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result(s) for
"Safari, Hamid"
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Elite athletes’ lifestyles: Consumerism to professionalism
by
Mohamadi Turkmani, Ehsan
,
Safari Jafarloo, Hamid Reza
,
Dehghan Ghahfarokhi, Amin
in
Addictions
,
Analysis
,
Athletes
2022
Today, elite athletes form an important social group, and the non-sport facets of their lives matter as much as their sports performances. However, there has been little empirical research on the lifestyles of elite athletes. Therefore, this study aimed to develop knowledge about the Iranian elite athletes’ lifestyle. The study was conducted with a qualitative approach in two phases. Glaserian grounded theory was used in the first phase, and thematic analysis was used in the second phase. Participants of the first phase included 19 sports experts, such as sports sociologists, sports psychologists, and sports coaches, who were selected by purposive and snowball sampling methods for holding unstructured in-depth interviews. The data were simultaneously analyzed using a set of open, theoretical, selective coding and memos. The codes were grouped into three different categories with different natures. The emerged theory advanced our understanding of the lifestyle shaping structures of elite athletes, lifestyle indicators, and even professionalization of their lifestyles. According to the results, the Iranian elite athletes’ lifestyles include indicators, such as professional mindset, competencies, life vision, financial literacy, responsibility, consumption, leisure, personal issues, and religious behavior. Subjects of the second phase were 44 Iranian athletes in the national levels who participated voluntarily in the study. The data were analyzed by thematic analysis method, and lifestyles typologies were identified. Based on results, five dominant lifestyles among the Iranian elite athletes were identified: consumerist, easy going, socially useful, profit-oriented, and professional. Finally, the features of each lifestyle were discussed.
Journal Article
Electromechanical Behavior of Axially Continuous Graphene–Copper Wires
2025
Graphene–copper (Gr–Cu) composite conductors have demonstrated Gr‐enhanced electrical and thermal properties. However, the conductors’ coupled mechanical and electrical responses remain unexplored despite the importance of their mechanical flexibility and robustness. Here, the electromechanical behavior of a recently developed microscale Gr‐Cu composite, called axially continuous graphene–copper (ACGC) wire, has been investigated by developing and utilizing a customized tensile testing method. Experimental studies have shown that 80 μm‐diameter ACGC (hereafter ACGC80) wires exhibit 3.681% and 3.173% higher compared to as‐received and annealed Cu wires, respectively. More importantly, the Gr‐enhanced electrical performance of the ACGC80 has been observed even after significant plastic deformation under uniaxial tension. To be specific, the conductivity of ACGC80 is 3.139%, 3.144%, and 3.088% higher than that of annealed copper wire at 3, 6, and 9% strain, respectively. Analysis indicates that ACGC80 deforms by forming highly localized plastic deformation zones along its length. This result suggests that graphene in ACGC80 serves as an effective electron pathway even after applying a large strain because the pronounced damage to graphene is limited to only a small fraction of ACGC80. The ACGC80 conductor has great potential to advance emerging applications in flexible interconnects, wearable electronics, and high‐power transmission for microchips. This study investigates the electromechanical behavior of 80 μm‐diameter axially continuous graphene–copper (ACGC80) wires by developing a customized tensile testing method. Experimental studies have shown that ACGC80 wires exhibit higher electrical conductivity compared to as‐received and annealed Cu wires, and more importantly, the Gr‐enhanced electrical performance of the ACGC80 has been observed even after significant plastic deformation under uniaxial tension.
