EVALUATION OF PIPE CUTTING TECHNOLOGIES IN SHIPBUILDING

Pipes are the most significant ones of the components which constitutes the vessel body. Pipes are fabricated in piping plant at shipyard and exposed to some processes such as cutting, bending, hydrostatic tests, galvanizing and so on. Cutting operation is also vital process among the other ones since it is very crucial that the cutting surfaces are flat and the right angles. In shipyards, there are various pipe cutting methods such as plasma, oxygen, metal saw, band saw and abrasive cutting wheel. Shipyard production department desires to implement the most appropriate pipe cutting method in order to operate properly and effectively. The purpose of this study is to present the most convenient pipe cutting method according to the determined criteria. For this, fuzzy TOPSIS technique which is one of the most used fuzzy Multiple Criteria Decision Making (MCDM) methods in the literature is employed. The importance degrees of the criteria are evaluated by using fuzzy AHP. As a result of the presented study, the most appropriate pipe cutting method is determined for ship building industry

Is oral lornoxicam effective in the treatment of acute migraine attacks? : a randomized-controlled study

The aim of this study was to assess the efficacy of lornoxicam (LNX) in the treatment of acute migraine attacks. Material and Methods: This prospective, randomized, double-blind, placebo-controlled trial was conducted administering either LNX or placebo to patients who were diagnosed with migraine without aura according to the International Headache Society (the year 2004) criteria between 2010 and 2012 Results: Of 44 patients with 120 migraine attacks, 38 were female and rest were males. Mean age was 37.75 ± 9.28 years. Patients recorded using LNX in 87 migraine attacks and placebo in 33 migraine attacks, respectively. Pain intensity scores of the patients were found similar between LNX and placebo groups, statistically. Conclusion: Although oral LNX was found to have efficacy similar to placebo statistically in the treatment of acute migraine attacks, further studies are needed to evaluate appropriately the efficacy of LNX for treatment of acute migraine attacks

MRT Diagnostik entzündlicher Erkrankungen von Knochen, Gelenken und Weichteilen im Kindesalter : Einfluss altersspezifischer Risikofaktoren

Grundlagen: Muskuloskelettale Infektionen kommen in der Kindheit häufig vor und betreffen unterschiedliche Bereiche des Gewebes. Eine schnelle Diagnose und exakte Lokalisierung ist hierbei von entscheidender Bedeutung, um ernsthafte und schädliche Komplikationen zu vermeiden. Eine genaue Diagnose wird durch die unspezifischen, klinischen Symptome der Krankheitheiten erschwert. Zielstellung: Ziel dieser Arbeit war es die MRT-Diagnostik bei Kindern mit unspezifischen klinischen Zeichen akuter entzündlicher Veränderungen des muskuloskelettalen Systems zu evaluieren und das altersspezifische Spektrum an radiologischen Befunden unter Berücksichtigung von Risikofaktoren und anderen Erkrankungen, welche entzündliche Erkrankungen imitieren können, zu charakterisieren. Material und Methoden: Insgesamt wurden 210 Kinder mit der MR-Bildgebung untersucht. Die Patienten wurden in Altersgruppen und potenziellen Risikofaktoren für die entprechenden muskuloskelettalen Infektionen unterteilt und ausgewertet. Die Ergebnisse der MR-Studien wurden analysiert und mit den klinischen und histologischen Daten in Korrelation gebracht. Ergebnisse: Wir fanden ein MR-Korrelat einer muskuloskelettalen Infektion bei 146 Kindern. Osteomyelitis und Arthritis waren bei unserer Studie die häufigsten MR-Befunde. Primäre Infektionen der Weichgewebe wurden eher selten dokumentiert. In den diversen Altersgruppen kamen die untersuchten Erkrankungen in unterschiedlicher Häufigkeit vor. 17 Patienten zeigten nicht-entzündliche pathologische Entitäten. 47 Patienten zeigten unauffällige MRT-Aufnahmen. Schlussfolgerung: Infektionen des muskuloskelettalen Systems zeigen in der Kindheit unterschiedliche Präferenzen in den Altersgruppen und sind oft mit altersspezifischen Risikofaktoren verbunden. Aufgrund unspezifischer, klinischer Symptomatiken der Erkrankungen bei Kindern ist die MR-Bildgebung von entscheidender Bedeutung, um eine genaue Diagnose zu stellen und so eine effektive Behandlung einzuleiten.Background: Musculoskeletal infections are common in childhood and affect various types of tissues. A rapid diagnosis and precise localization are on this occasion of great importance to avoid serious and damaging complication. An accurate diagnosis is impeded by the unspecific clinical indications of diseases. Objective: Purpose of this thesis was to evaluate the MR-diagnostic of children with unspecific clinical signs of urgent inflammatory changes of the musculoskeletal system and to characterise the age-specific spectrum of MR-findings in consideration of risk factors and other diseases which may imitate inflammatory diseases. Material and methods: A total of 210 children were examined with MR-imaging. The patients were divided and evaluated corresponding to musculoskeletal infections in age groups and potential risk factors. The results oft the MR-studies were analysed and correlated with clinical and histological data. Results: We found an MR-correlate of a musculoskeletal infection among 146 children. In our study osteomyelitis and arthritis were the most common MR-findings. Primary infections of the soft tissue were less frequently documented. Examined diseases of various age groups occured in varying frequency. A total of 17 patients were diagnosed with non-inflammatory pathological entites. 47 patients showed inconspicuous MR-scans. Conclusion: Musculoskeletal infections in childhood screened varying preferences in age groups and are often associated with age-specific risk factors. Due to non-specific, clinical symptomatology of the diseases of children, the MR-imaging is of decisive meaning in order to make an accurate diagnosis and initiate such an effective treatment

