scholarly journals Production of good quality holograms by the THz pulsed vortex beams

2021 ◽  
Author(s):  
Halima Benzehoua ◽  
Latifa Dalil-Essakali ◽  
Abdelmajid Belafhal
Keyword(s):  
Modulation Depth ◽  
Vital Role ◽  
Gaussian Beams ◽  
Frequency Detuning ◽  
Single Cycle ◽  
Small Frequency ◽  
Fringe Contrast ◽  
Engineering Studies ◽  
Vortex Beams

Abstract In this paper, we discuss the quality of holograms based on the calculation of the modulation depth. It’s shown that the terahertz (THz) pulsed vortex beams play a vital role in holography filed, where two lasers with frequency difference have used. The THz vortex beams give new regions of larger frequency detuning and an important value of the modulation depth and fringe contrast (MDFC ratio) for obtaining the best holograms contrary to the Gaussian beams for which the best holograms are realized for small frequency detuning. The particular cases such as, Gaussian beam and single cycle pulses are deduced from our result. Numerical simulations are also presented to study the dependence of the MDFC ratio on the frequency detuning for THz vortex beams and Gaussian beams. This research could be beneficial in holographic interferometry, and it will firmly establish as a tool for scientific and engineering studies.

scholarly journals Analysis of the modulation depth of some femtosecond laser pulses in holographic interferometry

2021 ◽  
Author(s):  
Halima Benzehoua ◽  
Latifa Dalil-Essakali ◽  
Abdelmajid Belafhal
Keyword(s):  
Femtosecond Laser ◽  
Holographic Interferometry ◽  
Modulation Depth ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Gaussian Beams ◽  
Frequency Detuning ◽  
Fringe Contrast ◽  
Temporal Profiles

Abstract On the basis of the modulation depth in the interference and holographic processes, we discuss in this paper the quality of holograms generated by some femtosecond laser pulses of two different colors. The modulation depth in terms of the fringe contrast (MDFC ratio) of Higher-order sh- and ch-Gaussian temporal profiles (shnGTP and chnGTP) are investigated in detail. It’s shown that, when we use two lasers having a very large frequency detuning, the shnGTP exhibit more precise results than the Gaussian beams for holography. shnGTP give new areas of frequency detuning to realize the very significant value of the MDFC ratio for obtaining better holograms, which is impossible with Gaussian beams. It also permits flexibility in the variable frequency difference and pulse duration for good quality holograms, and in the case of the chnGTP, null regions develop and frequency bands are observed favoring the formation of the holograms. The numerical simulations are presented to illustrate and discuss the influence of the frequency detuning, the beam order and the controller parameter of the waves on the modulation depths. The propose theory will be a good basis for the development of some new experiments on the holographic interferometry and it will certainly be very useful for the specialists of the studied femtosecond laser pulses.

Cytoprotective Agents to Avoid Chemotherapy Induced Sideeffects on Normal Cells: A Review

2019 ◽  
Vol 19 (10) ◽  
pp. 765-781
Author(s):  
Seema Rohilla ◽  
Harish Dureja ◽  
Vinay Chawla
Keyword(s):  
Adverse Effects ◽  
Anticancer Agents ◽  
Therapeutic Index ◽  
Chemotherapeutic Agents ◽  
Vital Role ◽  
Normal Cells ◽  
Normal Tissues ◽  
Organ Specific ◽  
Delay In Treatment

Anticancer agents play a vital role in the cure of patients suffering from malignancy. Though, the chemotherapeutic agents are associated with various adverse effects which produce significant toxic symptoms in the patients. But this therapy affects both the malignant and normal cells and leads to constricted therapeutic index of antimalignant drugs which adversely impacts the quality of patients’ life. Due to these adversities, sufficient dose of drug is not delivered to patients leading to delay in treatment or improper treatment. Chemoprotective agents have been developed either to minimize or to mitigate the toxicity allied with chemotherapeutic agents. Without any concession in the therapeutic efficacy of anticancer drugs, they provide organ specific guard to normal tissues.

Phamacognostical and Pharmaceutical Evaluation of Chandrashakaladi Vataka - A herbal formulation

2016 ◽  
Vol 1 (3) ◽  
Author(s):  
Dr. Akash S Changole ◽  
Mandip Goyal ◽  
Harish CR
Keyword(s):  
Classical Method ◽  
Raw Materials ◽  
Herbal Medicines ◽  
Vital Role ◽  
Published Data ◽  
Herbal Formulation ◽  
Physico Chemical ◽  
Good Manufacturing Practices ◽  
Solvent Systems

