Autor: Stankiewicz, T. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: A stable density approach to probe selection for a custom aCGH design
Autorzy:: Gambin, T.
Stankiewicz, P.
Gambin, A.
Powiązania:: https://bibliotekanauki.pl/articles/81185.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: genomic region
probe
copy number alternation
comparative genomic hybridization
human genome
microarray
wide range application
gene expression
methylation
binding protein
Źródło:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2011, 92, 3
0860-7796
Pojawia się w:: BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of Compressed Data Stream Content in HEVC Video Encoder
Autorzy:: Stankowski, J.
Karwowski, D.
Grajek, T.
Wegner, K.
Siast, J.
Klimaszewski, K.
Stankiewicz, O.
Domański, M.
Powiązania:: https://bibliotekanauki.pl/articles/227246.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: HEVC
video compression
compressed data stream analysis
Opis:: In this paper, a detailed analysis of the content of the bitstream, produced by the HEVC video encoder is presented. With the use of the HM 10.0 reference software the following statistics were investigated: 1) the amount of data in the encoded stream related to individual frame types, 2) the relationship between the value of the QP and the size of the bitstream at the output of the encoder, 3) contribution of individual types of data to I and B frames. The above mentioned aspects have been thoroughly explored for a wide range of target bitrates. The obtained results became the basis for highlighting guidelines that allow for efficient bitrate control in the HEVC encoder.
Źródło:: International Journal of Electronics and Telecommunications; 2015, 61, 2; 121-127
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Bacterial contamination of boar semen and its relationship to sperm quality preserved in commercial extender containing gentamicin sulfate
Autorzy:: Gaczarzewicz, D.
Udala, J.
Piasecka, M.
Blaszczyk, B.
Stankiewicz, T.
Powiązania:: https://bibliotekanauki.pl/articles/30463.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: This study was designed to determine the degree and type of bacterial contamination in boar semen (79 ejaculates from Large White and Landrace boars) and its consequences for sperm quality during storage (27 extended semen samples, 16°C for five days) under practical conditions of artificial insemination (AI). The results revealed the presence of aerobic bacteria in 99% of the ejaculates (from 80 to 370 ×106 colony-forming units/mL). Most of the ejaculates contained two or three bacterial contaminants, while the Staphylococcus, Streptococcus, and Pseudomonas bacterial genera were most frequently isolated. Also detected were Enterobacter spp., Bacillus spp., Proteus spp., Escherichia coli, P. fluorescens, and P. aeruginosa. In general, the growth of certain bacterial types isolated prior to semen processing (Enterobacter spp., E. coli, P. fluorescens, and P. aeruginosa) was not discovered on different days of storage, but fluctuations (with a tendency towards increases) were found in the frequencies of Bacillus spp., Pseudomonas spp., and Staphylococcus spp. isolates up to the end of storage. Semen preserved for five days exhibited decreases in sperm motility and increases in the average number of total aerobic bacteria; this was associated with sperm agglutination, plasma membrane disruption, and acrosome damage. We inferred that, due to the different degrees and types of bacterial contaminants in the boar ejaculates, the inhibitory activity of some antimicrobial agents used in swine extenders (such as gentamicin sulfate) may be limited. Because such agents can contribute to the overgrowth of certain aerobic bacteria and a reduction in the quality of stored semen, procedures with high standards of hygiene and microbiological control should be used when processing boar semen.
Źródło:: Polish Journal of Veterinary Sciences; 2016, 19, 3
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Badanie ultrasonograficzne ciąży u kozy domowej (Capra hircus) ‒ przegląd
Ultrasound examination of pregnancy in the domestic goat (Capra hircus) ‒ a review
Autorzy:: Wojtasiak, N.
Stankiewicz, T.
Udala, J.
