Operation of Compressor and Electronic Expansion Valve via Different Controllers

WOS: 00039941330001

Serum Irisin Levels in Patients with Acute Atrial Fibrillation

Objective: The purpose of this research was to investigate whether changes in serum irisin levels can represent a marker of altered energy requirements in patients with acute atrial fibrillation (AF) undergoing cardioversion (CV). Methods: The research was planned as a randomized, prospective case-control study. Patients presenting to the emergency medicine and cardiology departments of a university hospital due to acute AF were included in the study. Irisin levels were measured from serum specimens collected 24 and 72 hours (h) following restoration of sinus rhythm with CV in patients in AF rhythm. The values obtained were then compared using statistical analysis. Results: Thirty-one patients undergoing CV due to acute AF were enrolled. Mean irisin levels were studied from serum specimens collected 24 and 72 h following restoration of sinus rhythm with CV, and were then compared. No statistically significant difference was determined at comparison of patients’ basal to 24 h, basal to 72 h, and 24 to 72 h mean irisin values (p0.734, p0.958, and p0.643, respectively). Negative correlation was determined between basal serum irisin levels and LDL (r= -0.519, p= 0.002), but no significant correlation was observed with epicardial adipose tissue (EAT) thickness. Conclusion: We determined no change in serum irisin levels studied 24 h and 72 h following return of normal sinus rhythm after CV from basal serum irisin levels in patients with acute AF. No correlation also was determined between serum irisin levels and EAT thickness

An assessment of marital adjustment in patients with rheumatoid arthritis

Aim To investigate marital adjustment in patients with rheumatoid arthritis and factors affecting this. Methods A total of 32 patients diagnosed with Steinbrocker class 1-2 rheumatoid arthritis and 32 healthy individuals from a similar age group were included. Sociodemographic characteristics, the Beck Depression Inventory (BDI), short–form 36(SF-36) and the dyadic adjustment scale (DAS) were evaluated in both groups. A visual analogue scale (VAS), the disease activity score 28 (DAS28) and a health assessment questionnaire (HAQ) were also investigated in the patient group. Results Mean ages were 46.5±9.2 years in the patient group and 47.7±8.1 in the control group (p=0.5). No significant difference was determined between the two groups in terms of sociodemographic characteristics. No statistically significant correlation was observed between erythrocyte sedimentation rate (ESR), patient and physician global VAS, DAS28, HAQ and morning stiffness and DAS total score. Comparison of DAS subunits revealed a significant difference in dyadic satisfaction and affectional expression in the patient and control groups (p=0.046 and p=0.037). A statistically significant negative correlation was observed between duration of the disease and marital adjustment (p=0.01;r= -0.58). Conclusion Due to its progressive and prolonged course rheumatoid arthritis can also affect individuals’ social relationships besides restricted daily living activities. Activation of rheumatoid arthritis did not affect marital adjustment in this study, but adjustment decreased with duration of the disease

Potential benefits of hyperbaric oxygen therapy on atherosclerosis and glycaemic control in patients with diabetic foot