Journal Article
Lessons Learned From the Glaserian Grounded Theory Approach: Professionalizing as a Basic Social Process in Elite Athletes’ Lifestyle
by
Mohamadi Turkmani, Ehsan
,
Safari Jafarloo, Hamid Reza
,
Ghorbani, Mohammad Hossein
in
Athletes
,
Classification
,
Concept mapping
2022
This paper presents a qualitative study conducted using the Glaserian grounded theory (GT) method. Glaser’s approach to GT differs from Strauss and Corbin’s method, which is more widespread. There are some differences in the focus on participants’ concerns, staying in the research environment for an extended period to discover participants’ main concerns and the emergence of a basic social process around the core category. The Glaserian GT method was used to understand elite athletes’ lifestyles. Two groups of athletes and non-athletes were recruited for the interview as the sample. The core category was determined through iterative coding, memoing, theoretical sampling, and theoretical sorting. There were overlaps in these phases; they fluctuated back and forth and were not as clear-cut as they could be. Results showed the lifestyle components of elite athletes. Besides identifying participants’ main concerns, the results also demonstrated how to address them over time. It is a category of a basic social process named “professionalizing.” Lastly, the steps of creating a concept map are explained practically, which in addition to sports science scholars, can be considered by researchers in other fields.
Journal Article
The Effects of Aqueous Extract of Eryngium Campestre on Ethylene Glycol-Induced Calcium Oxalate Kidney Stone in Rats
by
Naghizadeh, Mohammad Sadegh
,
Safari, Hamid Reza
,
Esmaeili, Sajjad
in
Cytokines
,
Kidney stones
,
Kidneys
2019
This study aimed to evaluate the anti-inflammatory effect of E. campestre using the aqueous extracts, obtained from the aerial parts, on Ethylene Glycol (EG)-induced calcium oxalate kidney stone in rats.
64 male Wistar rats were randomly divided into 8 groups. Group I was considered as negative control and received normal saline for 30 days, group II as kidney stone control received EG for 30 days, groups III to VI as prophylactic treatment received EG plus 100, 200 or 400 mg/kg extracts for 30 days and groups VI to VIII received EG as therapy from day one and 100, 200 or 400 mg/kg extract from the 15th day. On the 30thday from the start of induction, rats were euthanized. Blood was collected and the kidneys were immediately excised. Slides from each one's kidneys were prepared and stained with Hematoxylin & Eosin method. Also levels of interleukin-1 beta (IL-1?) and interleukin-6 (IL-6) were determined in rat's serum by competitive ELISA kit.
E. campestre reduced IL-1? and IL-6 levels, showing a significant reduction for both cytokines in all prophylactic groups, especially at the dose of 400 mg/kg (P-value < .001). Moreover, IL-1? (p = .011) reduced significantly in the therapy groups in 400 mg/kg dose. Crystal count reduction was seen in all prophylactic and therapy groups in comparison with group II.
These results suggest that the E. campestre extract has potent suppressive effect on pro-inflammatory cytokine production in rat. Also, E. campestre decreases crystal deposition in the kidney of the hyperoxaluric rat.
Journal Article
Elite athletes' lifestyles: Consumerism to professionalism
Today, elite athletes form an important social group, and the non-sport facets of their lives matter as much as their sports performances. However, there has been little empirical research on the lifestyles of elite athletes. Therefore, this study aimed to develop knowledge about the Iranian elite athletes' lifestyle. The study was conducted with a qualitative approach in two phases. Glaserian grounded theory was used in the first phase, and thematic analysis was used in the second phase. Participants of the first phase included 19 sports experts, such as sports sociologists, sports psychologists, and sports coaches, who were selected by purposive and snowball sampling methods for holding unstructured in-depth interviews. The data were simultaneously analyzed using a set of open, theoretical, selective coding and memos. The codes were grouped into three different categories with different natures. The emerged theory advanced our understanding of the lifestyle shaping structures of elite athletes, lifestyle indicators, and even professionalization of their lifestyles. According to the results, the Iranian elite athletes' lifestyles include indicators, such as professional mindset, competencies, life vision, financial literacy, responsibility, consumption, leisure, personal issues, and religious behavior. Subjects of the second phase were 44 Iranian athletes in the national levels who participated voluntarily in the study. The data were analyzed by thematic analysis method, and lifestyles typologies were identified. Based on results, five dominant lifestyles among the Iranian elite athletes were identified: consumerist, easy going, socially useful, profit-oriented, and professional. Finally, the features of each lifestyle were discussed.
