The Effect of Changes in the Radio-Ulnar Angle on Wrist Scores on the Treatment of Intra-Articular Fractures of the Distal Radius with Wrist Fixator

Aim: This study was aimed to evaluate the effect of radial inclination (RI) angle, assessed with radiological measurement, on the clinical outcomes of intra-articular fractures of the distal radius (IFDR) treated with closed reduction and penning type dynamic wrist fixator. Material and Methods: A total of 120 patients who underwent closed reduction and dynamic wrist fixation due to IFDR between 2012 and 2020 were retrospectively reviewed. The effects of the changes in RI on clinical outcomes according to Mayo wrist scoring (MWS) criteria were investigated by measuring the RI angles in anteroposterior wrist radiographs of the patients at postoperative 2nd, 6th, and 10th weeks. Results: According to the AO fracture classification, 77 (64.2%) of the patients had type C1 and 43 (35.8%) of the patients had type C2 fracture. The patients comprised 69 (57.7%) females and 51 (42.3%) males, and the mean age was 50.08±15.36 years. Fixators were removed at six weeks. RI angles measured at post-op week 10 were 20°-30° in 83 (69.1%) patients, 10°-19° in 32 (26.6%) patients, and 0°-9° in 5 (4.3%) patients. According to MWS, 39 (32.5%) patients were evaluated as excellent, 76 (63.3%) patients as good, and 5 (4.2%) patients as moderate. A statistically significant positive correlation was observed between RI values and MWS (r=0.369, p<0.001). Conclusion: Dynamic wrist fixation with closed reduction is a simple and minimally invasive method, and provides successful clinical and functional results in the treatment of IFDR. We consider that optimal RI angles are effective in clinical and functional outcomes

Semi-Supervised First-Person Activity Recognition in Body-Worn Video

Body-worn cameras are now commonly used for logging daily life, sports, and law enforcement activities, creating a large volume of archived footage. This paper studies the problem of classifying frames of footage according to the activity of the camera-wearer with an emphasis on application to real-world police body-worn video. Real-world datasets pose a different set of challenges from existing egocentric vision datasets: the amount of footage of different activities is unbalanced, the data contains personally identifiable information, and in practice it is difficult to provide substantial training footage for a supervised approach. We address these challenges by extracting features based exclusively on motion information then segmenting the video footage using a semi-supervised classification algorithm. On publicly available datasets, our method achieves results comparable to, if not better than, supervised and/or deep learning methods using a fraction of the training data. It also shows promising results on real-world police body-worn video

The predictive value of neutrophil-lymphocyte ratio and mean platelet volume in patients with colorectal carcinoma

Aim: This study aimed to investigate neutrophil-lymphocyte ratio (NLR) and mean platelet volume (MPV) for predicting colorectalcancer (CRC).Material and Methods: We investigated retrospectively patients who underwent colonoscopy. The study consisted of 75 patientswith CRC and 91 study participants with normal colonoscopy as control group, and MPV and NLR were compared between groups.MPV and NLR were also investigated for tumor stage and metastasis.Results: Among the CRC patients the mean NLR value (3.09 vs 2.26) and PLT count (287080 vs 251857) were significantly higher,whereas the mean MPV (9.62 vs 10.68 fL) and hemoglobin level (11.62 vs 14.18 g/dl) were significantly lower in the CRC group. WBCcount was not significantly different between the groups. Mean NLR in metastatic patients and non-metastatic patients were 3.56and 2.73, respectively (p:0.01).Conclusion: We showed that high NLR and low MPV are associated with CRC. Elevated NLR is related with presence of CRC and itcan be used for risk prediction. Although we found lower MPV levels, conflicting results about MPV in CRC prevents it from using asa marker in CRC

Reproducibility of endometrial intraepithelial neoplasia diagnosis is good, but influenced by the diagnostic style of pathologists

Endometrial intraepithelial neoplasia (EIN) applies specific diagnostic criteria to designate a monoclonal endometrial preinvasive glandular proliferation known from previous studies to confer a 45-fold increased risk for endometrial cancer. In this international study we estimate accuracy and precision of EIN diagnosis among 20 reviewing pathologists in different practice environments, and with differing levels of experience and training. Sixty-two endometrial biopsies diagnosed as benign, EIN, or adenocarcinoma by consensus of two expert subspecialty pathologists were used as a reference comparison to assess diagnostic accuracy of 20 reviewing pathologists. Interobserver reproducibility among the 20 reviewers provided a measure of diagnostic precision. Before evaluating cases, observers were self-trained by reviewing published textbook and/or online EIN diagnostic guidelines. Demographics of the reviewing pathologists, and their impressions regarding implementation of EIN terminology were recorded. Seventy-nine percent of the 20 reviewing pathologists' diagnoses were exactly concordant with the expert consensus (accuracy). The interobserver weighted kappa values of 3-class EIN scheme (benign, EIN, carcinoma) diagnoses between expert consensus and each of reviewing pathologists averaged 0.72 (reproducibility, or precision). Reviewing pathologists demonstrated one of three diagnostic styles, which varied in the repertoire of diagnoses commonly used, and their nonrandom response to potentially confounding diagnostic features such as endometrial polyp, altered differentiation, background hormonal effects, and technically poor preparations. EIN diagnostic strategies can be learned and implemented from standard teaching materials with a high degree of reproducibility, but is impacted by the personal diagnostic style of each pathologist in responding to potential diagnostic confounders

