scholarly journals Some Factors Affecting the Accuracy of Stellar Photometry with CCDs (And some ways of dealing with them)

1989 ◽  
Vol 8 ◽  
pp. 635-644 ◽  
Author(s):  
Peter B. Stetson
Keyword(s):  
Point Of View ◽  
Standard System ◽  
Ccd Photometry ◽  
Air Mass ◽  
Factors Affecting ◽  
Stellar Photometry ◽  
Opening And Closing ◽  
Better Than

AbstractThere are many factors which make it difficult to relate instrumental CCD photometry to a fundamental standard system with an accuracy much better than about 1%. Here I will address only three of them: (1) infrared leaks in the filters; (2) the finite opening and closing times of mechanical shutters; and (3) changes in the air mass for long integrations. I will be approaching these subjects from the point of view of a visiting astronomer at someone else’s observatory, who gets three or four nights of observing time a year, and has only the afternoons preceding those nights to perform whatever tests can be carried out while the equipment sits on the telescope.

Sanitation Practices and Policies in India: Exploring Determinants and their Interlinkages

2016 ◽  
Vol 5 (6) ◽  
pp. 197-204
Author(s):  
Binay Kumar Pathak ◽  
Aishna Sharma ◽  
Saumen Chattopadhyay
Keyword(s):  
Critical Evaluation ◽  
Point Of View ◽  
Open Defecation ◽  
Factors Affecting ◽  
Poor Countries ◽  
Secondary Sources ◽  
Hygiene Practices ◽  
The World ◽  
Better Than

India, one of the emerging economies of the world, is plagued with preva-lence of inadequate and poor sanitation facilities. Unhealthy hygiene practices and menace of open defecation still persist in the country which seeks to be counted as one of the superpowers. While some of the poor countries of the world fare better than India in terms of sanitation, it becomes essential to look beyond economic factors to understand the problem. The problems are manifold and appear in many dimensions. While sixty percent of popula-tion does not have access to toilet facilities, the instances of non-utilisation of existing toilet facilities are also reported. The non-utilisation of existing toilet facilities may range from planning related concerns to attitudinal issues. The planning or policy related concerns stem from problems related to maintenance of toilets, lack of plumbing and drainage facilities, lack of water and sewage systems etc. To understand these problems and the efforts to address them, critical evaluation of sanitation policies is needed. Sanitation policies and perceptions of masses towards sanitation practices can be complementary factors for cost of access to sanitation facilities. This paper seeks to look into the factors affecting inadequate sanitation facilities from a broader point of view focussing on policy and practices. The paper utilises secondary sources and a case study to unravel the factors and their interlinkages.

WISATA BAHARI PADA ZONA PEMANFAATAN TAMAN NASIONAL MANUSELA: POTENSI DAN FAKTOR PENGARUH PENGEMBANGAN

2018 ◽  
Vol 2 (2) ◽  
pp. 66-73
Author(s):  
Ivonne R. G. Kaya ◽  
Fildo De Lima
Keyword(s):  
National Park ◽  
Point Of View ◽  
Structured Interviews ◽  
Factors Affecting ◽  
Tourist Attractions ◽  
Income Sources ◽  
Economic Progress ◽  
Key Driver ◽  
Tourism Attractions ◽  
Depth Interviews

Tourism has become one of the major players in ‎international commerce and represents one of the main income ‎sources for many developing countries at the same time. These dynamics have turned tourism into a key driver for socio-‎economic progress.‎ This article described the potential of tourism attraction and factor affecting the development of marine tourism area in the utilization zone of Manusela National Park. Semi-structured interviews, in-depth interviews and participant observations were conducted with respondent (n=110) in Bellarizky, Air Belanda, Ora Beach and Lizar Bahari resort. The potential of tourist attractions in the utilization zone of Manusela National Park is as a snorkeling, diving and point of view. Factors affecting the development are service, transportation, supporting facilities and tourism attractions.

scholarly journals SURG-22. CUSHING’S DISEASE: A DIFFICULT TO TREAT NEURO-ONCOLOGICAL CONDITION

