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Wyświetlanie 1-15 z 32
Tytuł:
On the insertion of Darboux functions
Autorzy:
Maliszewski, Aleksander
Powiązania:
https://bibliotekanauki.pl/articles/1205354.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Darboux function
insertion of functions
Opis:
The main goal of this paper is to characterize the family of all functions f which satisfy the following condition: whenever g is a Darboux function and f < g on ℝ there is a Darboux function h such that f < h < g on ℝ.
Źródło:
Fundamenta Mathematicae; 1998, 156, 3; 197-209
0016-2736
Pojawia się w:
Fundamenta Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of mismatches and insertions on discrimination accuracy of nucleic acid probes
Autorzy:
Piao, Xianyu
Sun, Liancheng
Zhang, Tianbiao
Gan, Youlin
Guan, Yifu
Powiązania:
https://bibliotekanauki.pl/articles/1040677.pdf
Data publikacji:
2008
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
insertion
mismatch
melting temperature
hybridization stability
Opis:
Effective discrimination of non-complementary nucleotides is an important factor to ensure the accuracy of hybridization-based nucleic acid analyses. The current study investigates the effects of the chemical nature, the positions, the numbers, and the cooperative behavior of mismatches as well as insertions on 20-mer and 30-mer duplexes. We observed the hybridization stability trend affected by mismatches: G:T ≈ G:G > G:A > A:A ≈ T:T > A:C ≈ T:C > C:C. The experimental data show that mismatches at the center of the oligonucleotide probes have a more profound destabilizing effect on the hybridization stability than those at either ends. Insertions also demonstrate a similar destabilizing effect as mismatches. These results provide useful information for designing DNA microarray nucleotide probes and for improving the discrimination accuracy of hybridization-based detections.
Źródło:
Acta Biochimica Polonica; 2008, 55, 4; 713-720
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
'The mother of all continued fractions'
Autorzy:
Dajani, Karma
Kraaikamp, Cor
Powiązania:
https://bibliotekanauki.pl/articles/965726.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
insertion
ergodic theory
continued fractions
singularization
Opis:
We give the relationship between regular continued fractions and Lehner fractions, using a procedure known as insertion}. Starting from the regular continued fraction expansion of any real irrational x, when the maximal number of insertions is applied one obtains the Lehner fraction of x. Insertions (and singularizations) show how these (and other) continued fraction expansions are related. We also investigate the relation between Lehner fractions and the Farey expansion (also known as the full continued fraction), and obtain the ergodic system underlying the Farey expansion.
Źródło:
Colloquium Mathematicum; 2000, 84/85, 1; 109-123
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental analysis of insertion torques and forces of threaded and press-fit acetabular cups by means of ex vivo and in vivo measurements
Autorzy:
Vogel, D.
Rathay, A.
Teufel, S.
Ellenrieder, M.
Zietz, C.
Sander, M.
Bader, R.
Powiązania:
https://bibliotekanauki.pl/articles/307285.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
panewka
gwintowanie
kość
kość syntetyczna
insertion force
insertion torque
acetabular cup
press-fit
threaded
synthetic bone
Opis:
In THA sufficient primary implant stability is the precondition for successful secondary stability. Industrial foams of different densities have been used for primary stability investigations. The aim of this study was to analyse and compare the insertion behaviour of threaded and press-fit cups in vivo and ex vivo using bone substitutes with various densities. Methods: Two threaded (Bicon Plus®, Trident® TC) and one press-fit cup (Trident PSL®) were inserted by orthopaedic surgeons (S1, S2) into 10, 20 and 31 pcf blocks using modified surgical instruments allowing measurements of the insertion forces and torques. Furthermore, the insertion behaviour of two cups were analysed intraoperatively. Results:Torques for the threaded cups increased while bone substitute density increased. Maximum insertion torques were observed for S2 with 102 Nm for the Bicon Plus® in 20 pcf blocks and 77 Nm for the Trident® TC in 31 pcf blocks which compares to