A comparison of TOPSIS, grey relational analysis and COPRAS methods for machine selection problem in the food industry of Turkey

[EN] The paper aims to compare the results of the selection/choice of cream separators by using multi-criteria decision-making methods in an integrated manner for an enterprise with a dairy processing capacity of 80 to 100 tons per day operating in the Turkish food sector. A total of 7 alternative products and 7 criteria for milk processing were determined. Criterion weights were calculated using entropy method and then integrated into TOPSIS (Technique for Order Preference by Similarity to Ideal Solutions), GRA (Grey Relational Analysis) and COPRAS (Complex Proportional Assessment) methods. Sensitivity analyses were carried out on the results obtained from the three methods to check for their reliability. At the end of the study, similar alternative and appropriate results were found from the TOPSIS and COPRAS methods. However, different alternative but appropriate or suitable results were obtained from the GRA method. Sensitivity analysis of the three methods showed that all the methods used were valid. In the review of available and related literature, very few studies on machine selection in the dairy and food sector in general were found. For this reason, it is thought that the study will contribute to the decision-making process of companies in the dairy sector in their choice of machinery selections. As far as is known, this paper is the first attempt in extant literature to compare in an integrated manner the results of TOPSIS, COPRAS and GRA methods considered in the study.Özcan, S.; Çelik, AK. (2021). A comparison of TOPSIS, grey relational analysis and COPRAS methods for machine selection problem in the food industry of Turkey. International Journal of Production Management and Engineering. 9(2):81-92. https://doi.org/10.4995/ijpme.2021.14734OJS819292Ahmed, M., Qureshi, M.N., Mallick, J., Kahla, N.B. (2019). 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Evaluation of the placenta with relative apparent diffusion coefficient and T2 signal intensity analysis

PURPOSEWe aimed to test the null hypothesis that relative apparent diffusion coefficient (rADC) and relative signal intensity values (rSIHASTE) do not change in the evaluation of placental maturation with advancing gestational age.MATERIALS AND METHODSFifty-six fetuses with diffusion-weighted magnetic resonance imaging (DW-MRI) data were enrolled in this retrospective study. Fetuses were analyzed in three different gestational age groups: group 1, 18–23 weeks; group 2, 24–28 weeks; and group 3, 29–38 weeks. The rADC (mean ADC/ADCglobe) and rSIHASTE values (mean SIHASTE/SIglobe) were obtained. Two radiologists experienced in fetal MRI who were blinded to the patient information reviewed MRI images independently. Kruskal-Wallis Test was used to compare the rADC and rSIHASTE with gestational age groups. The agreement between the two blinded readers was tested using Krippendorff’s alpha ratio.RESULTSBoth placental rADC values and placental rSIHASTE values were not significantly different between the gestational age groups (P = 0.688 and P = 0.280, respectively). rADC and rSIHASTE measurements were reproducible with a good agreement between the two readers (Krippendorff’s alpha ratio was 0.613 and 0.778, respectively).CONCLUSIONThe rADC and rSIHASTE values do not change with advancing gestational age

CNS toxicity after combined sciatic and femoral nerve block with lidocaine

Sağ ayak lateral malleolünde lezyonu nedeni ile opere olacak 48 yaşındaki kadın hastaya kombine siyatik-femoral sinir blokajı uygulandı. Bloktan 12 dakika sonra bilinç kaybı meydana geldi. Ancak vital parametrelerin stabil olması ve ilave komplikasyon görülmemesi nedeni ile operasyona izin verildi. Bloğun 95. dakikasında hasta ağrılı uyaranlara cevap vermeye başladı ve bloktan 135 dakika sonra bilinci tamamen geri döndü. Hastanın semptomları klasik santral sinir sistemi bulguları ile uyumlu olmamakla birlikte; göreceli olarak yüksek doz lidokain kullanılmış olması, aneminin varlığı, nöbet aktivitesi olarak değerlendirilen kas seğirmelerinin olması ve bu kas seğirmelerinin düşük doz midazolam ile ortadan kalkması lokal anestezik toksisitesini düşündürdü.Combined sciatic-femoral nerve block was performed in a 48-year-old woman for the removal of a right lateral malleolar lesion. The patient became unconscious at the 12th minute of the block. As vital signs were stable and no additional complication was seen, the operation was carried out and completed. The patient began to respond to painful stimulus, and was conscious and fully oriented. 95 and 135 minutes after the block respectively. Although the patient's symptoms were not consistent with classical central nervous system toxicity, relatively high dose of lidocaine used, and coexistence of anemia, occurrence of muscular twitching which could be related to seizure activity, and the treatment of this twitching with a small dose of midazolam were thought to indicate toxicit