2019 ◽  
Vol 21 (Supplement_6) ◽  
pp. vi244-vi244
Author(s):  
Santanu Bora ◽  
Ashish Suri
Keyword(s):  
Cortisol Level ◽  
Remission Rate ◽  
Univariate Analysis ◽  
Clinical Manifestations ◽  
Plasma Cortisol Level ◽  
Cushing Disease ◽  
Factors Affecting ◽  
Microscopic Surgery ◽  
Acth Secreting ◽  
Better Than

Abstract BACKGROUND Cushing disease (CD) comprises a spectrum of clinical manifestations secondary to hypercortisolism due to ACTH-secreting pituitary adenoma. Transsphenoidal adenomectomy remains the standard treatment. Because of the significant rate of recurrence or persistence of CD, it is of interest to determine factors that may correlate with long-term outcomes following surgical intervention. OBJECTIVE The objective of our study is to determine the remission rate after surgery with special emphasis on factors affecting remission. METHODS Data of all patients undergoing surgery for CD from 2009 to 2017 was analyzed retrospectively. Transphenoidal resection was the preferred treatment with a recent trend in favor of endonasal endoscopic skull base approach. Post-operative cortisol level of < 2 μg/dL was taken as remission and value between 2 and 5 μg/dL as possible remission. RESULTS 104 patients operated primarily for CD were included for analysis. 47 patients underwent microscopic surgery, 55 endoscopic surgery and two were operated trans-cranially. Remission was achieved in 76.47% of patients. In univariate analysis, factors significantly associated with remission were (1) type of surgery (p=0.01); endoscopy (88.23% remission) better than microscopy (56.6% remission) (2) postoperative day-1 morning cortisol (p=0.004) and; (3) postoperative day-1 morning ACTH (p=0.015). In multivariate analysis, however only postoperative day-1 cortisol was found to be significant as predictor of remission (p=0.02). CONCLUSION Postoperative plasma cortisol level is a strong independent predictor of remission and value less than 10.7µgm/dl can be taken as cut off for predicting remission. Remission provided by endoscopy appears to be significantly better than microscopic approach.

ENHANCEMENT OF SCREEN FILM MAMMOGRAM UP TO A LEVEL OF DIGITAL MAMMOGRAM: EXPERIMENTAL ANALYSIS

2013 ◽  
Vol 13 (02) ◽  
pp. 1340004
Author(s):  
APARNA NARENDRA BHALE ◽  
MANISH RATNAKAR JOSHI
Keyword(s):  
Experimental Analysis ◽  
Breast Imaging ◽  
Point Of View ◽  
Quality Analysis ◽  
Digital Mammogram ◽  
Total Recovery ◽  
Clinical Observations ◽  
Opinion Score ◽  
Better Than

Breast cancer is one of the major causes of death among women. If a cancer can be detected early, the options of treatment and the chances of total recovery will increase. From a woman's point of view, the procedure practiced (compression of breasts to record an image) to obtain a digital mammogram (DM) is exactly the same that is used to obtain a screen film mammogram (SFM). The quality of DM is undoubtedly better than SFM. However, obtaining DM is costlier and very few institutions can afford DM machines. According to the National Cancer Institute 92% of breast imaging centers in India do not have digital mammography machines and they depend on the conventional SFM. Hence in this context, one should answer "Can SFM be enhanced up to a level of DM?" In this paper, we discuss our experimental analysis in this regard. We applied elementary image enhancement techniques to obtain enhanced SFM. We performed the quality analysis of DM and enhanced SFM using standard metrics like PSNR and RMSE on more than 350 mammograms. We also used mean opinion score (MOS) analysis to evaluate enhanced SFMs. The results showed that the clarity of processed SFM is as good as DM. Furthermore, we analyzed the extent of radiation exposed during SFM and DM. We presented our literally findings and clinical observations.

