Temat: f-factor - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Strong ƒ-Star Factors of Graphs
Autorzy:: Yan, Zheng
Powiązania:: https://bibliotekanauki.pl/articles/31339350.pdf
Data publikacji:: 2015-08-01
Wydawca:: Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii
Tematy:: ƒ-star factor
strong ƒ-star factor
complete-cactus
factor of graph
Opis:: Let G be a graph and f : V (G) → {2, 3, . . .}. A spanning subgraph F is called strong f-star of G if each component of F is a star whose center x satisfies deg_F (x) ≤ ƒ(x) and F is an induced subgraph of G. In this paper, we prove that G has a strong f-star factor if and only if oddca(G − S) ≤ ∑_x∊S ƒ(x) for all S ⊂ V (G), where oddca(G) denotes the number of odd complete-cacti of G.
Źródło:: Discussiones Mathematicae Graph Theory; 2015, 35, 3; 475-482
2083-5892
Pojawia się w:: Discussiones Mathematicae Graph Theory
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Spin and lattice dynamics of La2/3Ca1/3MnO3 doped with 1% 119Sn
Autorzy:: Przewoźnik, J.
Żukrowski, J.
Chmist, J.
Japa, E.
Kołodziejczyk, A.
Krop, K.
Kellner, K.
Gritzner, G.
Powiązania:: https://bibliotekanauki.pl/articles/147199.pdf
Data publikacji:: 2004
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: 119Sn Mössbauer
LCMO manganites
f-factor
metal-insulator
Opis:: 1 at.% 119Sn doped La0.67Ca0.33MnO3 compound was studied by Mössbauer spectroscopy, magnetization, AC susceptibility and resistivity measurements. Huge separation (66 K) of the transition temperatures from the ferromagnetic (FM) to paramagnetic (PM) state (TC) and from metallic to insulating state (TM-I) clearly shows that transition from FM metallic to PM insulator phase goes via FM insulator phase. The Mn lattice dynamics was studied by the relative changes of Lamb-Mössbauer factor f as a function of temperature. In the Debye approximation from the calculated ln(f/f0) values of the characteristic Debye temperatures (čD) were estimated for the FM (368(10) K) and PM (391(6) K) phases. No anomaly of -ln(f/f0) at TM-I and its rather spurious increase around TC was found. The 119Sn isotope as a local diamagnetic probe samples the transferred hyperfine field (Bhf) from its neighbour Mn magnetic moments and witnesses the dynamics of the Mn moments. Theoretical curve based on the molecular field theory was fitted to the experimental values of Bm hf ax and the value of the ordering temperature (TC * H 280 K) of Mn moments inside the large FM domains was estimated. It is much higher than the TC (172 K) obtained from magnetization measurement. The coexistence of FM and PM phases, which is evident from the shape of our 119Sn Mössbauer spectra, was confirmed for temperatures T e 150 K and indicates the inhomogeneous character of the magnetic transition.
Źródło:: Nukleonika; 2004, 49,suppl.3; 37-42
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Missing data estimation based on the chaining technique in survey sampling
Autorzy:: Singh Thakur, Narendra
Shukla, Diwakar
Powiązania:: https://bibliotekanauki.pl/articles/2156986.pdf
Data publikacji:: 2022-12-15
Wydawca:: Główny Urząd Statystyczny
Tematy:: estimation
missing data
chaining
imputation
bias
mean squared error (MSE)
factor type (F-T)
chain type estimator
double sampling
Opis:: Sample surveys are often affected by missing observations and non-response caused by the respondents' refusal or unwillingness to provide the requested information or due to their memory failure. In order to substitute the missing data, a procedure called imputation is applied, which uses the available data as a tool for the replacement of the missing values. Two auxiliary variables create a chain which is used to substitute the missing part of the sample. The aim of the paper is to present the application of the Chain-type factor estimator as a means of source imputation for the non-response units in an incomplete sample. The proposed strategies were found to be more efficient and bias-controllable than similar estimation procedures described in the relevant literature. These techniques could also be made nearly unbiased in relation to other selected parametric values. The findings are supported by a numerical study involving the use of a dataset, proving that the proposed techniques outperform other similar ones.
Źródło:: Statistics in Transition new series; 2022, 23, 4; 91-111
1234-7655
Pojawia się w:: Statistics in Transition new series
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: The role of E2F2 in signaling pathways associated with cancer pathogenesis and potential treatment: A review of current studies
Autorzy:: Domańska, Julia
Poboży, Kamil
Domański, Paweł
Fudalej, Marta
Deptała, Andrzej
Badowska-Kozakiewicz, Anna
Powiązania:: https://bibliotekanauki.pl/articles/22792539.pdf
Data publikacji:: 2023-07
Wydawca:: Medical Education
Tematy:: E2F2
E2F
cancer
transcription factor
oncology
p53
p21
Opis:: Introduction and objective. E2F transcription factor 2 (E2F2) protein is the transcription factor that plays an important role in tumorigenesis. E2F2 effects the cell cycle, tumor suppressor proteins, and can also be transformed by proteins of small DNA tumor viruses. The objective of the study is to provide a summary of the current knowledge on the neoplastic pathways that involve E2F2. State of knowledge. Numerous studies have demonstrated a role for E2F2 in various signaling pathways. Certain components of these pathways may serve as potential targets for oncological therapy. E2F2 has been shown to be associated with neoplasms of various locations and histological types (breast, colon, gastric, laryngeal, liver, lung, ovarian, pancreatic, and prostate cancers). Conclusions. Further investigations of E2F2 pathways are warranted for a clearer understanding of neoplastic processes and to identify novel pharmacological treatments.
