Spectroscopic Properties of Herbig-Haro Flows

1997 ◽  
Vol 182 ◽  
pp. 47-62 ◽  
Author(s):  
Karl-Heinz Böhm ◽  
Anthony P. Goodson
Keyword(s):  
Ultra Violet ◽  
Spectroscopic Properties ◽  
Plane Shock ◽  
Open Questions ◽  
High Ionization ◽  
Shock Models ◽  
Wide Range ◽  
Hh Objects ◽  
Insight Into

While recent studies of Herbig-Haro (HH) objects have focused less on the details of their spectra than on the hydrodynamics of jets and their working surfaces, many open questions concerning these spectra remain. Attempts to quantitatively explain a wide range of lines for many HH objects point to discrepancies between theory and observation. Some lines (specifically [S II](6716+6731)) are much stronger than predicted by simple plane-shock and bow-shock models, while in general high ionization lines (e.g. lines of [O III], [Ne III] and [S III] in the optical and the [C IV] and [N V] in the ultra-violet) are much weaker than expected, pointing to difficulties with current models. On the other hand, examination of these lines has lent new insight into both the quality of our predictions and the nature of HH outflows. Examination of many Fe lines have demonstrated that our ability to estimate abundances from faint lines is surprisingly good (or surprisingly consistent). Position velocity diagrams have also been constructed (using forbidden emission lines), allowing outflows to be mapped to within 0.″3 arcseconds of the source star.

scholarly journals Opportunities to improve the measurement of audit quality: a call for collaboration between the profession and academics

2016 ◽  
Vol 90 (9) ◽  
pp. 352-351 ◽  
Author(s):  
Jeroen van Raak ◽  
Ulrike Thürheimer
Keyword(s):  
Audit Quality ◽  
Audit Fees ◽  
Class Action ◽  
Financial Statement ◽  
Accrual Quality ◽  
Wide Range ◽  
External Stakeholders ◽  
Insight Into ◽  
Considerable Doubt

Audit research relies on a wide range of publicly available measures to examine which factors influence the quality of financial statement audits. While research to date has to rely largely on remote proxies due to a lack of access to proprietary data, there is considerable doubt about the validity of these proxies and the inferences drawn based on these proxies. In order to provide insight into the reliability of these measures, Rajgopal, Srinivasan & Zheng (2015) investigate whether commonly used proxies for audit quality (i.e. auditor size, abnormal audit fees, accrual quality, and the propensity to meet and beat analyst targets) are associated with deficiencies reported in SEC investigations and class-action lawsuits. Such alleged deficiencies reflect how external stakeholders assess audit performance. Their study indicates that the use of such proxies is highly problematic and that the performance of these measures, with the exception of auditor size, is poor.

scholarly journals Managing Nitrogen, Potassium, and Boron in New Guinea Impatiens: Is More Better?

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 777B-777
Author(s):  
Dharmalingam S. Pitchay* ◽  
Jonathan M. Frantz ◽  
Jonathan M. Locke ◽  
Charles Krause
Keyword(s):  
New Guinea ◽  
Production Costs ◽  
Plant Performance ◽  
Nutrient Deficiencies ◽  
Tissue Samples ◽  
Wide Range ◽  
New Guinea Impatiens ◽  
Reflectance Measurements ◽  
Insight Into

Growers tend to over fertilize their plants as a way to minimize the likelihood of encountering nutrient deficiencies that would reduce the quality of their plants. Much of the nutrition literature focuses on the nutritional extremes namely of toxicity and deficiency. Once plants get to this stage, little can be done to correct the problem. Characteristics of plant performance in super-optimal conditions, yet below toxic levels, is less well known, and needs to be developed to help growers identify problems in their production practices before they impact sales. New Guinea Impatiens were grown over a wide range of N, K, and B levels, from 15% to 400% full strength Hoagland's solution for each nutrient after establishing transplanted rooted cuttings in a peat: perlite soilless media. Plants were grown for four weeks during treatment, during which time the flowers were pinched. After only 2 weeks of treatment, plants with 200% and 400% N were significantly shorter than control plants and plants with 15% N. Reflectance measurements and photographs were made twice a week. At the end of the four weeks, plant tissue was analyzed for form of N, root development and structure, and leaf area. Tissue samples were also analyzed with SEM and energy dispersive X-ray analysis to determine changes in nutrient location and tissue structure. This data provides insight into the nutrition economy of plants in general, tests the use of reflectance spectrometry as a method of detecting super-optimal fertilizer concentrations, and will help growers optimize their fertilization requirements to reduce production costs yet maintain high plant quality.

