Analyzing the drivers of customer satisfaction via social media

Social media became a great influence force during the last decade. Active social media user population increased with the new generations. Thus, data started to accumulate in tremendous amounts. Data accumulated through social media offers an opportunity to reach valuable insights and support business decisions. The aim of this project is to understand the drivers of customer satisfaction by public sentiments on Twitter towards a financial institution. Data was extracted from the most popular microblogging platform Twitter and sentiment analysis was performed. The unstructured data was classified by their sentiments with a lexicon-based model and a machine learning based model. The outcome of this study showed machine learning based model successfully overcame the language specific problems and was able to make better predictions where lexicon-based model struggled. Further analysis was performed on the extreme daily average sentiment scores to match these days with prominent events. The results showed that the public sentiment on Twitter is driven by three main themes; complaints related to services, advertisement campaigns, and influencers’ impact.Sosyal medyanın etki alanı geçtiğimiz yıllarla birlikte giderek artmıştır. Yeni jenerasyonlarla birlikte aktif olarak sosyal medya kullanan nüfus artış göstermiştir. Bu sebeple büyük veri birikimi artmıştır. Sosyal medya üzerinden oluşan büyük veri şirketlerin iş yapış şekillerine yönelik değerli kavrayış ve karar alma mekanizmalarına destek fırsatları sunmaktadır. Bu çalışmanın amacı bir finansal kurumun müşterilerinin memnuniyet seviyelerini sosyal medyada oluşan algıyı kullanarak anlamaya çalışmaktır. Çalışma kapsamında kullanılan veri popüler mikro-blog sitesi Twitter üzerinden derlenmiştir. Yapılandırılmamış bu veri sözlük tabanlı ve makine öğrenmesi tabanlı iki model kullanılarak analiz edilmiştir. Çalışma sonucu makine öğrenmesi tabanlı modelin sözlük tabanlı modelin karşılaştığı Türkçe kaynaklı sorunlardan daha az etkilendiği ve daha başarılı tahminler üretebildiğini göstermiştir. Analizin sonraki aşamasında ortalama sonucu aşırı uçlarda çıkan günler aynı günlerde ortaya çıkan olaylar ile eşleştirilmiştir. Ortaya çıkan sonuçlara göre müşteri memnuniyeti sosyal medyada ortaya çıkan üç temel faktörden etkilenmektedir. Bunlar, şikâyet yönetimi, kampanya yönetimi ve sosyal medya fenomenlerinin etkisi olarak tanımlanmaktadır

Examination of nutritional habits and knowledge levels of students educated in faculty of sports sciences

Yapılan çalışmada spor bilimleri fakültelerinde eğitim gören üniversite öğrencilerinin beslenme alışkanlıklarının incelenmesi amaçlanmıştır. Araştırmaya Burdur Mehmet Akif Ersoy Üniversitesi ile Süleyman Demirel Üniversitesi Spor Bilimleri Fakültelerinde eğitim gören 282 birey katılmıştır. Spor Bilimleri Fakültelerinde eğitim gören bireylerin beslenme durumlarını belirlemek amacıyla “Besin Tüketim Sıklık Formu” uygulanmıştır. Verilerin analizinde, kategorik değişkenlerin belirlenebilmesi için frekans ve yüzde değerler kullanılmıştır. Araştırmanın sonunda öğrencilerin beslenme alışkanlıklarının genel itibariyle cinsiyete göre yüzdelik anlamda farklılık göstermediği tespit edilmiştir. Öğrencilerin çoğunluğunun sağlığa yararlı gıdaların yanında sağlık açısından zararlı besinleri de tükettikleri belirlenmiş olup, büyük bir bölümünün sağlıklı beslenme durumlarının orta seviyede olduğu tespit edilmiştir. Elde edilen bulgulara göre, spor bilimleri fakültesi öğrencilerinin beslenme alışkanlıkları üzerinde cinsiyetin önemli bir belirleyici olmadığı ve sağlıklı beslenme alışkanlıklarının düşük olduğu söylenebilir.In this study, it was aimed to examine the nutritional habits of university students studying in sports sciences faculties. 282 individuals studying at Burdur Mehmet Akif Ersoy University and Süleyman Demirel University Sports Sciences Faculties participated in the research. "Food Consumption Frequency Form" was applied to determine the nutritional status of individuals studying in Sports Sciences Faculties. In the analysis of the data, frequency and percentage values were used to determine the categorical variables. At the end of the study, it was determined that the nutritional habits of the students generally did not differ in percentage terms according to gender. It has been determined that the majority of the students consume foods that are harmful to health as well as foods that are beneficial to health, and it has been determined that the healthy nutritional status of a large part of them is at a moderate level. According to the findings, it can be said that gender is not an important determinant on the nutritional habits of the students of the faculty of sports sciences and that healthy eating habits are low