PORTFOLIO ANALYSIS IN THE DEVELOPMENT OF CORPORATE STRATEGY

2021 ◽  
Vol 2 (10) ◽  
pp. 13-20
Author(s):  
Ekaterina A. Egorova ◽  
◽  
Polina V. Syrovatkina ◽  
Tatiana F. Chernova ◽  
Irina S. Brikoshina ◽  
...  
Keyword(s):  
Strategic Management ◽  
Corporate Strategy ◽  
Portfolio Analysis ◽  
Point Of View ◽  
Factors Affecting ◽  
Number Of Factors ◽  
Market Situation

This article reveals the specifics of developing a corporate strategy using portfolio analysis, taking into account the current market situation, which has created a number of factors affecting labor produc-tivity, internal and external policies of organizations, using the example of the work of the "Vishnevii sad" theater. The information about portfolio analysis in the development of corporate strategy is presented from the point of view of strategic management. Both theoretical and practical data are given, including different ways of constructing portfolio analysis, rules and methods that can be implemented. Proposals for modifica-tion and improvement of internal processes taking into account the influence of extraneous factors, possible goals and results are presented.

scholarly journals Hydrological Validation of a Radar-Based Nowcasting Technique

2005 ◽  
Vol 6 (4) ◽  
pp. 532-549 ◽  
Author(s):  
Marc Berenguer ◽  
Carles Corral ◽  
Rafael Sánchez-Diezma ◽  
Daniel Sempere-Torres
Keyword(s):  
Point Of View ◽  
Motion Field ◽  
Warning Systems ◽  
Rainfall Runoff ◽  
Weather Radars ◽  
Radar Echoes ◽  
Radar Measurements ◽  
Rainfall Runoff Model ◽  
Runoff Model ◽  
Better Than

Abstract Nowcasting precipitation is a key element in the anticipation of floods in warning systems. In this framework, weather radars are very useful because of the high resolution of their measurements both in time and space. The aim of this study is to assess the performance of a recently proposed nowcasting technique (S-PROG) from a hydrological point of view in a Mediterranean environment. S-PROG is based on the advection of weather radar fields according to the motion field derived with an algorithm based on tracking radar echoes by correlation (TREC), and it has the ability of filtering out the most unpredictable scales of these fields as the forecasting time increases. Validation of this nowcasting technique was done from two different perspectives: (i) comparing forecasted precipitation fields against radar measurements, and (ii) by means of a distributed rainfall runoff model, comparing hydrographs simulated with a hydrological model using rainfall fields forecasted by S-PROG against hydrographs generated with the model using the entire series of radar measurements. In both cases, results obtained by a simpler nowcasting technique are used as a reference to evaluate improvements. Validation showed that precipitation fields forecasted with S-PROG seem to be better than fields forecasted using simpler techniques. Additionally, hydrological validation led the authors to point out that the use of radar-based nowcasting techniques allows the anticipation window in which flow estimates are forecasted with enough quality to be sensibly extended.

scholarly journals Factors Affecting Business Strategy Implementation of Vietnam Garment Companies

2016 ◽  
Vol 12 (1) ◽  
pp. 133
Author(s):  
Hoang Viet Nguyen ◽  
Duc Nhuan Nguyen
Keyword(s):  
Human Resources ◽  
Corporate Culture ◽  
Business Strategy ◽  
Positive Relationship ◽  
Strategy Implementation ◽  
Point Of View ◽  
Strategy Formulation ◽  
Factors Affecting ◽  
Significant Positive Relationship ◽  
The Impact

This paper studies the impact of factors affecting on business strategy implementation of Vietnam garment companies. A total of 192 questionnaires were administered to respondents chosen from 82 Vietnam garment companies. The findings indicated that there is a significant positive relationship between 05 factors: Strategy formulation-Human resources-Communication-Corporate culture-Organizational structure and business strategy implementation from the sample point of view.

scholarly journals Summary of a Report on a Survey of the Fal Estuary Oyster Beds: (November, 1924),: With Notes on the Biology of the Oyster (O. edulis)

1927 ◽  
Vol 14 (3) ◽  
pp. 615-628 ◽  
Author(s):  
J. H. Orton ◽  
D. Bartley Stevenson
Keyword(s):  
Point Of View ◽  
Large Majority ◽  
Average Growth ◽  
Fair Proportion ◽  
Pass Through ◽  
Better Than

The spatfall in 1924, as in 1923, was very slight and from the point of view of the oyster-producer was a failure, and was little better in 1922.The growth of oysters in the summer of 1924 was unusually great; this has had the effect of bringing a large proportion of small oysters to a legally takeable size.The dredging results have, therefore, been much better than they were expected to be in the season of 1924–25, but the effect has been to deplete the beds still more of reserve stocks of small.Practically all the present stocks of small oysters are of a size between 2 and 2½ inches.With only average growth in 1925 and 1926 a large majority of these small oysters will have attained a size which will not pass through a 2½-inch ring; hence the beds are in a dangerous state.If, therefore, dredging continues under the present conditions, almost the whole of the present stock of small will have grown to large oysters and be cleared off the beds in the season of 1926–27.It is shown that although oysters may grow to a size of 2½ inches at Falmouth in small numbers in three summers, yet four summers are required before a fair proportion of spat can be expected to attain a size of 2½ inches.

