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        • KCI등재SCOPUS
        • KCI등재SCOPUS

          COLLISION AVOIDANCE OF LOW SPEED AUTONOMOUS SHUTTLES WITH PEDESTRIANS

          Sukru,Yaren,Gelbal,Bilin,Aksun-Guvenc,Levent,Guvenc 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.4

          This paper is on a pedestrian collision avoidance system for low speed autonomous shuttles based on Vehicle-to-Pedestrian (V2P) communication. When pedestrians cannot be detected using line-of-sight sensors like camera, radar and LIDAR, V2P communication with the Dedicated Short Range Communication (DSRC) enabled pedestrian smartphone is used to detect and localize them through the in-vehicle DSRC radio used for Vehicle-to-Everything (V2X) communication. The vehicle, then, either stops or, if possible, goes around the pedestrian in a socially acceptable manner using the elastic band method for locally modifying the vehicle trajectory in real time. The elastic band method of collision avoidance is modified for fast real time execution in this paper. Along with model-in-the-loop simulations, a hardware-in-the-loop simulator using an automated driving vehicle model in the high fidelity vehicle dynamics simulation program Carsim Real Time with Sensors and Traffic with two DSRC modems emulating the vehicle and pedestrian communications is introduced and used in this paper as a prerequisite to real world experiments. Both stationary and moving pedestrians are considered in the model and hardware-in-the-loop simulations. Two real world experiments are also presented to demonstrate the V2P based avoidance of crashes between low speed autonomous shuttles and pedestrians.

        • SCIESCOPUSKCI등재

          The Effects of Grape Seed Flour on the Quality of Turkish Dry Fermented Sausage (Sucuk) during Ripening and Refrigerated Storage

          Sukru,Kurt 한국축산식품학회 2016 한국축산식품학회지 Vol.36 No.3

          '스콜라' 이용 시 소속기관이 구독 중이 아닌 경우, 오후 4시부터 익일 오전 7시까지 원문보기가 가능합니다.

          In this study, the effects of grape seed flour on the physical-chemical properties, microbiological and sensory properties of Turkish dry fermented sausage, sucuk, was investigated. After the sausages produced with beef, beef fat, sheep tail fat and spices, they were ripened for 14 d. Then they were vacuum-packaged and stored for 80 d at 4ºC. The effects of grape seed flour (GSF; 0%, 0.75%, 1.5%, 3%) on the physical-chemical properties (pH, moisture, fat, protein, free fatty acids, thiobarbituric acids, diameter reduction, ripening yield, instrumental colour), microbiological properties (total aerobic mesophilic and lactic acid bacteria, Enterobacteriaceae, mould and yeast) and sensory properties of the sausages were investigated. Grape seed flour decreased moisture, TBA, diameter reduction, instrumental colour (a, b) values and sensory analysis scores during the ripening period; it also decreased TBA, instrumental colour (L, a, b) values, total aerobic mesophilic and lactic acid bacteria counts during the storage period. It was concluded that grape seed flour has a potential application as an additive in dry fermented sausages.

        • KCI등재SCOPUS

          Frictionless contact problem for a layer on an elastic half plane loaded by means of two dissimilar rigid punches

          Talat,Sukru,Ozsahin 국제구조공학회 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.25 No.4

          The contact problem for an elastic layer resting on an elastic half plane is considered according to the theory of elasticity with integral transformation technique. External loads P and Q are transmitted to the layer by means of two dissimilar rigid flat punches. Widths of punches are different and the thickness of the layer is h. All surfaces are frictionless and it is assumed that the layer is subjected to uniform vertical body force due to effect of gravity. The contact along the interface between elastic layer and half plane will be continuous, if the value of load factor, λ, is less than a critical value, λcr. However, if tensile tractions are not allowed on the interface, for λ > λcr the layer separates from the interface along a certain finite region. First the continuous contact problem is reduced to singular integral equations and solved numerically using appropriate Gauss-Chebyshev integration formulas. Initial separation loads, λcr , initial separation points, xcr, are determined. Also the required distance between the punches to avoid any separation between the punches and the layer is studied and the limit distance between punches that ends interaction of punches, is investigated. Then discontinuous contact problem is formulated in terms of singular integral equations. The numerical results for initial and end points of the separation region, displacements of the region and the contact stress distribution along the interface between elastic layer and half plane is determined for various dimensionless quantities.

