scholarly journals A dimensionless approach for the runoff peak assessment: effects of the rainfall event structure

2017 ◽  
Author(s):  
Ilaria Gnecco ◽  
Anna Palla ◽  
Paolo La Barbera
Keyword(s):  
Analytical Framework ◽  
Event Structure ◽  
Rainfall Event ◽  
Hydrologic Response ◽  
Dimensionless Form ◽  
Constant Intensity ◽  
Internal Structures ◽  
Simple Power Function ◽  
The Impact ◽  
Analytical Expressions

Abstract. The present paper proposes a dimensionless analytical framework to predict the hydrologic response of a given catchment thus assessing the impact of the rainfall event structure on the runoff peak. The dimensionless form of the rainfall depth is described as a simple power function of the dimensionless duration. Soil abstractions are modelled using the Soil Conservation Service method and the Instantaneous Unit Hydrograph theory is undertaken to determine the dimensionless form of the hydrograph; the two-parameter gamma-distribution is selected to test the proposed methodology. A set of analytical expressions are derived in case of constant-intensity hyetograph to assess the highest runoff peak with respect to a given rainfall event structure irrespective of the specific catchment. Looking at the results, the curve of the highest values of the runoff peak reveals a local minimum point in the neighbourhood of d* and n values equal to 1 and 0.3, respectively. As an example, the proposed approach has been applied to analyse the hydrologic response of a small Mediterranean catchment to three observed rainfall events characterized by different rainfall internal structures.

scholarly journals A dimensionless approach for the runoff peak assessment: effects of the rainfall event structure

2018 ◽  
Vol 22 (2) ◽  
pp. 943-956 ◽  
Author(s):  
Ilaria Gnecco ◽  
Anna Palla ◽  
Paolo La Barbera
Keyword(s):  
Analytical Framework ◽  
Event Structure ◽  
Rainfall Event ◽  
Constant Intensity ◽  
Rainfall Events ◽  
System A ◽  
Study Case ◽  
Time Invariant ◽  
The Impact ◽  
Analytical Expressions

Abstract. The present paper proposes a dimensionless analytical framework to investigate the impact of the rainfall event structure on the hydrograph peak. To this end a methodology to describe the rainfall event structure is proposed based on the similarity with the depth–duration–frequency (DDF) curves. The rainfall input consists of a constant hyetograph where all the possible outcomes in the sample space of the rainfall structures can be condensed. Soil abstractions are modelled using the Soil Conservation Service method and the instantaneous unit hydrograph theory is undertaken to determine the dimensionless form of the hydrograph; the two-parameter gamma distribution is selected to test the proposed methodology. The dimensionless approach is introduced in order to implement the analytical framework to any study case (i.e. natural catchment) for which the model assumptions are valid (i.e. linear causative and time-invariant system). A set of analytical expressions are derived in the case of a constant-intensity hyetograph to assess the maximum runoff peak with respect to a given rainfall event structure irrespective of the specific catchment (such as the return period associated with the reference rainfall event). Looking at the results, the curve of the maximum values of the runoff peak reveals a local minimum point corresponding to the design hyetograph derived according to the statistical DDF curve. A specific catchment application is discussed in order to point out the dimensionless procedure implications and to provide some numerical examples of the rainfall structures with respect to observed rainfall events; finally their effects on the hydrograph peak are examined.

scholarly journals Droplet impact onto a spring-supported plate: analysis and simulations

2021 ◽  
Vol 128 (1) ◽  
Author(s):  
Michael J. Negus ◽  
Matthew R. Moore ◽  
James M. Oliver ◽  
Radu Cimpeanu
Keyword(s):  
High Speed ◽  
Flexible Substrate ◽  
Practical Importance ◽  
Hybrid Approach ◽  
Hydrodynamic Pressure ◽  
Analytical Framework ◽  
Canonical System ◽  
Linear Process ◽  
Plate Motion ◽  
The Impact

