Spatial Variability of Mechanical Properties of Sedimentary Rocks in the Jiu Valley Basin: A Stress-strain Curve Analysis | Chapter 6 | Research Advances in Environment, Geography and Earth Science Vol. 10

The study aimed to evaluate the geomechanical characteristics of sedimentary rocks in the Jiu Valley coal basin, with the purpose of providing relevant data for the design and execution of mining works under safe conditions. A significant number of rock samples were analyzed, representative of the various lithological types and zones of the basin. Laboratory tests were conducted to determine the mechanical behavior of rocks under load, with a focus on strength, deformability, and failure mode. The results obtained highlighted a significant heterogeneity of geomechanical properties, influenced by factors such as mineralogical composition, geological structure, and degree of alteration. The study identified that the sedimentary rocks in Jiu Valley can be classified according to strength into three main categories: very low-strength rocks, low-strength rocks, and medium-strength rocks. A close correlation was also observed between the mechanical behavior of rocks and the presence of structural defects, such as fissures and fractures. A detailed analysis of stress-strain curves allowed the identification of two main types of behavior: elastic, with work hardening, and inelastic, characteristic of low-strength rocks. These differences in behavior have important implications for the stability of mining works, influencing the mode of crack propagation and deformations induced by mining. In conclusion, the study highlighted the geomechanical complexity of sedimentary rocks in the Jiu Valley basin. The obtained data can be used to develop more accurate numerical models and to optimize the design of mining works, thus contributing to increasing the safety and efficiency of mining operations in this area. Through extensive laboratory and field investigations, coupled with analytical studies, we have obtained objective data on the geomechanical laws governing the rock mass. These findings allow for a quantitative and qualitative description of its deformation behavior, aiding in the understanding of stress conditions and facilitating the development of new methods to ensure the stability of mining operations. These studies focused on determining the characteristics of strength and deformation necessary to classify these rocks and facilitate the study of their rheological behavior.

 

Author (s) Details

Mihaela Toderas
Mining Engineering, Surveying and Civil Engineering Department, Faculty of Mines, University of Petrosani, 332006 Petrosani, Romania.

 

Please see the book here:- https://doi.org/10.9734/bpi/raeges/v10/2783

Importance of Practical Business Strategies for Independent Quick Service Restaurants to Sustain Beyond Five Years | Chapter 7 | An Overview on Business, Management and Economics Research Vol. 8

 Aims: To explore strategies that independent quick-service restaurant owners use to sustain business beyond the first 5 years.

 

Study Design: Qualitative multiple case study design was used in this study.

 

Place and Duration of Study: Data were collected from semi- structured interviews with 6 owners of independent quick-service restaurants in Little Rock, Arkansas, who sustained their business beyond the first 5 years and from the review of business documents concerning sustainability. The study was conducted between January 2019 to May 2019.

 

Methodology: A qualitative re-search design was used to explore the narrative experiences, and contemporary experiences and the culture of independent quick-service restaurant owners. Second, re-searchers conducted semi-structured interviews to collect data from the independent quick-service restaurant owners Finally, a thematic analysis was conducted to organize data from the interviews and make a conclusion from the collected data regarding.

 

Results: The findings of the study identified 6 emerging themes: organization value, customer required excellence, financial perspective, human assets, physical operating materials, and technological prowess. These 6 emerging themes contributed significantly to the success of the business practice by 1) providing a guide for operating an independent quick-service restaurant with limited resources, 2), determining whether internal resources are heterogeneous and immobile, 3) evaluating internal re-sources to determine their competitive advantage, and 4) leverage internal re-sources to achieve optimal outcomes.

 

Conclusion: The implications for positive social change include the potential to support the welfare of the citizens in Little Rock, Arkansas, and owners of quick-service restaurants across the United States by providing them with the strategies necessary to increase their survival rate, improve job sustainability, and encourage job creation. The successful owners of independent quick-service restaurants knew how to respond to challenges; they knew how to leverage their limited internal resources using informal strategies to create sustained competitive advantage.

Author(s) Details:

Mario D. Wallace,
Walden University, Minneapolis, USA.

Please see the link here: https://stm.bookpi.org/AOBMER-V8/article/view/13280

Key Markers and Epigenetic Modifications of Dental-derived Mesenchymal Stromal Cells: A Review | Chapter 8 | Emerging Trends in Disease and Health Research Vol.4.

 The oral cavity has a diverse population of mesenchymal stromal cells (MSCs). Dental-derived MSCs-based approaches have shown significant potential among regeneration therapies. Dental-derived MSCs have been used in several preclinical investigations and clinical trials for the treatment of dental and non-dental diseases including as neurodegenerative diseases, autoimmune diseases, and orthopaedic problems. Dental-derived MSCs, on the other hand, vary in their origin tissues, individual donors, clonal subpopulations, and single cells. Variation in regeneration potential across cells in dental-derived MSCs cultures could skew trial outcomes and stymie or halt the adoption of dental-derived MSCs therapy in clinical practise. Although variation is unavoidable, our limited ability to detect and manage heterogeneity makes manufacturing dental-derived MSCs therapies difficult. We initially explored the heterogeneity of dental-derived MSCs before moving on to the important markers and epigenetic alterations associated with dental-derived MSC proliferation, differentiation, immunomodulation, and ageing. These messages aid in the regulation of the composition and function of dental-derived MSCs, allowing cell therapy to be more quickly implemented in clinical practise.

Author(s) Details:

Jingqiu Chen,
Yunnan Provincial Key Laboratory of Stomatology, The Affiliated Stomatology Hospital of Kunming Medical University, Kunming, Yunnan, China.


Xiaodan Zheng,
Yunnan Provincial Key Laboratory of Stomatology, The Affiliated Stomatology Hospital of Kunming Medical University, Kunming, Yunnan, China.


Nanquan Rao,
a Yunnan Provincial Key Laboratory of Stomatology, The Affiliated Stomatology Hospital of Kunming Medical University, Kunming, Yunnan, China.


Yao Huang,
Yunnan Provincial Key Laboratory of Stomatology, The Affiliated Stomatology Hospital of Kunming Medical University, Kunming, Yunnan, China.


Juan Liu,
Yunnan Provincial Key Laboratory of Stomatology, The Affiliated Stomatology Hospital of Kunming Medical University, Kunming, Yunnan, China.


Yanhong Li,
Yunnan Provincial Key Laboratory of Stomatology, The Affiliated Stomatology Hospital of Kunming Medical University, Kunming, Yunnan, China.


Jun Zhang,
Yunnan Provincial Key Laboratory of Stomatology, The Affiliated Stomatology Hospital of Kunming Medical University, Kunming, Yunnan, China.

Please see the link here: https://stm.bookpi.org/ETDHR-V4/article/view/6051

Measuring Technological Heterogeneity Across Industries | Chapter 08 | New Innovations in Economics, Business and Management Vol. 5

 The goal of this research is to use an econometric model that accounts for cross-section dependence and heterogeneity of production technology in a panel setting to calculate the value of capital per growth in the Turkish manufacturing industry from 1980 to 2011. Pesaran's common correlated effects (CCE) type estimator is used in this case. Individual industry regression results, according to the study's findings, reveal apparent technical heterogeneity across industries.

Author(S) Details

Arzu Alvan
Cyprus Science University, Ozanköy, Girne, Mersin 10, Türkiye.

View Book:- https://stm.bookpi.org/NIEBM-V5/article/view/5620