A CRITICAL REVIEW ON CLASSIFICATION AND TERMINOLOGY OF SCISSOR STRUCTURES

When the existing literature on the research of scissor structures is thoroughly investigated, it is seen that different researchers use different terminologies and classifications especially for the definition of the primary units and the motion type. Some of the studies define the whole geometry based on the geometric properties of the primary scissor units and the unit lines while some other studies define it according to the loops. All these studies use different names for similar elements. This article aims to review the literature on the classification and terminology of scissor structures and represent the state of art on the studies. Tables are represented showing all approaches in the literature. In addition, the article criticizes the missing points of each terminology and definition, and proposes some new terminology. In order to arrive at this aim, different definitions of the primary scissor units and motion types used in key studies in the literature are investigated thoroughly. With several examples, it is demonstrated that naming the scissor units according to the resulting motion type might be misleading and it is better to specify the motion type for the whole structure. A classification for transformation of planar curves is presented

Loop based classification of planar scissor linkages

Scissor linkages have been used for several applications since ancient Greeks and Romans. In addition to simple scissor linkages with straight rods, linkages with angulated elements have been introduced in the last decades. In the related literature, two methods have been used to design scissor linkages, one of which is based on scissor elements, and the other is based on assembling loops. This study presents a systematic classification of scissor linkages as assemblies of rhombus, kite, dart, parallelogram and anti-parallelogram loops using frieze patterns and long-short diagonal connections. After the loops are replicated along a curve as a pattern, the linkages are obtained by selection of proper common link sections for adjacent loops. The resulting linkages are analyzed for their motions and they are classified as realizing scaling deployable, angular deployable or transformable motion. Some of the linkages obtained are novel. Totally 10 scalable deployable, 1 angular deployable and 8 transformable scissor linkages are listed. Designers in architecture and engineering can use this list of linkages as a library of scissor linkage topologies

Characteristics of Patients With Rheumatoid Arthritis in Turkey: Results From the Turkish League Against Rheumatism Rheumatoid Arthritis Registry

Conclusion: The majority of patients with RA in Turkey are middle-aged homemakers. Despite the high rates of disease-modifying anti-rheumatic drugs use, the majority of patients had moderate and high disease activity. These findings indicate that treatment needs of RA patients are not met sufficiently

Efficacy and safety of an inactivated whole-virion SARS-CoV-2 vaccine (CoronaVac): interim results of a double-blind, randomised, placebo-controlled, phase 3 trial in Turkey.

Background CoronaVac, an inactivated whole-virion SARS-CoV-2 vaccine, has been shown to be well tolerated with a good safety profile in individuals aged 18 years and older in phase 1/2 trials, and provided a good humoral response against SARS-CoV-2. We present the interim efficacy and safety results of a phase 3 clinical trial of CoronaVac in Turkey

Correlations among enthesitis, clinical, radiographic and quality of life parameters in patients with ankylosing spondylitis

WOS: 000338636500018PubMed ID: 24252034Objectives. To investigate the relationship between enthesitis and disease activity, functional status, fatigue, joint mobility, radiological damage, laboratory parameter and quality of life in patients with ankylosing spondylitis (AS). Methods. A total of 421 patients with AS (323 male and 98 female) who were included in the Turkish League Against Rheumatism Registry were enrolled in the study. The Bath AS Disease Activity Index (BASDAI), fatigue, the Bath AS Functional Index (BASFI), the Bath AS Metrology Index (BASMI), the Maastricht AS Enthesitis Score (MASES), AS quality of life (ASQoL), the Bath AS Radiology Index (BASRI) and erythrocyte sedimentation rate (ESR) were evaluated. Results. Enthesitis was detected in 27.3% of patients. There were positive correlations between MASES and BASDAI, BASFI and fatigue (p < 0.05). MASES was not correlated with BASRI, BASMI, ASQoL and ESR. The mean MASES score was 1.1 +/- 2.4. The most frequent regions of enthesopathies were right iliac crest, spinous process of L5 and proximal to the insertion of left achilles tendon, respectively. Conclusions. Enthesitis was found to be associated with higher disease activity, higher fatigue, worse functional status and lower disease duration. As enthesitis was correlated with BASDAI, we conclude that enthesitis can reflect the disease activity in patients with AS.Pfizer CompanyThe authors express their gratitude to all members of the TRASD-IP AS Study group for their cooperation and to Pfizer Company for the registry sponsorship

