INVESTIGATION OF DIRECTIONAL CHANGE OF VIBRATION CAUSED BY BLASTING

Açık işletmelerde yapılan basamak patlatmaları üretim faaliyetlerini kolaylaştırması ve maliyetleriolumlu etkilemesinin yanında çevresel etki açısından değerlendirildiğinde olumsuz bir takım etkileride bulunmaktadır. Bunların başında patlatmadan kaynaklanan titreşimler gelmektedir. Yapılançalışmalarda yayılma mekanizması ve karakteristiği belirlenen titreşimlerin değerlendirilmesinde vetahmin edilmesinde patlayıcı miktarı, mesafe-bileşke partikül hızı ilişkisi kullanılmaktadır. Ancaktahmin modellerinde bu ana değişkenlerin yanında arazi katsayıları olarak adlandırılan K ve βbulunmaktadır. Bu katsayılar deneysel çalışmalar ile tespit edilebilmekte ve çoğu zaman yorumsalfarklılıkları içerebilmetedir. Bu çalışmada da riskli bölge olarak tespit edilen bir Katı Atık DepolamaTesisinin işletme binalarına komşu maden işletmesinde yapılan patlatmaların çevresel etkileri tespitedilmiştir. Maden işletmesinin farklı bölgelerinde (Güney Bölgesi, Kuzey Bölgesi) yapılanpatlatmalardan farklı yönsel yayılma modelleri oluşturularak arazi katsayılarındaki fark ortayakonulmuştur. Bench blasting performed at open pit mines which have positive effect on production activitiesand production costs have also some negative environmental effects. Blast vibration is at thebeginning of these negative effects. In the previous studies, explosive quantity and distance- resultantparticle velocity relation is used for determining and evaluation of spread properties andcharacteristics of blast vibration. But also the site coefficients K and β are determined. Thesecoefficients can be determined by only experimental study and have subjective evaluation. In thisstudy, environmental effects of blasting on a Solid Waste Landfill facilities which is established at neara quarry is examined. Consequently the different site coefficients are observed at the different regionof mining area (North region, South region)

ON FRAMED TZITZEICA CURVES IN EUCLIDEAN SPACE

Investigations are very important for non-regular curves in differential geometry. Framed curves have been used recently to study singular curves, and they have many contributions to singularity theory. In this study, framed Tzitzeica curves are introduced with the help of framed curves. In addition, some framed special curves that satisfy the Tzitzeica condition are given. New results have been obtained among the framed curves of these curves

Antecedents of the concept of travel intention during the pandemic: A case study from Turkey

The purpose of this study is to reveal the effect of Covid-19 fear on travel intention and to test the mediating effect of reliance on vaccine in the relationship between fear of Covid-19 and travel intention. In this context, a structural model was created to examine these three variables: the relationship among fear of Covid-19, travel intention and trust in the vaccine. The quantitative study was carried out through a structural model in order to verify the behavior of the three variables together using IBM AMOS 24 package. A case study based on data collected from 467 public employees across Turkey supported empirically the study. At the end of the analysis, it was found that the fear of Covid-19 significantly and negatively affected the travel intention, while the fear of covid-19 significantly and negatively affected the trust in the vaccine, and no significant relationship was found between the trust in the vaccine and the travel intention. In the model in which the mediation effect was tested, it was found that trust in vaccine did not have a mediating effect on the relationship between fear of Covid-19 and travel intention. Considering these results, suggestions were made for the decision makers of travel, tourism and hospitality industry to be able to recover after the pandemic to create plan for policy and strategies