Powiązania:: https://bibliotekanauki.pl/articles/2119699.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Zootechniczne
Tematy:: badanie ultrasonograficzne
fetometria zarodkowo-płodowa
ciąża
koza
Opis:: Zastosowanie badania ultrasonograficznego (USG) dla określenia fetometrii zarodkowo- -płodowej znalazło szerokie zastosowanie w zarządzaniu reprodukcją kóz. Tkanki, narządy zarodka/płodu są mierzone i oceniane w celu oszacowania wieku ciążowego. Do przeprowa- dzenia badania USG wykorzystuje się sondy transrektalne, transabdominalne i transwaginalne. Postęp technologiczny, zwłaszcza w odniesieniu do rozdzielczości obrazu USG, umoż- liwia precyzyjną wizualizację struktur zarodkowo-płodowych u kóz. W artykule dokonano przeglądu stosowanych pomiarów fetometrycznych w badaniu ultrasonograficznym ciąży u kóz. Wykonanie tego badania w poszczególnych okresach ciąży umożliwia skuteczne mo- nitorowanie wzrostu i rozwoju zarodka/płodu. Oprócz pomiarów struktur zarodkowo-płodowych istotne są również pomiary struktur płodowo-matczynych, takich jak łożyszcza i pępowina. Podkreślono także znaczenie ultrasonografii w monitorowaniu ciąży kóz, zarówno prawidło- wej, jak i patologicznej.
Źródło:: Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego; 2020, 16, 2; 65-78
1733-7305
Pojawia się w:: Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Biometric speech signal processing in a system with digital signal processor
Autorzy:: Marciniak, T.
Weychan, R.
Stankiewicz, A.
Dąbrowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/200794.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: biometry
speech processing
digital signal processor
Gaussian mixture models
vector quantization
Opis:: This paper presents an analysis of issues related to the fixed-point implementation of a speech signal applied to biometric purposes. For preparing the system for automatic speaker identification and for experimental tests we have used the Matlab computing environment and the development software for Texas Instruments digital signal processors, namely the Code Composer Studio (CCS). The tested speech signals have been processed with the TMS320C5515 processor. The paper examines limitations associated with operation of the realized embedded system, demonstrates advantages and disadvantages of the technique of automatic software conversion from Matlab to the CCS and shows the impact of the fixed-point representation on the speech identification effectiveness.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 589-594
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Circannual changes in serum concentrations of thyroxine, calcitonin and parathormone in immature and mature red deer females (Cervus elaphus)
Autorzy:: Kuba, J.
Blaszczyk, B.
Stankiewicz, T.
Kwita, E.
Udala, J.
Powiązania:: https://bibliotekanauki.pl/articles/31677.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: The aim of this study was to determine circannual changes in the serum concentrations of thyroxine, calcitonin and parathormone in mature and immature red deer females. Blood samples from 8 hinds were collected monthly for 26 months. Secretions of thyroxine and calcitonin showed circannual rhythms with significantly higher levels in the immature hinds compared to the mature animals (p<0.05). For thyroxine, the concentration was higher in the winter/spring period than in summer/autumn (p<0.05), while for calcitonin the concentration profile was the opposite (p<0.05). The concentration of parathormone was significantly higher in summer/autumn that in the other months of the experiment (p<0.01). These results may indicate that the hormones investigated may be involved in the regulation of seasonal reproductive activity and in processes contributing to entering puberty in red deer females.
Źródło:: Polish Journal of Veterinary Sciences; 2015, 18, 3
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Denoising methods for improving automatic segmentation in OCT images of human eye
Autorzy:: Stankiewicz, A.
Marciniak, T.
Dąbrowski, A.
Stopa, M.
Rakowicz, P.
Marciniak, E.
