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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |
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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 |