AbstractThe high-speed impact of a droplet onto a flexible substrate is a highly non-linear process of practical importance, which poses formidable modelling challenges in the context of fluid–structure interaction. We present two approaches aimed at investigating the canonical system of a droplet impacting onto a rigid plate supported by a spring and a dashpot: matched asymptotic expansions and direct numerical simulation (DNS). In the former, we derive a generalisation of inviscid Wagner theory to approximate the flow behaviour during the early stages of the impact. In the latter, we perform detailed DNS designed to validate the analytical framework, as well as provide insight into later times beyond the reach of the proposed analytical model. Drawing from both methods, we observe the strong influence that the mass of the plate, resistance of the dashpot, and stiffness of the spring have on the motion of the solid, which undergo forced damped oscillations. Furthermore, we examine how the plate motion affects the dynamics of the droplet, predominantly through altering its internal hydrodynamic pressure distribution. We build on the interplay between these techniques, demonstrating that a hybrid approach leads to improved model and computational development, as well as result interpretation, across multiple length and time scales.

Influence of Renminbi Internationalization on China’s Monetary Policy Effects: A Theoretical Analysis

2021 ◽  
Vol 13 (8) ◽  
pp. 14
Author(s):  
Huiguan Ding ◽  
Asli Ogunc ◽  
Dale Funderburk ◽  
Shiyou Li ◽  
Zhebie Shi
Keyword(s):  
Monetary Policy ◽  
Open Economy ◽  
Analytical Framework ◽  
Securities Markets ◽  
Republic Of China ◽  
Policy Effects ◽  
The People ◽  
The World ◽  
The Impact ◽  
Rmb Internationalization

For more than a decade, the People’s Republic of China has sought to expand the degree of internationalization of its official currency. In recent decades, China has become the world’s second largest economy, as well as the world’s largest trading nation, and its securities markets are among the largest in the world. Today, the RMB is among the top five as a world payments currency. One of the significant costs of achieving higher degrees of internationalization of a country’s currency is the complicating impact it has on the efficacy and effect of that country’s domestic monetary policy.  However, what is the nature and extent of that complicating impact? This paper employs an IS-LM model of an open economy as an analytical framework, embeds an RMB internationalization factor into that model. Specifically, with this model we examine the impact of RMB internationalization on the effects of China’s monetary policy. 

Human capital accumulation, income distribution, and economic growth: a demand-led analytical framework

2021 ◽  
Vol 9 (3) ◽  
pp. 319-336
Author(s):  
Gilberto Tadeu Lima ◽  
Laura Carvalho ◽  
Gustavo Pereira Serra
Keyword(s):  
Human Capital ◽  
Capital Accumulation ◽  
Analytical Framework ◽  
Output Growth ◽  
Human Capital Accumulation ◽  
Capital Utilization ◽  
Tax Rate ◽  
Long Run ◽  
The Impact ◽  
Long Run Equilibrium

This paper incorporates human capital accumulation through provision of universal public education by a balanced-budget government to a demand-driven analytical framework of functional distribution and growth of income. Human capital accumulation positively impacts on workers’ productivity in production and their bargaining power in wage negotiations. In the long-run equilibrium, a rise in the tax rate (which also denotes the share of output spent in human capital formation) lowers the pre- and after-tax wage share and physical capital utilization, and thus raises (lowers) the output growth rate when the latter is profit-led (wage-led). The impact of a higher tax rate on the employment rate (which also measures human capital utilization) in the long-run equilibrium is negative (ambiguous) when output growth is wage-led (profit-led). In any case, the supply of higher-skilled workers does not automatically create its own demand.

Strip yield model for multiple straight cracks with coalesced yield zones: A theoretical study

2021 ◽  
pp. 1-15
Author(s):  
S. Hasan ◽  
N. Akhtar ◽  
S. Shekhar
Keyword(s):  
Numerical Study ◽  
Multiple Cracks ◽  
Principle Of Superposition ◽  
Yield Model ◽  
Zone Length ◽  
Yield Zone ◽  
Strip Yield Model ◽  
Opening And Closing ◽  
The Impact ◽  
Analytical Expressions

The paper presents a complicated case of coalescence of yield zones between two internal cracks out of four collinear straight cracks weakened an infinite isotropic plate. Two solutions are presented for the case of opening and closing of multiple cracks under general yielding conditions. Using these two solutions and the principle of superposition, we found the analytical expressions for load-bearing capacity of the plate using complex variable method. A numerical study has been carried out to investigate the behavior of yield zone length concerning remotely applied stresses at the boundary of the plate and the impact of two outer cracks on the propagation of inner cracks due to coalesced yield zones. Results obtained are reported graphically.

