Performance Evaluation of the Impact of Hidden Nodes in a Restricted Access Window Using the IEEE 802.11ah Standard

2017 ◽  
Author(s):  
Havifa Putri ◽  
Doan Perdana ◽  
Ridha Negara
Keyword(s):  
Performance Evaluation ◽  
Restricted Access ◽  
Ieee 802.11Ah ◽  
The Impact ◽  
Hidden Nodes

Comprehensive Income: which potential effects on firms' performance evaluation and users' decision process?

2016 ◽  
pp. 55-94
Author(s):  
Pier Luigi Marchini ◽  
Carlotta D'Este
Keyword(s):  
Performance Evaluation ◽  
Decision Process ◽  
Financial Analysts ◽  
Listed Companies ◽  
Financial Statement ◽  
Comprehensive Income ◽  
Other Comprehensive Income ◽  
Gains And Losses ◽  
The Impact

The reporting of comprehensive income is becoming increasingly important. After the introduction of Other Comprehensive Income (OCI) reporting, as required by the 2007 IAS 1-revised, the IASB is currently seeking inputs from investors on the usefulness of unrealized gains and losses and on the role of comprehensive income. This circumstance is of particular relevance in code law countries, as local pre-IFRS accounting models influence financial statement preparers and users. This study aims at investigating the role played by unrealized gains and losses reporting on users' decision process, by examining the impact of OCI on the Italian listed companies RoE ratio and by surveying a sample of financial analysts, also content analysing their formal reports. The results show that the reporting of comprehensive income does not affect the financial statement users' decision process, although it statistically affects Italian listed entities' performance.

scholarly journals Power Hardware-in-the-Loop-Based Performance Analysis of Different Converter Controllers for Fast Active Power Regulation in Low-Inertia Power Systems

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3274
Author(s):  
Jose Rueda Torres ◽  
Zameer Ahmad ◽  
Nidarshan Veera Kumar ◽  
Elyas Rakhshani ◽  
Ebrahim Adabi ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Power Systems ◽  
Real Time ◽  
Control Strategies ◽  
Active Power ◽  
Power Electronic ◽  
Hardware In The Loop ◽  
Digital Controllers ◽  
Power Regulation ◽  
The Impact

Future electrical power systems will be dominated by power electronic converters, which are deployed for the integration of renewable power plants, responsive demand, and different types of storage systems. The stability of such systems will strongly depend on the control strategies attached to the converters. In this context, laboratory-scale setups are becoming the key tools for prototyping and evaluating the performance and robustness of different converter technologies and control strategies. The performance evaluation of control strategies for dynamic frequency support using fast active power regulation (FAPR) requires the urgent development of a suitable power hardware-in-the-loop (PHIL) setup. In this paper, the most prominent emerging types of FAPR are selected and studied: droop-based FAPR, droop derivative-based FAPR, and virtual synchronous power (VSP)-based FAPR. A novel setup for PHIL-based performance evaluation of these strategies is proposed. The setup combines the advanced modeling and simulation functions of a real-time digital simulation platform (RTDS), an external programmable unit to implement the studied FAPR control strategies as digital controllers, and actual hardware. The hardware setup consists of a grid emulator to recreate the dynamic response as seen from the interface bus of the grid side converter of a power electronic-interfaced device (e.g., type-IV wind turbines), and a mockup voltage source converter (VSC, i.e., a device under test (DUT)). The DUT is virtually interfaced to one high-voltage bus of the electromagnetic transient (EMT) representation of a variant of the IEEE 9 bus test system, which has been modified to consider an operating condition with 52% of the total supply provided by wind power generation. The selected and programmed FAPR strategies are applied to the DUT, with the ultimate goal of ascertaining its feasibility and effectiveness with respect to the pure software-based EMT representation performed in real time. Particularly, the time-varying response of the active power injection by each FAPR control strategy and the impact on the instantaneous frequency excursions occurring in the frequency containment periods are analyzed. The performed tests show the degree of improvements on both the rate-of-change-of-frequency (RoCoF) and the maximum frequency excursion (e.g., nadir).

Human Performance Evaluation of a Metaphor Graphic Display for Respiratory Data

1994 ◽  
Vol 33 (04) ◽  
pp. 390-396 ◽  
Author(s):  
J. G. Stewart ◽  
W. G. Cole
Keyword(s):  
Performance Evaluation ◽  
Human Performance ◽  
Pattern Detection ◽  
Data Sets ◽  
Complex Task ◽  
Graphic Display ◽  
Literal Sense ◽  
Single Number ◽  
The Impact ◽  
Human Problem

Abstract:Metaphor graphics are data displays designed to look like corresponding variables in the real world, but in a non-literal sense of “look like”. Evaluation of the impact of these graphics on human problem solving has twice been carried out, but with conflicting results. The present experiment attempted to clarify the discrepancies between these findings by using a complex task in which expert subjects interpreted respiratory data. The metaphor graphic display led to interpretations twice as fast as a tabular (flowsheet) format, suggesting that conflict between earlier studies is due either to differences in training or to differences in goodness of metaphor, Findings to date indicate that metaphor graphics work with complex as well as simple data sets, pattern detection as well as single number reporting tasks, and with expert as well as novice subjects.