Characteristics of Patients With Rheumatoid Arthritis in Turkey: Results From the Turkish League Against Rheumatism Rheumatoid Arthritis Registry

WOS: 000352060500003Objectives: This study investigates the demographic and clinical characteristics of patients with rheumatoid arthritis (RA) in Turkey, and attempts to identify strategies for the prevention, treatment, and support of RA. Patients and methods: A total of 2,359 patients (1,966 females, 393 males; mean age 51.6 +/- 12.5 years; range 18 to 75 years) with RA from 36 centers across Turkey, who were recorded in the Turkish League Against Rheumatism (TLAR) RA Registry between September 2007 and March 2011, were evaluated. Patients' demographic and clinical data were recorded. Disease activity, functional status, and radiographic damage were measured using the Disease Activity Score 28, the Health Assessment Questionnaire, and van der Heijde modified Sharp scoring method. Results: The mean duration of academic education received was 5.2 +/- 3.8 years, and 74.6% of the patients were homemakers. Non-biological disease-modifying anti-rheumatic drugs were used by 91.0% of the patients, while 10.2% used biological disease-modifying anti-rheumatic drugs. The mean Disease Activity Score 28, Health Assessment Questionnaire, and Sharp scores were 4.0 +/- 1.4, 0.38 +/- 0.37, and 31.2 +/- 57.1, respectively. Of the patients, 17.8% were in remission and 14.1% had low disease activity rates, while 42.7% and 25.5% had moderate and high disease activity rates. Conclusion: The majority of patients with RA in Turkey are middle-aged homemakers. Despite the high rates of disease-modifying anti-rheumatic drugs use, the majority of patients had moderate and high disease activity. These findings indicate that treatment needs of RA patients are not met sufficiently.Wyeth/Pfizer CompanyWyethThe authors express their gratitude to all members of TLAR RA Study Group for their cooperation and to Wyeth/Pfizer Company for the sponsorship

Characteristics of Patients With Rheumatoid Arthritis in Turkey: Results From the Turkish League Against Rheumatism Rheumatoid Arthritis Registry

Objectives: This study investigates the demographic and clinical characteristics of patients with rheumatoid arthritis (RA) in Turkey, and attempts to identify strategies for the prevention, treatment, and support of RA. Patients and methods: A total of 2,359 patients (1,966 females, 393 males; mean age 51.6 +/- 12.5 years; range 18 to 75 years) with RA from 36 centers across Turkey, who were recorded in the Turkish League Against Rheumatism (TLAR) RA Registry between September 2007 and March 2011, were evaluated. Patients' demographic and clinical data were recorded. Disease activity, functional status, and radiographic damage were measured using the Disease Activity Score 28, the Health Assessment Questionnaire, and van der Heijde modified Sharp scoring method. Results: The mean duration of academic education received was 5.2 +/- 3.8 years, and 74.6\% of the patients were homemakers. Non-biological disease-modifying anti-rheumatic drugs were used by 91.0\% of the patients, while 10.2\% used biological disease-modifying anti-rheumatic drugs. The mean Disease Activity Score 28, Health Assessment Questionnaire, and Sharp scores were 4.0 +/- 1.4, 0.38 +/- 0.37, and 31.2 +/- 57.1, respectively. Of the patients, 17.8\% were in remission and 14.1\% had low disease activity rates, while 42.7\% and 25.5\% had moderate and high disease activity rates. Conclusion: The majority of patients with RA in Turkey are middle-aged homemakers. Despite the high rates of disease-modifying anti-rheumatic drugs use, the majority of patients had moderate and high disease activity. These findings indicate that treatment needs of RA patients are not met sufficiently