Artificial Intelligence Applications for Friction Stir Welding: A Review

Berkay Eren,Mehmet Ali Guvenc,Selcuk Mistikoglu 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.2

Advances in artificial intelligence (AI) techniques that can be used for different purposes have enabled it to be used in manydifferent industrial applications. These are mainly used for modeling, identification, optimization, prediction and control ofcomplex systems under the influence of more than one parameter in industrial applications. With the increasing accuracy ofAI techniques, it has also obtained a wide application area on friction stir welding (FSW), one of the production methodsdeveloped in recent years. In this study, commonly used AI techniques for FSW, results, accuracy and superiority of AItechniques are reviewed and evaluated. In addition, an overview of AI techniques for FSW in different material combinationsis provided. Considering the articles examined; It is seen that welding speed, rotational speed, the plunge depth, spindletorque, shoulder design, base material, pin design/profile, tool type are used as input parameters and tensile strength, yieldstrength, elongation, hardness, wear rate, welding quality, residual stress, fatigue strength are used as output parameters. Ascan be seen from the studies, it made important contributions in deciding what input parameters should be in order to havethe output parameter at the desired value. The most common used materials for FSW are Al, Ti, Mg, Brass, Cu and so on. When FSW studies using artificial intelligence techniques were examined, it was seen that 81% of the most used materialswere AL alloys and 23% of them were made with dissimilar materials. The most commonly utilized AI techniques weresaid to be artificial neural networks (ANN), fuzzy logic, machine learning, meta-heuristic methods and hybrid systems. Asa result of the examination, ANN was the most widely used method among these methods. However, in recent years, withthe exploration of new hybrid methods it was seen that hybrid systems used with ANN have higher accuracy.

Sciatic neurotmesis and periostitis ossificans progressiva due to a traumatic/unexpected glass injury: a case report

( Berkay Yalçınkaya ),( Hasan Ocak ),( Ahmet Furkan Çolak ),( Levent Özçakar ) 영남대학교 의과대학 2024 Yeungnam University Journal of Medicine Vol.41 No.1

Peripheral nerves may be affected or injured for several reasons. Peripheral nerve damage can result from trauma, surgery, anatomical abnormalities, entrapment, systemic diseases, or iatrogenic injuries. Trauma and iatrogenic injuries are the most common causes. The ulnar, median, and radial nerves are the most injured nerves in the upper extremities, while the sciatic and peroneal nerves are the most injured nerves in the lower extremities. The clinical symptoms of peripheral nerve damage include pain, weakness, numbness/ tingling, and paresthesia. Therefore, early diagnosis and appropriate treatment of peripheral nerve injuries are crucial. If a peripheral nerve injury is left untreated, it can lead to severe complications and significant morbidity. The sciatic nerve is one of the most affected nerves. This nerve is generally injured by trauma and iatrogenic causes. Children are more susceptible to trauma than adults. Therefore, sciatic nerve injuries are observed in pediatric patients. When the sciatic nerve is damaged, pain, weakness, sensory loss, and gait disturbances can occur. Therefore, the diagnosis and treatment of sciatic nerve injuries are important to avoid unexpected consequences. Ultrasound can play an important role in the diagnosis of peripheral nerve injury and the follow-up of patients. The aim of this case report is twofold. First, we aimed to emphasize the critical role of ultrasonographic evaluation in the diagnosis of peripheral nerve injuries and pathologies. Second, we aimed to present this case, which has distinguishing features, such as the existence of periostitis ossificans progressiva with sciatic neurotmesis due to a traumatic glass injury.

Optimal examination for traumatic nerve/muscle injuries in earthquake survivors: a retrospective observational study

( Berkay Yalçınkaya ),( Büşranur Tüten Sağ ),( Mahmud Fazıl Aksakal ),( Pelin Analay ),( Hasan Ocak ),( Murat Kara ),( Bayram Kaymak ),( Levent Özçakar ) 영남대학교 의과대학 2024 Yeungnam University Journal of Medicine Vol.41 No.2

Background: Physiatrists are facing with survivors from disasters in both the acute and chronic phases of muscle and nerve injuries. Similar to many other clinical conditions, neuromusculoskeletal ultrasound can play a key role in the management of such cases (with various muscle/nerve injuries) as well. Accordingly, in this article, a recent single-center experience after the Turkey-Syria earthquake will be rendered. Methods: Ultrasound examinations were performed for various nerve/muscle lesions in 52 earthquake victims referred from different cities. Demographic features, type of injuries, and applied treatment procedures as well as detailed ultrasonographic findings are illustrated. Results: Of the 52 patients, 19 had incomplete peripheral nerve lesions of the brachial plexus (n=4), lumbosacral plexus (n=1), and upper and lower limbs (n=14). Conclusion: The ultrasonographic approach during disaster relief is paramount as regards subacute and chronic phases of rehabilitation. Considering technological advances (e.g., portable machines), the use of on-site ultrasound examination in the (very) early phases of disaster response also needs to be on the agenda of medical personnel.

