Performance Analysis of An Experimental Micro Flexible Manufacturing System (FMS)

Due to advanced technology, it is very important the performance of FMS for sensivity, production quality, repeatability and energy consumptions. Flexible manufacturing systems (FMSs) are the most automated and technologically sophisticated of the machine cell types used to implement cellular manufacturing. An FMS usually has multiple automated stations and is capable of variable routings among stations, while its flexibility allows it to operate as a mixed model system. The FMS concept integrates many of the advanced technologies that we met in previous units, including flexible automation, CNC machines, distributed computer control, and automated material handling and storage. In this experimental investigation, vibration and accelerations analysis of an experimental FMS with 5 degrees of freedom robot manipulator are presented. Firstly, experimental measurement of accelerations and vibrations are trained with a vibration measurement system and sensors. However, the process of production of part is a cycle of exact production time

Reliability and validity of the Turkish version of the Performance-Oriented Mobility Assessment I

The Performance-Oriented Mobility Assessment (POMA)-I is widely used assessment tool for evaluation of balance and gait properties. The aim of this study was to translate POMA-I to Turkish and to assess its reliability and validity. People with amputated lower extremities using prosthetics, those who underwent orthopedic surgery within the last 6 months, those dependent on wheel chairs and also bed-ridden patients, subjects with dementia and Alzheimer's disease, and illiterate people were excluded. After translation into Turkish, the Turkish version of the scale was applied on the participants at 2-week intervals. Volunteers ≥65 years of age were enrolled in the study. Internal consistencies of POMA subscale scores of postural balance and gait, and total score were calculated using Cronbach's α coefficient. The Turkish version was evaluated with respect to inter- and intrarater reliability and test-retest reliability intraclass correlation coefficient (ICC). For validation, Pearson's correlation coefficient between POMA and Berg Balance Scale (BBS) and Timed Up and Go Test (TUGT) was estimated. Eighty participants enrolled in the study with a mean age of 76. 5 ± 6. 75 years. In the reliability evaluation of the scale, considering postural balance, gait, and total score, Cronbach's α coefficients were found to be 0. 72, 0. 83, and 0. 88, respectively. ICCs were detected above 0. 70 for test-retest reliability and also for interrater and intrarater reliability. In validation study POMA total score had a strong positive correlation with BBS total score (r = 0. 86, p<0. 0001), and also a negative correlation with TUGT (r = -0. 75, p < 0. 0001). According to the results of this study, the Turkish version of the POMA-I scale has been found to be a reliable and a valid scale for elderly Turkish people. © 2012 European Group for Research into Elderly and Physical Activity (EGREPA)

Evaluation of the Social Studies Classes' Learning Environments from the Constructivist Viewpoint: Students' Perceptions

Bu araştırmada genel olarak sosyal bilgiler dersi öğrenme ortamlarının öğrenci görüşlerine göre yapılandırmacı özellikler açısından değerlendirilmesi amaçlanmıştır. Bu amaca uygun olarak araştırma tarama modeline göre tasarlanmıştır. Araştırmada veriler, 2030 beşinci sınıf öğrencisinden toplanmıştır. Araştırmada özetle (1) Sınıf mevcudu, anne ve baba eğitim düzeyi ve okulların genel veli profili için belirtilen sosyo-kültürel düzeyi, öğrencilerin sosyal bilgiler dersi yapılandırmacı öğrenme ortamlarına ilişkin algılarında ve bu tür ortamları tercihlerinde etkili bir faktör olarak bulunmuştur, (2) Öğrenciler; cinsiyetleri, sınıf mevcutları, anne ve baba eğitim düzeyleri ve okullarının genel veli profili için belirtilen sosyo-kültürel düzeyi ne olursa olsun sosyal bilgiler derslerinde sınıflarında var olandan daha fazla yapılandırmacı öğrenme ortamı istemektedirler.The main purpose of this study was to evaluate the elementary school social studies learning environments from the constructivist viewpoint according to students' opinions. For this aim, the study was designed in descriptive research method. The data in the study was gathered from 2030 fifth grade students. The main results of the study are (1) Class size, mother and father education levels, and general parent-profile described for the socio-cultural status of their schools were found as effective factor on students' perceptions about constructivist learning environments and on preferences of constructivist learning environments in the social studies classes, (2) Whatever students' gender, class sizes, mother and father education levels, and general parent-profile described for the socio-cultural status of their schools were, students wanted more constructivist learning environments in the social studies classes than they perceived

