On following up newly-discovered earth-approaching minor planets

1974 ◽  
Vol 22 ◽  
pp. 73-75
Author(s):  
B. G. Marsden
Keyword(s):  
Fast Moving ◽  
Moving Objects ◽  
Information Service ◽  
Recent Experience ◽  
Minor Planets ◽  
Moderate Degree ◽  
Intelligent Action

AbstractRecent experience suggests that it is not necessary to introduce a 24-hour information service for following up discoveries of fast-moving objects. Success can be achieved by intelligent action and only a moderate degree of urgency. There is some interest in making deliberate searches for new Apollo objects and hence a great need for follow-up observations.

scholarly journals 280 one-opposition near-Earth asteroids recovered by the EURONEAR with the Isaac Newton Telescope

2018 ◽  
Vol 609 ◽  
pp. A105 ◽  
Author(s):  
O. Vaduvescu ◽  
L. Hudin ◽  
T. Mocnik ◽  
F. Char ◽  
A. Sonka ◽  
...  
Keyword(s):  
Moving Objects ◽  
Wide Field ◽  
Minor Planets ◽  
Main Belt ◽  
Isaac Newton ◽  
Isaac Newton Telescope ◽  
Fast Motion ◽  
The One ◽  
Near Earth Asteroids

Context. One-opposition near-Earth asteroids (NEAs) are growing in number, and they must be recovered to prevent loss and mismatch risk, and to improve their orbits, as they are likely to be too faint for detection in shallow surveys at future apparitions. Aims. We aimed to recover more than half of the one-opposition NEAs recommended for observations by the Minor Planet Center (MPC) using the Isaac Newton Telescope (INT) in soft-override mode and some fractions of available D-nights. During about 130 h in total between 2013 and 2016, we targeted 368 NEAs, among which 56 potentially hazardous asteroids (PHAs), observing 437 INT Wide Field Camera (WFC) fields and recovering 280 NEAs (76% of all targets). Methods. Engaging a core team of about ten students and amateurs, we used the THELI, Astrometrica, and the Find_Orb software to identify all moving objects using the blink and track-and-stack method for the faintest targets and plotting the positional uncertainty ellipse from NEODyS. Results. Most targets and recovered objects had apparent magnitudes centered around V ~ 22.8 mag, with some becoming as faint as V ~ 24 mag. One hundred and three objects (representing 28% of all targets) were recovered by EURONEAR alone by Aug. 2017. Orbital arcs were prolonged typically from a few weeks to a few years; our oldest recoveries reach 16 years. The O−C residuals for our 1854 NEA astrometric positions show that most measurements cluster closely around the origin. In addition to the recovered NEAs, 22 000 positions of about 3500 known minor planets and another 10 000 observations of about 1500 unknown objects (mostly main-belt objects) were promptly reported to the MPC by our team. Four new NEAs were discovered serendipitously in the analyzed fields and were promptly secured with the INT and other telescopes, while two more NEAs were lost due to extremely fast motion and lack of rapid follow-up time. They increase the counting to nine NEAs discovered by the EURONEAR in 2014 and 2015. Conclusions. Targeted projects to recover one-opposition NEAs are efficient in override access, especially using at least two-meter class and preferably larger field telescopes located in good sites, which appear even more efficient than the existing surveys.

Brief summary of Kleť photographic search programme for minor planets

1999 ◽  
Vol 173 ◽  
pp. 189-192
Author(s):  
J. Tichá ◽  
M. Tichý ◽  
Z. Moravec
Keyword(s):  
Ccd Camera ◽  
Minor Planet ◽  
Minor Planets ◽  
Main Belt

AbstractA long-term photographic search programme for minor planets was begun at the Kleť Observatory at the end of seventies using a 0.63-m Maksutov telescope, but with insufficient respect for long-arc follow-up astrometry. More than two thousand provisional designations were given to new Kleť discoveries. Since 1993 targeted follow-up astrometry of Kleť candidates has been performed with a 0.57-m reflector equipped with a CCD camera, and reliable orbits for many previous Kleť discoveries have been determined. The photographic programme results in more than 350 numbered minor planets credited to Kleť, one of the world's most prolific discovery sites. Nearly 50 per cent of them were numbered as a consequence of CCD follow-up observations since 1994.This brief summary describes the results of this Kleť photographic minor planet survey between 1977 and 1996. The majority of the Kleť photographic discoveries are main belt asteroids, but two Amor type asteroids and one Trojan have been found.