Numerical computing approach for solving Hunter-Saxton equation arising in liquid crystal model through sinc collocation method

In this study, numerical treatment of liquid crystal model described through Hunter-Saxton equation (HSE) has been presented by sinc collocation technique through theta weighted scheme due to its enormous applications including, defects, phase diagrams, self-assembly, rheology, phase transitions, interfaces, and integrated biological applications in mesophase materials and processes. Sinc functions provide the procedure for function approximation over all types of domains containing singularities, semi-infinite or infinite domains. Sinc functions have been used to reduce HSE into an algebraic system of equations that makes the solution quite superficial. These algebraic equations have been interpreted as matrices. This projected that sinc collocation technique is considerably efficacious on computational ground for higher accuracy and convergence of numerical solutions. Stability analysis of the proposed technique has ensured the accuracy and reliability of the method, moreover, as the stability parameter satisfied the condition the proposed solution of the problem converges. The solution of the HSE is presented through graphical figures and tables for different cases that are constructed on various values of θ and collocation points. The accuracy and efficiency of the proposed technique is analyzed on the basis of absolute errors.This research has been partially supported by Ministerio de Ciencia, Innovación y Universidades grant number PGC2018-0971-B-100 and Fundación Séneca -Agencia de Ciencia y Tecnología de la Región de Murcia grant number 20783/PI/18. Also, It has been supported by the National Research Program for Universities (NRPU), Higher Education Commission, Pakistan, No. 8103/Punjab/NRPU/R and D/HEC/2017

Vertical transport of water and chemicals as affected by soil layering: a model study

Transport of water and chemicals in soils is controlled by soil properties and processes. Advection, adsorption, diffusion, and dispersion of the chemical are the main processes controlling the extent of transport of a chemical. Soil porosity and pore size distribution are the key factors controlling the water and solute flow by advection and dispersion, soil adsorption phenomena are the main factors controlling the retention of the chemical in soils. All these processes are highly variable by depth due to differences in soil characteristics of different soil horizons. This study was conducted to analyze interactions between soil layering and vertical transport of solutes and water at 2-m wide, 4-m long, and 0.5-m deep lysimeters constructed as field plots. Zero, five, ten, fifteen, and twenty cm thick sand layers (as treatments) were placed over a level alkaline surface, then 30 cm thick nonalkaline soil layers were packed over the sand layers. To represent plant effect, alfalfa was grown at each plot since it has a dense canopy. Changes in pH, EC, and in concentrations of Na, K, HCO3, and B in topsoil were monitored, measuring these variables in water extracts collected by vacuum samplers following rainfall and/or irrigation events. Water content of both repacked topsoil and alkali subsoil were measured in October, 2004 when soil was dry. At the final sampling, a representative profile was open in each research plot and morphological observations were made in these profiles. Soil pH decreased and then increased sharply irrespective to sand layer thickness, and concentrations of HCO3 and B showed a similar behavior. The EC of repacked topsoil decreased continuously probably due to the leaching of salts by application of excess amount of irrigation water, and Na concentration of soil solution increased continuously, which was attributed to sodium transported by capillary rising water from the blow alkali soil. Greater values for water content occurred at final sampling in alkali soil below 5- and 0-cm sand layers, indicating that sand layer with 10 cm thickness obscured percolation of excess water from irrigation and precipitation as observed in layered soil profiles. Roots of alfalfa concentrated in the zone of sand layers, and almost no roots of alfalfa penetrated into the alkali zone in search of water and nutrients. As morphological observations revealed, channels of decayed roots in the alkali soil served as preferential pathways of water and chemical from upper layers

A study on the effect of some production parameters on yarn properties in fancy twisting machines

Bu araştırmada, ESP-X oyuk iğli fantazi büküm makinasındaki üretim parametrelerinden fazla besleme oram ve büküm miktarının değiştirilmesi ile düz, lup, bukle, hav ve düğüm ipliği olmak üzere beş farklı fantazi iplik tipi üretilmiştir. Elde edilen her iplik tipi için deneysel ve sübjektif değerlendirme yapılarak, ipliklerin profil parametreleri, numaralan, düzgünsüzlükleri ve tüylülükleri incelenmiştir. Objektif ve sübjektif değerlendirme sonuçlan karşılaşunlıp, istatistiksel analizler yardımı ile yorumlanmıştır. Sonuç olarak, fazla besleme oram ve büküm miktarının fantazi iplik karakteristikleri üzerinde etkili olduğu, fantazi ipliklere uygulanan sübjektif değerlendirme sonuçlarının objektif değerlendirme sonuçlarım büyük ölçüde desteklediği bulunmuştur.In this research, plain, loop, boucle, slub and knop type fancy yarns were produced on hollow spindle fancy twister by chancing production parameters such as overfeed ratio and amount of twist. Profile parameters, count, evenness and hairiness of each yarn type were examined by using experimental and subjective assessment methods. The results of objective and subjective assessments were compared and discussed using statistical analyses. As a result, it was found that overfeed ratio and amount of twist had great influence on characteristics of fancy yarns and also found that the results of subjective assessment can be greatly supported by the results of objective assessment

