scholarly journals Single and multiple solution algorithms to scan asteroid databases for identifications

2006 ◽  
Vol 2 (S236) ◽  
pp. 269-280
Author(s):  
Maria E. Sansaturio ◽  
O. Arratia

AbstractThe process of cataloguing the minor planet population of the Solar System has experienced a great advance in the last decades with the start-up of several surveys. The large volume of data generated by them has increased with time and given rise to huge databases of asteroids with uneven qualities.In fact, a significant fraction of these objects have not been enough observed, thus leading to the computation of very poor quality orbits as to carry out useful predictions of the positions of such asteroids. As a result, some objects can get lost, which is particularly embarrassing for those with Earth crossing orbits.When this situation persists for a long time, the aforementioned databases end up contaminated in the sense that they contain more than one discovery for the same physical object and some kind of action must be taken. The algorithms for asteroid identifications are thought precisely to mitigate this problem and their design will depend upon the quality of the available data for the objects to be identified.In this paper we will distinguish two cases: when both objects have a nominal orbit and when one of them lacks it. In addition, when the available data poorly constrain the solution, other orbits in the neighbourhood of the nominal one are also compatible with the observations. Using these alternative orbits allows us to find many identifications that otherwise would be missed. Finally, we will show the efficiency of all these algorithms when applied to the datasets distributed by the Minor Planet Center.

2010 ◽  
Vol 16 (2) ◽  
pp. 243-263
Author(s):  
Ana Portolan

For a long time basic accommodation capacities represented the dominant type of accommodation in tourist offer, while at the same time complementary accommodation capacities were neglected. However, recently there has been a growing interest for complementary, substitute types of tourist accommodation, both in the Republic of Croatia and in Dubrovnik, where since 2000 a significant increase of over night stays has been registered, especially in private accommodation. In this paper rooms, apartments, studio apartments and holiday houses owned by physical entities are referred to as private accommodation. Private accommodation enables tourists to engage in everyday life of local residents, learn about history, tradition and culture of a destination. Thus, a tourist may experience and taste the beauties and attractions of a place, truly enjoy autochthonous products and services, as well as obtain genuine knowledge on authentic attractions and tourist offer of a destination. Inadequate offer of private tourist accommodation has negative influence when forming the overall tourist offer of a destination. Poor quality of accommodation units, unprofessional conduct of holders of tourist accommodation offer towards consumers and lack of interest for the needs and wishes of the consumer of this complementary accommodation have all contributed in creating a bad image on this kind of accommodation in tourist offer. Consequently, this paper aims, by analysing the consumers of private tourist accommodation, to point out the importance of private accommodation in overal tourist offer of a destination, to prove that private accommodation tourist offer attracts an increasing number of tourists, and propose to local tourist administration directives on how to create a more efficient procedure in order to ensure a more efficient and better quality administration of tourist private accommodation offer, aiming to improve the overall tourist offer at a destination.


Author(s):  
Jered H Dean ◽  
Douglas L Van Bossuyt

The Colorado School of Mines (CSM) hosts the oldest Humanitarian Engineering (HE) minor program in the USA, originally started in 2004.  During the 2012/2013 academic year the program was overhauled and new curriculum was introduced.  Several deficiencies in senior capstone courses were noted including poor quality of designs resulting from the tyranny of the rigid semester schedule; students focusing on the technical aspects of a design project while largely ignoring the social, financial, and sustainable aspects; and a loss of knowledge between academic terms due to turnover of students.  These were addressed in the development of the Projects for People course through several methods.  The course has been offered for two semesters and will be offered in multiple sections in the immediate future.  Students, CSM faculty, and NGO partners have all found the course to be useful and rigorous, and the HE faculty have found the resulting designs to be of high quality.


2021 ◽  
Vol 14 (2) ◽  
pp. 179-190
Author(s):  
Nabaz Nawzad Abdullah ◽  
Masayu Binti Othman

The authors examined the importance of integrated tasks of entrepreneurship among young individuals in Kurdistan. The study aimed to evaluate the level of youth understanding of entrepreneurship. The data was collected from 242 youth and the frequencies have been used to measure the weights of the tasks from the youth perspective. The authors found ideas, training, knowledge, competencies, and skills are sufficiently important to youth entrepreneurship success. The study also indicated that young individuals in Kurdistan Region are not aware of the entrepreneurship dimensions as the tasks, but they still found it as an integrated part of entrepreneurship. The lack of creativity, initiative, and innovation among youth is found to be associated with poor quality of youth in identifying opportunities and risk–taking due to the lack of understanding and knowledge as pre–conditions to the business start–up.