        • SCIESCOPUSKCI등재

          The Effects of Grape Seed Flour on the Quality of Turkish Dry Fermented Sausage (Sucuk) during Ripening and Refrigerated Storage

          Kurt,,Sukru Korean Society for Food Science of Animal Resource 2016 한국축산식품학회지 Vol.36 No.3

          In this study, the effects of grape seed flour on the physical-chemical properties, microbiological and sensory properties of Turkish dry fermented sausage, sucuk, was investigated. After the sausages produced with beef, beef fat, sheep tail fat and spices, they were ripened for 14 d. Then they were vacuum-packaged and stored for 80 d at 4℃. The effects of grape seed flour (GSF; 0%, 0.75%, 1.5%, 3%) on the physical-chemical properties (pH, moisture, fat, protein, free fatty acids, thiobarbituric acids, diameter reduction, ripening yield, instrumental colour), microbiological properties (total aerobic mesophilic and lactic acid bacteria, Enterobacteriaceae, mould and yeast) and sensory properties of the sausages were investigated. Grape seed flour decreased moisture, TBA, diameter reduction, instrumental colour (a, b) values and sensory analysis scores during the ripening period; it also decreased TBA, instrumental colour (L, a, b) values, total aerobic mesophilic and lactic acid bacteria counts during the storage period. It was concluded that grape seed flour has a potential application as an additive in dry fermented sausages.

        • KCI등재SCIE

          Spinal Hydatid Cyst Disease : Challenging Surgery - an Institutional Experience

          Yusuf,Sukru,Caglar,Onur,Ozgural,Murat,Zaimoglu,Cemil,Kilinc,Umit,Eroglu,Ihsan,Dogan,Gokmen,Kahilogullari 대한신경외과학회 2019 Journal of Korean neurosurgical society Vol.62 No.2

          Objective : Hydatid cyst disease is caused by the parasite Echinococcus granulosus. It is rarely seen in the vertebral system, occurring at a rate of 0.2–1%. The aim of this study is to present 12 spinal hydatid cyst cases, and propose a new type of drainage of the cyst. Methods : Twelve cases of spinal hydatid cysts, surgical operations, multiple operations, chronic recurrences, and spinal hydatic cyst excision methods are discussed in the context of the literature. Patients are operated between 2005 and 2016. All the patients are kept under routine follow up. Patient demographic data and clinicopathologic characteristics are examined. Results : Six male and six female patients with a median age of 38.6 at the time of surgery were included in the study. Spinal cyst hydatid infection sites were one odontoid, one cervical, five thoracic, two lumbar, and three sacral. In all cases, surgery was performed, with the aim of total excision of the cyst, decompression of the spinal cord, and if necessary, stabilization of the spinal column. Mean follow up was 61.3 months (10–156). All the patients were prescribed Albendazole. Three patients had secondary hydatid cyst infection (one lung and two hepatic). Conclusion : The two-way drainage catheter placed inside a cyst provides post-operative chlorhexidine washing inside the cavity. Although a spinal hydatid cyst is a benign pathology and seen rarely, it is extremely difficult to achieve a real cure for patients with this disease. Treatment modalities should be aggressive and include total excision of cyst without rupture, decompression of spinal cord, flushing of the area with scolicidal drugs, and ensuring spinal stabilization. After the operation the patients should be kept under routine follow up. Radiological and clinical examinations are useful in spotting a recurrence.

        • KCI등재SCOPUS

          Use of UVP to Investigate the Evolution of Bed Configuration

          M.,Sukru,Guney,Gokcen,Bombar,Aysegul,O.,Aksoy,Mustafa,Dogan 대한토목학회 2013 KSCE JOURNAL OF CIVIL ENGINEERING Vol.17 No.5

          Ultrasonic Velocity Profiler (UVP) is a widely used instrument which allows the determination of the complete velocity profile. UVP can also measure the echo amplitude in the mean time. In this study, it is intended to use the UVP transducers in an indirect way to detect the bottom surface by orienting them vertically downward. Preliminary experiments were conducted with immobile bed by using uniform, non-uniform sediment as well as wooden and plastic surface. It was appeared that the first remarkable peak corresponds to the bottom surface. The time variations of local bed elevations were registered by applying this technique in order to determine the erosion and deposition around a bridge pier and local scour around a horizontal submerged pipe. It was revealed that the so registered scour depths were in good agreement with those observed during the experiments. Consequently, it is demonstrated that time varied bed elevations can be measured via the first peak value of echo amplitudes by placing UVP transducers vertically.