Pseudohypoparathyroidism: A case report

Psödohipoparatiroidi parathormona end organ direnci nedeniyle gelişen hipokalsemi, hiperfosfatemi ve parathormon yüksekliği ile karakterize bir durum olup şimdiye kadar üç tipi tanımlanmıştır. Tip-Ia’da hastalarda dismorfik özellikler mevcut iken tip-1b ve tip-II’deki hastalar normal görünüme sahiptir. Kliniğimize jeneralize tonik-klonik konvulsiyon ve hipokalsemi nedeniyle refere edilen 11 yaşındaki kız hastaya psödohipoparatiroidi tip-Ib tanısı konuldu. Hastamızda psödohipoparatiroidiye ek olarak hipotiroidi de saptandı. Psödohipoparatiroidide hipotiroidi daha çok tip- Ia ve tip-1c’de görülmektedir. Tip-I ve tip-II’de beklenen bir bulgu değildir. Olgu, hem hipokalsemik konvulsiyon nedeniyle başvuran ve tedaviye cevap vermeyen hastalarda psödohipoparatiroidizmin tanı seçenekleri arasında düşünülmesi gerektiğini vurgulamak amacıyla hem de beraberinde hipotiroidi de saptandığı için ilginç bulunarak sunuldu.Pseudohypoparathyroidism is characterized by hypocalcemia, hyperphosphatemia and parathormone elevation resulting from end organ resistance against parathormone and three types of it have been defined till now. While type-Ia patients have dysmorphic characteristics, type-Ib and type-II patients have normal appearances. Here we present a 11 year-old girl who was referred to our clinic because of generalized yonic-clonic convulsion and hypocalcemia, and diagnosed as pseudohypoparathyroidism type-Ib. We also detected hypothroism in this patient. Hypothyroidism is frequent in type-Ia and type-Ic pseudohypoparathyroidism, although is very rare in type Ib and type-II pseudohypoparathyroidism. This case was reported in order to remind pseudohypoparathyroidism in patients with hypocalcemic convulsions. Additionally hypothyroidism is the interesting feature of this case

Fully endoscopic supraorbital keyhole approach to the anterior cranial base: A cadaveric study

Introduction: The supraorbital keyhole approach for anterior cranial base lesions has been increasingly used in clinical practice. Anatomical studies focusing on the endoscopic anatomy via this approach are few, although the microscopic anatomy has been well studied. The aim of this study is to describe the anatomical features and surgical exposure provided by the endoscopic supraorbital keyhole approach using quantitative measurements. Materials and Methods: Nine formalin-fixed human cadavers from the inventory of the Anatomy department were used. A total of 18 supraorbital keyhole cranitomies were conducted. The distances between the target anatomical structures and the dura mater at the craniotomy site, and the distances between deep anatomical structures were measured with purpose-designed hooks. Results: The distance between the dura mater and optic canal was measured as 69.5 ± 6.7 mm (62-83 mm); optic chiasm as 76.2 ± 5.4 mm (67-86 mm); anterior communicating artery as 82.6 ± 6.1 mm (71-93 mm); internal carotid artery (ICA) bifurcation as 74.7 ± 6.0 mm (66-84 mm) and the basilar tip as 94.9 ± 7.0 mm (87-111 mm). The mean diameter of the optic canal was 7.4 ± 1.3 mm (6-11 mm), whereas the mean diameter of diaphragma sellae was measured as 8.4 ± 1.1 mm (7-10 mm). Conclusions: The results of this study showed that the anterior anda medial aspects of the anterior cranial fossa can be visualized properly. Dissection of the ipsilateral arteries of Circle of Willis can be performed easily using an endoscopic supraorbital keyhole approach