the in vivo measurement (85 Nm). The average insertion forces for the press-fit cup varied from 5.2-6.8 kN (S1) and 7.2-11.5 kN (S2) ex vivo. Intraoperatively an average insertion force of 8.0 kN was determined. Conclusions: Implantation behaviour was influenced by acetabular cup design, bone substitute and experience of the surgeon. No specific density of bone substitute could be favoured for ex vivo investigations on the implantation behaviour of acetabular cups. The synthetic bone blocks of high density (31 pcf) led to problems regarding cup orientation and seating. Therefore, bone substitutes used should be critically scrutinized in terms of the comparability to the in vivo situation.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 3; 155-163
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mycobacterium tuberculosis - the 10 years of epidemiological and diagnostics studies
Autorzy:
Boruń-Popławska, Marta
Sajduda, Anna
Brzostek, Anna
Dziadek, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/764949.pdf
Data publikacji:
2005
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Mycobacterium tuberculosis
insertion sequences
PCR
epidemiology
diagnosis
Opis:
Tuberculosis (ТВ) is the main bacterial pathogen that causes more deaths than AIDS, malaria and all infectious diseases. The unusual long doubling time (about 24h), highly hydrophobic cell envelope resistant to chemical lysis was the reason to delay the molecular study of this bacteria. Fifteen years ago, we did not have any molecular tools and methods for genetic manipulation or isolation and analysis of intracellular protein and nucleic acids. Today we have many useful shuttle or integration vectors for basic study of mycobacteria. The full sequence of M. tuberculosis genome is already known. At the present time the diagnosis of tuberculosis is supported with fast-culture system BACTEC and molecular techniques based on PCR and DNA hybridization. The mechanisms of resistance to antituberculosis drugs were described, and first identification of resistance profile is available by using PCR and sequencing or real time PCR methods. In our group in the Center for Microbiology and Virology Polish Academy of Sciences and in the Dept, of Genetics of Microorganisms, University Łódź we have characterized new insertion sequences from M. tuberculosis complex- 18990 and IS1607. In diagnostic studies we have proposed the DIG-PCR ELISA assay as a reliable, specific and sensitive test to identify M. tuberculosis directly in clinical samples. We have performed wide epidemiological studies of M. tuberculosis strains isolated from Polish ТВ patients including drug - and multidrug - resistant strains. Finally we identified the most frequently present mutations responsible for drug resistance of polish clinical isolates of M. tuberculosis.
Źródło:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica; 2005, 2
1730-2366
2083-8484
Pojawia się w:
Acta Universitatis Lodziensis. Folia Biologica et Oecologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-introduction of urethral foreign bodies in adolescent boys: a rising problem
Wprowadzanie ciał obcych do cewki moczowej przez nastoletnich chłopców: narastający problem
Autorzy:
Warchoł, Stanisław
Wolski, Marek
Jaworski-Martycz, Aleksander
Dudek-Warchoł, Teresa
Powiązania:
https://bibliotekanauki.pl/articles/1034873.pdf
Data publikacji:
2018
Wydawca:
Medical Communications
Tematy:
adolescents
foreign body
magnets
self-insertion
urinary tract
Opis:
There has been an increase in reports of self-introduced urethrovesical foreign bodies, but they are still considered to be rare in children. A special type of foreign bodies are magnetic bodies inserted into the lower urinary tract – a phenomenon which clearly corresponds with an increase in paediatric magnet-related foreign bodies insertion requiring emergency care. We present two adolescent boys with voiding difficulty as a leading symptom following self-introduction of numerous magnetic beads (in the first case) and eyebrow tweezers (in the second case) treated during the last 3 months. Magnetic beads had to be removed operatively, eyebrow tweezers were removed from urethra manually. Our observations confirm that in the differential diagnosis of lower urinary tract symptoms especially in adolescents, the presence of foreign bodies should be taken into consideration.