Powiązania:: https://bibliotekanauki.pl/articles/201133.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: optical coherence tomography (OCT)
image denoising
image segmentation
anisotropic diffusion
wavelet thresholding
koherentna tomografia optyczna
OCT
segmentacja obrazu
dyfuzja anizotropowa
Opis:: This paper presents analysis of selected noise reduction methods used in optical coherence tomography (OCT) retina images (the socalled B-scans). The tested algorithms include median and averaging filtering, anisotropic diffusion, soft wavelet thresholding, and multiframe wavelet thresholding. Precision of the denoising process was evaluated based on the results of automated retina layers segmentation, since this stage (vital for ophthalmic diagnosis) is strongly dependent on the image quality. Experiments were conducted with a set of 3D low quality scans obtained from 10 healthy patients and 10 patients with vitreoretinal pathologies. Influence of each method on the automatic image segmentation for both groups of patients is thoroughly described. Manual annotations of investigated retina layers provided by ophthalmology experts served as reference data for evaluation of the segmentation algorithm.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 1; 71-78
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Evaluation of selenium status and its distribution in organs of free living foxes (Vulpes vulpes) from an Se deficient area
Autorzy:: Pilarczyk, B.
Pilarczyk, R.
Tomza-Marciniak, A.
Hendzel, D.
Bakowska, M.
Stankiewicz, T.
Powiązania:: https://bibliotekanauki.pl/articles/31746.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: The objective of the study was to determine selenium status and its distribution in the organs of free living foxes from selenium deficient areas of north-western Poland. Samples of organs harvested from 40 foxes shot during the 2008-2009 hunting seasons served as experimental material. Selenium concentration in the organs was determined spectrofluorometrically. Selenium distribution in tissues depends largely on its dietary content. Our study indicated that concentrations of selenium in the examined organs followed the order: kidney>liver>spleen>lung>heart and kidneys were the organ with the highest retention of this element. Mean selenium concentration in fox kidneys was 0.60 ± 0.15 μg/g wet weight. Several times less selenium on average was found in the liver (0.27 ± 0.09 μg/g w.w.), lungs (0.17 ± 0.06 μg/g w.w.), spleen (0.19 ± 0.06 μg/g w.w.) and heart (0.13 ± 0.05 μg/g w.w.). All the animals studied were deficient in selenium.
Źródło:: Polish Journal of Veterinary Sciences; 2011, 14, 3
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: HEVC Encoding Assisted with Noise Reduction
Autorzy:: Stankiewicz, O.
Wegner, K.
Karwowski, D.
Stankowski, J.
Klimaszewski, K.
Grajek, T.
Powiązania:: https://bibliotekanauki.pl/articles/226110.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: HEVC encoding
encoder control
model selection optimization
noise reduction
Opis:: Optimization of encoding process in video compression is an important research problem, especially in the case of modern, sophisticated compression technologies. In this paper, we consider HEVC, for which a novel method for selection of the encoding modes is proposed. By the encoding modes we mean e.g. coding block structure, prediction types and motion vectors. The proposed selection is done basing on noise-reduced version of the input sequence, while the information about the video itself, e.g. transform coefficients, is coded basing on the unaltered input. The proposed method involves encoding of two versions of the input sequence. Further, we show realization proving that the complexity is only negligibly higher than complexity of a single encoding. The proposal has been implemented in HEVC reference software from MPEG and tested experimentally. The results show that the proposal provides up to 1.5% bitrate reduction while preserving the same quality of a decoded video.
Źródło:: International Journal of Electronics and Telecommunications; 2018, 64, 3; 285-292
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Hybrid locomotives overview of construction solutions
Autorzy:: Konarzewski, M.
Niezgoda, T.
Stankiewicz, M.
Szurgott, P.
Powiązania:: https://bibliotekanauki.pl/articles/245761.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: hybrid powertrain
hybrid locomotive
diesel-electric locomotive
railway vehicles
Opis:: Nowadays, transportation becomes a significant source, apart from factories and power plants, of air pollution. Therefore, due to legal restrictions on the emission of noxious gases, other power sources for vehicles are necessary. Some of these power sources allow replacement of the internal combustion engine completely, whereas the other ones only support the engine operation. Hence, a hybrid powertrain – alternative to the drivetrain equipped with an internal combustion engine only – is increasingly being used. The hybrid powertrain was mostly applied in cars and buses but recently it has been also used in railway vehicles such as locomotives and multiple units. The paper presents a shortened and brief overview of construction solutions of selected hybrid locomotives. A list of the applied hybrid drive systems as well as the basic data and properties are provided. The most important variants of vehicles are compared. The presented material allows identification of the development trends in the considered area. The hybrid locomotive usually uses an onboard rechargeable energy storage system, placed between the power source and the traction transmission system connected to the wheelsets. Modification of a classic diesel-electric locomotives is a relatively simple procedure since they have all the components of a series hybrid transmission except the storage battery. Therefore, the existing and operated diesel-electric locomotives can be modified to increase their efficiency and reduce operating costs and emissions.
