lee Young-Jin Kim

The aac(6')-Ib gene is the most prevalent gene that encodes aminoglycoside-modifying enzymes and confers resistance to tobramycin, kanamycin, and amikacin. The aac(6')-Ib-cr variant gene can induce resistance against aminoglycoside and fluoroquinolone simultaneously. Two main methods, sequence analysis and the restriction enzyme method, can detect the aac(6')-Ib-cr variant in clinical strains. ...

Journal: :Digestion 2014
Min Geun Gu Tae Nyeun Kim Jay Song Yoon Jeong Nam Jae Young Lee Jun Suk Park

OBJECTIVE Acute acalculous cholecystitis (AAC) is traditionally known to occur in critically ill patients and to have a poor prognosis. Although cholecystectomy is usually recommended for treating AAC, nonsurgical management may be a good alternative. The objective of this study was to review the incidence, risk factors, treatment modality, and therapeutic outcomes of AAC compared to acute calc...

Journal: :The Malaysian journal of medical sciences : MJMS 2011
Chee-Kin Hui

Inflammation of the gallbladder without evidence of calculi is known as acute acalculous cholecystitis (AAC). AAC is frequently associated with a poor prognosis and a high mortality rate. Thus, early diagnosis and prompt surgical intervention has been recommended to improve the outcome of AAC. Herein, I present a case report of AAC complicating laparoscopic appendicectomy. Unlike previous studi...

Journal: :Canadian Journal of Plant Science 2016

Journal: :Arteriosclerosis, thrombosis, and vascular biology 2014
Michael H Criqui Julie O Denenberg Robyn L McClelland Matthew A Allison Joachim H Ix Alan Guerci Kevin P Cohoon Preethi Srikanthan Karol E Watson Nathan D Wong

OBJECTIVE To evaluate the predictive value of abdominal aortic calcium (AAC) for incident cardiovascular disease (CVD) independent of coronary artery calcium (CAC). APPROACH AND RESULTS We evaluated the association of AAC with CVD in 1974 men and women aged 45 to 84 years randomly selected from the Multi-Ethnic Study of Atherosclerosis participants who had complete AAC and CAC data from compu...

Journal: :Antimicrobial agents and chemotherapy 1992
P N Rather R Mierzwa R S Hare G H Miller K J Shaw

The AAC(3)-V resistance mechanism is characterized by high-level resistance to the aminoglycosides gentamicin, netilmicin, 2'-N-ethylnetilmicin, and 6'-N-ethylnetilmicin and moderate resistance levels to tobramycin. Serratia marcescens 82041944 contains an AA(3)-V resistance mechanism as determined from aminoglycoside resistance profiles. This strain, however, does not exhibit hybridization wit...

2016
Yong Wei Juan Xu Genqing Zhou Songwen Chen Ping Ouyang Shaowen Liu

Renal denervation (RD) was reported to reduce the susceptibility of atrial fibrillation (AF), but the underlying mechanism has not been well understood. This study was performed to investigate the effect of RD on the inducibility of AF in a rabbit model for atrial fibrosis and to explore the potential mechanisms. Thirty-five rabbits were randomly assigned into sham-operated group (n = 12), abdo...

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