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نتیجه جستجو - طولی

تعداد مقالات یافته شده: 81
ردیف عنوان نوع
1 یک اسکریپت Matlab برای آنالیز مورفومتریک رودخانه‌ها، کانال‌ها و دره‌های روی زمینی، زیرآبی و فرا زمینی
سال انتشار: 2022 - تعداد صفحات فایل pdf انگلیسی: 8 - تعداد صفحات فایل doc فارسی: 29
ویژگی های مورفومتریک نقش مهمی در طبقه بندی و مدل سازی سیستم های رودخانه ای دارند. تمرکز تحقیقات گذشته بر شباهت‌ بین سیستم‌های زیرآبی و فرازمینی ناشناخته و سیستم‌های رودخانه‌ای رو زمینی است، اما اکنون مطالعات جزئی و دقیق دره و کانال زیرآبی در دریاچه‌ها، مخازن، اقیانوس‌ها و سیستم‌های فرازمینی افزایش یافته است. در این مطالعات، اغلب فقط چند ویژگی مورفومتریک (به عنوان مثال، شیب بستر، پهنای کرانه، شعاع خط مرکزی در نوک خم، عمق کرانه‌) در نظر گرفته می شد، که علت آن فقدان ابزاری کارآمد برای تعیین این ویژگی‌ها بود. در این راستا، یک اسکریپت Matlab ساده برای تعیین مهم‌ترین ویژگی‌های مورفومتریک رودخانه‌ها، کانال‌ها و دره‌های رو زمینی، زیرآبی و فرازمینی ارائه شد. تنها ورودی‌های مورد نیاز این اسکریپت ، خاکریز یا تاج‌های کناره خاکریز است که تعریف خط مرکزی را به‌عنوان مبنای سیستم مرجع خمیده خطی کانال محور امکان‌پذیر می‌ کند و به محاسبه ویژگی‌های پلان‌فرم (به عنوان مثال، عرض کامل، انحنای تدریجی متغیر، سینوسی) می پردازد. در صورتی که داده‌های رقومی ارتفاع بیومتری یا توپوگرافی وجود داشته باشد و قابل تبدیل به سیستم مرجع خمیده خطی کانال‌مرکز باشند، بنابراین امکان تعیین شیب بستر طولی و ویژگی‌های بیشتر مورفومتریک در سطح مقطع های عرضی (به عنوان مثال، عمق کرانه، سطح مقطع، و شیب های کناره ها یا سیلاب ها) فراهم می شود. این اسکریپت به عنوان مثال بر دره زیر آبی در دریاچه کنستانس اجرا شد. این اسکریپت ابزاری کارآمد برای آنالیز مقدار روزافزون مدل‌های ارتفاعی دیجیتال (DEMs) در رودخانه‌ها، کانال‌ها و دره‌های رو زمینی، زیرآبی و فرازمینی است. این اسکریپت به ویژه برای سیستم‌های زیر آبی که درک آن ها ضعیف است، مناسب بوده و به درک بزرگترین سیستم‌های دره و کانال کمک می‌کند.
کلمات کلیدی: رانندگی خودکار | محلی سازی سطح لاین | تشخیص لاین | GNSS | GPS | تطبیق نقشه
مقاله ترجمه شده
2 Dynamic familiness capabilities and family business growth: A longitudinal perspective framed within management accounting
قابلیت‌های خانوادگی پویا و رشد کسب‌وکار خانوادگی: چشم‌انداز طولی در حسابداری مدیریت-2021
This paper examines how dynamic capabilities evolve in relation to familiness resources in order to facilitate family business growth and the way the context underpins dynamic capabilities in the family business. Drawing on an abductive research logic, it explores through a longitudinal in-depth case study and document analysis the way that dynamic capabilities and familiness resources have been deployed by a Greek-owned international shipping company over a twenty-five-year period. The findings highlight the influences exerted by the con- trolling family on the searching, seizing, and reconfiguring processes within management accounting to enable the reconfiguration of familiness resources in the firm across the dimensions of product strategy, governance, networking and staffing, and financing. These reconfigurations are essential in facilitating company development throughout critical growth junctures. We provide theoretical extensions to the resource-based view (RBV) through an integration of the concept of familiness and dynamic capability view, contextualized theorization, and temporal theorization.