태양에너지 기반 부표형 막증류 공정의 주요 운전 인자 연구

( Berkay Umut Yesildagli ),정성필 ( Jeong Seongpil ) 한국물환경학회 2020 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2020 No.-

Due to climate change, water scarcity becomes a major issue which threatening human safety globally. Developing countries is facing a limitation of a safe drinking water because contaminated groundwater or seawater could be the only available water sources. In Mekong delta, Vietnam also experiencing severe water shortage for argiculture and drinking water purposes during the dry season due to seawater arise and limitaion of rainfall. Therefore, it is required to produce drinking water from the salty riverwater or groundwater. As a candidate for sustainable water producing flatform, floating type membrane distillation system was suggested. Membrane distillation process operated by the temperature difference across the membrane. During the dry season, solar irradiation is enough to be collected on the floating type membrane distillaton module. By using the collected solar energy, only pure water could be vaporized from the feed side of the module, transferred across the membrane and condenced in the permeate side of the module. In order to identify the key operational parameters on solar-powered floating type membrane distillation system, the module was tested in the AGMD and PGMD configurations. The temperature profile in the module and solar irradiations of the tested days were used to assess the relationship to the fluxes of the modules under given experimental conditions. Statistical analysis was also conducted by using the operational parameters of the MD system.

Comparison of the effects of articaine and bupivacaine in impacted mandibular third molar tooth surgery: a randomized, controlled trial

Tokuc, Berkay,Coskunses, Fatih Mehmet The Korean Dental Society of Anesthsiology 2021 Journal of Dental Anesthesia and Pain Medicine Vol.21 No.6

Background: The aim of this randomized, triple-blind trial was to determine the anesthetic, analgesic, and hemodynamic effects of articaine and bupivacaine in the extraction of impacted mandibular third molar teeth. Methods: Twenty-six patients who underwent removal of bilaterally symmetric mandibular third molars were randomly assigned to articaine and bupivacaine groups in a split-mouth design. The onset of anesthetic action, intraoperative comfort, total amount of solution used, duration of postoperative anesthesia and analgesia, rescue analgesic use, postoperative pain, intraoperative bleeding, and hemodynamic parameters were evaluated. Results: In the articaine group, the onset of anesthetic activity was faster, intraoperative comfort was greater, and effective anesthesia required less local anesthetic solution. The bupivacaine group showed a significantly longer duration of postoperative anesthesia and analgesia, in addition to lower visual analog scale values at 6 and 48 hours postoperatively. There were no significant differences between the two solutions regarding rescue analgesic medication use, intraoperative bleeding, or hemodynamics. Conclusion: Articaine showed greater clinical efficacy than bupivacaine in intraoperative anesthesia, achieving faster onset of anesthetic action and greater patient comfort while also requiring less reinforcement during surgery. However, bupivacaine was superior in terms of postoperative anesthesia, reducing postoperative pain due to its residual anesthetic and analgesic effects. Both anesthetic solutions led to similar hemodynamics at low doses in mandibular third molar surgery

Determination of dosimetric dependence for effective atomic number of LDR brachytherapy seed capsule by Monte Carlo simulation

Camgöz Berkay,Tarım Dilara 한국원자력학회 2023 Nuclear Engineering and Technology Vol.55 No.8

Brachytherapy is a special case of radiotherapy. It should be arranged according to some principles in medical radiation applications and radiation physics. The primary principle is to use as low as reasonably achievable dose in all ionizing radiation applications for diagnostic and therapeutic treatments. Dosimetric distributions are dependent on radioactive source properties and radiation-matter interactions in an absorber medium such as phantom or tissue. In this consideration, the geometrical structure and material of the seed capsule, which surrounds a radioactive material, are directly responsible for isodose profiles and dosimetric functions. In this study, the radiometric properties of capsule material were investigated on dose distribution in a water phantom by changing its nuclear properties using the EGSnrc Monte Carlo (MC) simulation code. Effective atomic numbers of hypothetic mixtures were calculated by using different elements with several fractions for capsule material. Model 6711 brachytherapy seed was modeled by EGSnrc/Dosrcnrc Code and dosimetric functions were calculated. As a result, dosimetric parameters of hypothetic sources have been acquired in large-scale atomic number. Dosimetric deviations between the data of hypothetic seeds and the original one were analyzed. Unit dose (Gy/Particle) distributions belonging to different types of material in seed capsule have remarkably differed from the original capsule's data. Capsule type is major variable to manage the expected dose profile and isodose distribution around a seed. This study shows us systematically varied scale of material type (cross section or effective atomic number dependent) offers selective material usage in production of seed capsules for the expected isodose profile of a specific source