W piśmiennictwie wzrasta liczba opisywanych przypadków wprowadzania ciał obcych do układu moczowego, jakkolwiek zjawisko to nadal oceniane jest jako rzadko występujące u dzieci. Szczególny typ przedmiotów wprowadzanych do cewki moczowej, również w populacji dziecięcej, stanowią magnetyczne ciała obce, których obecność wymaga nagłej interwencji. W artykule przedstawiono dwa przypadki nastoletnich chłopców leczonych z powodu narastających zaburzeń oddawania moczu wtórnych do wprowadzenia ciał obcych do cewki moczowej – licznych kulek magnetycznych u pierwszego pacjenta i pęsety do brwi u drugiego. Kulki usunięto operacyjnie, pęsetę udało się usunąć manualnie. Opisane przypadki potwierdzają, że w diagnostyce różnicowej objawów ze strony dolnych dróg moczowych powinno się uwzględniać obecność ciała obcego wprowadzonego do cewki lub pęcherza.
Źródło:
Pediatria i Medycyna Rodzinna; 2018, 14, 4; 431-434
1734-1531
2451-0742
Pojawia się w:
Pediatria i Medycyna Rodzinna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An Analysis of Students’ Knowledge in Spelling: A Case of a Technical University in Ghana
Autorzy:
Atatsi, Eli Ayawo
Amoakohene, Benjamin
Powiązania:
https://bibliotekanauki.pl/articles/513808.pdf
Data publikacji:
2019-06-30
Wydawca:
Akademia Pedagogiki Specjalnej. Language and Society Research Committee
Tematy:
Spelling errors
Transposition errors
Insertion errors
Substitution errors
Opis:
High proficiency level in spelling is considered to be an important literally skill writers need to be able to establish shared meaning with their readers. However, the Applied Linguistic literature reveals that spelling errors dominantly plaque the essays of students who speak English as Second Language (ESL). In lieu with this, this study sheds light on students’ knowledge in spelling in a Technical University in Ghana. The participants for the study involve 275 students who were randomly selected from three academic levels. The random sampling procedure was further used by the researchers to select 30 English words out of 50 words that have been compiled by the Communicative Skills Unit as the most consistent misspelled words in the written English essays of students of the Technical University over a period of four years. The respondents were further tested on how well they could spell those words. The findings confirm three main types of spelling errors: “insertion errors”, “substitution errors” and “transposition errors”. The findings further reveal that the students’ inability to correctly spell most of the words that were dictated to them is a result of their unfamiliarity with the words, their inability to account for the right pronunciation associated with those words that were dictated to them as well as the failure of students to edit their work after the spelling exercise. It is also confirmed that the academic levels of the students do not have a significant influence on their performance in the spelling.
Źródło:
Language, Discourse & Society; 2019, 7, 1; 239-257
2239-4192
Pojawia się w:
Language, Discourse & Society
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Demonstration of a high extinction ratio TiN-based TM-pass waveguide polarizer
Autorzy:
Zhao, Zhuan
Santi, Giovanni
Corso, Alain Jody
Pelizzo, Maria Guglielmina
Powiązania:
https://bibliotekanauki.pl/articles/2172856.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
plasmonic waveguide polarizer
extinction ratio
insertion loss
broadband
Opis:
A high extinction ratio transverse magnetic (TM)-pass plasmonic waveguide polarizer has been designed and optimized. This device exploits two parallel TiN strips embedded in a silicon dioxide cladding to cut off the transverse electric (TE) polarization state, which is either reflected or absorbed, while the TM mode can pass through the main silicon waveguide with significant low losses. Given a device of 5 μm length, an extinction ratio as high as 60.7 dB and an insertion loss of 2.23 dB were achieved at the target wavelength of 1.55 μm. To our knowledge, this extinction ratio is one of the highest values ever reported. In the wavelength of 1.45–1.59 μm, the proposed device provides an optical bandwidth of 140 nm for an extinction ratio more than 30 dB and an insertion loss less than 3 dB. This device is relatively simple and is easier to be fabricated than other architectures that are found in the literature.