1997 ◽  
Vol 165 ◽  
pp. 123-130
Author(s):  
J.-E. Arlot ◽  
F. Colas

Astrometry in the solar system made more progress during the past ten years than it did during the seven or eight decades before. In fact, the development of large refractors with micrometers, and after the improvement of the photographic technique, allowed one to get very accurate positions at the end of the 19th century. After that, relatively little progress was made. Astronomers faced several difficulties: first, was the poor sensitivity of the photographic plates leading to long exposures and therefore to low accuracy for faint objects; second, was the poor quality of the catalogues of stars which depended upon a very small number of available astrometric reference stars.New receptors appeared around the 1950, such as electronic cameras or T.V. tubes. But, most of these new receptors were not interesting for astrometry, mainly because of the field of view – which was too small – and of the difficulty of using such receptors. However, the development of a new technique based upon the CCD targets changed most of the astrometric observational programs. In fact, CCD receptors were made for small fields, but the CCDs were easy to use; the images were numerical, allowing processing by computers, and the sensitivity was much more important. Because of that, the accuracy increased and relative astrometry was developed. The recent development of new catalogues, such as the Guide Star Catalogue and Tycho, permits astronomers to reduce small fields, which was not possible earlier.


2019 ◽  
Vol 2 (4) ◽  
pp. 143-149
Author(s):  
C.A. Verdeja-Robles ◽  
C.E. Velazquez-De la Rosa ◽  
A. Gutiérrez-Morgas

Abstract Objective: to know the prevalence of depression in patients with moderate-severe acne vulgaris. Hypothesis: the incidence of depression increases in patients with moderate-severe acne vulgaris and will therefore decrease the quality of life. Background: acne is a very frequent dermatosis in the outpatient clinic, it is not considered a life-threatening disease. It has been associated with negative emotional status. Also, suffering from it for a long time has been associated with depression, anxiety and frustration. The complications of acne in the psychosocial aspect are related to academic or vocational performance, self-esteem and adolescents’ quality of life. Materials and Methods: the type of study was retrospective cross-sectional descriptive observational study. The sampling was carried out at the facilities of the Popular Autonomous University of the State of Puebla, taking into account any person within the institutional organisation within the range of 12-20 years of age, with a total of 50 participants. The Hamilton assessment scale of depression and the Cardiff Acne disability index were applied to all patients with dermatological diagnosis of moderate-severe vulgar acne in a period between February-October 2019. Results: a total of 50patients were analysed, of which 28 were women aged 12 to 20 years and 22 men (28 women and 13 men) and severe acne in 9 patients, all over 17 years of age and male. According to the degree of depression, 28% (n = 14) of the patients were obtained without some degree of depression; 60% (n = 30) with minor depression; 12% (n = 6) with moderate depression. Regarding the quality of life: 40% (n = 20) of the patients showed good quality of life, 46% (n = 23) regular quality of life and 14% (n = 7) showed poor quality of life. Conclusion: orderly study of the psychic impact of acne and other skin diseases on people suffering them is recent and is carried out through questionnaires that try to measure the impact the diseases have on the patients’ quality of life.


2020 ◽  
Vol 21 (1) ◽  
pp. 102-117
Author(s):  
Novia Zalmita ◽  
Muhajirah Muhajirah ◽  
Abdul Wahab Abdi

One that influences human resource indicators is education. The teacher is a profession as a job of academic specialization in a relatively long time in college. Understanding related to teacher competence is very important to have by a prospective teacher because it can affect the quality of performance as a professional teacher. The teacher's competence is known as pedagogic, professional, social and personality competencies. The issue in this study is how the competency of the teacher of the Department of Geography Education FKIP Unsyiah as a prospective teacher of geography? The purpose of this study was to determine the competence of teachers in the Department of Geography Education FKIP Unsyiah as prospective geography teachers. Quantitative description approach is used in this study to find answers to the issue. The population in this study were students of the Department of Geography Education FKIP Unsyiah class of 2015 and 2016 who had been declared to have passed the Micro Teaching and Magang Kependidikan 3 course totaling 50 people. Because the population is small and can be reached, the determination of the sample using total sampling techniques so that the sample in this study is the whole population. Data collection is done by distributing test questions to respondents. The data was analyzed using the descriptive statistics percentage formula. The results of the study indicate that the level of teacher competence of Geography Education Department students as prospective teachers is in the moderate category, namely as many as 22 respondents (44%). A total of 12 respondents (24%) were in the high category, 15 respondents (30%) were in the low category and 1 respondent (2%) were in the very low category.