Investıgatıon Of Causes Of Ammunıtıon Accıdents And Rısk Analysıs Of Ammunıtıon Storage

Bu çalışmanın amacı mühimmat kazalarının nedenlerini incelemek, kazaların önlenmesi için önerilerde bulunmak ve bu konuda ileride yapılacak çalışmalara ışık tutmaktır. Bu maksatla mühimmat kazaları hakkında yapılan bazı çalışmalar ve geçmişten günümüze Türkiye'de ve diğer ülkelerde meydana gelmiş önemli mühimmat kazaları incelenmiş, ayrıca Lübnan'da konuşlu bulunan ve 40 ayrı ülkeden subay-astsubayın görev yaptığı Birleşmiş Milletler Geçici Görev Kuvvetinde (UNIFIL) görev yapan askeri personele anket uygulanmış ve Türkiye'de bu alanda uzman kişilerin görüşleri alınmıştır. Ayrıca bu tezde; yurt dışındaki bir mühimmat depolama sahasında mühimmat yönetim sürecini oluşturan ana fonksiyon alanlarından, kullanıcı birlik seviyesinde kazalar açısından kritik olduğu değerlendirilen mühimmatın depolanması, sayımı, bakımı, elden geçirilmesi alanlarında Ön Tehlike Analiz Formu (ÖTA) yöntemi kullanılarak tehlikelerin incelenmesi ve risk değerlendirmesi yapılmış ve bir kaza üzerinde de Hata Ağacı Analizi icra edilmiştir. İstatistiksel sonuçlara göre mühimmat kazalarının nedenleri altı kategori altında toplanmıştır. Bunlar: Yetersiz ve emniyetsiz depolama koşulları (%30), İnsan hataları (%29), Mühimmatın emniyetsiz taşınması ve elden geçirilmesi (%13), Talimatlara uyulmaması (%11), Mühimmat tasarım ve üretim hataları (%9) ve Yaşlı mühimmat ve mühimmatın fiziksel veya kimyasal durumunun kötüleşmesidir (%8). Bu kategoriler altında yangın (%10), mühimmatın kendi kendine ateşlemesi (%6), yetersiz güvenlik /sabotaj (%7) ve yetkisiz kurcalama (%6) yüksek oranlara sahip olan sebeplerdir. Risk değerlendirmesi sonucunda, mühimmatın depolanması sürecinde tespit edilen tehlikelerin başlangıçta %77 olan kabul edilemez risk oranının, önerilen önleyici tedbirler ile %0'a düşmesi, kontrollü olarak kabul edilebilir risk oranının %86 olması ve hiçbir tedbire gerek olmadan kabul edilebilir risk oranının %14 olması beklenmektedir. Çalışmanın sonucunda mühimmat kazalarının önlenmesi için önerilerde bulunulmuştur.The purpose of this study is to investigate causes of ammunition accidents and to make suggestions for the prevention of these accidents. For this reason, some studies about ammunition accidents and some major ammunition accidents which took place in Turkey and in the other countries were investigated, and also a questionnaire was administered to military personnel from 40 different countries who were working in United Nations Interim Force in Lebanon (UNIFIL), and opinions of some experts in this field in Turkey were taken. Additionally, a risk assessment study, Preliminary Hazard Analysis (PHA), was carried out in an abroad ammunition storage area in some major areas of ammunition management system like storage, counting, maintenance and handling of ammunition, which are considered to be critical for accidents at the user level. Also Fault Tree Analysis was conducted on an accident. Like all scientific research's indirect goal, this research is expected to pave the way for other studies that will be made in the future. The causes of ammunition accidents were gathered under six categories: Poor and unsafe storage conditions (30%), Human errors (29%), Unsafe movement and handling of ammunition (13%), Failure to follow instructions (11%), Ammunition design and manufacturing faults (9%), Old ammunition and deterioration of ammunition's physical and chemical situation (8%). Under these categories, "Fire" (10%), Auto-ignition of propellant" (6%), "Poor security / sabotage" (7%) and "Unauthorized tampering" (6%) have high percentages. According to the results of risk analysis, after suggested preventive measures, the scenarios with unacceptable risk are expected to decline from 77% to 0%, and these with acceptable under control ratio is expected to become 86%, and the ratio of acceptable ones without any measure is expected to become 14%. At the end of the study, some suggestions were made for the prevention of ammunition accidents