Wstęp: Celem badania była ocena wpływu leczenia tlenem w komorze hiperbarycznej (HBOT, hyperbaric oxygen therapy) na kontrolę glikemii, czynniki ryzyka miażdżycy, wskaźniki zapalenia oraz inne kliniczne i laboratoryjne parametry u chorych z owrzodzeniem w przebiegu zespołu stopy cukrzycowej poddanych systemowej HBOT. Materiał i metody: Do badania włączono 28 chorych z owrzodzeniem stopy 2-4 stopnia według skali Wagnera. Wszyscy chorzy odbyli 30 sesji terapii 100-procentowym tlenem przy ciśnieniu 2,4 ATA przez około 105 minut, 5 razy w tygodniu. Zmierzono następujące parametry: glikemię na czczo, odsetek HbA1c, wskaźnik insulinooporności HOMA-IR, stężenie wysokoczułego białka C-reaktywnego (hs-CRP, high sensitivity C-reactive protein), stężenie kwasu moczowego, średnią objętość płytek krwi, a ponadto zbadano morfologię krwi i profil lipidowy. Wyniki: Po zakończeniu terapii stwierdzono istotną poprawę średnich wartości wszystkich badanych parametrów. Wnioski: Wykazano, że HBOT wpływa korzystnie na czynniki ryzyka miażdżycy i kontrolę glikemii u chorych na cukrzycę. Potrzebne są dalsze, prowadzone na szeroką skalę badania z randomizacją, aby ocenić ogólnoustrojowe efekty HBOT. (Endokrynol Pol 2010; 61 (3): 275-279)Introduction: The aim of this study was to investigate the effects of hyperbaric oxygen therapy (HBOT) on glycaemic control, atherosclerosis, inflammatory markers, and other clinical and laboratory parameters in patients undergoing systemic HBOT for diabetic foot ulcerations. Material and methods: Twenty-eight patients with Wagner grade 2-4 diabetic foot ulcerations were included. All patients were given 100% oxygen at 2.4 absolute atmosphere (ATA) for about 105 minutes, five times a week for a total of 30 sessions. Fasting blood glucose (FBG), haemoglobin A1c (HbA1c), homeostasis model measurement-insulin resistance (HOMA-IR), high sensitivity C-reactive protein (hs-CRP), uric acid, mean platelet volume (MPV), complete blood count, and lipid profile were tested. Results: Upon completion of treatment, a statistically significant improvement was observed in the mean values of all assessed parameters. Conclusions: HBOT was shown to have beneficial effects on atherosclerosis and glycaemic control in diabetic patients. Further large-scale randomized studies are needed to study the systemic effects of HBOT. (Pol J Endocrinol 2010; 61 (3): 275-279

Angiotensin IV improves spatial memory in streptozotocin-induced diabetic rats by reducing oxidative stress and altering BDNF levels

In this study, we investigated the protective effects of angiotensin IV (Mg IV) on cognitive function in streptozotocin (STZ)-induced diabetic rats. Male Wistar albino rats, were randomly divided into four groups; control (C), diabetes (Dia, 60 mg/kg, STZ, i.p.), Mg IV (5 mu g/kg, s.c.) and Dia+Ang W. The passive avoidance and Morris water maze (MWM) tests were used to evaluate learning and memory performance. Behavioral tests were carried out between 21 and 30 days after the initial Ang IV injection. Hippocampi were dissected and retained for biochemical and Western blot analysis. The Dia group exhibited the poorest behavioral results, while the Dia+Ang W group performed highest on the MWM task. Superoxide dismutase, glutathione peroxidase, and malondialdehyde levels increased significantly in the Dia group compared to Dia+Ang IV. Brain-derived neurotrophic factor (BDNF) and N-methyl-D-aspartate levels were significantly elevated, while levels of GABA(A) significantly decreased, in the Dia+Ang IV group compared to the Dia group. These findings suggest that peripheral administration of Ang IV ameliorated spatial memory in diabetic rats by decreasing hippocampal oxidative stress and BDNF levels

TÜRKMEN TÜRKÇESİNDE TASVİRİ FİİLLER ÜZERİNE ÖRNEKLİ ÇALISMA

Tezimizde Türkmen Türkçesinde tasvir fiilleri üzerinde örnekli çalısma yaptık. Türk lehçeleri tasvir fiilleri bakımından oldukça zengindir: Tasvir fiilleri, Türkçe'nin ifade gücünün ne kadar zengin olduğunu gösterir. Çalısmalarımız esnasında bu konuyla ilgili çok az çalısmanın yapılmıs olduğunu ve birçok meselenin tam anlamıyla aydınlatılamadığını gördük. Tasvir fiillerinin semantik, isimlendirme ve sayı bakımından tutarlı bir biçimde gruplandırılmadığını gördük. Biz tezimizde yirminci yüzyılda yazılmıs olan üç eserdeki tasvir fiillerini tespit ettik. Türkmen gramercilerinin konuyla ilgili görüslerini tespit ettik ve bunları da Türkiye Türkçesiyle karsılastırdık. İkisi arasındaki benzer ve farklı yönleri gösterdik. Metinlerde tespit ettiğimiz tasvir fiillerini ifade ettiklri anlamlara göre gruplandırdık. Gerek Türkiye Türkçesi gerekse Türkmen Türkçesinde yeterli çalısma yapılmadığı için çalısmamız sırasında sıkıntı çektik. Yapılacak olan yeni çalısmaların tasvir fiilleri konusuna katkı sağlayacağını umuyoruz.In the present thesis, we have provided an anological study on the descriptive verbs of Turkmen Turkish Language. Turkish Languages have great amount of descriptive verbs. Descriptive verbs demonstrate the phraseological richness of Turkish Language. During our studies, we also have found out that there were very few studies on this subject and most of the questions were not brought into the light. Also we have seen that descriptive verbs were classified consistently as regards to semantic, denomination and quantity. In the present thesis, we determined the descriptive verbs in three literature works which were written in twentieth century. We analized the arguments of Turkmen Grammarians and compared them with Turkey's Turkish. We demonstrated similarities and differences between them. the Descriptive verbs which have been determined in the texts, were classified according to their meanings. During our study, because of the fact that there were not enough studies that proived both in Turkish and Turkmen, we had difficulties. We hope that the new studies to be provided in the future, would contribute the subject Descriptive verbs