Źródło:: Journal of KONES; 2013, 20, 1; 127-134
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Improving Segmentation of 3D Retina Layers Based on Graph Theory Approach for Low Quality OCT Images
Autorzy:: Stankiewicz, A.
Marciniak, T.
Dąbrowski, A.
Stopa, M.
Rakowicz, P.
Marciniak, E.
Powiązania:: https://bibliotekanauki.pl/articles/221548.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Optical Coherence Tomography (OCT)
segmentation of retinal layers
image segmentation
graph theory
Opis:: This paper presents signal processing aspects for automatic segmentation of retinal layers of the human eye. The paper draws attention to the problems that occur during the computer image processing of images obtained with the use of the Spectral Domain Optical Coherence Tomography (SD OCT). Accuracy of the retinal layer segmentation for a set of typical 3D scans with a rather low quality was shown. Some possible ways to improve quality of the final results are pointed out. The experimental studies were performed using the so-called B-scans obtained with the OCT Copernicus HR device.
Źródło:: Metrology and Measurement Systems; 2016, 23, 2; 269-280
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Indentification of three different chromosomal additions by chromosome painting using fluorescence in situ hybridization [FISH] technique
Autorzy:: Bocian, E
Stankiewicz, P
Stanczak, H
Obersztyn, E
Mazurczak, T
Powiązania:: https://bibliotekanauki.pl/articles/2047283.pdf
Data publikacji:: 1996
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: chromosomal addition
fluorescence in situ hybridization method
hybridization
chromosome painting
cytogenetics
Opis:: Fluorescence in situ hybridization (FISH) is a very useful method for assessing chromosome rearrangements. When neither banding pattern nor clinical symptoms are sufficient to determine the origin of additional chromosomal fragment, FISH with multiple chromosome-specific libraries (chromosome painting), allows to solve this diagnostic problem rapidly. Three chromosomal additions, 7q+, 13p+ and 22q+, found in routine cytogenetic studies performed in children with phenotypic abnormalities were analysed using FISH. This technique documented the origin of the extra material to be derived from chromosome 16[der(7)t(7; 16)(q36.3;p 13.11)], 18[der(13)t(13; 18)(p12;q 12.2)] and 22[dup(22)(q11.2q13.1)], respectively. In two cases the abnormality arose de novo, while in the third case the product of translocation t(13;18) was maternal by origin. It was present in 30% of mother's lymphocytes, and in 70% of them a balanced Robertsonian translocation t(13q;15q) was found. In the presented cases the chromosome analysis with both traditional banding and chromosome painting techniques, allowed to establish final clinical diagnosis.
Źródło:: Journal of Applied Genetics; 1996, 37, 2; 197-204
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Justification for applying expedient/battle damage repairs of weapon systems in combat operations
Uzasadnienie stosowania systemu doraźnych napraw bojowych sprzętu wojskowego podczas operacji wojskowych
Autorzy:: Smal, T.
Stankiewicz, G.