keywords: کسب و کار خانواده | حسابداری مدیریت | قابلیت های پویا | خانوادگی | دیدگاه مبتنی بر منابع | منابع استراتژیک | Family business | Management accounting | Dynamic capabilities | Familiness | Resource-based view | Strategic resources
مقاله انگلیسی
3 Top management team characteristics and digital innovation: Exploring digital knowledge and TMT interfaces
ویژگی های تیم مدیریت بالا و نوآوری دیجیتال: بررسی دانش دیجیتال و رابط TMT-2021
On their journey toward digital transformation, industrial firms need to embrace digital inno- vation. The top management team (TMT) is expected to set the course for digital innovation, which is a challenging endeavour given the novel and cross-functional nature of digital innova- tion. We draw on role theory to make sense of emerging role requirements for the TMT and combine this view with upper echelon theory to hypothesize on the specific TMT characteristics that are needed for digital innovation. We first theorize that firms could benefit from TMT digital knowledge. Second, we argue that the effective utilization of TMT digital knowledge can be fostered at internal TMT interfaces, such as between the chief executive officer (CEO), respec- tively a chief digital officer (CDO), and other top managers. Finally, we consider the TMT hier- archical structure as a contextual factor in the stimulation of TMT integration processes by integrative CEOs and CDOs. We employ panel data regressions to a longitudinal dataset of US industrial firms and find a positive relation between TMT digital knowledge and digital inno- vation, on average. We additionally find evidence for the integrative roles of CEOs and CDOs. However, our findings also indicate that the CDO’s integrating role can be hampered by a strong hierarchical structure in the TMT.
keywords: دانش دیجیتال TMT | نوآوری دیجیتال | رابط TMT | افسران ارشد دیجیتال | ساختار سلسله مراتبی TMT | TMT digital knowledge | Digital innovation | TMT interfaces | Chief digital officers | TMT hierarchical structure
مقاله انگلیسی
4 Accounting for repetition and dropout in contemporaneous cross-section learning profiles: Evidence from Rwanda
حسابداری برای تکرار و رها کردن در پروفایل های یادگیری مقطع مقطع مقطعی: شواهد از رواندا-2021
How much do children learn in a year of school? Longitudinal data that tracks children over time is scarce in developing countries, and so recent studies estimate learning profiles by comparing the ability of people with different amounts of schooling, at a single point in time. Such estimates of the effect of schooling on learning may be biased upwards by not controlling for repetition and dropout. In this paper I estimate contemporaneous cross- section learning profiles for Rwanda, using data from a nationally representative survey of 3053 children aged six to eighteen. I show how adjusting this learning profile for the total number of years enrolled in school (ac- counting for repetition and dropout), using detailed schooling histories, reduces the average amount learnt per year by over 60 percent. The learning profile for Rwanda is not just too flat, but flatter than previous estimates suggest.
keywords: یادگیری | ارزیابی | رواندا | تکرار | Learning | Assessment | Rwanda | Repetition
مقاله انگلیسی
5 What makes a successful academic accounting department? A multidimensional longitudinal analysis
چه چیزی باعث موفقیت یک بخش حسابداری دانشگاهی می شود؟ تحلیل طولی چند بعدی-2021
The accounting educational literature is heavily focused on the characteristics and productivity of individual faculty members. The research contributions of these individuals are also aggregated by their departmental affiliations. However, very little work focuses upon how accounting departments are built and how they change over time. To evaluate the change in accounting departments over several decades, a detailed look at the major schools of one state (Ohio) is offered by this paper. Implications for the management of academic departments are offered, and suggestions for future research are made.
Keyword: Academic accounting departments | Tenure-track accounting faculty | Academic careers | Faculty recruiting | Departmental research productivity
مقاله انگلیسی
6 Internal benchmarking to assess the cost efficiency of a broiler production system combining data envelopment analysis and throughput accounting
محک گذاری داخلی برای ارزیابی کارایی هزینه سیستم تولید جوجه های گوشتی با ترکیب تحلیل پوششی داده ها و حسابداری توان عملیاتی-2021
Economic efficiency assessments based on Data Envelopment Analysis are scarce compared to technical effi- ciency studies, even in for-profit firms. Some aspects justify this scarcity, such as the difficulty to estimate ac- curate prices, given their variability over time. In many situations, external benchmarking is hindered due to organizations’ unique nature and the barriers to sharing information considered critical to competitiveness. The use of internal benchmarking can overcome some of these difficulties. This study conducted an internal benchmarking analysis of a broiler production system, focusing on cost efficiency. We conducted longitudinal case-based research over six years (2014–2019). The concepts of throughput accounting of the Theory of Con- straints were applied to structure the DEA model (inputs, prices, and output). The Critical Incident Technique was used to explore the effects of interventions on the production system’s cost efficiency. The results show that the broiler production system could reduce 32% of the total cost per unit of production if the balance of inputs suggested by the DEA evaluation was used. This work contributes to the literature by showing the potential of internal benchmarking to explore the evolution of cost efficiency over time. From a practical perspective, this study is important for managers by showing how to measure the impact of management actions on performance, providing valuable information to guide continuous improvement.
