Search results for " testing"

Decagram-Scale Synthesis of Multicolor Carbon Nanodots: Self-Tracking Nanoheaters with Inherent and Selective Anticancer Properties

2022

Carbon nanodots (CDs) are a new class of carbon-based nanoparticles endowed with photoluminescence, high specific surface area, and good photothermal conversion, which have spearheaded many breakthroughs in medicine, especially in drug delivery and cancer theranostics. However, the tight control of their structural, optical, and biological properties and the synthesis scale-up have been very difficult so far. Here, we report for the first time an efficient protocol for the one-step synthesis of decagram-scale quantities of N,S-doped CDs with a narrow size distribution, along with a single nanostructure multicolor emission, high near-infrared (NIR) photothermal conversion efficiency, and sel…

Testing explosive bubbles with time-varying volatility: the case of Spanish public debt

2023

In this paper the dynamics of the Spanish public debt-GDP ratio is analysed during the period 1850–2021. We use recent procedures to test for explosive bubbles in the presence under time- varying volatility (Harvey et al., 2016; Harvey et al., 2019, 2020; Kurozumi et al., 2022) in order to test the explosive behavior of Spanish public debt over this long period. We extend previous analysis of Esteve and Prats (2022) where assume constant unconditional volatility in the underlying error process.

Impact of Gamma Radiation on Dynamic R

2019

GaN high-electron-mobility transistors (HEMTs) are promising next-generation devices in the power electronics field which can coexist with silicon semiconductors, mainly in some radiation-intensive environments, such as power space converters, where high frequencies and voltages are also needed. Its wide band gap (WBG), large breakdown electric field, and thermal stability improve actual silicon performances. However, at the moment, GaN HEMT technology suffers from some reliability issues, one of the more relevant of which is the dynamic on-state resistance (RON_dyn) regarding power switching converter applications. In this study, we focused on the drain-to-source on-resistance (RDSON) char…

Usability aspects of Network Element Management Unit

2004

International Assessment Surveys of Educational Achievement in Developing Countries : Why Education Economists Should Care

2015

International audience; This paper reviews the most known international assessment studies that are conducted in the context of poor countries and highlights the lack of empirical evidence on the degree to which the contents of the tests really match countries' curricula. To illustrate, the paper evaluates the sensitivity of an international testing instrument by comparing the responses of students in two consecutive grades on the same battery of tests. Using propensity score matching to control for student and teacher characteristics, the results show that the tests are not grade sensitive, which raises the question of the validity of many empirical works that are based on similar instrume…

Comparison of inter-trial recovery times for the determination of critical power and W' in cycling

2017

Critical Power (CP) and W’ are often determined using multi-day testing protocols. To investigate this cumbersome testing method, the purpose of this study was to compare the differences between the conventional use of a 24-h inter-trial recovery time with those of 3 h and 30 min for the determination of CP and W’. Methods: 9 moderately trained cyclists performed an incremental test to exhaustion to establish the power output associated with the maximum oxygen uptake (p V O2max), and 3 protocols requiring time-to-exhaustion trials at a constant work-rate performed at 80%, 100% and 105% of p VO2max. Design: Protocol A utilised 24-h inter-trial recovery (CP24/W’24), protocol B utilised 3-h in…

Psychometric testing of the Norwegian version of the questionnaire Family Satisfaction in the Intensive Care Unit (FS-ICU-24)

2018

Bjørg Dale,1 Gro Frivold2 1Centre for Caring Research, Southern Norway, University of Agder, Faculty of Health and Sport Sciences, Grimstad, Norway; 2University of Agder, Faculty of Health and Sport Sciences, Grimstad, Norway Introduction: The questionnaire, Family Satisfaction in the Intensive Care Unit (FS-ICU-24), was developed to assess relatives’ satisfaction with care and involvement in decision-making processes when a close family member stays in the ICU Aim: This study was aimed at describing the translation and exploring the psychometric properties of the Norwegian version of the questionnaire. Methods: The study design was a cross-sectional survey. After trans…

Assessment of Burden Among Family Caregivers of Schizophrenia: Psychometric Testing for Short-Form Zarit Burden Interviews

2018

Objective: Although various short forms of Zarit Burden Interview (ZBI) have been developed, there is a lack of standard psychometric testing and comparison among them. The study aims to examine the psychometric properties of ten short versions of the most frequently used ZBI among a sample of schizophrenia caregivers and to find the one with the best performance.Methods: Cross-sectional door-to-door survey of ZBI-22 and a series of validated instrument data from 327 family caregivers of schizophrenia patients in a Chinese rural community were conducted from October 2015 to January 2016. Reliability was assessed using McDonald's omega coefficient (ω). Validity including concurrent validity,…

Cultural Adaptation of the Modified Version of the Conflicts Tactics Scale (M-CTS) in Mexican Adolescents

2019

Several scales are used in Dating Violence studies assuming cross-cultural invariance and equivalence of the measures without making the proper validation in the intended populations. This study focuses on the importance of adapting existing dating violence psychological instruments (as the widely recognized Modified Version of the Conflict Tactics Scale, M-CTS) in diverse adolescent populations adjusting to international validation procedures that ensure the cultural fit of the instrument and the measurement invariance of the construct. We sought to adapt the M-CTS in Mexican adolescents (N = 1861; 57.5% woman) following the ITC Guidelines for Translating and Adapting Test. We made an anal…

Oracle PL/SQL vienībtestēšana

2016

Galvenais darba mērķis ir izpētīt pieejamo informāciju par Oracle PL/SQL vienībtestēšanas rīkiem, tehniskajiem ierobežojumiem, kā arī izstrādāt ieteikumus par to, kā izvēlēties pareizāko vienībtestēšanas rīku atkarībā no situācijas un kāpēc darīt tieši tā. Lai izstrādātu minētos ieteikumus, nepieciešams analizēt pieejamo informāciju un salīdzināt rīku iespējas. Darbā ir detalizēti apskatīti un savā starpā salīdzināti 4 visbiežāk pielietotie Oracle PL/SQL vienībtestēšanas rīki. Darba rezultāts ir izveidoti ieteikumi Oracle PL/SQL vienībtestēšanas rīka vai ietvara izvēlē, ieviešanā un lietošanā atkarībā no dažādiem faktoriem.