Źródło:: OncoReview; 2023, 13, 2; 58-66
2450-6125
Pojawia się w:: OncoReview
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: Elevated cyclin E level in human clear cell renal cell carcinoma: possible causes and consequences
Autorzy:: Nauman, Alicja
Turowska, Olga
Poplawski, Piotr
Master, Adam
Tanski, Zbigniew
Puzianowska-Kuznicka, Monika
Powiązania:: https://bibliotekanauki.pl/articles/1041047.pdf
Data publikacji:: 2007
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: human clear cell renal cell carcinoma (ccRCC)
low molecular weight forms of cyclin E (LMW)
cyclin E
E2F1 transcription factor
gene for cyclin E (CCNE)
Opis:: The expression of cyclin E gene (CCNE) in relation to the expression of its major regulatory protein, E2F1, was examined in clear cell renal cell carcinomas (ccRCC). We show that the overexpression of E2F1 is accompanied by the significant increase of the mean amounts of cyclin E mRNA, as well as of total cyclin E protein and its low molecular weight forms in cancer tissues as compared to peritumoral controls. A significant increase of the mean amount of total cyclin E was found in peritumoral tissues compared to cancer-free kidneys, suggesting that cancer cells might secrete factors having a profound influence on the metabolism of neighbouring tissues. A significant, positive correlations between E2F1 protein and total cyclin E mRNA, as well as between E2F1 protein and full length cyclin E protein were found in cancer-free kidneys and in peritumoral tissues, but not in ccRCCs. The overexpression of cyclin E positively correlated with the decreasing degree of tumor differentiation, implicating a role for cyclin E in the promotion of tumorigenesis.
Źródło:: Acta Biochimica Polonica; 2007, 54, 3; 595-602
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: First Results from Verification of Psychometric Properties of D. Lennick’s and F. Kiel’s MCI Questionnaire for Measuring Moral Intelligence in Slovak Conditions
Autorzy:: Kaliská, Lada
Powiązania:: https://bibliotekanauki.pl/articles/2031760.pdf
Data publikacji:: 2014-09-30
Wydawca:: Wydawnictwo Adam Marszałek
Tematy:: moral intelligence
MCI questionnaire by D. Lennick and F. Kiel
reliability
factor structure
Opis:: The scientific study theoretically and empirically verifies the new construct of moral intelligence. Following its theoretical analysis, it offers the first findings from verification of psychometric properties of the tool for measuring moral intelligence, the Moral Competence Inventory (MCI) by D. Lennick and F. Kiel. Factor analysis of the Slovak version of the MCI proved the existence of 15 factors with acceptable variability, which, however, is not in agreement with 10 factors determined by the authors. Also, its insufficient reliability (in terms of internal consistency and stability of results in time (test-retest reliability estimate)) indicates that the current form of the MCI should be subjected to further scientific-research verification.
Źródło:: The New Educational Review; 2014, 37; 257-268
1732-6729
Pojawia się w:: The New Educational Review
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Effect of weave parameters on the air resistance of woven fabrics
Barwienie materiałów bawełnianych przy zastosowaniu naturalnego barwnika wyekstrahowanego z liści henny i właściwości zabezpieczające przed UV wybarwionych materiałów
Autorzy:: Vimal, J. T.
Murugan, R.
Subramaniam, V.
Powiązania:: https://bibliotekanauki.pl/articles/234382.pdf
Data publikacji:: 2016
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:: doubled yarns
Crossing Floating Factor
CFF
Floating Yarn Factor
FYF
Fabric Firmness Factor
FFF
thickness
mass per square meter
air resistance
proces tkania
długość przeplotu
gęstość tkaniny
grubość tkaniny
porowatość tkaniny
test KES-F-API
Opis:: W pracy badano wpływ parametrów procesu tkania na oporność dla przepływu powietrza. Badano wpływ parametrów związanych z długością przeplotu, gęstością tkaniny i innymi czynnikami takimi jak: masa powierzchniowa, grubość i porowatość. Wyprodukowano serię bawełnianych tkanin o 11 różnych splotach z włókien osnowy i wątku posiadających te same masy liniowe. Przepuszczalność powietrza badano za pomocą standardowego testu KES-F-API. Analiza uzyskanych wyników wskazuje na silne korelacje pomiędzy współczynnikami związanymi z długością przeplotu, gęstością i grubością tkaniny.
Źródło:: Fibres & Textiles in Eastern Europe; 2016, 1 (115); 67-72
1230-3666
2300-7354
Pojawia się w:: Fibres & Textiles in Eastern Europe
Dostawca treści:: Biblioteka Nauki