Segmentation with unsupervised learning: An application using the Walker's data

In this project, the Walkers suitable for the service were filtered by using the dataset shared by the DogGo company. Then, unsupervised machine learning methods such as K-Means, Gaussian, Principal Component Analysis were used to score and cluster the most suitable walkers according to performance, willingness, and experience. DogGo is the first mobile application in Turkey that provides pet walking and grooming services to its customers in a safe and professional manner. DogGo provides a professional service where dogs are taken care of in dog families' own homes or at the caretaker's home for any need of dog families. DogGo Company wants to provide the best matching of walkers and animals, using Machine Learning algorithms, through a 5-step acquisition process for their walkers. While the results of the K-means models created on the unique sliders were compared with the help of the Elbow method and the Silhouette score, the results of the Gaussian models were compared with the AIC and BIC method. In addition, an RFM scoring in a classical structure has also been created. When the results of the study were examined considering the Elbow and Silhouette scores, it was shown that the model created with K-Means gave the best results, and the number of clusters was decided as 2

In Between The City And The Automobility

Tez (Yüksek Lisans) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2002Thesis (M.Sc.) -- İstanbul Technical University, Institute of Science and Technology, 2002Bu çalışma, kent ve yol arasındaki ilişkiyi ve bu ilişkinin mimari bir yaklaşımla nasıl şekillenebileceğini irdelemektedir. Bu amaçla, öncelikle otomobilin şehirli insanın yaşamındaki yeri ve otomobil kullanımı ile kent yapısının nasıl değiştiği üzerinde durulmuştur. Kentlinin otomobile bağımlısı hayatı ve bu anlamda kenti daha çok otomobil ile algılama durumu, kentin desentralizasyonu ve yolda geçen zamanların kent algısındaki önemi tartışılmıştır. Bu bağlamda yol ve kent arasında kurulması gereken ilişkinin, yol ve kent arasında kimseye ait olmayan "no mans land" aracılığıyla nasıl gerçekleştirilebeceği, kent ve yol entegrasyonunun nasıl oluşturulabileceği ve bunun mekansal yansımaları örneklerle aktarılmaya çalışılmıştır.This study questions the relationship between the highway and the city and how it can be rewritten with an architectural point of view. Hence, the importance of automobile as a part of the life of the citizen and the influence of the automobile usage on the city pattern has been searched. The automobile dependent lives and perception through automobile has been considered related with the decentralisation of the city and commuting. In these circumstances, the relationship between the highway and the city, via the usage of the void in the cross-section of the two, and the spatial interpretation of a possible integration have been discussed by the help of some projects.Yüksek LisansM.Sc

Formwork System Selection in Building Construction Projects Using an Integrated Rough AHP-EDAS Approach: A Case Study

The successful completion of reinforced concrete (RC) building construction projects depends, in part, on selecting the appropriate formwork system (FWS) since it may significantly affect the project’s cost, time, and quality performance factors. The selection of the FWS depends on a number of compromising and conflicting criteria, while several FWS alternatives may be available. Therefore, the FWS selection has mostly been treated as a multi-criteria-decision-making (MCDM) problem. Although various MCDM methods have been employed to address the FWS selection problem, none have considered the subjectivity and uncertainty arising from a group decision-making process. This study aims to fill this knowledge gap by proposing an integrated approach using recently developed MCDM methods with rough numbers. In the integrated approach, first, a decision-making team is formed to develop the decision hierarchy. Then, the rough analytic hierarchy process (R-AHP) is used to determine rough criteria weights, followed by the rough evaluation based on the distance from average solution (R-EDAS) method to rank the FWS alternatives. Finally, the results are compared using different rough MCDM methods to ensure the stability of the proposed approach. The proposed approach is applied to a real-life building construction project in Turkey to select the most appropriate FWS. The integrated approach was found to be effective, and it was recommended to be used for future FWS selection problems. The proposed integrated approach in this study may be used as a decision support tool for construction professionals and experts to select the FWS in building construction projects

The way from renewable energy sources to potential feed opportunities : Distillers grains : II Distillers grains in ruminant rations

Karbon temelli yakıtların tükenme riski insanoğlunu yeni enerji kaynakları arayışına yöneltmiştir. Bu arayışlar içerisinde tahıllardan fermantasyon yolu ile üretilen etanolün biyo-benzin olarak değerlendirilmesi ilgi çekmektedir. Bu işlem esnasında yan ürün olarak elde edilen damıtık tahıllar ise içerdiği yüksek rumende sindirilmeyen protein (RUP) ve mısıra eşit enerji düzeyi ile hayvan besleme açısından yeni ve değerli bir yem potansiyeli oluşturmaktadır.The possibility of using up all carbon based fuels has been urging mankind into finding new energy sources. This search has shown that ethanol, which is produced from grains via fermentation, has attracted interest as it is assessed to be bio‐ethanol. Distillers grains, obtained during production process, has potential as a new and valuable kind of feed for animal nutrition because, it includes high amount of rumen undegradable protein (RUP) and energy level which is equal to corn

The way from renewable energy sources to potential feed opportunities: distillers grains I- obtaining distiller grains and their properties