        • SCIESCOPUSKCI등재

          Effect of Ripening Period, Nitrite Level and Heat Treatment on the Chemical Characteristics of Turkish Dry Fermented Sausage (Sucuk)

          Kurt,,Sukru,Zorba,,Omer Asian Australasian Association of Animal Productio 2010 Animal Bioscience Vol.23 No.8

          In order to determine the potential for reduction of nitrite levels and ripening period with heat treatment, the effects of ripening period (1-13 days), nitrite level (45-195 ppm), and heat treatment (30-$90^{\circ}C$) on lipolysis, peroxide, TBA, proteolysis, and residual nitrite values of sucuk were investigated using response surface methodology. The ripening period significantly (p<0.01) increased lipolysis, peroxide, TBA, and proteolysis values and decreased residual nitrite values. The effects of additional nitrite levels were found to significantly affect peroxide and residual nitrite values. Significant amounts of the additional nitrite levels were reduced during processing and on the first day of ripening periods.

        • KCI등재

          Xanthan Gum Production from Hydrolyzed Rice Bran as a Carbon Source by Xanthomonas spp

          ( Demirci Ahmet Sukru ), ( Muhammet Arici ), ( Tuncay Gumusc ) 한국미생물생명공학회(구 한국산업미생물학회) 2012 한국미생물·생명공학회지 Vol.40 No.4

          The aim of this study was to utilize rice bran, the main waste product of paddy processing, in xanthan gum production by Xanthomonas campestris fermentation. Deffated rice bran was enzymatically hydrolyzed using cellulase, gluco-amylase, alpha-amylase and xylanase at various pHs and temperatures within 0-12 h. The highest sugar content reached at 35oC, pH 5.5 in 6 h with 41.66%. The enzymatic hydrolysate was used as the carbon source for xanthan gum production by X. campestris NRRL B-1459 and X. campestris pv. campestris. The highest productivities obtained were 21.87 and 17.10 g/L, respectively. Viscosity measurement for the obtained xanthan gums and commercial gum was carried out in gum solutions at various pHs and temperatures. The highest viscosity was reached with 1% gum solutions at 20oC and pH 5.5 for all gums with viscosity values of 470, 131 and 138 mPa sec, respectively. This work has provided relevant scientific information about the use of rice bran, an abundant agroindustrial residue, to produce xanthan gum.

        • SCOPUSSCIEKCI등재

          Spinal Hydatid Cyst Disease : Challenging Surgery - an Institutional Experience

          Caglar,,Yusuf,Sukru,Ozgural,,Onur,Zaimoglu,,Murat,Kilinc,,Cemil,Eroglu,,Umit,Dogan,,Ihsan,Kahilogullari,,Gokmen The Korean Neurosurgical Society 2019 Journal of Korean neurosurgical society Vol.62 No.2

          Objective : Hydatid cyst disease is caused by the parasite Echinococcus granulosus. It is rarely seen in the vertebral system, occurring at a rate of 0.2-1%. The aim of this study is to present 12 spinal hydatid cyst cases, and propose a new type of drainage of the cyst. Methods : Twelve cases of spinal hydatid cysts, surgical operations, multiple operations, chronic recurrences, and spinal hydatic cyst excision methods are discussed in the context of the literature. Patients are operated between 2005 and 2016. All the patients are kept under routine follow up. Patient demographic data and clinicopathologic characteristics are examined. Results : Six male and six female patients with a median age of 38.6 at the time of surgery were included in the study. Spinal cyst hydatid infection sites were one odontoid, one cervical, five thoracic, two lumbar, and three sacral. In all cases, surgery was performed, with the aim of total excision of the cyst, decompression of the spinal cord, and if necessary, stabilization of the spinal column. Mean follow up was 61.3 months (10-156). All the patients were prescribed Albendazole. Three patients had secondary hydatid cyst infection (one lung and two hepatic). Conclusion : The two-way drainage catheter placed inside a cyst provides post-operative chlorhexidine washing inside the cavity. Although a spinal hydatid cyst is a benign pathology and seen rarely, it is extremely difficult to achieve a real cure for patients with this disease. Treatment modalities should be aggressive and include total excision of cyst without rupture, decompression of spinal cord, flushing of the area with scolicidal drugs, and ensuring spinal stabilization. After the operation the patients should be kept under routine follow up. Radiological and clinical examinations are useful in spotting a recurrence.

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