Temat: rigidity condition - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A differential motion planning algorithm for controlling multi-robot systems handling a common object
Autorzy:: Tzafestas, C.
Prokopiou, P.
Tzafestas, S.
Powiązania:: https://bibliotekanauki.pl/articles/205881.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:: robot
cooperative robots
incremental robot motion planning
manipulator kinematic
master and two-slaves system
multi-robot kinematics
multi-robot systems
path planning
rigidity condition
Opis:: Multi-robot systems have substantially increased capabilities over single-robot systems and can handle very large or peculiar objects. This paper presents a differential (incremental) motion planning algorithm for an m-robot system (m >or=2) to cooperatively transfer an object from an initial to a desired final position / orientation by rigidly holding it at given respective points Q[sub 1], Q[sub 2],..., Q[sub m]. One of the robots plays the role of a "master" while other robots operate in the "slave" mode maintaining invariant their relative positions and orientations during the system motion. The method employs the differential displacements of the end-effector of each robot arm. Then, the differential displacements of the joints of the m robots are computed for the application of incremental motion control. The algorithm was tested on many examples. A representative of them is shown here, concerning the case of three STAUBLI RX-90L robots similar to 6-dof PUMA robots. The results obtained show the practicality and effectiveness of the method, which, however, needs particular care for completely eliminating the cumulative errors that may occur.
Źródło:: Control and Cybernetics; 2000, 29, 2; 567-584
0324-8569
Pojawia się w:: Control and Cybernetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Life-threatening conditions in psychiatry - neuroleptic malignant syndrome (NMS)
Autorzy:: Kucmin, T.
Kucmin, A.
Plowas-Goral, M.
Jojczuk, M.
Powiązania:: https://bibliotekanauki.pl/articles/3658.pdf
Data publikacji:: 2015
Wydawca:: Instytut Medycyny Wsi
Tematy:: life-threatening condition
psychiatry
neuroleptic malignant syndrome
muscle rigidity
hyperthermia
treatment
Opis:: The introduction of neuroleptics in the 1950’s was a turning point in psychiatric treatment. The new drugs brought hope to millions of patients and their doctors. However, there were also some side-effects, one of which is Neuroleptic malignant syndrome (NMS), a rare complication of antipsychotic treatment and untreated it may lead to mortality as high as 20%. The incidence of NMS, estimated to be 0.01–0.02%, has decreased significantly probably due to higher awareness of the diseases and shift to atypical antipsychotics. The aim of this study was to present the signs and symptoms of this rare condition and describe management possibilities since this condition is observed not only in psychiatric departments but also in emergency rooms. NMS is thought to be related to change caused by neuroleptics within the central nervous system due to dopamine D2 receptor antagonism, especially nigrostriatal pathways and the hypothalamus. There are three symptoms which are considered as major and indicate a high probability of NMS: muscle rigidity, hyperthermia (core body temperature above 38.5 °C), and elevated creatine phosphokinase concentration (above 1000 U/l). NMS is a diagnosis of exclusion and clinicians must be vigilant in detecting early signs of NMS. The basic management in NMS is antipsychotic discontinuation and proper supportive care of the patient (vital signs monitoring, hydration, correction of electrolyte and acid-base disturbances). In more severe cases, the introduction of bromocriptine or dantrolene, as well as benzodiazepines, may indicated. Further usage of neuroleptic in patients with a history of NMS should be with care, and low doses of low-potency neuroleptics or atypical neuroleptics seem to be the best treatment choice.
Źródło:: Journal of Pre-Clinical and Clinical Research; 2015, 09, 1
1898-2395
Pojawia się w:: Journal of Pre-Clinical and Clinical Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Ocena stalowych słupów dwugałęziowych tramwajowej sieci trakcyjnej
Evaluation of double-branched steel columns in a tram traction network
Autorzy:: Gosowski, B.
Lorkowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/163641.pdf
Data publikacji:: 2012
Wydawca:: Polski Związek Inżynierów i Techników Budownictwa
Tematy:: linia tramwajowa
sieć trakcyjna
słup trakcyjny
słup stalowy
słup dwugałęziowy
stan techniczny
uszkodzenie
sztywność skrętna
tram line
overhead line
power mast
steel mast
double-branched column
technical condition
torsional rigidity
Opis:: W artykule przeprowadzono analizę wpływu rozmieszczenia przewiązek na sztywność skrętną słupów. W ocenie konstrukcji rozważanych słupów zwrócono ponadto uwagę na jakość spoin łączących płaskowniki z gałęziami. Natomiast w ocenie stanu technicznego – na miejsca zagrożone korozją, a także uszkodzenia mechaniczne.
This article analyses the effect of the positioning of the batten plates on the torsional rigidity of steel columns. In an evaluation of the structural design of the columns, attention is also drawn to the quality of the joints between the flat bars and the branches. An evaluation of the technical condition of the columns draws attention to places at risk of corrosion, as well as mechanical damage.
Źródło:: Przegląd Budowlany; 2012, R. 83, nr 5, 5; 80-83
0033-2038
Pojawia się w:: Przegląd Budowlany
Dostawca treści:: Biblioteka Nauki

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