scholarly journals Opinions of school principals and teachers about teacher evaluation according to performance criteriaPerformans kriterlerine göre öğretmenlerin değerlendirilmesine ilişkin okul müdürü ve öğretmen görüşleri

2017 ◽  
Vol 14 (2) ◽  
pp. 1647 ◽  
Author(s):  
Ferudun Sezgin ◽  
Ayşe Tınmaz ◽  
Sezgin Tetik
Keyword(s):  
Professional Development ◽  
Performance Evaluation ◽  
Phenomenological Study ◽  
School Principals ◽  
Evaluation Process ◽  
Structured Interview ◽  
Performance Criteria ◽  
Ministry Of Education ◽  
Study Participants ◽  
The Impact

The purpose of this study was to examine the opinions of school principals and teachers about the new implication process which teachers are being evaluated by school principals according to performance criteria. Phenomenological study design was chosen in this qualitative research. Participants were selected according to maximum variation sampling which is one of the purposeful sampling methods. Data were collected from 11 school principals and 14 teachers via semi-structured interview forms in Tokat city center. Data were analyzed according to descriptive analyzing technique. According to the results obtained in the study, participants stated that the purpose of current performance evaluation is the evaluation of teachers and to support their professional development. About the new application’s access to the purposes, while many of the teachers reported that the system could not achieve its goals, most of the school principals stated that the system would reach the goals with some shortcomings. Participants criticized the system for fast coming up and implementation. Participants stated that school principals were not qualified for this system. The most important strength of the system was defined as the teacher’s close awareness of the school principals. According to teachers’ views about the weaknesses of the system; the impact of conflicts or prejudices affecting school, school principals’ failure to take into account the criteria list, the existence of biased behaviors, the fact that principals were not educated in supervision, erroneous or incomplete practices in branch-specific evaluations, the deterioration of organizational peace. The majority of school principals reported that the applied system could contribute to the professional development of teachers, while the majority of teachers thought that the system would make a limited contribution. A two-day seminar was held with the school principals while training for teachers was not arranged by the Ministry of Education prior to the performance evaluation process. In the study, some suggestions were also made regarding the development of the current practice and the assessment of teacher performance in Turkey.Extended English abstract is in the end of PDF (TURKISH) file. ÖzetBu çalışmanın amacı öğretmenlerin performans kriterlerine göre okul müdürleri tarafından değerlendirildiği yeni uygulama konusunda okul müdürleri ve öğretmenlerin görüşlerini ortaya koymaktır. Nitel araştırma yöntemine göre tasarlanan bu çalışmada olgu bilim deseni benimsenmiştir. Çalışmada katılımcılar amaçlı örnekleme yöntemlerinden maksimum çeşitlemeye göre oluşturulmuştur. Tokat il merkezinde görev yapmakta olan 11 okul müdürü ve 14 öğretmenle yarı yapılandırılmış görüşme formu kullanılarak veri toplanmıştır. Veriler betimsel analiz tekniğine göre çözümlenmiştir. Araştırmada elde edilen verilere göre katılımcılar mevcut performans değerlendirme uygulamasının amacının daha çok öğretmenlerin değerlendirilmesi ve mesleki gelişimlerini artırma olduğu yönünde görüş belirtmişlerdir. Yeni uygulamanın amacına ulaşabilmesine ilişkin öğretmenlerin çoğunluğu sistemin amacını gerçekleştiremeyeceğini düşünürken okul müdürlerinin çoğunluğu bazı eksiklikler belirtmekle birlikte sistemin amacına ulaşabileceğini ifade etmektedirler. Uygulanma süreciyle ilgili katılımcılar sistemin bir anda gündeme gelmesi ve uygulanmasını eleştirmektedir. Katılımcılar okul müdürlerinin bu konuda yeterli olmadığını düşünmektedir. Sisteminin en önemli güçlü yanının okul müdürünün öğretmeni yakından tanıması olduğu ifade edilmiştir. Sistemin zayıf yönleri ile ilgili olarak öğretmenler; okulda yaşanacak çatışmaların veya önyargıların değerlendirmeyi etkilemesi, okul müdürlerinin kriter listesini dikkate almaması, taraflı davranışların varlığı, müdürlerin denetim konusunda eğitimli olmamaları, branşa özgü değerlendirmelerde hatalı veya eksik uygulama, örgüt barışının bozulması şeklinde görüş belirtmişlerdir. Okul müdürlerinin çoğunluğu uygulanmakta olan sistemin öğretmenlerin mesleki gelişimine katkı sağlayacağını belirtirken öğretmenlerin çoğunluğu kısıtlı katkı sağlayacağını düşünmektedir. Performans değerlendirme süreci öncesinde Milli Eğitim Bakanlığı tarafından öğretmenlere yönelik bir eğitim düzenlenmezken, okul müdürlerine iki günlük bir seminer düzenlenmiştir. Çalışmada ayrıca mevcut uygulamanın geliştirilmesi ile ilgili ve Türkiye’de genel anlamda öğretmen performansının değerlendirilmesi ile ilgili olarak birtakım önerilerde bulunulmuştur.

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