A critical analysis on the energy and exergy performance of photovoltaic/thermal (PV/T) system: The role of nanofluids stability and synthesizing method

2022 ◽  
Vol 51 ◽  
pp. 101887
Author(s):  
Seyed Masoud Parsa ◽  
Alireza Yazdani ◽  
Hossein Aberoumand ◽  
Yousef Farhadi ◽  
Abolfazl Ansari ◽  
...  
Keyword(s):  
Critical Analysis ◽  
Energy And Exergy ◽  
Exergy Performance ◽  
T System

scholarly journals Energy and exergy analyses of PV, solar thermal and photovoltaic/thermal systems: a comparison study

2020 ◽  
Author(s):  
Jiang Qingyang ◽  
Yang Jichun ◽  
Zeng Yanying ◽  
Fu Huide
Keyword(s):  
Solar Thermal ◽  
Input Output ◽  
Pv System ◽  
Thermal Systems ◽  
Solar Systems ◽  
Space Reduction ◽  
Energy And Exergy ◽  
Semi Empirical ◽  
Exergy Performance ◽  
T System

ABSTRACT Compared with photovoltaic (PV) or solar thermal (ST) system alone, the hybrid photovoltaic/thermal (PV/T) system has many advantages such as simultaneous production of electrical and thermal energies, efficient utilization on solar energy, space reduction and so on. However, there is limited data on both the energy and exergy performance comparisons of these three solar systems, especially for annual performance data. This paper aims to present a comparative study on the performances of the PV, ST and PV/T systems by a series of full-day experiments. Energy and exergy performances of these three solar utilization systems were all calculated and analyzed. Moreover, two typical evaluation methods, i.e. semi-empirical system efficiency model method and input–output method, were also used for evaluating the performances of these systems. Finally, based on the input–output method, the annual performances of the PV, ST and PV/T systems under typical meteorological conditions of Hong Kong region were predicted. The results show that the ST system has the highest total energy gain and energy efficiency and the PV system has the highest total exergy gain and exergy efficiency of these three systems. However, by a comprehensive consideration on the energy and exergy performances, the PV/T system has the best overall performance of these three solar systems.

The role of Constitutional Courts in Transitional Justice: Colombia and South Africa

2016 ◽  
Vol 9 (15) ◽  
Author(s):  
Nadiehezka Paola Palencia Tejedor
Keyword(s):  
South Africa ◽  
Structural Analysis ◽  
Transitional Justice ◽  
Critical Analysis ◽  
Historical Context ◽  
Constitutional Courts ◽  
Political Background ◽  
Similarities And Differences ◽  
Peace And Reconciliation

This work focuses on a compared analysis of the South Afri- can decision related to the “peace and reconciliation act” of this country’s Parliament, and the Colombian decision regarding the amendment of the constitution called “The juridical framework for the peace.” Turning to the structure, it is developed in three major topics: 1. It provides a brief of the historical context, political background and an overview of the two decisions.2. It gives a structural analysis of the powers that each Court has and the nature of the constitutional mechanism through which both Courts decided the constitutionality of the said norms 3. It presents a critical analysis on the similarities and differences between the two systems and judgments. It presents some con- clusions. 

Therapeutic role of vegetables in Respiratory Diseases – A critical review from Ayurvedic classics.

2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Dr. Raghavendra Naik ◽  
Shweta Vekariya ◽  
R. N. Acharya ◽  
Sneha D. Borkar
Keyword(s):  
Clinical Practice ◽  
Respiratory Disease ◽  
Respiratory System ◽  
Critical Review ◽  
Critical Analysis ◽  
Respiratory Diseases ◽  
Unique Contribution ◽  
Pharmacological Activities ◽  
The Family

The concept of Pathya (wholesome diet) is an unique contribution of Ayurveda, which plays an important role in prevention and management of many diseases. “Shakavarga”, a category under dietetics in classical texts of Ayurveda enlisted different vegetables with their properties and indications in different disease conditions. These vegetables can be prescribed as Pathya (wholesome diet) in clinical practice. In the present review, plants described under Shakavarga, indicated as Pathya in different diseases related to Pranavaha Srotas (Respiratory system) were compiled from 15 different Ayurvedic classical texts. Critical analysis of the compiled data reveals that out of 332 vegetables described under Shakavarga, 44 are indicated in respiratory disease like Shvasa (Dyspnoea/Asthma), Kasa (Cough), Peenasa (Chronic rhinitis) and Hikka (Hiccup). Among them, botanical identity of 42 classical plants has been established and maximum number of vegetables belongs to the family cucurbitaceae (10) followed by solanaceae (4). Some of these vegetables have been reported for their various pharmacological activities related to prevention and management of diseases related to Pranavaha Srotas (Respiratory system). These vegetables are reported for their anti-inflammatory (16), antioxidant (14), anti-allergic (6) and antitussive (3) activities. The observed result may be helpful in use of vegetables as Pathya (wholesome diet) and planning further scientific studies about the efficacy of these plants on prevention as well as management of respiratory diseases.