Powiązania:: https://bibliotekanauki.pl/articles/347659.pdf
Data publikacji:: 2012
Wydawca:: Akademia Wojsk Lądowych imienia generała Tadeusza Kościuszki
Tematy:: logistyka
wsparcie działań bojowych
naprawy doraźne
utrzymanie systemów uzbrojenia
logistics
combat service support
battlefield maintenance
battle damage repair
Opis:: Every armed conflict is connected with numerous losses in the equipment. Modern armies are still looking for new solutions allowing them to improve the possibilities of the battlefield maintenance system, which will be tailored to the conditions of the contemporary battlefield. One of the solutions is the ER/BDR - expedient repairs and battle damage repairs of weapon systems. The ER/BDR allows one to maintain the suitability of combat vehicles, especially mobility or an ability to provide fire during combat operations. What is more, ER/BDR operations can be conducted directly in the place of damage without the necessity of evacuation to maintenance collection points. In the article the authors present advantages and a justification for applying this solution, which is based on the analysis of theoretical calculations, a few historical data and a simulation they conducted.
Każdy konflikt zbrojny wiąże się z licznymi stratami w uzbrojeniu i sprzęcie wojskowym (UiSW). Nowoczesne armie stale poszukują nowych rozwiązań, które pozwolą na rozwijanie możliwości prowadzenia napraw uszkodzonych systemów uzbrojenia w warunkach polowych oraz będą dostosowane do potrzeb współczesnego pola walki. Jednym z takich rozwiązań jest system doraźnych (improwizowanych) napraw polowych systemów uzbrojenia. Pozwala on utrzymać zdatność UiSW, a zwłaszcza jego mobilność oraz zdolność do prowadzenia ognia w czasie działań bojowych. Co więcej, naprawy ER/BDR mogą być prowadzone bezpośrednio w miejscu uszkodzenia, bez konieczności prowadzenia jego ewakuacji do punktów zbiórki uszkodzonego sprzętu. Oznacza to, że uszkodzone UiSW może znacznie szybciej powrócić do walki. W artykule autorzy prezentują zalety tego rozwiązania, które zostały oparte na analizie teoretycznych kalkulacji, wybranych przykładach i danych historycznych oraz przeprowadzonej symulacji zdarzeń taktyczno-logistycznych.
Źródło:: Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki; 2012, 4; 50-57
1731-8157
Pojawia się w:: Zeszyty Naukowe / Wyższa Szkoła Oficerska Wojsk Lądowych im. gen. T. Kościuszki
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Molecular versus classical cytogenetics - evaluation of 20 Prader-Willi syndrome patients
Autorzy:: Stankiewicz, P
Lebiocka, J
Szpecht-Potocka, A
Bocian, E
Stanczak, H
Obersztyn, E
Mazurczak, T
Powiązania:: https://bibliotekanauki.pl/articles/2047150.pdf
Data publikacji:: 1997
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: chromosomal deletion
in situ
patient
hybridization
fluorescence
cytogenetics
chromosome region
Prader-Willi syndrome
Opis:: Prader-Willi syndrome (PWS) is a developmental disorder caused by a deficiency of paternal contribution of the chromosome region 15q11.2-q13 arising from differently sized deletions, maternal disomy, or rarely imprinting mutations. We have analyzed 20 PWS patients using combined cytogenetic high resolution technique (HRT), fluorescence in situ hybridization (FISH) and molecular studies to identify parental origin (uniparental disomy) or molecular defect (deletion) of the Prader-Willi region. Lack of a paternal copy of 15q11.2-q13 resulting from its deletion was found in 16 patients. Using high resolution GTG banding on prometaphase chromosomes, deletion in the 15q11.2-q13 region was detected in only 8 patients. Application of FISH with different sets of PWS specific unique sequence probes (D15S11, SNRPN, D15S10, GABRß3) revealed microdeletions in 12 patients. In 12 out of 20 cases FISH confirmed HRT studies, while in 8 cases inconsistent results were obtained. No discrepancies between results of FISH and molecular studies were found, although the latter had a higher sensitivity. We conclude that FISH appears to be a rapid and reliable method of microdeletion identification and should be performed as a method of choice in cytogenetic diagnosis of Prader-Willi syndrome.
Źródło:: Journal of Applied Genetics; 1997, 38, 2; 217-226
1234-1983
Pojawia się w:: Journal of Applied Genetics
Dostawca treści:: Biblioteka Nauki