127 research outputs found
Talent in the Professional Practice - The Hungarian higher education with a practice based approach, the example of the University of Pecs
The study presents a research carried out among the students of Hungary’s one of the most successful university faculties, at the University of Pécs Faculty of Business and Economics (PTE KTK). The aim of the study is to highlight the expectations of employers and students regarding professional practice. Our results show that the employers do not focus on creativity. By employing a new staff member fast integration, adaptation, diligent and precise work becomes important. Primarily employers want to hire such appropriate person who fits into their own corporate culture. The PTE KTK students have developed emotional intelligence, which allows for better integration.After presenting the results of empirical research we give a brief overview of the Hungarian and Romanian situation of higher education on the basis of criteria for the European Higher Education Area and the Bologna process. Subsequently, we formulate our recommendations, which are primarily based on the experience of professional practice. The system of professional practice serves as a highly effective feedback, and this shows the removal of the conventional belief. Secondly, there is a demand for bipolar system of knowledge and skill-application (that manifested in competence-principle).professional practice; talent management; career management; labor market; requirements; skills of students.
Role of membranes in mammalian stress response : sensing, lipid signals and adaptation
It was suggested that under heat stress the accumulation of denatured proteins alone triggers the expression of heat shock proteins. However, earlier research suggested that during abrupt temperature fluctuations membranes represent the most thermally-sensitive macromolecular structures. The aim of this thesis to confirm experimentally for the membrane sensor theory in mammalian cells and to explore the mechanisms behind membrane lipid structural reorganizations. The main results are as follows: (i) I provide the first evidence that heat-analogous, chemically-induced membrane perturbation of K562 erythroleukemic cells is indeed capable of activating heat shock protein formation at the growth temperature, without causing measurable protein denaturation; (ii) I showed that the membrane fluidizer benzyl alcohol acts as a chaperone-inducer also in B16(F10) melanoma cells. Furthermore, following both alcohol and heat treatments, condensation of ordered plasma membrane domains was detected by fluorescence microscopy; (iii) lipidomic fingerprints revealed that stress achieved either by heat or benzyl alcohol resulted in pronounced and highly specific alterations of membrane lipids in B16(F10) cells. The loss in polyenes with the concomitant increase in saturated lipid species was shown to be a consequence of activation of phospholipases. The accumulation of lipid species with raft-forming properties may explain the condensation of ordered plasma membrane domains detected previously; (iv) with Laurdan two-photon microscopy it was demonstrated that, in contrast to the formation of ordered domains in surface membranes, the molecular disorder is significantly elevated within the internal membranes of cells preexposed to mild heat stress. These results were compared with those obtained by other probes and visualisation methods. It was found that the structurally different probes revealed substantially distinct alterations in membrane heterogeneity. The results highlight that even subtle changes in membrane microstructure may play a role in temperature sensing and thermal cell killing and, therefore, could have potential in treatment of several diseases.EThOS - Electronic Theses Online ServiceGBUnited Kingdo
Role of membranes in mammalian stress response: sensing, lipid signals and adaptation
It was suggested that under heat stress the accumulation of denatured proteins alone triggers the expression of heat shock proteins. However, earlier research suggested that during abrupt temperature fluctuations membranes represent the most thermally-sensitive macromolecular structures. The aim of this thesis to confirm experimentally for the membrane sensor theory in mammalian cells and to explore the mechanisms behind membrane lipid structural reorganizations. The main results are as follows: (i) I provide the first evidence that heat-analogous, chemically-induced membrane perturbation of K562 erythroleukemic cells is indeed capable of activating heat shock protein formation at the growth temperature, without causing measurable protein denaturation; (ii) I showed that the membrane fluidizer benzyl alcohol acts as a chaperone-inducer also in B16(F10) melanoma cells. Furthermore, following both alcohol and heat treatments, condensation of ordered plasma membrane domains was detected by fluorescence microscopy; (iii) lipidomic fingerprints revealed that stress achieved either by heat or benzyl alcohol resulted in pronounced and highly specific alterations of membrane lipids in B16(F10) cells. The loss in polyenes with the concomitant increase in saturated lipid species was shown to be a consequence of activation of phospholipases. The accumulation of lipid species with raft-forming properties may explain the condensation of ordered plasma membrane domains detected previously; (iv) with Laurdan two-photon microscopy it was demonstrated that, in contrast to the formation of ordered domains in surface membranes, the molecular disorder is significantly elevated within the internal membranes of cells preexposed to mild heat stress. These results were compared with those obtained by other probes and visualisation methods. It was found that the structurally different probes revealed substantially distinct alterations in membrane heterogeneity. The results highlight that even subtle changes in membrane microstructure may play a role in temperature sensing and thermal cell killing and, therefore, could have potential in treatment of several diseases