Influence of Particle Size on the Structure and Properties of 316L Hollow Fiber Membranes Sintered Under Argon Atmosphere

316L based stainless steel hollow fiber membranes (HFs) are used as an alternative for polymer and ceramic based membranes. Application areas of 316L hollow fiber membranes are applications such as support or particle filter of gas and liquid separations in chemical and waste treatment industries. Among various methods, dry-wet spinning technique was selected as the production method of hollow fiber membranes since it is the most popular one. The aim of the study is to produce hollow fiber membranes in different powder particle sizes (coarse, fine, and their mixture), and to examine their structure and also their properties such as chemical compositions, pore amount, average pore size, and pore distribution. 3-point bending tests were also used to determine their mechanical properties. HFs produced from fine particles show higher densification than coarse particle size samples. In terms of pore structure, mixed particle size yields lower porosity and pore size than the finest particle size. On the other hand, the finest particle size yields the highest bending strength and bending deflection

Laparoscopic cholecystectomy technique in a patient with situs inversus totalis

Situs inversus totalis is a rare congenital anomaly. It mayproduce difficulties in diagnosis and therapeutic managementof abdominal pathology, particularly in laparoscopicsurgery because of the mirror-image anatomy. Here wereport a case of situs inversus totalis and cholelithiasissuccessfully treated laparoscopically.Key words: Situs inversus totalis, cholelithiasis, laparoscopiccholecystectom

Congenital double lip deformity: presentation of eight cases

Dogumsal çift dudak nadir rapor edilen, ancak sık görülen bir anomalidir. Bu klinik durum sıklıkla izole bir deformite olarak görülse de, bir sendromun parçası da olabilir. Sıklıkla erkeklerde görülen ve patogenezi embriyolojik gelisimdeki defektlerle açıklanmaya çalısılan bu deformite ile ilgili olarak literatürde yirmiden az sayıda yayınlanmıs çalısma vardır. Bizim çalısmamızda, kadın erkek sayısı esit olup olguların hepsi estetik yakınmalarından dolayı doktora basvurmuslardır. Olguların hepsine lokal anestezi altında eliptik eksizyon yapılmıstır. Alınan cerrahi örneklerin patolojik incelemeleri normal dudak mukozası olarak rapor edilmistir. Olguların hiçbirinde post-operatif erken yada geç komplikasyon görülmeyip istenilen kozmetik sonuç elde edilmistir. Bir olguda parsiyel çift dudak deformitesi saptanmıs olup, bilgilerimize göre literatürde parsiyel çift dudak deformitesine ait bir yayın yoktur. Sonuç olarak bu çalısmada, dogumsal çift dudaga sahip toplam 8 olgu sunulmus ve bu deformitenin etyolojisi, görülme sıklıgı ve tedavi yöntemleri literatürdeki bulgular esliginde tartısılmıstır.Although congenital double lip deformity is not an uncommon condition, this deformity was presented rarely in the literature. Congenital double lip deformity may be present either as an isolated anomaly or a component of a syndrome. However less than twenty reports were presented in the literature, males were affected predominantly and pathogenesis of this deformity was explained by the embryological defects. In our study male to female ratio was equal and all patients were operated since the aesthetical reason. Elliptical excision was performed under the local anesthesia in all patients. All specimens were evaluated pathological and reported as “normal lip mucosa”. There were no early or late post-operative complication and aesthetical results were achieved in all patients. One case of our patients had partial congenital lip deformity, best of our knowledge; there was no data about the partial congenital lip deformity. Finally, in this study we present eight cases with congenital double lip and discuss the etiology, incidence and treatment modalities according to the data presented in the literature

The chemical composition of Salvia euphratica Montbret & Aucher ex Benth. essential oil from Sivas-Turkey

