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Adaptive Tracking of Non-linear Dynamic Plants, Using the U-model

Adaptive tracking of non-linear dynamic plants is currently an important area of research. The main difficulty being felt by the research community is the lack of a general modelling framework that can facilitate synthesis of a simplistic control law while being capable of providing accurate approximation of non-linear systems. In this study a novel technique based on the control-oriented U-model

High intake of selenium, beta-carotene, and vitamins A, C, and E reduces growth of Helicobacter pylori in the guinea pig

PURPOSE: Helicobacter pylori is a human gastroduodenal pathogen associated with type-B gastritis and gastric cancer. Low gastric tissue antioxidant levels are believed to increase the risk of developing gastric cancer. We investigated whether dietary antioxidant levels protect against infection and type-B gastritis in H. pylori-infected guinea pigs. METHODS: Dunkin-Hartley guinea pigs infected for

Approximation numbers = singular values

This paper introduces a generalisation of the notion of singular value for Hilbert space operators to more general Banach spaces. It is shown that for a simple integral operator of Hardy type the singular values are the eigenvalues of a non-linear Sturm-Liouville equation and coincide with the approximation numbers of the operator. Finally, asymptotic formulas for the singular numbers are deduced.

S100B and cardiac surgery: Possibilities and limitations

Serum determinations of the glial protein S100B has been found to correlate with brain damage after cardiac surgery. Forty-eight hours and later after surgery, increased S100B levels correlates with the presence of brain infarction, and the extent of infracted brain tissue. S100B at this time-point has been shown to predict long-term outcome, higher S100B levels correlated with decreased survival.

Cytogenetic and molecular genetic analyses of endometrial stromal sarcoma: nonrandom involvement of chromosome arms 6p and 7p and confirmation of JAZF1/JJAZ1 gene fusion in t(7;17)

Endometrial stromal sarcomas (ESS) are rare neoplasms with the capacity both to invade the myometrium locally and to give rise to extrauterine metastases. Cytogenetic abnormalities have been reported in 22 cases of ESS, mostly involving rearrangements of chromosomes 6, 7, and 17. The most characteristic translocation of this tumor type, t(7;17)(p15-p21;q12-q21), was recently shown to generate a JA

A method for evaluation of manual work using synchronised video recordings and physiological measurements

Industrial interventions that focus on increased productivity may impair the ergonomics, on a workstation or individual level. This paper presents a method that characterises work time consumption and physical work load of manual work, using video recordings synchronised with physiological measurements of, e.g. muscular activity, and postures. The underlying idea was that it is possible to amalgam

Gloria in a multitude of voices

This article reconstructs a Hebrew version of the Gloria in Luke 1: 14 with its focus on the righteous remnant of Israel and then analyses the early versions in Greek, Latin, Syriac and Coptic. Finally it gives some later interpretations of the canticle in literature, art and music.

Glutathione S-transferase genotype and p53 mutations in adenocarcinoma of the small intestine

Adenocarcinoma of the small intestine (ASI) is a rare disease of unknown aetiology. The glutathione S-transferase M1 (GSTM1) enzyme catalyses the detoxification of compounds involved in carcinogenesis of adenocarcinoma of the stomach, colon and lung, including constituents of tobacco smoke. We investigated a possible interaction between the lack of GSTM1 enzyme activity and the carcinogenic compou

Frataxin deficiency in pancreatic islets causes diabetes due to loss of beta cell mass

Diabetes is caused by an absolute (type 1) or relative (type 2) deficiency of insulin-producing beta cells. We have disrupted expression of the mitochondrial protein frataxin selectively in pancreatic beta cells. Mice were born healthy but subsequently developed impaired glucose tolerance progressing to overt diabetes mellitus. These observations were explained by impairment of insulin secretion d

An experimental parametric study of VOC from flooring systems exposed to alkaline solutions

This study outlined the influence of a number of parameters affecting the emission rate from one of the largest sources of VOC in the building stock in the Nordic countries. This source is flooring systems of polyvinyl chloride or linoleum attached to a substrate of moisture damaged or insufficiently dried concrete. The secondary emission rate of degradation products was measured, with the Field a

Spatial characterization of urban mobile radio channels

We present statistical evaluations of wideband spatial dual-polarized radio channel measurements. Some 80 different street-level transmitter positions in downtown Helsinki, Finland, were measured. We chose three different receiver array sites below, at, and above the roofop level of the surrounding urban environment. A super-resolution algorithm allows the determination of the directions of arriva

Total cholesterol, glucose, and electrolytes in piglets serum after alpha-ketoglutarate (AKG) and dexamethasone treatment during prenatal and neonatal life

The aim Of this Study was to determine the effects of dexamethasone (Dex) and alpha-ketoglutarate (AKG) oil the total cholesterol, glucose, Na+, Cl-, total Ca and K+ levels, in serum for newborn and neonate piglets. The blood samples were collected from newborn non-suckling piglets born by sows administered front the 91(st) d of pregnancy to the parturition With AKG and/or Dex (AKG-0.4 g/kg b.w./e

Classification of metabolic and respiratory demands in fire fighting activity with extreme workloads

Fire fighting work comprises work tasks requiring an energy yield at maximal or close to maximal levels of the individual. Due to the very nature of fire fighting more complex physiological variables are difficult to measure. We measured metabolic and respiratory responses in 15 male.. professional fire fighters during simulated work tasks on a test ground. Work time was on the average 22 min with

Nicotine does not affect plasma lipoprotein concentrations in healthy men

The effects of nicotine administration (2 mg eight-times daily as nicotine chewing gum for two weeks) on plasma lipid and lipoprotein concentrations were studied in young healthy volunteers. Plasma levels of the nicotine metabolite, cotinine, reached levels comparable to those seen in smokers. Plasma concentrations of triglyceride, cholesterol, HDL cholesterol, LDL cholesterol, and apolipoproteins

Filmen som historisk källa - historiografi, pluralism och representativitet

This article discusses why films have not been used more than they have as historical sources and argues that films ought to be used more by historians. Principally, historians can use film in three basic ways, all of which give access to information about the period when it was produced. First, films can with caution be used for information about the persons, objects and events depicted in docum

Long-term retention of neurotoxic beta-carbolines in brain neuromelanin

beta-Carbolines show structural resemblance to the neurotoxic N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine and are metabolized to mitochondrial toxicants. Humans are continuously exposed to low levels of beta-carbolines through cooked food, coffee, alcoholic beverages and tobacco smoke. beta-Carbolines have previously been detected in higher levels in the pigmented substantia nigra than in the cor