Robust Autonomous Car-Like Robot Tracking Based on Tracking-Learning-Detection

2014 ◽  
Vol 687-691 ◽  
pp. 564-571 ◽  
Author(s):  
Lin Bao Xu ◽  
Shu Ming Tang ◽  
Jin Feng Yang ◽  
Yan Min Dong
Keyword(s):  
Optical Flow ◽  
Fast Moving ◽  
Moving Objects ◽  
Tracking Algorithm ◽  
Robust Tracking ◽  
Symmetry Detection ◽  
Tracking Method ◽  
Robot Tracking ◽  
Improve Accuracy ◽  
First Time

This paper proposes a robust tracking algorithm for an autonomous car-like robot, and this algorithm is based on the Tracking-Learning-Detection (TLD). In this paper, the TLD method is extended to track the autonomous car-like robot for the first time. In order to improve accuracy and robustness of the proposed algorithm, a method of symmetry detection of autonomous car-like robot rear is integrated into the TLD. Moreover, the Median-Flow tracker in TLD is improved with a pyramid-based optical flow tracking method to capture fast moving objects. Extensive experiments and comparisons show the robustness of the proposed method.

Paracetamol Poisoning in Pregnancy: An Analysis of the Outcomes of Cases Referred to the Teratology Information Service of the National Poisons Information Service

1990 ◽  
Vol 9 (3) ◽  
pp. 147-153 ◽  
Author(s):  
P.R. McElhatton ◽  
F.M. Sullivan ◽  
G.N. Volans ◽  
R. Fitzpatrick
Keyword(s):  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Information Service ◽  
First Trimester ◽  
Paracetamol Overdose ◽  
Structural Development ◽  
Paracetamol Poisoning ◽  
Third Trimester ◽  
Neonatal Problems

A study was carried out to investigate the outcome of pregnancy in 115 women who had been exposed to paracetamol overdose. Follow up was obtained in 48 cases. Exposure occurred in all trimesters, and the most striking feature of this series is that the majority of the pregnancy outcomes were normal. None of the mothers died. There were 39 live born infants with no malformation, 14 of whom had been exposed in the first trimester. Four babies, exposed in the third trimester had neonatal problems, but these seem unrelated to paracetamol. There were two live born infants with gross malformations (spina bifida occulta; and cleft lip and palate). However, as the overdoses occurred at weeks 26 and 28 respectively, long after the structural development of these organs, the malformations could not have been caused by the paracetamol. There were two spontaneous abortions, both in the first trimester, which occurred two weeks after the overdose which may be related to the paracetamol. The overall conclusion is that paracetamol overdose per se is not necessarily an indication for termination of pregnancy.

scholarly journals A retrospective review on minimally invasive technique via endoscopic thoracic sympathectomy (ETS) in the treatment of severe primary hyperhidrosis: Experiences from the National Heart Institute, Malaysia

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 670
Author(s):  
Ahmad Farouk Musa ◽  
Vignaa Prashanth Gandhi ◽  
Jeswant Dillon ◽  
Rusli Bin Nordin
Keyword(s):  
Sweat Glands ◽  
Invasive Technique ◽  
Moderate Degree ◽  
Endoscopic Thoracic Sympathectomy ◽  
Thoracic Sympathectomy ◽  
Primary Hyperhidrosis ◽  
Response To Stress ◽  
Pertinent Information