Background: Quality control and the standardization of herbal medicines involve steps like standard source and quality of raw materials, good manufacturing practices and adequate analytical screening. These practices play a vital role in guaranting the quality and stability of herbal preparations. Chandrashakaladi Vataka is an Ayurvedic herbal formulation mentioned to be beneficial in Kushtha. Till date no published data is available on its analytical profile. Aim: To develop the Pharmacognostical and Phyto-chemical profile of Chandrashakaladi Vataka. Material and Methods: Chandrashakaladi Vataka was prepared as per classical method and analytical findings were recorded. Samples were subjected to organoleptic analysis, physico-chemical analysis and HPTLC examination by optimizing the solvent systems. Results and Conclusions: Pharmacognostical profile of Chandrashakaladi Vataka was established. Loss on drying, Ash value, Acid insoluble extract, Methanol soluble extract, Chandrashakaladi Vataka was found within prescribed limits. HPTLC profile of Chandrashakaladi Vataka revealed 12 spots at 254 nm and 13 spots at 366 nm.

scholarly journals A Systematic Review of Healthcare Professionals’ Knowledge, Self-Efficacy and Attitudes Towards Working with Autistic People

2021 ◽  
Author(s):  
Kirsten Corden ◽  
Rebecca Brewer ◽  
Eilidh Cage
Keyword(s):  
Health Professionals ◽  
Self Efficacy ◽  
Healthcare Professionals ◽  
Assessment Tool ◽  
Vital Role ◽  
Narrative Synthesis ◽  
Quality Assessment Tool ◽  
Professional Background ◽  
Autistic People

AbstractHealthcare professionals play a vital role in identifying and supporting autistic people. This study systematically reviewed empirical research examining healthcare professionals’ knowledge, self-efficacy and attitudes towards working with autistic people. Thirty-five studies were included. The included studies sampled a range of countries and professional backgrounds. A modified quality assessment tool found the quality of the included studies was moderately good. Narrative synthesis indicated that healthcare professionals report only moderate levels of autism knowledge and self-efficacy, and often lack training. Variation within and between countries and professional background was not explained by demographic factors. The reviewed evidence suggests health professionals’ limited knowledge and self-efficacy in working with autistic people is a challenge to the provision of healthcare for autistic individuals.

Revisiting competences of adult learning facilitators: Perspectives from the Mongolian context

2021 ◽  
pp. 147797142110031
Author(s):  
Togtokhmaa Zagir ◽  
Helga Dorner
Keyword(s):  
Professional Development ◽  
Adult Learners ◽  
Adult Learning ◽  
Needs Assessment ◽  
Vital Role ◽  
International Studies ◽  
Teaching Role ◽  
Core Competences ◽  
Key Stakeholders

Competent adult learning facilitators play a vital role in improving the quality of adult learning programmes. This article thus explores common and core competences of adult learning facilitators from the perspective of key stakeholders, such as facilitators, adult learners and administrators. By synthesising previous international studies, we developed a survey and collected data in Mongolia ( n = 227). We identified adult learning facilitators’ common and core competences focusing on their teaching role. As found, areas of adult learners’ needs assessment, communication and motivation should be integrated in professional development programmes in order to aim for a better completion rate and higher participation of target audiences in adult learning programmes.

scholarly journals Sleep Deficiency and Deprivation Leading to Cardiovascular Disease

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Michelle Kohansieh ◽  
Amgad N. Makaryus
Keyword(s):  
Risk Factors ◽  
Cardiovascular Disease ◽  
Well Being ◽  
Underlying Mechanism ◽  
Vital Role ◽  
Quality Of Sleep ◽  
Cvd Risk Factors ◽  
Cvd Risk ◽  
Sleep Deficiency

Sleep plays a vital role in an individual’s mental, emotional, and physiological well-being. Not only does sleep deficiency lead to neurological and psychological disorders, but also the literature has explored the adverse effects of sleep deficiency on the cardiovascular system. Decreased quantity and quality of sleep have been linked to cardiovascular disease (CVD) risk factors, such as hypertension, obesity, diabetes, and dyslipidemia. We explore the literature correlating primary sleep deficiency and deprivation as a cause for cardiovascular disease and cite endothelial dysfunction as a common underlying mechanism.

Clarifying Institutional and Organizational Conditions Promoting Principals' Quality Leadership and Reform Design for Japan

Impact ◽  
2021 ◽  
Vol 2021 (7) ◽  
pp. 15-17
Author(s):  
Hirofumi Hamada
Keyword(s):  
Education Reform ◽  
Developed Countries ◽  
Vital Role ◽  
Quality Of Education ◽  
Organizational Conditions ◽  
Problem Situations ◽  
Distributed Approach ◽  
Area Of Interest ◽  
High Level

Education reform helps ensure that the education in a given country is of the highest possible quality and is a key area of focus for many developed countries. Japan's education system rates highly and the evolution of education reform is key to ensuring this high level is sustained. School principals play a key role in delivering high-quality education and, indeed, a school principal's leadership correlates with the quality of education available. This is an area of interest for Professor Hirofumi Hamada, School Management Laboratory in the Faculty of Human Sciences, University of Tsukuba, Japan, who is currently exploring the institutional and organisational conditions that affect the leadership of principals. The goal of this research is to help shape education reform in Japan. Hamada believes it is necessary to create an environment of independent and collaborative learning and to value the individuality of children. In addition, problem situations among children are diverse and complex and how schools respond influences the quality of education. Given that the principal is in charge of how a school is run, they play a vital role in assuring the quality of education. Key to Hamada's work is the idea that principals can share their knowledge and leadership with teachers and this creates an environment of shared leadership. He believes that empowering teachers and encouraging them to take on leadership duties is essential. He is working to inform educators that schools require the leadership of principals and for principals to promote a distributed approach to leadership.