scholarly journals Management of Malnutrition in Older Patients—Current Approaches, Evidence and Open Questions

2019 ◽  
Vol 8 (7) ◽  
pp. 974 ◽  
Author(s):  
Dorothee Volkert ◽  
Anne Marie Beck ◽  
Tommy Cederholm ◽  
Emanuele Cereda ◽  
Alfonso Cruz-Jentoft ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Older Patients ◽  
Future Research ◽  
Geriatric Syndrome ◽  
Open Questions ◽  
Conflicting Evidence ◽  
Wide Range ◽  
Patient Groups ◽  
Enteral And Parenteral Nutrition

Malnutrition is widespread in older people and represents a major geriatric syndrome with multifactorial etiology and severe consequences for health outcomes and quality of life. The aim of the present paper is to describe current approaches and evidence regarding malnutrition treatment and to highlight relevant knowledge gaps that need to be addressed. Recently published guidelines of the European Society for Clinical Nutrition and Metabolism (ESPEN) provide a summary of the available evidence and highlight the wide range of different measures that can be taken—from the identification and elimination of potential causes to enteral and parenteral nutrition—depending on the patient’s abilities and needs. However, more than half of the recommendations therein are based on expert consensus because of a lack of evidence, and only three are concern patient-centred outcomes. Future research should further clarify the etiology of malnutrition and identify the most relevant causes in order to prevent malnutrition. Based on limited and partly conflicting evidence and the limitations of existing studies, it remains unclear which interventions are most effective in which patient groups, and if specific situations, diseases or etiologies of malnutrition require specific approaches. Patient-relevant outcomes such as functionality and quality of life need more attention, and research methodology should be harmonised to allow for the comparability of studies.

scholarly journals Identifying Consensus and Open Questions around Assessing or Predicting the Quality and Success of Cartilage Repair: A Delphi Study

Surgeries ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 286-302
Author(s):  
Timothy Hopkins ◽  
James Richardson ◽  
Jan Herman Kuiper
Keyword(s):  
Cartilage Repair ◽  
Delphi Study ◽  
Surgical Techniques ◽  
Scoring Systems ◽  
Structural Quality ◽  
Delphi Consensus ◽  
Related Factors ◽  
Open Questions ◽  
Wide Range

A range of surgical techniques have been developed for the repair or regeneration of lesioned cartilage in the human knee and a corresponding array of scoring systems have been created to assess their outcomes. The published literature displays a wide range of opinions regarding the factors that influence the success of surgical cartilage repair and which parameters are the most useful for measuring the quality of the repair at follow-up. Our objective was to provide some clarity to the field by collating items that were agreed upon by a panel of experts to be important in these areas. A modified, three-round Delphi consensus study was carried out consisting of one idea-generating focus-group and two subsequent, self-completed questionnaire rounds. In each round, items were assessed for their importance and level of consensus against pre-determined threshold levels. In total, 31 items reached consensus, including a hierarchy of tissues in the joint based on their importance in cartilage repair, markers of repair cartilage quality and the implications of environmental and patient-related factors. Items were stratified into those that can be employed for predicting the success of cartilage repair and those that could be used for assessing the structural quality of the resulting repair cartilage. Items that did not reach consensus represent areas where dissent remains and could, therefore, be used to guide future clinical and fundamental scientific research.

scholarly journals Dementia, death and advance directives

2012 ◽  
Vol 7 (4) ◽  
pp. 499-506 ◽  
Author(s):  
JONATHAN WOLFF
Keyword(s):  
Quality Of Life ◽  
End Of Life ◽  
Advance Directives ◽  
Health Condition ◽  
End Of Life Decisions ◽  
Wide Range ◽  
Life Decisions ◽  
Insight Into ◽  
At Home