Viral baskılanma sağlanan kronik hepatit B hastasında hepatoselüler kanser gelişimi

Suppressing viral replication is the main intervention for prevention of hepatocellular carcinoma (HCC) development, which is one of the purposes of treatment of chronic hepatitis B. We report a case of HCC in a 73-year-old woman with chronic hepatitis B who was treated and whose viral replication was successfully suppressed with antiviral therapy. The patient had anti-HBe positivity and her viral load was 1.01×106 IU/mL. Telbivudine treatment led to a decrease of HBV DNA below the detection limit on the second month of the treatment. But her α-fetoprotein level increased (121 ng/L) on the 30th month of the treatment. Magnetic resonance imaging showed a mass compatible with HCC on the liver and a biopsy revealed HCC. She was treated with chemo-embolization. Although viral suppression is achieved in patients with chronic hepatitis B, followup and HCC screening should be done regularly in patients who have HCC risk factors such as thrombocytopenia and older age, as in this case. © 2016, AVES Ibrahim Kara. All rights reserved

Kablosuz algılayıcı ağlar için yeni bir dinamik baz istasyonu konumlandırma yöntemi

Kablosuz algılayıcı ağlarda(KAA) düğümlerin nasıl ve ne şekilde haberleşeceklerinin yanı sıra baz istasyonu konumlandırması da ağın enerji verimli olması, ağ yaşam süresinin uzatılması ve bunlara bağlı olarak gönderilecek paket sayısının artırılmasında önemli bir etkiye sahiptir. Bu çalışmada, ağda yer alan düğümlerin konumu ile beraber enerjilerini de hesaba katan minimum hareketli yeni bir dinamik baz istasyonu konumlandırma algoritması önerilmiş ve bu algoritmanın başarımı hem K-means ve K-medoid gibi kümeleme algoritmaları üzerinde hem de HEED hiyerarşik protokolü üzerinde çeşitli KAA parametreleri kullanılarak ayrıntılı bir şekilde incelenmiştir. OMNeT++ ile simülasyonu yapılan çalışmanın sonucunda, dinamik baz istasyonu kullanımı sayesinde, sabit baz istasyonu konumlandırmasına göre ağ yaşam süresinde maksimumda %119.2’ye baz istasyonuna ulaşan paket sayısında ise maksimumda %262.6’ya varan performans iyileştirmeleri sağlanmıştır

A simple neuro-Heuristic computational intelligence algorithm for thin film flow equation arising in physical models

16th IEEE International Conference on Machine Learning and Applications (ICMLA) -- DEC 18-21, 2017 -- Cancun, MEXICOWOS: 000425853000085In this study, computational method are used for finding the approximation in the solution of thin film flow problem using stochastic solver like genetic algorithm (GA) and pattern search (PS). the mathematical model is formulated by defining a fitness function and the process is working in artificial neural networks (ANNs). Proposed numerical results are optimized several times for various values of stoke numbers and material parameters. Different parameters are chosen and several independent number of runs are carried out to find the reliability and accuracy of results. A statistical analysis is presented for the reliability of designed scheme.IEE

Relationship between Duke Treadmill Score and platelet volume indices in predicting coronary artery disease

Purpose — Platelet volume indices are associated with poor cardiovascular outcomes. The Duke Treadmill Score (DTS) is a composite index that is based on the results from the exercise test. The purpose of this study was to investigate the relationship between the DTS and platelet volume indices in patients with suspected coronary artery disease (CAD). Methods — A total of 1205 participants were enrolled in the study. Complete blood counts were obtained. All participants underwent an exercise test. The DTS were calculated after exercise. Demographic, clinical and echocardiographic characteristics of the patients were recorded. Results — Platelet distribution width (PDW) and especially mean platelet volume (MPV) values increase with higher DTS risk group irrespective of CAD and risk groups which is also found to be statistically significant (P<0.001). The power of the relation was powerful (r=0.911). A powerful positive relation was found between risk level and PDW (P<0.001, r=0.319). Paralleled with DTS, MPV and PDW values of the patients with CAD, hypertension, diabetes mellitus, smoking and hyperlipidemia were higher compared to those without, while MPV and PDW values were lower for the patients taking beta-blockers, angiotensin-converting-enzyme inhibitors or angiotensin receptor blockers, diuretics, aspirin and statins. When MPV (f1) and PDW (%) values were compared between groups, there was a high statistical significance between most groups. Conclusion — We found an independent association between MPV, PDW and DTS