Usefulness of 99mTc(V)-dimercaptosuccinic acid scintigraphy in the assessment of response to external radiation therapy in soft tissue sarcoma in Giant Snauzer dog
A nine-year-old male black Giant Schnauzer dog was referred
for the scintigraphic evaluation with a history of malignant fibrosarcoma
with a rapidly growing non painful mass on the left shoulder
region quite near to the site of an operation performed four months
ago. We carried out oncological scintigraphy using pentavalent
99mTechnetium labelled dimercaptosuccinic acid [99mTc(V)-DMSA], a tumour localising radiopharmaceutical agent. The study
was performed to assess the margins, vascularity of the tumour
and response to the cancer therapy. Uniform intense radiopharmaceutical
uptake was observed in the lesion indicating its margins,
vascularity and malignant nature. The dog was subjected to
external radiation therapy to control the growth of the cancer and
to bring the tumour mass to an operable size. The dog was followed
up with 99mTc(V)-DMSA scintigraphy pre-irradiation and
post-irradiation. Immediately after the post-irradiation scintigraphy,
the dog was operated on. During the surgery, resection of
the tumour margins was performed carefully using
a hand held gamma probe to assure that no tumour tissue was
left inside. In conclusion, the authors would like to state that
99mTc(V)-DMSA oncoscintigraphy is valuable in the assessment
and evaluation of therapy in canine soft tissue cancer
Neurochemical changes in different brain regions induced by PACAP - relations to neuroprotection
Real-time light-field 3D telepresence
Light-field technology is often looked at as the final frontier of glasses-free 3D visualization, as no additional viewing gear is required to experience its capabilities to their full extent. Among the numerous industrial and commercial use cases, light-field telepresence stands out, as such natural visualization may significantly boost the sense of presence. In this paper, we present a fully-implemented real-time light-field 3D telepresence system. We provide a comprehensive analysis of the implementation of the one-way system, highlighting how the achieved capabilities satisfy the reasonable requirements towards such system. The paper also discusses future enhancements to the 3D telepresence system, since its true potential is yet to be fulfilled
A Stellar Mass Threshold for Quenching of Field Galaxies
We demonstrate that dwarf galaxies (10^7 < M_stellar < 10^9 Msun) with no
active star formation are extremely rare (<0.06%) in the field. Our sample is
based on the NASA-Sloan Atlas which is a re-analysis of the Sloan Digital Sky
Survey Data Release 8. We examine the relative number of quenched versus star
forming dwarf galaxies, defining quenched galaxies as having no Halpha emission
(EW_Halpha < 2 AA) and a strong 4000AA-break. The fraction of quenched dwarf
galaxies decreases rapidly with increasing distance from a massive host,
leveling off for distances beyond 1.5 Mpc. We define galaxies beyond 1.5 Mpc of
a massive host galaxy to be in the field. We demonstrate that there is a
stellar mass threshold of M_stellar < 1.0x10^9 Msun below which quenched
galaxies do not exist in the field. Below this threshold, we find that none of
the 2951 field dwarf galaxies are quenched; all field dwarf galaxies show
evidence for recent star formation. Correcting for volume effects, this
corresponds to a 1-sigma upper limit on the quenched fraction of 0.06%. In more
dense environments, quenched galaxies account for 23% of the dwarf population
over the same stellar mass range. The majority of quenched dwarf galaxies
(often classified as dwarf elliptical galaxies) are within 2 virial radii of a
massive galaxy, and only a few percent of quenched dwarf galaxies exist beyond
4 virial radii. Thus, for galaxies with stellar mass less than 1.0x10^9 Msun,
ending star-formation requires the presence of a more massive neighbor,
providing a stringent constraint on models of star formation feedback.Comment: 9 pages, 6 figures, accepted to Ap
Relationship between Hubble type and spectroscopic class in local galaxies
We compare the Hubble type and the spectroscopic class of the galaxies with
spectra in SDSS/DR7. As it is long known, elliptical galaxies tend to be red
whereas spiral galaxies tend to be blue, however, this relationship presents a
large scatter, which we measure and quantify in detail. We compare the
Automatic Spectroscopic K-means based classification (ASK) with most of the
commonly used morphological classifications. All of them provide consistent
results. Given a spectral class, the morphological type wavers with a standard
deviation between 2 and 3 T types, and the same large dispersion characterizes
the variability of spectral classes fixed the morphological type. The
distributions of Hubble types given an ASK class are very skewed -- they
present long tails that go to the late morphological types for the red
galaxies, and to the early morphological types for the blue spectroscopic
classes. The scatter is not produced by problems in the classification, and it
remains when particular subsets are considered. A considerable fraction of the
red galaxies are spirals (40--60 %), but they never present very late Hubble
types (Sd or later). Even though red spectra are not associated with
ellipticals, most ellipticals do have red spectra: 97 % of the ellipticals in
the morphological catalog by Nair & Abraham, used here for reference, belong to
ASK 0, 2 or 3. It contains only a 3 % of blue ellipticals. The galaxies in the
green valley class (ASK~5) are mostly spirals, and the AGN class (ASK 6)
presents a large scatter of Hubble types from E to Sd. From redshift 0.25 to
now the galaxies redden from ASK 2 to ASK 0, as expected from the passive
evolution of their stellar populations. Two of the ASK classes (1 and 4) gather
edge-on spirals, a property of interest in studies requiring knowing the
intrinsic shape of a galaxy (e.g., weak lensing calibration).Comment: Accepted for publication in ApJ. 16 pages. 12 Figs. 2 summary table
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