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Wyświetlanie 1-15 z 92
Tytuł:
Calculation of effective hydraulic parameters of concrete irrigation canals
Autorzy:
Fatxulloyev, Alisher
Rakhimov, Qudratjon
Allayorov, Davronjon
Samiev, Luqmon
Otakhonov, Makhsud
Powiązania:
https://bibliotekanauki.pl/articles/2203516.pdf
Data publikacji:
2023
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
canal bottom relative width
concrete canal
irrigation canal
sediment transport capacity
sedimentation tank
best hydraulic section
trapezoidal shape
Opis:
When taking water from pre-mountain rivers, for transferring of large amounts of river sediments, rich in mineral fertilizers, along with water to crop fields through irrigation networks requires high sediment transport capacity and deformation resistance from irrigation networks. The projecting and construction of irrigation canals with these features in the foothills requires concreting the canal. The high content of river sediments in the Sokh River (5 kg∙m-3) and the low efficiency of the Right Bank Irrigation Reservoir (10-15%) require high hydraulic efficiency of water intake canals from this system. The main challenge is to reduce costs in concreted canals and ultimately ensure technical superiority. In the research were used generally accepted research methods in hydraulics, in particular field research and consequently, mathematical analysis. Kokandsay, Kartan and Bachkir irrigation canals were accepted as the object of research, the canals were designed on the basis of the best hydraulic section, the canal side slope was taken as a variable parameter and the technical and economic efficiency was checked using computer software. As a result, it was found that the consumption of concrete raw material for 1 running meter can save 0.2-0.3 m3, depending on the adoption of the canal side slope, the acceptance of the slope of the canal wall at values 1-1.5 will increase up to sedimentation 10%.
Źródło:
Journal of Water and Land Development; 2023, 56; 14--20
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Risk factors of tympanoplasties in long-term observation
Autorzy:
Janiak-Kiszka, Joanna
Kaźmierczak, Wojciech
Lewandowska, Kinga
Grabowski, Mateusz
Kaźmierczak, Henryk
Kluczyński, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1398256.pdf
Data publikacji:
2018
Wydawca:
Index Copernicus International
Tematy:
tympanoplasty
chronic otitis media
mastoidectomy
canal wall up
canal wall down
Opis:
Objective: The aim of the study was to evaluate risk factors influencing the results of tympanoplasties on the base of material taken from the Department of Otolaryngology and Laryngological Oncology Collegium Medicum of the Nicolaus Copernicus University in Bydgoszcz between 2004-2009. In this period, 98 operations were performed. The time from operations to hearing examination was 3 to 7 years, mean 5,43. Tympanoplastic operations were divided according to Tos classification. Measuring hearing results, tonal audiometry was done and mean air bone gap on four frequencies was assessed (500, 1000, 2000, 3000 Hz), according to AAO-HNS guidelines (1995). This parameter was compared between groups separated according to risk factors, that could potentially affect the results. Those risk factors were: disfunction of the Eustachian tube, location and size of the perforation of the tympanic membrane, damage of the ossicles, the state of the mastoid process, the number of operations, the presence of the cholesteatoma or granulating tissue, chronic otitis media in the opposite ear, smoking cigarettes, mastoidectomy, canal wall down technique. The results were analyzed using statistical test. Results: The most important risk factor affecting treatment results (besides discharge from the ear) is damage of the ossicles, especially the malleus and stapes. A properly performed operation ensures good hearing results irrespectively of the presence of cholesteatoma or granulating tissue, and also in case of reoperation. For all types of tympanoplasties neither the location, nor the size of perforation influence the hearing results in long-term observation.
Źródło:
Polish Journal of Otolaryngology; 2018, 72, 2; 19-29
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The impact of the New Panama Canal on cost-savings in the shipping industry
Autorzy:
Zupanovic, D.
Grbić, L.
Barić, M.