AbstractThis article considers the ethics of advance directives, especially in relation to conditions such as dementia. For some choices, such as over whether one's life should end at home or in a hospice, advance directives can be very enlightened and helpful. For others, such as those to end the life of an autonomous subject, against their will, have no moral appeal and would rightly be ignored. In a wide range of intermediate cases, given our typical lack of insight into how changes in our health condition will affect us in other ways, we should be very cautious indeed in promoting the use of advance directives in end-of-life decisions, at least where a reasonable quality of life remains. There may be some reasons for giving priority to the earlier autonomous self over a later, contented but non-autonomous self, but these reasons seem far from compelling.

scholarly journals Satisfiers and Hygiene Factors: Residents' Perceptions of Strengths and Limitations of Their Learning Environment

2012 ◽  
Vol 4 (1) ◽  
pp. 122-127 ◽  
Author(s):  
Ingrid Philibert
Keyword(s):  
Learning Environment ◽  
Cross Section ◽  
Career Counseling ◽  
New Technology ◽  
Data Set ◽  
Procedural Volume ◽  
Wide Range ◽  
Hygiene Factors ◽  
Insight Into

Abstract Background Efforts are underway to enhance learner input into the accreditation of educational programs, including residencies and fellowships. Objectives To aggregate the perspectives of residents and fellows from a cross-section of specialties to highlight common dimensions in learners' perceptions of strengths and opportunities for improvement (OFIs) in their program and to assess whether the ACGME Resident Survey captures areas important to residents' perceptions of their learning environment. Results The data set included 206 core and 193 subspecialty programs representing a wide range of specialties and subspecialties. Comments on strengths and OFIs addressed most of the items in the Resident Survey, with items not addressed in the survey also not represented in the ACGME requirements. The findings suggest that some program attributes are mentioned only in their absence (hygiene factors), whereas other dimensions (satisfiers), particularly quality and quantity of residents' interactions with faculty, procedural volume, and variety and didactic offerings, are critical to learners' perceptions of the quality of their learning environment. For some strengths, residents indicated their programs exceeded the ACGME standards, and for areas identified as OFIs, comments suggested programs were in compliance, but the residents desired more. Mentioned in this context were opportunities to perform research, access to board preparation courses and career counseling, and availability of new technology, including new patient care modalities. Conclusions The findings allow insight into program attributes important to residents' perceptions of their learning environment. Programs may find the results helpful in suggesting areas for improvement in their learning environment.

scholarly journals Anomalous Self- and World Experiences in Depersonalization Traits: a Qualitative Study

2021 ◽  
Author(s):  
Anna Ciaunica ◽  
Elizabeth Pienkos ◽  
Estelle Nakul ◽  
Luis Madeira ◽  
Harry Farmer
Keyword(s):  
Qualitative Study ◽  
Sense Of Self ◽  
Self Awareness ◽  
Subjective Experiences ◽  
Open Questions ◽  
Wide Range ◽  
The World ◽  
Key Aspects ◽  
Core Features

This paper proposes a qualitative study exploring anomalous self and world-experiences in individuals with high levels of depersonalization traits. Depersonalization (DP) is a condition characterized by distressing feelings of being a detached, neutral and disembodied onlooker of one’s mental and bodily processes or even of reality itself (‘derealization’). Feelings of depersonalization are extremely common in the general population, yet under-acknowledged and under-examined. Our findings indicate the presence of a wide range of anomalous experiences traditionally understood to be core features of depersonalization, such as disembodiment and disrupted self-awareness. However, our results also indicate experiential features that are less highlighted in previous work, such as faster time perception and blurriness of the self/other boundaries which may play a key role in altering one’s sense of self and sense of presence in the world. Our qualitative study provides an in-depth examination of self-reported disturbances of one’s relatedness to one’s self and the world, thereby shedding further light on the nature of altered subjective experiences in DP. In doing so, this paper draws attention to key aspects yet overlooked that may prove valuable for potential diagnosis and therapy. We conclude by highlighting limitations of this study and a number of open questions that further work needs to address in the future, in order to better understand this condition and to improve the quality of life of those experiencing depersonalization.