Unusual presentation of multiple nerve entrapment: a case report

Cubital tunnel syndrome is the most common form of ulnar nerve entrapment and the second most common entrapment neuropathy of the upper extremity after carpal tunnel syndrome. However, bilateral compressive ulnar neuropathy is a rare condition. Electro diagnostic studies are a valid and reliable means of confirming the diagnosis

Design of a New Telescope Control System for Use in Astronomical Transient Events

Robotic autonomous telescopes provide highlevel control by selecting astronomical targets for observation, and they usually run under the control of a scheduler. TalonVIEW is a newly designed robotic autonomous telescope control system (TCS) for 16 inches telescope mount for use in astronomical transient events. The telescope control algorithm was implemented in PXI chassis written in GProgramming (LabVIEW) on realtime operating system(PharLab) from scratch. A new TCP/IP library was also implemented in Talon software to communicate with Pharlab in PXI chassis. Initial setup without any permanent pier and polar alignment showed that the pointing error of the telescope has been obtained as 2.22 arcminutes (132 arcseconds) in RA axis (horizontal axis of the image) and 25 arcseconds in Dec axis (vertical axis of the image), and tracking error has been observed as 4.8 arcseconds per second

A prospective study of serum concentrations of leptin, homocysteine and insulin resistance in children with steroid-sensitive nephrotic syndrome

Aim: To measure serum leptin, homocysteine concentrations and insulin resistance in active and remission stages of children with nephrotic syndrome (NS) and to investigate their role in NS pathogenesis. Methods: A total of 70 children were included in the study, 40 patients who had been diagnosed with NS and 30 healthy patients were control. Changes in plasma concentration of the serum homocysteine, leptin, and insulin were measured and compared with the other parameters in the groups. Results: Serum leptin concentrations in active phase were lower than the remission phase (1.48 ± 0.09 ng/dl, 1.84 ± 1.64 ng/ml, p<0.05). Also, serum homocysteine concentrations in NS group during the active phase were lower than the remission phase and the control group (6.45±2.54 ng/dl, 9.35±2.99 ng/ml, 7.76± 1.97 ng/ml, p<0.05). The serum fasting insulin concentrations and homeostatic model assessment for insulin resistance (HOMA-IR) values of remission phase were significantly higher than those of active phase (p<0.05). A positive relationship was found between the homocysteine concentrations and the body mass index of the patient; whereas, a negative relationship was detected between erythrocyte sedimentation rate (ESR), and the LDL-cholesterol concentrations (p<0.05). ESR was found as the only factor associated with lower concentrations of homocysteine during the active phase (r:-0.592, p<0.05).  Conclusion: In this study, we demonstrated that serum leptin and homocysteine concentrations decreased in active phase and increased in remission phase in children with NS.  Insulin resistance could also develop as a result of steroid use in a short period of time in these patients