scholarly journals In Search of Alignment: A Review of Impact Studies in Entrepreneurship Education

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Uladzimir Kamovich ◽  
Lene Foss
Keyword(s):  
Empirical Studies ◽  
Entrepreneurship Education ◽  
Analytical Framework ◽  
Future Research ◽  
Impact Studies ◽  
Teaching Objectives ◽  
Teaching Content ◽  
Instructional Processes ◽  
Scant Attention ◽  
The Impact

This study uses the concept of alignment as a framework to examine empirical research on the impact of entrepreneurship education interventions on students. Alignment assumes that effective instruction requires congruence between three instructional components: intended outcomes, instructional processes, and assessment criteria. Given the extant diversity and complexity of entrepreneurship education impact, scholars have not been able to explain how teaching approaches and methods are being adjusted to the variety of expected outcomes. In order to address this gap, we critically reviewed the published empirical studies on entrepreneurship education impact in 20 journals over a 15-year period (2000–2015). We found 16 empirical studies that met our inclusion criteria. Our findings revealed that teaching objectives, teaching methods, and teaching content receive scant attention from researchers. This study will be of value to scholars researching the impact of heterogeneous entrepreneurship education practices and approaches on individuals. Our analytical framework could contribute to less contradictory findings of entrepreneurship education impact studies. We also identify research limitations and suggest avenues for future research.

scholarly journals Analysis of Dynamic Magnetoelastic Coupling in Mechanically Driven Magnetoelectric Antennas

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 455
Author(s):  
Kevin Q. T. Luong ◽  
Yuanxun (Ethan) Wang
Keyword(s):  
Material Properties ◽  
New Technology ◽  
Operating Conditions ◽  
Dynamic Nature ◽  
Stepping Stones ◽  
Direct Role ◽  
Antenna Size ◽  
Magnetoelastic Coupling ◽  
The Impact ◽  
Analytical Expressions

Mechanically driven magnetoelectric antennas are a promising new technology that enable a reduction in antenna size by many orders of magnitude, as compared to conventional antennas. The magnetoelastic coupling in these antennas, a phenomenon playing a direct role in determining performance, has been modeled using approaches that are severely lacking in both accuracy and tractability. In response to this problem, we take a physics-based approach to the analysis of magnetoelastic coupling. We find that certain directions of applied stress will maximize the coupling and we derive general expressions to quantify it. Our results are applied in comprehensive simulations that demonstrate the dynamic nature of the coupling as well as the impact of various operating conditions and material properties. Our work contributes analytical expressions and associated insight that can serve not only as guidelines for the design of mechanically driven magnetoelectric antennas, but also as stepping stones towards the development of more accurate models.

scholarly journals DISTORSI KAPASITAS PERDAGANGAN INTER-REGIONAL IMT-GT Kasus Provinsi Terpilih di Sumatera Indonesia

2015 ◽  
Vol 11 (1) ◽  
pp. 44
Author(s):  
Benito Rio Avianto ◽  
Raldi Hendro Koestoer
Keyword(s):  
Analytical Framework ◽  
Economic Cooperation ◽  
Fixed Effect ◽  
Data Series ◽  
Regional Study ◽  
Regional Economic ◽  
Trade Sector ◽  
The Impact ◽  
Effect Method

The objective of the paper was to understand the impact of sub regional economic cooperation, known as the Indonesia-Malaysia-Thailand Growth Triangle (IMT-GT), on trade sector in Indonesia. The approach of research based on export macro information by provinces and commodities. The method used in the analytical framework was a fixed effect method. The regional study covered Nanggroe Aceh Darussalam, North Sumatera, West Sumatera, and Riau provinces, and the commodities involved CPO, coffee and rubber, with 1990-2008 data series. Based on pooled regression, there was a significant impact on export from the four provinces to Malaysia and Thailand for all based years. One might focus on commodity level that, in fact, CPO was the only one commodity that had a significant impact within the IMTGT region. In addition, Thai Bath and Malaysian Ringgit, with respect to GDP for both countries, had significant influenced on export, especially after the IMT-GT endorsed.

