Autor: Ostrowski, Jan. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Remarks on the dasymetric method
Autorzy:: Goleń, Jan
Ostrowski, Wiesław
Powiązania:: https://bibliotekanauki.pl/articles/2014141.pdf
Data publikacji:: 1996-06-01
Wydawca:: Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Źródło:: Miscellanea Geographica. Regional Studies on Development; 1996, 7; 251-260
0867-6046
2084-6118
Pojawia się w:: Miscellanea Geographica. Regional Studies on Development
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Applications of saddle-point determinants
Autorzy:: Hauke, Jan
Johnson, Charles
Ostrowski, Tadeusz
Powiązania:: https://bibliotekanauki.pl/articles/729145.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: bimatrix game
Mean Value Theorem
optimal mixed strategies
saddle point matrix
value of a game
volumes of simplices
Opis:: For a given square matrix $A ∈ M_n({ℝ})$ and the vector $e ∈ (ℝ)^{n}$ of ones denote by (A,e) the matrix
⎡ A e ⎤
⎣ $e^{T}$ 0 ⎦
This is often called the saddle point matrix and it plays a significant role in several branches of mathematics. Here we show some applications of it in: game theory and analysis. An application of specific saddle point matrices that are hollow, symmetric, and nonnegative is likewise shown in geometry as a generalization of Heron's formula to give the volume of a general simplex, as well as a conditions for its existence.
Źródło:: Discussiones Mathematicae - General Algebra and Applications; 2015, 35, 2; 213-220
1509-9415
Pojawia się w:: Discussiones Mathematicae - General Algebra and Applications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: A Case of Portomesenteric Venous Gas Detected on Computed Tomography
Autorzy:: Sierocka, Anita
Kalbarczyk, Katarzyna
Pawlus, Jan
Sulikowski, Tadeusz
Ostrowski, Marek
Powiązania:: https://bibliotekanauki.pl/articles/1396387.pdf
Data publikacji:: 2013-09-01
Wydawca:: Index Copernicus International
Tematy:: portomesenteric vein gas
pneumobilia
bowel pneumatosis
Opis:: Portomesenteric vein gas is a rare condition, which patogenesis is not completly understood. One of causes is e.g. mesenteric ischemia. Patogenesis of this condition are: intraabdominal sepsis, interventional procedures, liver transplantation, Crohn disease and trauma. In 15% of causes its idiopatic. Hepatic portal venous gas predict high risk of mortality (>50%). An advanced radiology techniques such as computed tomography can be helpfull in recognizing of this pathology stage. We want to report a case of 83-year-old man with acute abdominal pain after cardiovascular procedure, with portomesenteric vein gas and bowel pneumatosis detected on computed tomography.
Źródło:: Polish Journal of Surgery; 2013, 85, 9; 517-519
0032-373X
2299-2847
Pojawia się w:: Polish Journal of Surgery
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Pre-analytical-related variability influencing serum peptide profiles demonstrated in a mass spectrometry-based search for colorectal and prostate cancer biomarkers
Autorzy:: Karczmarski, Jakub
Rubel, Tymon
Mikula, Michal
Wolski, Jan
Rutkowski, Andrzej
Zagorowicz, Edyta
Dadlez, Michal
Ostrowski, Jerzy
Powiązania:: https://bibliotekanauki.pl/articles/1039544.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: mass spectrometry; peptidome; serum; cancer; fibrinopeptide A
apolipoprotein A-IV
Opis:: Although the degradome, which comprises proteolytic fragments of blood proteins, presents a potential source of diagnostic biomarkers, studies on cancer peptide biomarkers have provided inconsistent conclusions. In the present study, we reevaluated the usefulness of serum degradome analyses for searching peptide cancer biomarker candidates. Particular attention was paid to pre-analytical factors influencing the variability of determined peptide levels, including clotting time and control group selection. Studies were conducted on 44 and 86 serum samples collected from cancer patients and healthy individuals, respectively, using liquid chromatography electrospray ionization mass spectrometry (LC-ESI-MS)-based analyses. We identified 1373 unique peptides, nearly 40% of which originated from five blood proteins: fibrinogen alpha chain, apolipoprotein A-IV (APOA4), complement C3, apolipoprotein A-I, and alpha-1-antitrypsin. A set of 118 and 88 peptides exhibited highly significant differences (adjusted p-value ≤ 0.01 and fold change ≥ 2) in pair-wise comparisons of control vs. prostate cancer and control vs. colorectal cancer, respectively, with 37 peptides displaying a consistent direction of change for these pair-wise comparisons. The levels of 67 peptides differed significantly in serum samples collected from healthy individuals immediately prior to colonoscopy and those who underwent colonoscopic examination at least four weeks earlier. Of them, 49 peptides originated from APOA4. Whereas earlier studies, including ours, have utilized fragments of fibrinopeptide A (FPA) to distinguish cancer from healthy cases, here we show that their absolute abundance is a sensitive indicator of clotting time. These observations may have implications for future serum peptidome studies since these issues have not previously been recognized.
Źródło:: Acta Biochimica Polonica; 2013, 60, 3; 417-425
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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