Polybrominated methoxy- and hydroxynaphthalenes

Tunç, Tuncay (Aksaray, Yazar)Regio- and stereoselective synthesis are described for convenient preparation of hydroxy- and methoxynaph-thalenes starting from naphthalene (1).cis,cis,trans-2,3,5,8-Tetrabromo-4-methoxy-1,2,3,4-tetrahydronaphthalen-1-ol(6),cis,cis,trans-2,3,5,8-tetrabromo-1,4-dimethoxy-1,2,3,4-tetrahydronaphthalene (7), andcis,cis,cis-2,3,5,8-tetrabromo-1,4-dimethoxy-1,2,3,4-tetrahydronaphthalene (8) were obtained with silver-induced substitution oftrans,cis,trans-1,2,3,4,5,8-hexabromo-1,2,3,4-tetrahydronaphthalene (3). Base-promoted aromatization of dimethoxides7and8afforded3,5,8-tribromo-1-methoxynaphthalene (9) and 2,5,8-tribromo-1-methoxynaphthalene (10). The reaction of6withsodium methoxide formed compounds10and 3,5,8-tribromonaphthalen-1-ol (16). Bromination of9and16withBr2in dichloromethane at room temperature produced 2,3,5,8-tetrabromo-1-methoxynaphthalene (14) and 2,3,4,5,8-pentabromonaphthalen-1-ol (18), respectively, while compound10did not react in the same conditions. Pyridine-inducedelimination of hexabromide3afforded 1,4,6-tribromnaphthalene (21) in 99% yield and thermolysis of the hexabromide3gave mainly 1,4,6,7-tetrabromonaphthalene (22). Tetrabromide22was transformed to 1,4,6,7-tetramethoxynaphthalene(23) by copper-assisted nucleophilic substitution reaction...

Investigation of Turkish mathematics teachers’ proficiency perceptions in using information and communication technologies in teaching

The purpose of this study is to investigate the perceived information and communication technologies (ICT) proficiency of Turkish mathematics teachers in teaching. This study was conducted using descriptive survey method. The study group consisted of 242 mathematics teachers working at middle (5th - 8th grade) and high schools (9th - 12th grade) in Turkey. The data were collected via “Personal Information Form” and “Perceived Information and Communication Technologies Proficiency Scale” developed by the researchers of this study. Data were analyzed with descriptive statistics, independent samples t-test, ANOVA and Pearson correlation test. As a result of the research, it was found that while Turkish mathematics teachers use ICT mostly for social media and communication purposes, they have insufficient knowledge and experience of ICT usage for teaching purposes. It was found that perceived proficiency of mathematics teachers’ in ICT usage did not significantly differ in terms of gender, while significant differences were found in terms of their years of professional experiences, teaching level and having training on computer-assisted instruction (CAI). It was also revealed that there was a significant positive correlation between perceptions of mathematics teachers’ proficiency in using ICT and their frequency of using Computer Assisted Instruction and smart board. It was suggested to organize in-service training activities for teachers on software and using ICT in teaching. © 2019, Springer Science+Business Media, LLC, part of Springer Nature

Functionalization of anthracene: A selective route to brominated 1,4-anthraquinones

Efficient and stereoselective syntheses are described for the preparation of 2,3,9,10-tetrabromo-1,4-dimethoxy-1,2,3,4-tetrahydroanthracenes 7, 8 and the corresponding 1,4-diol 17 by silver ion-assisted solvolysis of hexabromotetrahydroanthracene 6. Base-promoted aromatization of 7 and 8 afforded synthetically valuable tribromo-1-methoxyanthracenes 10 and 11. The reaction of 17 with sodium methoxide generated tribromodihydroanthracene-1,4-diol 27, whose oxidation with PCC gave 2,9,10-tribromoanthracene-1,4-dione (28). Therefore a selective and efficient method was developed for the preparation of compound 28 starting from 9,10-dibromoanthracene (1), in a simple four-step process. Compounds 10 and 11, and diol 27 constitute key precursors for the preparation of functionalized substituted anthracene derivatives that are difficult to prepare by other routes. The studies also reveal the broad range of reactivity and selectivity of the stereoisomeric anthracene derivatives

Autoimmune hepatitis as an overlap of secondary antiphospholipid syndrome

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