scholarly journals Tika Tonu: Young Māori Mothers' Experiences of Wellbeing Surrounding the Birth of their First Tamaiti

2021 ◽  
Author(s):  
◽  
Aria Graham
Keyword(s):  
Research Method ◽  
Analytical Framework ◽  
Theoretical Framework ◽  
Gender And Sexuality ◽  
Health Experiences ◽  
Kaupapa Māori ◽  
Ideologies Of Motherhood ◽  
The Impact ◽  
Deficit Discourses ◽  
Maternal Wellbeing

<p>The wellbeing experiences of young Māori mothers’ (ngā māmā) surrounding the birth of their first tamaiti and the impact of those experiences, often determine outcomes for wāhine Māori, their tamariki and whānau. A greater understanding and nurturing of young Māori mothers has far reaching implications that encompass hapū, iwi, community, Aotearoa and the health experiences and outcomes of Indigenous and other subjugated people in the global community. However, there is little exploration and information about the wellbeing experiences of young Māori mothers, and therefore little is known about their stories, thoughts, and feelings from their experiences.  This thesis explores the experiences of young Māori mothers from their perspective, regarding pregnancy, birth and motherhood. Historical misrepresentation, western notions of gender and sexuality, negative statistics and reports have portrayed young Māori mothers as the least capable, least desired and deficient. Dominant western ideologies of motherhood and hegemonic perceptions fail to recognise the essence of wellbeing for young Māori mothers, and instead marginalise and render their aspirations invisible and irrelevant. This thesis brings to the fore the elements that ngā māmā signal as vital to their wellbeing.  By utilising a kaupapa Māori approach to methodology, and a theoretical framework of kaupapa Māori and mana wahine, this thesis explores what matters to ngā māmā and their wellbeing, and how te ao Māori is an intrinsic part of those experiences. An integrated kaupapa Māori analytical framework is presented, which was developed for the thesis as a legitimate and authentic approach to research method and design to help make sense of and assemble the codes, symbolism and themes of the data.  The findings of this thesis signify the power of the female to influence the wellbeing of ngā māmā through stability, guidance and empowerment. The thesis captures the tamaiti as ‘tohu aroha’, and explicates the journey of ngā māmā to greater rangatiratanga and identity. Furthermore, the vitality and balance of te ao Māori within the lives of ngā māmā contributes to what is significant to their experiences of wellbeing. The thesis emancipates ngā māmā from entrenched stereotypes by epitomising their experiences and thus denouncing deficit discourses, and advances the aspirations of ngā māmā and the lives of their tamariki and whānau. This thesis makes an original and complementary contribution to the growing knowledge around Māori maternal wellbeing, kaupapa Māori methodology and research.</p>

scholarly journals Sekuritisasi China Fine Dust oleh Pemerintah Korea Selatan terhadap Tiongkok

2021 ◽  
Vol 2 (2) ◽  
pp. 111-141
Author(s):  
Eryolanda Putri Nabila
Keyword(s):  
South Korea ◽  
Analytical Framework ◽  
Political Agenda ◽  
Fine Dust ◽  
Literature Study ◽  
South Korean Government ◽  
The Public ◽  
South Korean ◽  
Political Management ◽  
The Impact

China Fine Dust issue has emerged in 2013 and increase in 2014 so that South Korea suffered from the impact. Meanwhile, China as a contributor of the haze refuses to take responsibility for tackling this issue, so that South Korea must securitize. This study aims to describe the process of securitization of China Fine Dust issue carried out by South Korea to China by using the concept of securitization by Barry Buzan as an analytical framework. The research method used is a qualitative method with a descriptive approach. The data used in this research was collected through literature study. The securitization process carried out by the South Korean Government against China began with South Korea carrying out a scientific agenda to identify a threat with China's initial involvement of 48%. Then political agenda, which are three points; influencing the public to gain support, forming a domestic emergency policy, holding a bilateral meeting to convince China to work together because domestic actions are not enough yet. The continuation of political management shows that the agenda of securitization carried out by South Korea made China accept the issue as a threat and agreed to cooperate in tackling the haze issue by releasing several projects.

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