Previously, only the fatty-oil composition of Salvia euphratica Montbret & Aucher ex Benth. (syn. Salvia euphratica var. euphratica) was reported, however, there are no other studies on the chemistry of this species [1]. Up to now, there are no reports on the essential-oil composition of this taxon. In this study, we aimed to investigate the composition of three different samples of the essential oil of S. euphratica collected in June 2017 from two different sites in Sivas-Turkey. The essential oil was obtained by hydrodistillation from air-dried aerial parts of the plant using a Clevenger-type apparatus for the duration of 3 h. The essential-oil yields for the three samples were determined to be: 0.25, 0.15, and 0.13% (v/v), for a sample with glandular hairs (1) and a sample without glandular hairs (2) from location 1 and for a sample with glandular hairs (3) from location 2, respectively. The oils were diluted with n-hexane 1:10 (v/v) and analyzed as such on an Agilent 5977 MSD GC-MS system operating in the EI mode injector and MS transfer line temperatures were set at 250 °C. Splitless injection was used in the analysis. Innowax FSC column (60 m x 0.25 mm, 0.25 µm film thickness) and helium, as the carrier gas (1 mL/min), were used in GC-MS analyses. The oven temperature program was: 60 °C for 10 min and then raised to 220 °C at a rate of 4 °C/min, afterwards the temperature was kept constant at 220 °C for 10 min and then raised to 240 °C at a rate of 1 °C/min. Mass spectra were recorded at 70 eV with the mass range m/z 35-425. Relative amounts of the separated compounds were calculated from the integration of the peaks in MS chromatograms. The main components of sample 1 essential oil were 1,8-cineole (20.7%), camphor (10.0%), nopinone (4.7%), trans-pinocarveol (4.3%), myrtenal (4.3%), β-pinene (3.3%), and camphene (2.2%). Sample 2 oil contained high amounts of 1,8-cineole (13.5%), camphor (7.6%), trans-pinocarveol (7.1%), myrtenal (5.7%), nopinone (4.6%), myrtenol (3.9%), borneol (3.4%), and pinocarvone (3.2%). Finally, the main components of sample 3 oil were: 1,8-cineole (16.8%), trans-pinocarveol (4.7%), camphor (4.0%), myrtenyl acetate (3.7%), myrtenal (3.6%), linalool (2.8%), trans-linalool oxide (furanoid) (2.6%), and myrtenol (2.6%). The highest noted AChE-inhibitory activity of the oils were 63±5%, 57±2%, and 63±1%, respectively

The composition of the essential oil of the aerial parts of an endemic new species Ferula mervynii Sağıroğlu & H.Duman from Turkey

In 2007, Ferula mervynii Sağıroğlu & H.Duman (Apiaceae) was reported as a new species from Turkey. This species finds a natural habitat in Artvin and Erzurum regions that are located in North-Eastern Anatolia [1]. Up to now, there are no reports on the chemistry of this species. However, there are many reports on the essential-oil composition of other Ferula species from Turkey. As an example, F. elaeochytris Korovin essential oil was reported to have nonane (27.1%), α‐pinene (12.7%), and germacrene B (10.3%) as the main components [2], whereas, F. szowitziana D.C. was reported to contain β-eudesmol (32.0-29.5%), α-eudesmol (18.2-16.6%), and α-pinene (8.6-6.4%) as the major components of the leaf and stem oils, respectively [3]. The current study aimed to provide information on the chemistry of the essential oil of F. mervynii collected from Erzurum, Turkey, in August 2017. The essential oil was obtained by hydrodistillation from air-dried aerial parts of the plant using a Clevenger-type apparatus in the duration of 3 h. The essential-oil yield was determined to be 0.56% (v/w). The oil was diluted with n-hexane 1:10 (v/v) and analyzed as such on an Agilent 5977 MSD GC-MS system. Relative amounts of the separated compounds were calculated from the integration of the peaks in MS chromatograms. Identification of essential-oil components was carried out by comparison of their retention indices (RI), relative to a series of n-alkanes (C5 to C30), with the literature values, as well as by mass spectral comparison. The aerial parts essential oil of F. mervynii was rich in monoterpenes. The major components were α-pinene (48.1%), sabinene (20.0%), β-pinene (11.6%), and terpinen-4-ol (2.5%). The highest AChE-inhibitory activity of the oil was found to reach 51±1% of inhibition of the enzyme activity