Akaryakıt olarak kullanılacak etanol, nişasta gibi şekere dönüştürülebilen veya şeker içeren her biyolojik kaynaktan üretilebilmektedir. Bunun yanı sıra, tarımsal atıklar ve odun atıkları ile hızlı büyüyen ağaçlar ve otlar gibi selülozca zengin malzemelerden de elde edilebilmektedir. Temelde iki çeşit yöntemle etanol üretimi söz konusudur. Bunlar, yaş ve kuru öğütme yöntemleridir. Özellikle kuru öğütme yöntemi ile etanol üretimi esnasında elde edilen ürünler, hayvan beslemede yeni ve değerli bir yem potansiyeli oluşturmaktadır.Ethanol to be used as fuel can be produced from each source that can be converted into sugar or from that of biological origin containing sugar. Besides, ethanol can be produced from cellulose-rich materials such as agricultural wastes, wood wastes, fast-growing trees and herbs. Basically, two types of ethanol production are used. These are wet and dry grinding methods. Especially those products obtained during dry grinding method have potential as a new and valuable kind of feed for animal nutrition

Analysis of Formwork System Selection Criteria for Building Construction Projects: A Comparative Study

The formwork system (FWS) in reinforced concrete (RC) construction is a critical component. The appropriate FWS is selected based on a number of conflicting and compromising criteria, and the selection of the FWS is carried out by construction professionals with different technical and/or administrative backgrounds. The perspectives and perceptions of construction professionals and companies involved in the FWS selection process may vary depending on their motives. In addition, some building structural parameters may have a significant impact on the FWS selection criteria. Most of the former studies investigated the FWS selection criteria from only the perspective of contractors and neglected the potential differences in the perspectives and perceptions of different construction professionals (i.e., owners (CO), project managers (PM), construction managers (CM), site engineers (SE), planning engineers (PL), procurement engineers (PR), technical office engineers (TO), and formwork design and/or formwork sales engineers (FD/FSL)) and companies specialized in different fields (i.e., project management service (PMS), engineering and design (ENG/DSG), formwork and scaffolding (FW/SCF), and general and/or sub-contractor (GC/SC)) regarding this issue. Moreover, the impact of building structural parameters on the FWS selection criteria has not been investigated. This study aims to fill this knowledge gap through analysing the FWS selection criteria for building construction projects while comparing the perspectives and perceptions of different groups of construction professionals and companies and investigating how FWS selection criteria are affected by the building structural parameters. Based on a comprehensive literature review, 35 FWS selection criteria were identified and a questionnaire was developed. The questionnaire data obtained from 222 Turkish construction professionals were statistically analysed using mean score analysis, the Kruskal–Wallis test, and the Mann–Whitney U test. According to the study’s findings, the FD/FSL group presented significant statistical differences regarding the FWS selection criteria as compared to the CO, PM/CM/SE, and PL/PR/TO groups. Moreover, the total area of building construction and total building height significantly affected the FWS selection criteria. This study serves to underscore the perspectives of various groups of construction professionals and the critical connection between the structural parameters and FWS selection criteria. The findings of this study may guide construction professionals to select the appropriate FWS for their building construction projects

Formwork Systems Selection Criteria for Building Construction Projects: A Critical Review of the Literature

Formwork system (FWS) is one of the key components in reinforced concrete (RC) construction. Therefore, selection of the most appropriate FWS plays a critical role in the project success. Since the FWS selection is affected by several compromising and conflicting criteria, numerous studies have been carried out to identify the FWS selection criteria and/or have employed various multi-criteria decision-making (MCDM) methods since the early 1990s. However, there is no research that conducts a critical review of the previous studies addressing the FWS selection criteria in building construction projects. This study aims to fill this knowledge gap. For this purpose, a critical review of the relevant literature was carried out using an integrative approach and the findings were validated through face-to-face interviews with professionals specialized in formwork engineering. The findings of this study may provide practitioners with a useful guide that can assist them in selecting the most appropriate FWS.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author

Effect of Gum Chewing on Intestinal Functions after Gynecological Operations: A Randomized Controlled Study

OBJECTIVE: We aimed to assess the efficacy of gum chewing on intestinal functions after gynecological operations. STUDY DESIGN: A total of 86 women who underwent gynecological operation with different indications were randomly assigned to 2 groups: Group 1 was assigned to gum chewing after operation (n=52), while Group 2 was directed to routine postoperative care (n=52). Time of first bowel sound and defecation after surgery were recorded to assess the effect of gum chewing. Operation time, blood loss, type of incision, pre and postoperative serum hemoglobin levels were all evaluated. RESULTS: There was no difference between groups in terms of age, duration of operation, intraoperative blood loss, pre and postoperative serum hemoglobin levels, duration to first bowel sound, flatulence and defecation (p>0.05). Age (r=0.234, p=0.032), type of incision (r=0.228, p=0.037) were significantly correlated with the time to first bowel sound. Type of incision (r=0.295, p=0.006), duration of operation (r=0.277, p=0.01) and intraoperative blood loss (r=0.298, p=0.006) were significantly correlated with the time to first flatulence. In multivariate regression analyses, none of the variables were found to be significant parameter for time to first bowel sound (p>0.05). CONCLUSION: Gum chewing does not affect some of the gastrointestinal functions after gynecological operations and there is no single parameter for time to first bowel sound, first flatulence and first defecation, individual surgical and medical condition differences should be kept in mind while evaluating intestinal functions

Shorter the cervix, more difficult the placenta percreta operations

Background: To determine the impact of cervical length (CL) on the clinical outcome of patients undergoing peripartum hysterectomy due to placenta previa/percreta