Sentence-Based Experience Logging in New Hearing Aid Users

2020 ◽  
Vol 29 (3S) ◽  
pp. 631-637
Author(s):  
Katja Lund ◽  
Rodrigo Ordoñez ◽  
Jens Bo Nielsen ◽  
Dorte Hammershøi
Keyword(s):  
Hearing Aid ◽  
Patient Experiences ◽  
Online Tool ◽  
Rehabilitation Process ◽  
Hearing Rehabilitation ◽  
Clinical Observations ◽  
Hearing Aid Use ◽  
Wide Range ◽  
Insight Into ◽  
Shed Light

Purpose The aim of this study was to develop a tool to gain insight into the daily experiences of new hearing aid users and to shed light on aspects of aided performance that may not be unveiled through standard questionnaires. Method The tool is developed based on clinical observations, patient experiences, expert involvement, and existing validated hearing rehabilitation questionnaires. Results An online tool for collecting data related to hearing aid use was developed. The tool is based on 453 prefabricated sentences representing experiences within 13 categories related to hearing aid use. Conclusions The tool has the potential to reflect a wide range of individual experiences with hearing aid use, including auditory and nonauditory aspects. These experiences may hold important knowledge for both the patient and the professional in the hearing rehabilitation process.

COMBINATORIAL POLYNOMIALLY COMPUTABLE CHARACTERISTICS OF SUBSTITUTIONS AND THEIR PROPERTIES

2020 ◽  
Vol 7 (2) ◽  
pp. 34-41
Author(s):  
VLADIMIR NIKONOV ◽  
◽  
ANTON ZOBOV ◽  
Keyword(s):  
Mathematical Expectation ◽  
Point Of View ◽  
Small Range ◽  
Computational Point ◽  
Wide Range ◽  
Bijective Function ◽  
The Difference ◽  
Element Base ◽  
Selection Of

The construction and selection of a suitable bijective function, that is, substitution, is now becoming an important applied task, particularly for building block encryption systems. Many articles have suggested using different approaches to determining the quality of substitution, but most of them are highly computationally complex. The solution of this problem will significantly expand the range of methods for constructing and analyzing scheme in information protection systems. The purpose of research is to find easily measurable characteristics of substitutions, allowing to evaluate their quality, and also measures of the proximity of a particular substitutions to a random one, or its distance from it. For this purpose, several characteristics were proposed in this work: difference and polynomial, and their mathematical expectation was found, as well as variance for the difference characteristic. This allows us to make a conclusion about its quality by comparing the result of calculating the characteristic for a particular substitution with the calculated mathematical expectation. From a computational point of view, the thesises of the article are of exceptional interest due to the simplicity of the algorithm for quantifying the quality of bijective function substitutions. By its nature, the operation of calculating the difference characteristic carries out a simple summation of integer terms in a fixed and small range. Such an operation, both in the modern and in the prospective element base, is embedded in the logic of a wide range of functional elements, especially when implementing computational actions in the optical range, or on other carriers related to the field of nanotechnology.

A reflection of the polyethnic phenomenon in the Slovak novel of the 21 st century

2019 ◽  
pp. 462-471
Author(s):  
Lyudmila Shirokova
Keyword(s):  
Interpersonal Relations ◽  
Slovak Republic ◽  
Main Character ◽  
Jewish Family ◽  
Wide Range ◽  
Provincial Society ◽  
A Chain ◽  
Middle Generation ◽  
Artistic Quality

The historical polyethnicity of the Slovak society and the connected problems of the interrelations of cultures, ethics, interpersonal relations, are reflected in the works of modern Slovak prose. They are represented most clearly in the novels of middle generation writers P. Rankov, S. Lavrík, P. Krištúfek. They dwell upon the dramatical events of the 20 th century. They cover wide range problems, from the fruitful coexistence of various ethnic groups and their representatives to national contradictions and racial repressions. The artistic quality of the mentioned works, their composition, the way of narrating, the type of the main character, can be highly evaluated. For example, in a novel by P. Rankov the plot, in spite of its linearity, is a chain of episodes in the span of 30 years from the life of the main characters. It reflects not only their fates, but also the historical and political changes of the world they live in. The main female character of a S. Lavrík ’s novel narrates about everyday life and tragedies in the lives of the dwellers of a Slovak town in the Slovak Republic during the war. P. Krištúfek in his novel focuses on several decades from the life of a Slovak-Jewish family and dwellers of a Slovak provincial society with types and relations specific for this milieu.

Sign in / Sign up

Export Citation Format

Share Document