MILP-aided Cryptanalysis of the FUTURE Block Cipher

FUTURE is a recently proposed, lightweight block cipher. It has an AES-like, SP-based, 10-round encryption function, where, unlike most other lightweight constructions, the diffusion layer is based on an MDS matrix. Despite its relative complexity, it has a remarkable hardware performance due to careful design decisions. In this paper, we conducted a MILP-based analysis of the cipher, where we incorporated exact probabilities rather than just the number of active S-boxes into the model. Through the MILP analysis, we were able to find differential and linear distinguishers for up to 5 rounds of FUTURE, extending the known distinguishers of the cipher by one round

Ekspresija E-selektina u mišjem sjemeniku nakon njegove pokusne torzije (ishemije/reperfuzije).

Germ cell-specific apoptosis occurs after ischemia/reperfusion of the testis and is dependent on E-selectin expression. The aim of the study was to determine differences in E-selectin expression in testes tissues of control, sham and treatment groups after ischemia/reperfusion in mice. Mice were subjected to 720° testicular torsion for 1 h or 2 h duration (ischemia) followed by detorsion (reperfusion). After 2 h of reperfusion, the testes were fixed in Bouin fixative and immunohistochemical analysis performed for E-Selectin expression. E-selectin expression increased in the ischemic testis and contralateral testis after 2 h of reperfusion in mice. This increase in E-selectin expression may confirm that E-selectins play a key role in mediating of apoptosis in germ cells after ischemia/reperfusion. Thus, the blockage of E-selectins might be a strategy for rescue of post-ischemic testes.Apoptoza germinativnih stanica javlja se nakon ishemije i reperfuzije sjemenika, a ovisna je o ekspresiji E-selektina. Cilj ovog istraživanja bio je odrediti razlike u ekspresiji E-selektina u tkivu sjemenika kontrolne, placebo i pokusne skupine nakon ishemije/reperfuzije u miševa. Miševi su bili podvrgnuti torziji sjemenika od 7200 tijekom jednog ili dva sata (ishemija), nakon čega je slijedila detorzija (reperfuzija). Nakon dva sata reperfuzije tkivo sjemenika bilo je fiksirano u Bouinovom fiksativu i pretraženo imunohistokemijski na ekspresiju E-selektina. Ekspresija E-selektina povećala se u ishemičnih sjemenika nakon dva sata reperfuzije. Može se reći da povećanje ekspresije E-selektina potvrđuje njhovu ključnu ulogu u nastanku apoptoze germinativnih stanica nakon ishemije/reperfuzije pa bi blokada E-selektina mogla biti od važnosti za spašavanje sjemenika nakon ishemije

Fournier's gangrene: etiology, treatment outcomes and factors affecting mortality in 38 patients

Aim: Fournier's gangrene (FG) is a rare, rapidly progressing and life-threatening disease of the genital, perianal and perineal regions. We aimed to evaluate etiological parameters, accompanying diseases, current treatment methods and factors affecting mortality in patients with FG. Method: The medical records of 38 patients who were operated by the same team with a diagnosis of FG from December 2015 to January 2021 were retrospectively reviewed. Those patients were divided into two groups: survivors (Group 1), and non-survivors (Group 2). Comparisons were made regarding clinical and demographic features; comorbid diseases; leukocyte count at first presentation; etiological factors; treatment outcomes; and mortality rates. Results: Thirty-eight patients (24 males, 14 females) were evaluated; mean age was 60.2 ± 13.2 years. While 76.3% (n = 29) of these patients recovered with treatment, the total mortality rate was 23.7% (n = 9). The most common cause of the FG and comorbidity were anorectal diseases (n = 22; 57.9%) and type 2 diabetes mellitus (n = 21; 55.3%), respectively. Female gender, septic shock, necrosis, abdominal wall and lumbar region involvement, chronic renal failure, FG development secondary to postoperative complications and ostomy rates were higher in non-survivors. There were no significant differences between the two groups regarding leukocyte count at first presentation, number of debridement, dressing methods, reconstruction methods, and length of hospital stay. Conclusions: Female gender, presence of septic shock and necrosis on physical examination, involvement of the abdominal wall and lumbar region in addition to the perianal region, chronic renal failure, disease secondary to postoperative complications and the necessity of ostomy play an important role in mortality