Organisation of running events – reducing exclusions and improving the quality of life

2021 ◽  
Vol 67 (3) ◽  
pp. 95-109
Author(s):  
Jacek Łuczak ◽  
Keyword(s):  
Quality Of Life ◽  
Risk Factors ◽  
Risk Estimation ◽  
Vital Role ◽  
Sporting Events ◽  
Estimation Risk ◽  
Technical Problems ◽  
Self Confidence ◽  
Social Nature

Physical activity is a basic factor of human development – it brings satisfaction, vitality, energy, has a therapeutic dimension and affects the quality of life. Among the large group of amateur athletes, there are people vulnerable to social exclusions related to disabilities, psychological dysfunctions, sex and social status. For these people sport is a cure for loneliness and lack of self-confidence, as well as it positively affects their motivation to overcome barriers, which is reflected in other spheres of their lives. One sport that in particular integrates different social groups is running, as confirmed by the growing number of amateur runners, training activities dedicated to them and running events organised for them. However, it is important that organisers of such events ensure the safety of participants and take care of their satisfaction and comfort by holistic planning of all organisational activities. The study hypothesised that factors concerning the safety, comfort and satisfaction of participants play a vital role in organising running events. The aim of the article was to identify and assess the risk of organising running competitions for amateurs in the context of ensuring safety and satisfaction for all participants of the event. In particular, the author noted the risk factors of a social nature, conducive to integration, associated with countering exclusions. The paper presents test results for national competitions involving 21 and 42 km runs. The identification of risk factors was performed by 10 experts (the Delphi method) and 27 representatives of 7 running events organised in Poland (2017–2018) (risk estimate, a questionnaire) took part in the risk estimation. Risk estimation was carried out on the basis of average (effect and probability). The results of the study provide unequivocal information about the spheres of organising sporting events which in the highest degree can affect the safety and comfort of their participants and the perception of the competition itself. Among the key risks there were: inadequate financial and organisational resources, route capacity, or technical problems. Moreover, the paper includes an attempt to discuss results of other research.

Reviewer Acknowledgments

2012 ◽  
Vol 47 (1) ◽  
pp. 67-68
Keyword(s):  
Acute Care ◽  
Hospital Pharmacy ◽  
Vital Role ◽  
Peer Reviewers

The peer reviewers for Hospital Pharmacy serve a vital role in contributing to the field of acute care pharmacy. These reviewers have been central to the quality of the published literature. We thank those who have volunteered their time and expertise in 2011 to read and critique submissions to this journal.

scholarly journals A new Plasmodium vivax reference sequence with improved assembly of the subtelomeres reveals an abundance of pir genes

2016 ◽  
Vol 1 ◽  
pp. 4 ◽  
Author(s):  
Sarah Auburn ◽  
Ulrike Böhme ◽  
Sascha Steinbiss ◽  
Hidayat Trimarsanto ◽  
Jessica Hostetler ◽  
...  
Keyword(s):  
South America ◽  
Plasmodium Vivax ◽  
Sequence Data ◽  
Ex Vivo ◽  
Vital Role ◽  
Asia Pacific ◽  
Reference Sequence ◽  
Manual Curation ◽  
Illumina Sequence

Plasmodium vivax is now the predominant cause of malaria in the Asia-Pacific, South America and Horn of Africa. Laboratory studies of this species are constrained by the inability to maintain the parasite in continuous ex vivo culture, but genomic approaches provide an alternative and complementary avenue to investigate the parasite’s biology and epidemiology. To date, molecular studies of P. vivax have relied on the Salvador-I reference genome sequence, derived from a monkey-adapted strain from South America. However, the Salvador-I reference remains highly fragmented with over 2500 unassembled scaffolds.  Using high-depth Illumina sequence data, we assembled and annotated a new reference sequence, PvP01, sourced directly from a patient from Papua Indonesia. Draft assemblies of isolates from China (PvC01) and Thailand (PvT01) were also prepared for comparative purposes. The quality of the PvP01 assembly is improved greatly over Salvador-I, with fragmentation reduced to 226 scaffolds. Detailed manual curation has ensured highly comprehensive annotation, with functions attributed to 58% core genes in PvP01 versus 38% in Salvador-I. The assemblies of PvP01, PvC01 and PvT01 are larger than that of Salvador-I (28-30 versus 27 Mb), owing to improved assembly of the subtelomeres.  An extensive repertoire of over 1200 Plasmodium interspersed repeat (pir) genes were identified in PvP01 compared to 346 in Salvador-I, suggesting a vital role in parasite survival or development. The manually curated PvP01 reference and PvC01 and PvT01 draft assemblies are important new resources to study vivax malaria. PvP01 is maintained at GeneDB and ongoing curation will ensure continual improvements in assembly and annotation quality.

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