Mems Tabanlı Kuvvet Algılayıcıları İle Mikro Newton Mertebesinde Ölçüm

Konferans Bildirisi -- Teorik ve Uygulamalı Mekanik Türk Milli Komitesi, 2013Conference Paper -- Theoretical and Applied Mechanical Turkish National Committee, 2013Nanoteknolojideki gelişmeler sayesinde mikro ve nano seviyesindeki küçük ölçeklerde kuvvet üretimi ve üretilen kuvvetin ölçülmesi hem endüstrinin hem de akademinin ilgi alanına girmektedir. Bu çalışmada önerilen kuvvet ölçümü sistemi, yekpare olarak üretilmiş bir yay sistemi ve üçlü algılayıcı elektrot geometrisinden meydana gelmektedir. Bu elektrot kümelerinden ikisi sabit, birisi hareketli durumdadır. Dış bir kuvvetten uygulanan tahrik sonucunda oluşan yer değiştirme, hareketli elektrot kümesinin sabit kümelere göre yer değiştirmesine sebep olur. Bunun sonucunda sistemde oluşan sığa değişimi, sabit elektrot kümelerine uygulanan ve 1800 faz farkına sahip olan AC gerilimi neticesinde hareketli plakadan DC gerilimi olarak okunur. Bu çalışmada en fazla 30 N kuvveti okuyabilen bir kuvvet algılayıcı tasarımı gerçekleştirildi. Tasarım kriterlerini kontrol etmek amacıyla sonlu elemanlar yazılımı ile yöntem doğrulaması sağlandı. Bir sonraki adım olarak, tasarımı yapılan kuvvet algılayıcı, mikro-üretim yöntemleri kullanılarak imal edilecektir.With the continuous advances in the field of nanotechnology, both force generation and force measurement techniques at micro and nano scales are widely employed in industry and academia. The proposed force measurement system of this work consists of a monolithic flexural part and a sensor with the three-electrode geometry, namely “tri-plate geometry”, for capacitive displacement sensing. One of these sets of electrodes is movable, whereas the remaining two are fixed. Displacement of the movable set of electrodes induced by an external source results in a capacitive difference in between movable and fixed set of electrodes. This displacement is then sensed on the movable stack as a DC voltage output by applying an AC voltage of 1800 phase difference to the two fixed electrode sets. In this study, we propose a design of a force sensor which is able to detect a maximum force of 30 N. To verify the design, finite element simulations are carried out and shown to be in agreement with the design criteria. As a final step, fabrication of the force sensor will be carried out

Initial Psychometric Evaluation of the Physical Health Attitude Scale and a Survey of Mental Health Nurses

INTRODUCTION: Nurses play an important role in improving the physical health of individuals with serious mental illnesses. The literature on the attitudes of mental health nurses towards physical healthcare provides a small amount of data. Assessing trends in nurses' attitudes through suitable surveys is important to ensure holistic care. AIM/QUESTION: This study sought to examine the Turkish version of the Physical Health Attitude Scale's (PHASe) validity and reliability and to survey Turkish mental health nurses' attitudes towards physical healthcare. METHOD: The sample consisted of 174 nurses working in acute psychiatric wards. Firstly, the psychometric properties of the scale were analyzed using factor analysis and measures of internal consistency and reliability. Then, the survey results of the attitudes of mental health nurses towards the physical health of patients with serious mental illnesses were determined using the Physical Health Attitude Scale (PHASe). RESULTS: The translated PHASe scale functioned best as a 24-item version and 4-factor solution that explains 51.3% of the variance. The internal consistency value was .83. The respondents' attitudes were generally positive about their role. There was less agreement for the involvement of nurses in practices of health promotion, such as sexual health, eye and/or dental examinations. The nurses surveyed also tended to use smoking for therapeutic purposes. IMPLICATIONS FOR PRACTICE: Mental health nurses' knowledge and attitudes should be enhanced by additional training in the ways of meeting patients' biopsychosocial needs. Obstacles to physical healthcare can be removed by implementing standard protocols nationwide. This article is protected by copyright. All rights reserved

Side-chain supramolecular polymers employing conformer independent triple hydrogen bonding arrays

Derivatives of thymine have been extensively used to promote supramolecular materials assembly. Such derivatives can be synthetically challenging to access and may be susceptible to degradation. The current article uses a conformer-independent acceptor-donor-acceptor array (ureidopyrimidine) which forms moderate affinity interactions with diamidopyridine derivatives to effect supramolecular blend formation between polystyrene and poly(methyl methacrylate) polymers obtained by RAFT which have been functionalized with the hydrogen bonding motifs