2020 ◽  
pp. 34-36
Author(s):  
M. A. Pokhaznikova ◽  
E. A. Andreeva ◽  
O. Yu. Kuznetsova

The article discusses the experience of teaching and conducting spirometry of general practitioners as part of the RESPECT study (RESearch on the PrEvalence and the diagnosis of COPD and its Tobacco-related aetiology). A total of 33 trained in spirometry general practitioners performed a study of 3119 patients. Quality criteria met 84.1% of spirometric studies. The analysis of the most common mistakes made by doctors during the forced expiratory maneuver is included. The most frequent errors were expiration exhalation of less than 6s (54%), non-maximal effort throughout the test and lack of reproducibility (11.3%). Independent predictors of poor spirogram quality were male gender, obstruction (FEV1 /FVC<0.7), and the center where the study was performed. The number of good-quality spirograms ranged from 96.1% (95% CI 83.2–110.4) to 59.8% (95% CI 49.6–71.4) depending on the center. Subsequently, an analysis of the reasons behind the poor quality of research in individual centers was conducted and the identified shortcomings were eliminated. The poor quality of the spirograms was associated either with the errors of the doctors who undertook the study or with the technical malfunctions of the spirometer.


1991 ◽  
Vol 223 ◽  
Author(s):  
Hans P. Zappe ◽  
Gudrun Kaufel

ABSTRACTThe effect of numerous plasma reative ion etch and physical milling processes on the electrical behavior of GaAs bulk substrates has been investigated by means of electric microwave absorption. It was seen that plasma treatments at quite low energies may significantly affect the electrical quality of the etched semiconductor. Predominantly physical plasma etchants (Ar) were seen to create significant damage at very low energies. Chemical processes (involving Cl or F), while somewhat less pernicious, also gave rise to electrical substrate damage, the effect greater for hydrogenic ambients. Whereas rapid thermal anneal treatments tend to worsen the electrical integrity, some substrates respond positively to long-time high temperature anneal steps.


2020 ◽  
Vol 10 (2) ◽  
pp. 175
Author(s):  
Nomensen Freddy Siahaan

After a long time was not heard to the public area, lately death penalty toward the criminal cases that classified as extraordinary crime are appear. The author discovers electronic article about the execution of the death penalty which is the prosecutor prepares to execute death penalty toward the drugs dealer. The president of Republic of Indonesia stated that it is necessary to give a deterrent effect to the convicted  criminal and keep the morality of Indonesian teenagers. According to my opinion, the author argues that it will be better and wiser if we discuss about renovating all of the Penitentiary in Indonesia than debating whether death penalty could be done in Indonesia or not, because it will be displeasure many parties, death penalty infringed the human rights of the convicted criminals and cause psychological burden to them, families, the executor of the death penalty, and other parties. Because if we have to improve the quality of the Penitentiary, if the function of Penitentiary for fostering moralily has been optimal or properly enough to the convicted criminals, Indonesia will be no longer need the death penalty option as sanction to the convicted crimanals including for the extraordinary crime (especially for drugs trafficking in our country). Penitentiary is one of the public services which aims for fostering the people that initially have bad habits (commited to the crime), so that they will have the awareness to change their bad attitude into the be better ones, will not harm others, and positively contributed to the society. Already Penitentiary’s conditions should be designed in such a way and as good as possible, so that the inmates feels like at their own home (like having a second home after his own home), and feel humaner to spend their days in the Penitentiary. The author believes that if the Penitentiary has been improved and optimized its function well, then the real purpose of Penitentiary will definitely achieved. As stated in Law Number 12 Year 1995 regarding to Penitentiary Article 2 which states "sanction system are organized in order to fostering the convicted criminals in order to be the real man, aware of their fault, improve themselves, and not to repeat the criminal act so that they can be friendly received by the community, can actively participated in the development of our country, and can socialize themselves as good citizen."Article 3 on this regulation also intensifies the function of Penitentiary "the function of Penitentiary is to prepare convicted criminals to be able to properly integrated to the society, so they can be accepted again as members of the public who are free and responsible ones." 


2019 ◽  
Vol 7 (3) ◽  
pp. 232-237
Author(s):  
Hana Larasati ◽  
Theresia Titin Marlina

Background: stroke is a disorder of nervous system function that occurs suddenly and is caused by brain bleeding disorders that can affect the quality of life physical dimensions, social dimensions, psychological dimensions, environmental dimensions. Based on the result of Lumbu study (2015) the number of samples were 71 people collected data using the (WHOQOL-BREF). There were 56 people (78,9%) had the poor quality of life of post stroke. The mean of post-stroke quality of life domain was physical domain (45,27%), psychological domain (49,87%), social relations domain (48,15%) and environmental domain (50.01%). Objective: the purpose of the study was know the quality of life of the stroke patients in Outpatient Polyclinic of Private Hospital in Yogyakarta. Methods: used descriptive quantitative by using questionnaire test of purposive sampling system based on patients who have been affected of ischemic or hemorrhagic stroke before, number 30 respondents. Result: quality of life of stroke patient of medium physical dimension (67%), psychological dimension (71%), social dimension (67%), dimension good environment (63%). Conclusion: the quality of life of stroke patients of physical dimension, psychological dimension, and moderate social dimension, while the quality of life of stroke patients were good environmental dimension.   Keywords: Hemorrhagic stroke, ischemic stroke, quality of life


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