The Role of Vertebral Body Tethering in Treating Skeletally Immature Scoliosis

2021 ◽  
pp. 155633162110088
Author(s):  
Blake C. Meza ◽  
Andre M. Samuel ◽  
Todd J. Albert
Keyword(s):  
Vertebral Body ◽  
Revision Surgery ◽  
Critical Analysis ◽  
Posterior Spinal Fusion ◽  
Future Research ◽  
Skeletally Immature ◽  
Postoperative Results ◽  
Radiographic Outcomes ◽  
Novel Technology

This is a critical analysis of a study by Hoernschemeyer et al, “Anterior Vertebral Body Tethering for Adolescent Scoliosis with Growth Remaining: A Retrospective Review of 2 to 5-Year Postoperative Results” ( J Bone Joint Surg Am, 2020;102[13]:1169–1176), that assessed the clinical and radiographic outcomes of vertebral body tethering (VBT) in the treatment of adolescent scoliosis. The authors demonstrated successful treatment in 74% of patients, based on radiographic outcomes and avoidance of subsequent posterior spinal fusion. Nearly a quarter of patients required revision surgery. Almost half suffered a broken tether, although the effects of such complications are not fully understood. The study provided valuable information for determining which patients are reasonable candidates for VBT and emphasizes several questions surrounding this novel technology that remain unanswered. This analysis discusses the study’s strengths and weaknesses, suggests potential directions of future research, and examines the potential indications for VBT.

Health(y) education: A critical analysis of the role of public health regulation in and on tertiary education in Aotearoa New Zealand

2021 ◽  
pp. 147821032199501
Author(s):  
Susan Shaw ◽  
Keith Tudor
Keyword(s):  
Public Health ◽  
New Zealand ◽  
Critical Analysis ◽  
Tertiary Education ◽  
Power Dynamics ◽  
Policy And Practice ◽  
Educational Design ◽  
Aotearoa New Zealand ◽  
Public Health Regulation

This article offers a critical analysis of the role of public health regulation on tertiary education in Aotearoa New Zealand and, specifically, the requirements and processes of Responsible Authorities under the Health Practitioners Competence Assurance Act for the accreditation and monitoring of educational institutions and their curricula (degrees, courses of studies, or programmes). It identifies and discusses a number of issues concerned with the requirements of such accreditation and monitoring, including, administrative requirements and costs, structural requirements, and the implications for educational design. Concerns with the processes of these procedures, namely the lack of educational expertise on the part of the Responsible Authorities, and certain manifested power dynamics are also highlighted. Finally, the article draws conclusions for changing policy and practice.

scholarly journals Critical Analysis of the Oversight Role of the Education Portfolio Committee in Parliament of South Africa

2015 ◽  
Vol 3 (3) ◽  
pp. 72 ◽  
Author(s):  
W. W. Manona
Keyword(s):  
South Africa ◽  
Data Collection ◽  
Critical Analysis ◽  
Good Governance ◽  
Government Expenditure ◽  
Adverse Consequence ◽  
Senior Executives ◽  
Effectiveness And Efficiency ◽  
Ruling Party

There is a prevalent assumption in South Africa that Parliament is guided by the ideals of democracy, accountability, transparency and accessibility. However, there are still gaps and challenges as far as theoversight role of Parliament is concerned, despite the presence of committees that have been established to oversee the executive and relevant structures of government, government activities and public finances. There is widespread maladministration and misuse of government expenditure in government departments. This paper investigates the oversight role of parliamentary committees to determine their relative influence on accountability and democracy in the execution of functions by public functionaries. The aim of the paper is to provide an understanding into inherent problems in the oversight role of Parliament in the democratic dispensation in South Africa, which seems not to have been given serious attention in the academia, considering the pivotal role Parliament plays in the lives of citizens of the country. These oversight committees have selectively held Senior Executives or Ministers accountable for their ineffectiveness, misuse of government expenditure and maladministration. This could be attributed to the fact that oversight in South Africa does not seem to be properly understood and implemented as it should be. Moreover, the influence of the majoritarian authority of the ruling party in committees seems to be colluding with the executive. Failure to take action against cases of omission brings questions on the effectiveness and efficiency of the oversight role of Parliament. The adverse consequence is the delay in the provision of good quality services to poor communities. This paper employed the theoretical approach as a method of data collection. Conclusions have been drawn that the shortcomings of the parliamentary committees compromise accountability and good governance in service delivery.

A Critical Analysis of the Actual Role of Minimally Invasive Surgery and Active Surveillance for Kidney Cancer

2010 ◽  
Vol 57 (2) ◽  
pp. 223-232 ◽  
Author(s):  
Roman Heuer ◽  
Inderbir S. Gill ◽  
Giorgio Guazzoni ◽  
Ziya Kirkali ◽  
Michael Marberger ◽  
...  
Keyword(s):  
Minimally Invasive Surgery ◽  
Minimally Invasive ◽  
Kidney Cancer ◽  
Active Surveillance ◽  
Invasive Surgery ◽  
Critical Analysis ◽  
Actual Role
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