Chaotification of Real Systems by Dynamic State Feedback

WOS: 000288085900021Chaos - which, to the best of the knowledge of the authors, is the most complex behavior of deterministic dynamic systems is observed in many systems modeled by nonlinear ordinary or partial differential and difference equations. The vast amount of chaos literature is mainly devoted to the analysis and implementation of chaotic dynamics and to chaos control, i.e., the design of controllers changing the behavior of an originally chaotic system so that it possesses a stable equilibrium or limit cycle. Against the mainstream chaos studies in control, a new field, called "chaotification" (also called "chaos anti-control" or "chaotization") has emerged, in order to exploit chaotic behavior instead of escaping from it. This is inspired by limited but successful engineering applications of chaotic dynamics in cryptology, secure communication, and mixing of liquids. This paper presents a brief review of chaotic dynamics and chaos control. It also presents a novel chaotification method, which can be applied to any input state of a system that can be linearized, including linear controllable systems as special cases. The chaotification introduced - which is realized by a dynamic state feedback increasing the order of the open-loop system to have the same chaotic dynamics as a reference chaotic system - is used to "chaotify" a real dc motor to have the celebrated Lorenz chaotic dynamics

Microcontroller-Based Experimental Setup and Experiments for SCADA Education

WOS: 000284164700012In the field of automation technology, research and development for industrial applications has increased rapidly in recent years. Therefore, industrial automation and control education is a very important element of the industrialization process in developing countries, such as Turkey, which needs to keep abreast for the latest developments in the field. However, there are several challenges in industrial automation education in a developing country. First, a course that includes instrumentation and automation needs a significant budget. Moreover, the necessary instrumentation is generally confusing to use, which reduces the motivation of the students. Another challenge is that real industrial processes cannot be set up in the laboratory because these may be hazardous for students. To overcome these challenges, this paper gives a detailed description of some laboratory experiments in virtual-instrument-aided supervisory control and data acquisition (SCADA) systems. These experiments have been developed as part of implementing an inductive education strategy in the Automation Laboratory of Ege Vocational School, Ege University,. Izmir, Turkey. The experiments described here are designed to show how an economically feasible SCADA system could be built. The advantages and the challenging points of these experiments are also discussed and evaluated. A quantitative evaluation was achieved using a one-way ANOVA test performed on the exam results of the students. The qualitative evaluation was performed using a survey given to the students. The results indicated that the performance of the students was improved compared to the previous years' students

Comparison of different controllers for variable speed compressor and electronic expansion valve

WOS: 000280616000012This study deals with effects of different control methods on variable speed compressor (VSC) and electronic expansion valve (EEV) in a chiller system. The chiller system has a scroll type VSC and a stepper motor controlled EEV. Two different procedures were applied to control EEV and VSC: controlling each part individually while the other was set to a constant value and controlling both parts together using the same algorithm. Three different control algorithms such as proportional, integral, differential (PID), fuzzy logic and Artificial Neural Network (ANN) were experimented. In the first case, PID controller presented reasonable control solution for more stable SH and T(wo) values in the steady state. In the second case, ANN controller pair was selected to achieve minimum power consumption and more stable SH and T(wo) values against to a disturbance. In this manner, ANN controller showed lower power consumption of 8.1 percent and 6.6 percent than both PhD and Fuzzy controllers, respectively. (C) 2010 Elsevier Ltd and IIR. All rights reserved