keywords: بهره وری اقتصادی | بهره وری هزینه | معیار سنج داخلی | تحلیل پوششی داده ها | تولید جوجه های گوشتی | حسابداری | Economic efficiency | Cost efficiency | Internal benchmarking | Data envelopment analysis | Broiler production | Throughput accounting
مقاله انگلیسی
7 Resilience to crises of Thai MICE stakeholders: A longitudinal study of the destination image of Thailand as a MICE destination
مقاومت در برابر بحران های ذینفعان MICE تایلند: مطالعه طولی تصویر مقصد تایلند به عنوان مقصد MICE-2020
The COVID-19 outbreak has changed rapidly the business operation and travel behavior of global communities and calls for research on resilience. This study aims to identify the changing destination image of Thailand as a MICE destination during crises and examine the resilience of Thai MICE stakeholders. A mixed method of qualitative and quantitative design was employed using interviews, observations and questionnaire surveys. A longitudinal study of Thai MICE stakeholders during 14 years revealed that the Buddhist concepts of resilience and Thainess contribute to psychological resilience. Buddhism and Thainess cultivate the concept of crisis concierge. Surveys showed unchanged image of exhibition facilities during the political instability. Thailands incentive travel benefits from the availability of bleisure (a combination of business and leisure) attractions. Good value for money, Thai hospitality, bleisure attractions, and international standard venues are key resilient factors.
Keywords: Destination image | Risk perception | Crisis management | Political instability | Meeting | Incentive travel | Convention | Exhibition (MICE) stakeholders | Thailand | Thainess | Buddhism | Business travelers
مقاله انگلیسی
8 Exploring the potential association between gang membership and health outcomes in a longitudinal sample of youth and young adults
بررسی ارتباط بالقوه بین عضویت در گروه و نتایج سلامت در یک نمونه طولی از جوانان و بزرگسالان-2020
Purpose: Health criminology is an emerging line of inquiry that has focused on the association between crime/ criminality and health outcomes. The current study sought to add to this literature by examining the potential connection between gang membership and health problems and brain-based disorders. Methods: Data from the National Longitudinal Study of Adolescent to Adult Health (Add Health) were analyzed. Results: The results revealed that gang membership was associated with only two (cancer and high blood pressure) of the potential 12 health problems and brain-based disorders. Additional analyses indicated that gang membership was related to a combined measure of health problems, but not to a combined measure of brainbased disorders or to a cumulative measure of health problems. Supplemental analysis also revealed that gang membership was associated with an increased odds of being shot or stabbed. Conclusions: Gang membership does not appear to have sweeping negative effects on general health and brainbased disorders through young adulthood. We conclude by discussing the limitations of the study and directions for future research.
Keywords: Add health | Crime | Disorders | Gangs | Health
مقاله انگلیسی
9 School suspension and social selection: Labeling, network change, and adolescent, academic achievement
تعلیق مدرسه و انتخاب اجتماعی: برچسب زدن ، تغییر شبکه و نوجوانان ، پیشرفت تحصیلی-2020
The growing body of research detailing the pronounced effects of criminal stigma on inequality in the US underscores the importance of labeling theory. In spite of the renewed interest in labeling, little research has evaluated the theoretical mechanisms underlying the theory. Drawing on the labeling perspective, this article evaluates mechanisms underlying the relationship between school punishment and reductions in adolescent academic achievement. It uses recent innovations in longitudinal network analysis to examine the consequences of school punishment as a dynamic interplay of labeling, network selection, and group influence. Results indicate that school punishment facilitates selection into academically underperforming peer networks and that this change in network composition is largely responsible for the association between school punishment and reductions in adolescent academic achievement.
Keywords: Labeling | School punishment | Social networks | Academic achievement | Longitudinal network analysis
مقاله انگلیسی
10 A longitudinal evaluation of a survivor-mentor program for child survivors of sex trafficking in the United States
ارزیابی طولی از یک برنامه مربی بازمانده برای کودکان بازمانده از قاچاق جنسی در ایالات متحده-2020
Background: Commercial sexual exploitation (CSE) of children is a significant public health and criminal justice problem, but there are few evaluated models of CSE mentorship service. Objectives: To assess whether youth who participated in a CSE survivor-mentor program evidenced changes in CSE victimization, dating abuse victimization, health, delinquency, social support, and coping during the year following their enrollment in the program. Participants: 41 youth who were CSE-experienced at baseline (72%) or determined very high risk, 11–18 years old, 95% female, 58% heterosexual, 29% White, 29% Hispanic, and 42% other races/ethnicities. Setting: An urban city in the Northeast United States. Methods: We used a one-group repeated measures design and a GEE analysis. Data were collected at baseline, six months after baseline (71% follow-up) and 12 months after baseline (68% followup). Results: At baseline 72% could be characterized as CSE-experienced, while at 6 months the percentage decreased to 24% (p < 0.001) and at 12 months to 14% (p < 0.001). After 6 months of receiving survivor-mentor services, youth were less likely to have experienced CSE, engaged in sexually explicit behavior (SEB), used illicit drugs, engaged in delinquent behavior, been arrested or detained by police, and they had better social support and coping skills. After 12 months, youth were less likely to have experienced CSE, to have engaged in delinquent behavior, be arrested or detained by police, and had improved coping skills. Conclusion: Findings demonstrate that youth who received survivor-mentor services from MLMC experienced improved well-being and less drug use, delinquent behavior, and exploitation.
Keywords: Commercial sexual exploitation | Human trafficking | CSEC | Domestic minor sex trafficking | Secondary prevention | Adolescent health
مقاله انگلیسی
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