Źródło:
Optica Applicata; 2022, 52, 4; 585--598
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation between the shape of substitution ducts and insertion loss of silencers
Autorzy:
Wójciak, Kamil
Kopania, Joanna Maria
Powiązania:
https://bibliotekanauki.pl/articles/2202426.pdf
Data publikacji:
2022
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
silencer
insertion loss
aeroacoustics
tłumik
strata wtrąceniowa
aeroakustyka
Opis:
Silencers are typical devices used for the reduction of noise in ventilation systems, which can be found in almost all industrial, service or residential installations. Determination of acoustic parameters for specific HVAC devices, like silencers, is within the scope of specialised laboratories. With the silencers, two main parameters should be taken care of: the first one is sound attenuation and the second one is pressure losses. In the presented paper, the focus is on measurement methods described by standard ISO 7235:2009. This standard specifies the methods for determining the sound power level of the flow noise generated by silencers, the total pressure of silencers and the insertion loss of silencers with and without airflow by using the substitute object. In this work, we focused on the correlation between the shape of the substitution duct and its acoustic parameters and its relation to this with the final result of insertion loss of a silencer.
Źródło:
Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022212
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Direct Trocar Insertion with Elevation of the Rectus Sheath in Bariatric Surgery: A Novel Technique
Autorzy:
Habibi, Mani
Seyit, Hakan
Kones, Osman
Kartal, Bahadir
Alis, Halil
Powiązania:
https://bibliotekanauki.pl/articles/1393107.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
bariatric surgery
direct trocar insertion
rectus sheath elevation
Opis:
Introduction. Initial trocar entry, the first step in laparoscopic surgery, is associated with several complications. In morbidly obese patients, initial trocar placement is associated with a greater number of complications compared to non-obese patients. Materials and Surgical Technique. In this study, we describe our use of an initial trocar entry technique which is direct trocar insertion with elevation of the rectus sheath by a single Backhaus towel clamp and we would like to evaluate the sa fety and efficacy of its administration in bariatric surgery. Discussion. Our results indicate that gaining initial trocar entry using our technique leads to successful laparoscopic bariatric surgery. Our technique is a safe, effective, and reliable first step in successful laparoscopic surgery for almost all patients, and is only contraindicated in patients with severe hepatomegaly.
Źródło:
Polish Journal of Surgery; 2017, 89, 6; 23-25
0032-373X
2299-2847
Pojawia się w:
Polish Journal of Surgery
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Improvement of Sound Insulation Through Double-Panel Structure by Using Hybrid Local Resonator Array
Autorzy:
Ri, Kyong-Su
Kim, Myong-Jin
Son-U, Se-Hyon
Powiązania:
https://bibliotekanauki.pl/articles/31339917.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
sound insulation
local resonance
insertion loss
sonic crystal
Opis:
In this paper, we present one approach to improve the soundproofing performance of the double-panel structure (DPS) in the entire audible frequencies, in which two kinds of local resonances, the breathing-type resonance and the Helmholtz resonance, are combined. The thin ring resonator row and slit-type resonator (Helmholtz resonator) row are inserted between two panels of DPS together. Overlapping of the band gaps due to the individual resonances gives a wide and high band gap of sound transmission in the low frequency range. At the same time, the Bragg-type band gap is created by the structural periodicity of the scatterers in the high audible frequency range. In addition, the number of scatterer rows and the filling factor are investigated with regard to the sound insulation of DPS with sonic crystals (SCs). Consequently, the hybrid SC has the potential of increasing the soundproofing performance of DPS in the audible frequency range above 1 kHz by about 15 dB on average compared to DPS filled only with glass wool between two panels, while decreasing the total thickness and mass compared to the counterparts with the other type of local resonant sonic crystal.
Źródło:
Archives of Acoustics; 2023, 48, 1; 63-70
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modernisation of the Polish Air Force command and control system
Autorzy:
Grenda, B.
Powiązania:
https://bibliotekanauki.pl/articles/120571.pdf
Data publikacji:
2015
Wydawca:
Akademia Sztuki Wojennej
Tematy:
siły powietrzne
dowodzenie
kontrola
air force
command
control
technology insertion
Opis:
The article provides a brief introduction to the achievements of the Polish Air Force (POL AF) in the fields of command and control. The author elaborates on the achievement and approaches for development of the POL AF AIR command and control (C2) system. The activities related to the implementation of the Polish Air Force C2 system modernisation projects and NATO interoperability are thoroughly presented.