Childhood trauma and attachment styles among substance abusers in Turkey

Background: Early trauma exposure is well known to significantly increase the risk of developing a number of psychiatric disorders, especially addiction in adulthood. Literature has shown insecure attachment styles can be correlated with substance abuse. However, there is a lack of research on the relationship between childhood trauma and attachment styles among Turkish substance abusers. Objective: The aim of this study was to evaluate the childhood trauma and attachment styles of alcohol/substance abusers. Methods: A cross-sectional study was conducted from April 2014 to December 2015 in Ege University Department of Psychiatry alcohol/drug dependency unit. Participants included 289 substance abusers. All participants were assessed using a Childhood Trauma Questionnaire and Experiences in Close Relationships Scale. Analysis of variance, correlation and t-test were performed to determine childhood trauma and attachment styles among substance abusers. Data were collected from these 289 patients, and descriptive analysis was employed. While data on childhood trauma were collected using the Childhood Trauma Questionnaire, data on attachment styles were collected using the Experiences in Close Relationships Scale via a structured questionnaire. In order to determine the difference between the sociodemographic variables and childhood trauma score, t-and ANOVA tests were calculated. Pearson coefficient correlation was computed to assess the relationship between the childhood trauma scores and attachment style scores. Stepwise regression analysis was used to determine the effective variables on childhood trauma. Results: The mean age of the participants was32.5±11.0. Patients had higher scores in emotional abuse (31.22;SD 6.9) and emotional neglect (49.86; SD 8.4) subscales than in the other subscales in the Childhood Trauma Questionnaire. Patients with substance abuse reported high scores for anxious attachment style (65.20; SD20) in the Experiences in Close Relationships Scale. Sexual abuse subscale scores differed according to the duration of substance use (F = 2.61, p = 0.026). Substance abuse was significantly associated with childhood physical abuse (t=2.43, p=0.016) and sexual abuse (t=2.13, p=0.034). There were relationships between avoidant attachment and physical abuse (r=0.154, p=0.009), emotional abuse (r=0.131, p=0.025), physical neglect (r= 0.151, p=0.019), and emotional neglect (r=-0.151, p=0.010). Significant correlation was found between anxious attachment and emotional neglect via Pearson correlation analysis (0.226, p=0.001). Stepwise regression analysis reveals that both the age at which alcohol use started and avoidance attachment were strong predictors of physical abuse and physical neglect. Conclusions: Our study found that substance abuse was significantly associated with childhood physical and sexual abuse. Physical abuse, physical neglect, emotional abuse and emotional neglect were associated with avoidance attachment, while sexual abuse was associated with anxious attachment. The findings suggest that attachment may be an important factor to further understand and address alcohol/substance use among alcohol/substance users with a history of childhood trauma. Trauma therapy may help prevent relapses in alcohol/drug dependency. © Ethiopian Public Health Association

Sexual dysfunctions and related variables with sexual function in patients who undergo dialysis for chronic renal failure

Aims and objectives: To evaluate personality characteristics and psychological symptoms believed to have an effect on the sexual functions and performances of patients undergoing dialysis treatment. Background: Chronic renal failure is a life-threatening condition which can often have a poor prognosis. The loss of vital kidney function and other complications can affect almost all age groups. Design: A quantitative descriptive study. Methods: The study sample included 225 patients selected randomly from patients who have undergone dialysis treatment for at least 3 months at a dialysis centre in a university hospital. In this study, the Golombok Rust Inventory of Sexual Satisfaction (GRISS), the Eysenck Personality Inventory (EPI) and the Brief Symptom Inventory (BSI) were used. Results: In the correlation test, made to investigate the relation between the patients’ sexual satisfaction and their personalities, a significant positive relation was found between the communication subscale of the GRISS and the Lie dimension of the EPI, and a significant negative relation was found between the Communication subscale of the GRISS and the Lie dimension of the EPI, and between the Vaginismus and Orgasm subscales of the GRISS and the Extroversion dimension of the EPI. Conclusion: Results showed that sexual problems, in the areas of nonsensuality, anorgasmia, avoidance and communication, are associated with extroversion and psychological symptoms. Relevance to clinical practice: Sexual health and the psychological well-being of patients with renal failure is an important issue that should be considered in nursing practice. Nurses should take the psychological problems of patients and their relations with partners into account and consider these problems in a holistic manner within the framework of nursing practice. They would then be able to play an effective role in intervening at an early stage and would be better equipped to help and control the psychological and sexual problems that some patients may experience. © 2018 John Wiley & Sons Lt

Protection From Cylophosfamid Induced Ovarian Damage with Bone Marrow Derived Mezenchymal Stem Cells

68th Annual Meeting of the American-Society-for-Reproductive-Medicine (ASRM) -- OCT 20-24, 2012 -- San Diego, CA[No Abstract Available]Amer Soc Reprod Me

Autogenous Tooth Bone Graft and Simvastatin Combination Effect on Bone Healing.

OBJECTIVE: Autogenous tooth bone grafts (ATGM) are materials prepared from extracted teeth and have been used for bone augmentation. These graft materials are known to have similar structures and components to bone grafts. In this sense, this study aimed to evaluate all the tooth layers mixed with simvastatin without any demineralization process effect on bone formation. METHODS: In 60 Wistar albino rats, a standardized 6.0 m-diameter critical size bone defect was created in their calvarium. The study consists of 1 control and 4 experimental groups. In the control group (12 rats), the defects were left empty. The defects were grafted only with ATGM in Group 1, with ATGM mixed with simvastatin in Group 2, autogenous bone graft mixed with simvastatin in Group 3, and with xenogenic bone graft mixed with simvastatin in Group 4. The animals were sacrificed at the 7th and 28th days after operation. RESULTS: PCR, micro CT and histological results show that bone formation was enhanced in the experimental groups in comparison to the control group. Group 1 and Group 2 had similar bone formation rate when compared to Group 3 and Group 4 at the 28th day after operation. CONCLUSION: This study concludes that mineralized teeth may be used for defect reconstruction without any demineralization process. Autogenous mineralized tooth bone graft should be mixed with simvastatin for bone regeneration like other grafts