Powiązania:
https://bibliotekanauki.pl/articles/116580.pdf
Data publikacji:
2019
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
Panama Canal
New Panama Canal
shipping industry
Post-Panamax vessels
Panamax Vessels
global shipping
Panama Canal Transit
costs of transport
Opis:
The passage through the Panama Canal has become the usual waterway for all the ships that can navigate through the Canal. The traffic through the canal is limited by the size of a ship. The need for the expansion of the Canal has emerged due to the development of the global trade and the shipping industry. The new dimensions of the lock-chambers determine the size of the ships as well. The new generation of ships built to the largest specifications possible to transit the current locks of the canal are called the Post-Panamax vessels. The maximum dimensions of these ships are 366 meters in length, 49 meters in beam and 15.2 metres in draught. The paper analyses savings in the operational costs on three types of the Post-Panamax vessels after the Canal expansion.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2019, 13, 3; 537-541
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The late results of 4000 Hz frequency bone conduction after tympanoplasty
Autorzy:
Janiak-Kiszka, Joanna
Kaźmierczak, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1398481.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
sensorineural hearing loss
tympanoplasty
mastoidectomy
canal wall-up procedure
canal wall-down procedure
Opis:
Introduction: Surgical treatment of conductive hearing loss runs the risk of damage to the inner ear in the mechanism of acoustic trauma. Aim: The aim of this study was to evaluate the function of the organ of Corti, expressed as bone conduction threshold at the frequency of 4000 Hz for selected operations: mastoidectomy and canal-wall-down procedure. Material and methods: The material was collected from patients with chronic otitis media in the Department of Otolaryngology and ENT Oncology, Collegium Medicum of Nicolaus Copernicus University in Bydgoszcz in 2004–2009. All patients were examined with pure tone audiometry threshold before surgery and at least three years after surgery. The analyzed group of patients was divided into subgroups depending on the type of operation according to To classification and procedures for resection: mastoidectomy and canal-wall-down procedure. The results were statistically analyzed. Results: In the analyzed period of three years after surgery there was no statistically significant difference between groups, although there were higher values for tympanoplasty type 1 with mastoidectomy compared with tympanoplasty type 1 without mastoidectomy - respectively 25.67 dB and 18.53 dB. In the study, there was no statistically significant the difference in bone conduction threshold for frequency 4000 Hz within the type 2 tympanoplasty according to Tosa comparing canal wall-up and canal-wall-down procedure. Conclusions: Mastoidectomy or canal-wall-down procedure do not affect the bone conduction threshold for a frequency of 4000 Hz after tympanoplasty in long-term observation.
Źródło:
Polish Journal of Otolaryngology; 2017, 71, 5; 12-17
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A rare tumor of external auditory canal originated from ceruminous glands: A case raport
Autorzy:
Amernik, Katarzyna
Kłodawska, Aleksandra
Jaworowska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/1399800.pdf
Data publikacji:
2018
Wydawca:
Index Copernicus International
Tematy:
ceruminous adenocarcinoma
external auditory canal
Opis:
External auditory canal neoplasms comprise less than 1 percent of all head and neck tumors. They are ceruminous gland-originated tumors in 2.4 percent of cases. In the past, all these tumors were called ceruminomas. In 1972 Wetli et al. classified these neoplasms into four groups: ceruminous adenomas, ceruminous carcinoma, adenoid cystic carcinomas, and pleomorphic adenomas. Ceruminous adenocarcinoma is very rare. It has no specific symptoms, therefore, an appropriate, quick diagnosis is difficult; it is very aggressive. Treatment should be based on tumor resection and followed by radiotherapy. We presented a case of a 56-year-old female with a lump in the external ear canal, who underwent diagnostic surgical excision of the tumor in the external auditory canal. The postoperative histopathological diagnosis was ceruminous adenocarcinoma (complete excision) and the patient received radiation therapy. Follow-up CT and MR – performed one year after surgery - showed a possible local recurrence of pathology. The patient underwent maximal surgical resection with subtotal petrosectomy but postoperative histological examination showed no malignant cells. Treatment of external auditory canal neoplasms should be based on radical surgical resection. Diagnostic imaging is very important in follow up examination but it can have limited value in terms of its specificity.