Evaluation of biopsies of oral and maxillofacial lesions: a retrospective study

Hatice Hosgor,Berkay Tokuc,Bahadır Kan,Fatih Mehmet Coskunses 대한구강악안면외과학회 2019 대한구강악안면외과학회지 Vol.45 No.6

Objectives: This study aimed to determine the prevalence of odontogenic cysts, tumors, and other lesions among reports in the archives of the Department of Oral and Maxillofacial Surgery at the Faculty of Dentistry affiliated with Kocaeli University collected over a four-year period. Materials and Methods: In this retrospective study, patient records from the archive of the Department of Oral and Maxillofacial Surgery from 2014 to 2018 were reviewed. Patient demographic information (age and sex) and lesion location were recorded and analyzed. Results: From a total of 475 files reviewed, odontogenic cyst was confirmed in 340 cases (71.6%), and odontogenic tumor was confirmed in 52 cases (10.9%). Regarding odontogenic cyst type, the most common was radicular cyst (216 cases), followed by dentigerous cyst (77 cases) and odontogenic keratocyst (23 cases). Among odontogenic tumors, the most frequent was odontoma (19 cases), followed by ossifying fibroma (18 cases) and ameloblastoma (9 cases). Giant cell granuloma was also reported in 35 cases. Conclusion: The distribution pattern of odontogenic cysts and tumors in our retrospective study is relatively similar to that reported in the literature. Complete clinical reports for final diagnosis of these lesions and routine follow-up examinations are very important for treatment.

The consumption of tea and coffee in Turkey and emerging new trends

Yildirim Oya,Karaca Oya Berkay 한국식품연구원 2022 Journal of Ethnic Foods Vol.9 No.-

The aim of this study is to determine the tea and coffee consumption habits of individuals in Adana and İzmir and to identify how the new trends are effective in consumption patterns. Therefore, the research is based on a comparison of two cities with distinctive culinary culture. Questionnaire technique was used to collect the data. Surveys were administered to 806 people in Adana and İzmir, Turkey. The research shows that tea is preferred in Adana (63.3%), whereas participants in İzmir opt for coffee (53.4%). The ratio of tasting international regional coffees is higher in İzmir than in Adana. In both cities, black tea and Turkish coffee are among the most consumed drinks. Despite the increasing tendency of foreign beverages due to the impact of globalization, the local people kept their interest in tea and Turkish coffee drink which is a component of the national intangible cultural heritage of Turkey. It is recommended that foreign businesses should include these traditional drinks on the menu.

Investigation of the Performance of a V-shaped Inner Plate Array Armor System Against 7.62 mm Caliber Bullets

Erdal Camcı,Mehmet Calıskan,İlyas Berkay Tural,Ozgecan Ergu,Fehim Findik 한국정밀공학회 2024 International Journal of Precision Engineering and Vol.25 No.2

In this study, the impact resistance performance of the steel internal structure, which is fixed with screws between the front and rear plate, has a 90° bent form and is placed to deflect the penetrating bullet, was measured. This article presents the ballistic performance of the designed armor system against 7.62 mm armor-piercing projectiles with a velocity of 630 to 870 ± 10 m/s, coming at an angle of 90° to the front plate. The study was carried out both experimentally and numerically. Experimental results showed that remarkable ballistic results were obtained among the investigated materials examined in 32 mm thick aluminum-steel-aluminum sheet structures. Numerical and experimental results were compared and a significant correlation was found. In addition to the ballistic performance results, the samples were examined for fracture mechanisms by scanning electron microscopy and EDS analysis.

Correlation between preoperative pressure pain assessments and anxiety and postoperative pain in impacted lower third molar surgery

Hatice Hosgor,Fatih Mehmet Coskunses,Berkay Tokuc 대한구강악안면외과학회 2021 대한구강악안면외과학회지 Vol.47 No.1

Objectives: The aim of this study was to evaluate correlations between anxiety and preoperative pressure pain assessments and postoperative pain and analgesic requirements in impacted lower third molar tooth surgery. Materials and Methods: This prospective study enrolled 60 patients who underwent impacted lower third molar surgery. The preoperative State- Trait Anxiety Inventory-I (STAI-I), pressure pain threshold, and pressure pain tolerance scores were measured. At 2, 4, 6, 12, and 24 hours, and at 6 days following surgery, the patients scored their pain on the visual analogue scale and recorded their analgesic drug usage. The data were evaluated, and the results were statistically analyzed. Results: Of the 60 patients, 38 were female. Mean age was 24.62±7.42 years. The study found no relationship between preoperative pressure pain assessments and postoperative pain (P>0.05). There was also no relationship observed between preoperative STAI-I scores and postoperative pain (P>0.05). However, there was a positive correlation between operation time and total medication taken (P<0.05). Conclusion: Preoperative pressure pain threshold, pressure pain tolerance, and anxiety level had no significant effects on postoperative pain and analgesic requirements in impacted lower third molar surgery.