Background: Hyperhidrosis is due to the hyperactive autonomic stimulation of the sweat glands in response to stress. Primary hyperhidrosis is a common yet psychologically disabling condition. This study will describe our experience in managing hyperhidrosis via endoscopic thoracic sympathectomy (ETS). Methods: The information was obtained from the patient records from 1st January 2011 until 31st December 2016. Pertinent information was extracted and keyed into a study proforma. Results:  150 patients were operated on but only 118 patients were included in this study. The mean age was 22.9±7.3 years. The majority (54.2%) had palmar-plantar hyperhidrosis and 39.8% had associated axillary hyperhidrosis. Excision of the sympathetic nerve chain and ganglia were the main surgical technique with the majority (55.9%) at T2-T3 level. Mean ETS procedure time was 46.6±14.29 minutes with no conversion. Surgical complications were minimal and no Horner’s Syndrome reported. Mean hospital stay was 3.5±1.05 days. The majority of patients (67.8%) had only one follow-up and only half of the study sample (58.5%) complained mild to moderate degree of compensatory sweating, even though the long-term resolution is yet to be determined by another study. Following ETS, 98.3% of patients had instant relief and resolved their palmar hyperhidrosis. Predictors of CS were sympathectomy level and follow-up. The odds of reporting CS was 2.87 times in patients undergoing ETS at the T2-T3 level compared to those undergoing ETS at the T2-T4 level. The odds of reporting CS was 13.56 times in patients having more than one follow-up compared to those having only one follow-up. Conclusion: We conclude that ETS is a safe, effective and aesthetically remarkable procedure for the treatment of primary hyperhidrosis  with only half of the patients developing mild to moderate degree of CS. Significant predictors of CS were sympathectomy level during ETS and frequency of follow-up after ETS.

Lipid and Lipoprotein Tracking in 108 Children Over a Four-Year Period

PEDIATRICS ◽  
1979 ◽  
Vol 64 (5) ◽  
pp. 584-591
Author(s):  
Peter Laskarzewski ◽  
John A. Morrison ◽  
Ido deGroot ◽  
Kathe A. Kelly ◽  
Margot J. Mellies ◽  
...  
Keyword(s):  
Plasma Cholesterol ◽  
Low Density Lipoprotein ◽  
Density Lipoprotein ◽  
Plasma Triglyceride ◽  
Considerable Proportion ◽  
Moderate Degree ◽  
Longitudinal Assessment ◽  
Highly Correlated ◽  
Lipids And Lipoproteins

This study was designed to assess "tracking" of plasma cholesterol, triglyceride, and high and low density lipoprotein cholesterol (C-HDL, C-LDL), in 108 children followed over a four-year period in the Cincinnati Lipid Research Clinic's Princeton School study. The correlations between initial and subsequent measurements of plasma cholesterol were respectively 0.65, 0.66, and 0.68 for observations one, two, and three years apart, P < .001; for plasma triglyceride they were 0.47, 0.37, and 0.39, P < .001. Initial and subsequent C-HDL and C-LDL levels were also highly correlated, r = .60, .53 (for C-HDL), r = .67 and .61 (for C-LDL), for observations two and three years apart, P < .001. Six of 13 children initially in the top decile for plasma cholesterol remained there over the four-year period. Only three of 11 children initially in the top decile for plasma triglyceride remained there over the four-year period. Plasma C-HDL levels initially in the top decile generally remained there, with 82% and 64% of children initially in the top decile remaining in the top two deciles on follow-up. Plasma C-LDL levels were more dispersed than C-HDL, with three of 11 children initially in the top decile remaining there after four years. A considerable proportion of the decrement in group mean levels of lipids and lipoproteins for children initially in the top deciles could be accounted for by regression toward the mean. Although initial and subsequent measures of lipids and lipoproteins in school children are closely correlated, and there is a moderate degree of tracking for children initially in the top deciles, only small numbers of children after four years of follow-up will retain persistent elevations of cholesterol, triglyceride, and C-LDL. Longitudinal assessment of children with elevated lipid and lipoprotein levels may permit early identification of risk factors which both increase risk to coronary heart disease in adulthood (cholesterol, triglyceride, C-LDL), or decrease it (C-HDL).

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