Journal Article
Flat space holography in spin-2 extended dilaton-gravity
2021
We present an interacting spin-2 gauge theory coupled to the two-dimensional dilaton-gravity in flat spacetime. The asymptotic symmetry group is enhanced to the central extension of Diff\\((S^1)\\ltimes C^\\infty(S^1)\\ltimes\\)Vec(\\(S^1\\)) when the central element of the Heisenberg subgroup is zero (vanishing \\(U(1)\\) level). Using the BF-formulation of the model we derive the corresponding boundary coadjoint action which is the spin-2 extension of the warped Schwarzian theory at vanishing \\(U(1)\\) level. We also discuss the thermodynamics of black holes in this model.
Electrical Conductivity of Copper-Graphene (Cu-Gr) Composites: The Underlying Mechanisms of Ultrahigh Conductivity
by
Kang, Wonmo
,
Celano, Umberto
,
Das, Uschuas Dipta
in
Chemical vapor deposition
,
Conductors
,
Copper
2025
Copper-graphene composite (CGC) conductors are widely considered as a potential alternative to pure copper (Cu). Yet, the effect of graphene (Gr) on the electrical conductivity of CGCs remains elusive, and their electrical performance is still controversial. This work addresses these unresolved questions by unambiguously quantifying how the electrical properties of CGCs depend on the characteristics of Gr and Cu. Gr is synthesized on Cu foils, foams, and wires by utilizing a wide range of chemical vapor deposition conditions to independently control their characteristics. Then the Gr-enhanced electrical conductivity ({\\Delta}{\\sigma}) is characterized for CGCs with different Cu geometries and Gr qualities. This study confirms that unprecedented electrical conductivity ({\\Delta}{\\sigma} = 17.1%) can be achieved only when both Gr and Cu are carefully optimized. Specifically, the study reveals three key factors: (1) {\\Delta}{\\sigma} is positively correlated with continuity of Gr; (2) CGCs with a continuous monolayer Gr exhibit a strong {\\Delta}{\\sigma}-A_s linear relation where A_s is the specific surface area of a CGC; and (3) {\\Delta}{\\sigma} becomes more pronounced when a Cu matrix has a curved cross-section. This work reveals the fundamental mechanisms of how Gr influences the overall electrical conductivity of CGCs and, therefore, is a crucial step toward designing and manufacturing high-performance CGC conductors for emerging applications.
Electrical Conductivity of Copper-Graphene (Cu-Gr) Composites: The Underlying Mechanisms of Ultrahigh Conductivity
by
Kang, Wonmo
,
Celano, Umberto
,
Das, Uschuas Dipta
in
Chemical vapor deposition
,
Conductors
,
Copper
2025
Copper-graphene composite (CGC) conductors are widely considered as a potential alternative to pure copper (Cu). Yet, the effect of graphene (Gr) on the electrical conductivity of CGCs remains elusive, and their electrical performance is still controversial. This work addresses these unresolved questions by unambiguously quantifying how the electrical properties of CGCs depend on the characteristics of Gr and Cu. Gr is synthesized on Cu foils, foams, and wires by utilizing a wide range of chemical vapor deposition conditions to independently control their characteristics. Then the Gr-enhanced electrical conductivity () is characterized for CGCs with different Cu geometries and Gr qualities. This study confirms that unprecedented electrical conductivity ( = 17.1%) can be achieved only when both Gr and Cu are carefully optimized. Specifically, the study reveals three key factors: (1) is positively correlated with continuity of Gr; (2) CGCs with a continuous monolayer Gr exhibit a strong -A_s linear relation where A_s is the specific surface area of a CGC; and (3) becomes more pronounced when a Cu matrix has a curved cross-section. This work reveals the fundamental mechanisms of how Gr influences the overall electrical conductivity of CGCs and, therefore, is a crucial step toward designing and manufacturing high-performance CGC conductors for emerging applications.