scholarly journals The Factors of Deterioration of Natural Pastures From The View Point of Agricultural Employees in Al-Muthanna Governorate

2021 ◽  
Vol 923 (1) ◽  
pp. 012066
Author(s):  
Emad Fahad Nafeh Al-Bahli ◽  
Mahmoud Hadis Jassim Al-Jumaili
Keyword(s):  
Personal Characteristics ◽  
Research Area ◽  
Point Of View ◽  
Personal Factors ◽  
Factors Affecting ◽  
Work Location ◽  
Natural Factors ◽  
Significant Difference ◽  
The Impact ◽  
Selection Of

Abstract The research aimed to determine the impact studied factors represented by (people’s activities, government activities, natural factors) on the deterioration of natural pastures in the Governorate of Al-Muthanna the point of view of agricultural employees in the governorate. The research included all agricultural employees with a preparatory scientific qualification in agriculture and above in the governorate their number is (94) employees. A questionnaire was prepared to collect the data necessary to achieve the objectives of the research. It consisted of two parts. The first part included the factors related to the employees, which are (term of service, academic achievement, participation in extension activities, job position and work location). The second part included a measure to identify the agricultural employees’ the point of view of on the factors affecting the deterioration of natural pastures. It consists of (46) section spread over (3) field covered by the research. The results showed that government activities have the most impact on the deterioration of natural pastures, it was found a statistically significant difference in the respondents’ point of view about the influence of the studied factors according to their personal characteristics. The researchers concluded the necessity of agricultural expansion in pasture lands and industrial investments, as well as the importance of personal factors in assigning employees who can work in the development of natural pastures, and the researchers recommend activating government laws for the protection of natural pastures to prevent abuses (people’s activities, government activities) that contributed greatly to the deterioration of vegetation cover in the research area and taking into account the factors studied in the selection of workers in the development of natural pastures in the research area.

scholarly journals Between biology and medicine: perspectives on the use of dendritic cells in anticancer therapy

2017 ◽  
Vol 71 (0) ◽  
pp. 0-0
Author(s):  
Agnieszka Szczygieł ◽  
Elżbieta Pajtasz-Piasecka
Keyword(s):  
Dendritic Cells ◽  
Ex Vivo ◽  
Anticancer Therapy ◽  
Point Of View ◽  
Proper Function ◽  
Innate And Adaptive Immunity ◽  
Factors Affecting ◽  
Antigen Presenting

Dendritic cells (DCs), as a link between innate and adaptive immunity, play a pivotal role in maintaining homeostasis of the immune system. The DC population is characterized by heterogeneity; it consists of many subpopulations which, despite their phenotypic and localization differences, play an essential function – they are professional antigen presenting cells. Due to their role, DCs can be utilized in a new cancer treatment strategy. Their main purpose is to generate an anticancer response leading to the elimination of cancer cells. The tumor microenvironment, abundant in immunosuppressive factors (e.g. IL-10, TGF-β, Arg1, IDO), impairs the proper function of DCs. For this reason, various strategies are necessary for ex vivo preparation of DC-based vaccines and for the support of in vivo DCs to fight against tumors. DC-based vaccines are combined with other forms of immunotherapy (e.g. blockade of immune checkpoint molecules, e.g. PD-1 or CTLA-4) or conventional types of therapies (e.g. chemotherapy). Despite the enormous progress that has been made in anticancer therapy in the past two decades, there are still many unresolved issues regarding the effectiveness of the DCs usage. In this paper we described, in both a mouse and a human subject, a series of DC subpopulations, differentiating in normal conditions or under the influence of cancer microenvironment. We listed factors affecting the quality of the in vivo and ex vivo generations of antitumoral responses, significant from a therapeutic point of view. Moreover, the most important strategies for the use of DCs in anticancer therapies, as well as further developments on this field, have been discussed.

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