Źródło:
Zeszyty Naukowe AON; 2015, 4(101); 5-11
0867-2245
Pojawia się w:
Zeszyty Naukowe AON
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomechanical simulation of needle insertion into cornea based on distortion energy failure criterion
Autorzy:
Su, P.
Yang, Y.
Huang, L.
Powiązania:
https://bibliotekanauki.pl/articles/306549.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
rogówka
biomechanika
symulacja matematyczna
cornea
biomechanics
insertion force
suture
mathematical simulation
Opis:
Purpose: This paper is mainly about biomechanical behavior of needle insertion into cornea, and proposes a failure criterion to simulate the insertion process which has attracted considerable attention due to its importance for the minimally invasive treatment. Methods: In the process of needle insertion into cornea, tiny and complex insertion force is generated due to contact between needle and soft tissue. Based on the distortion energy theory, there is proposed a failure criterion of corneal material that can solve contact problem between rigid body and biological tissue in insertion simulation, where Cauchy stress of corneal material is the key to numerical calculation. A finite element model of in vivo cornea is built, and the cornea constrained by sclera is simplified to two layers containing epithelium and stroma. Considering the hyper-viscoelastic property of corneal material, insertion simulation is carried out. Results: By insertion experiment, the insertion force increases with insertion depth accompanying obvious fluctuations. Different insertion forces are generated at different speeds. The punctured locations are obvious in the force-displacement curves. The results of insertion simulation are generally consistent with experimental data. Maps of von Mises stress reflect the tissue injury of the cornea during insertion process, and punctured status corresponds to the point in the curves. Conclusions: The ability of this study to reproduce the behavior of needle insertion into cornea opens a promising perspective for the control of robotic surgery operation as well as the real-time simulation of corneal suture surgery.
Źródło:
Acta of Bioengineering and Biomechanics; 2016, 18, 1; 65-75
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Insertion algorithms to solve the resource-constrained multi-stage project scheduling problem with discounted cash flow maximization
Autorzy:
Klimek, M.
Powiązania:
https://bibliotekanauki.pl/articles/406997.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
insertion algorithms
discounted cash flow
resource-constrained project scheduling
priority rules
Opis:
The article presents the problem of scheduling a multi-stage project with limited availability of resources with the discounted cash flow maximization criterion from the perspective of a contractor. The contractor’s cash outflows are associated with the execution of activities. The client’s payments (cash inflows for the contractor) are performed after completing the agreed project’s stages. The proposed solution for this problem is the use of insertion algorithms. Schedules are generated using forward and backward schedule generation schemes and modified justification techniques. The effectiveness of the proposed procedures is the subject of the examination with the use of standard test instances with additionally defined financial settlements of a project.
Źródło:
Management and Production Engineering Review; 2018, 9, 4; 106-116
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The analysis of properties of insertion sort algorithm for large data sets
Analiza własności algorytmu sortowania przez wstawianie dla dużych zbiorów danych
Autorzy:
Woźniak, M.
Marszałek, Z.
Gabryel, M.
Powiązania:
https://bibliotekanauki.pl/articles/1203410.pdf
Data publikacji:
2012
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
algorytm sortowania przez wstawianie
zbiór danych
insertion sort algorithm
data set
Opis:
Insertion sort algorithm is one of the sorting algorithms. It is characterized by the computational complexity and time complexity, which represent the possibility of using it for large data sets. The present work is to describe this algorithm and describe it’s performance when sorting large scale data sets.
Algorytm sortowania przez wstawianie jest jednym z algorytmów opisywanych w literaturze. Omawiana metoda została scharakteryzowana poprzez złożoność czasową i obliczeniową algorytmu, która opisuje możliwość stosowania tego algorytmu do sortowania dużych zbiorów danych. Praca ta ma na celu opisanie zachowania algorytmu i jego wydajności dla dużych zbiorów danych.
Źródło:
Zeszyty Naukowe. Matematyka Stosowana / Politechnika Śląska; 2012, 2; 45-55
2084-073X
Pojawia się w:
Zeszyty Naukowe. Matematyka Stosowana / Politechnika Śląska
Dostawca treści:
Biblioteka Nauki
Artykuł
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