Źródło:
Polski Przegląd Otorynolaryngologiczny; 2018, 7, 3; 22-26
2084-5308
2300-7338
Pojawia się w:
Polski Przegląd Otorynolaryngologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
External auditory meatus and/or conchal bowl reconstruction with postauricular island flap in patients with Basal Cell Carcinoma or Squamous Cell Carcinoma
Autorzy:
Iljin, Aleksandra
Antoszewski, Bogusław
Durko, Marcin
Zieliński, Tomasz
Pietruszewska, Wioletta
Powiązania:
https://bibliotekanauki.pl/articles/1398133.pdf
Data publikacji:
2018
Wydawca:
Index Copernicus International
Tematy:
conchal bowl
external auditory canal reconstruction
Opis:
Aims. Presenting our clinical experience with the postauricular island flap (pif) and estimation of the results following partial external auditory canal (eac) and/or auricular conchal bowl reconstructions with pif in patients after carcinoma resections. Methods. We have analyzed postoperative results of 19 patients after auricular conchal bowl (11), or auricular conchal bowl and eac (8) reconstructions with pif, following malignant tumor resections, between 2000-2015. The patients were reexamined and evaluated in respect of early and long-term results after surgical treatment considering both the plastic surgeon’s and the patient’s opinion. Results. The cancers were completely excised in all patients, and there were no recurrences within at least 2 years of follow-up. The observed complications after reconstructions comprised venous congestion in five cases (26.3%), pinning of the operated ear in four patients (21%), prominent earlobe in three (15.8%), and eac constriction in three cases (15.8%). The postoperative result was very good in all cases (both in the opinion of the plastic surgeon and the patients), except for patients with pinning of the operated ear, with a prominent earlobe (moderately satisfied). Conclusions. 1. Combined operations involving postauricular island flap reconstructions after partial (external auditory meatus and/or auricular conchal bowl) resections allowed for complete removal of malignant tumors with no evidence of recurrence, and for the preservation of a proper conchal shape in the reconstructed ear. 2. A retroauricular approach in cases with cancer involvement of the external auditory meatus allowed for proper visualization and estimation of lesions extent, as well as adequate surgical access.
Źródło:
Polish Journal of Otolaryngology; 2018, 72, 3; 4-10
0030-6657
2300-8423
Pojawia się w:
Polish Journal of Otolaryngology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meningoma located primarily within the internal auditory canal - a case report
Autorzy:
Mogla, Maria
Laskus, Anna
Karchier, Emilia
Niemczyk, Kazimierz
Powiązania:
https://bibliotekanauki.pl/articles/1400062.pdf
Data publikacji:
2017
Wydawca:
Index Copernicus International
Tematy:
cerebellopontine angle
meningioma
internal auditory canal
Opis:
A 34-year old male presented with a 5-year history of hearing loss and tinnitus. MRI revealed a intracanalicular tumor deep inside the internal auditory canal invading partially cochlear ganglion. The mass was surgically resected by middle fossa approach. The histological findings showed meningoma primarily located in IAC. This study presents epidemiology, features and treatment of intracanalicular meningomas.
Źródło:
Polski Przegląd Otorynolaryngologiczny; 2017, 6, 1; 8-11
2084-5308
2300-7338
Pojawia się w:
Polski Przegląd Otorynolaryngologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Restoration of fractured canines in ferrets after one-step root canal treatment
Autorzy:
Bladowski, M.
Kotowicz-Gears, A.
Wojtkiewicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/30780.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
canine restoration
cat
clinical procedure
dentistry
dog
ferret
one-step root canal treatment
restoration
root canal treatment
tooth
Opis:
This article describes a one-step root canal treatment and restoration of canine teeth in ferrets. Standard brass posts were used for the reconstruction of the teeth. The procedures were performed by dentists according to all rules and procedures used in root canal treatment in humans. The teeth were immediately restored anatomically. The procedures were successfully performed in four ferrets aged between 6 and 20 months of age, in three upper and one lower canines.
Źródło:
Polish Journal of Veterinary Sciences; 2011, 14, 1
1505-1773
Pojawia się w:
Polish Journal of Veterinary Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Examining changes in the bathymetry of Zalew Szczeciński (West Pomerania)
Autorzy:
Banachowicz, A.
Bober, R.
Dołgopołow, A.
Kozłowski, Z.
Wolski, A.
Powiązania:
https://bibliotekanauki.pl/articles/224462.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
batymetria
Zalew Szczeciński
Kanał Piastowski
bathymetry
Piastowski Canal
Opis:
This article presents the results of the examination of the bottom rubble mounds movements at the entrance to Piastowski Canal after its reconstruction in the years 2001-2005.
Źródło:
Reports on Geodesy; 2007, z. 2/83; 133-139
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowy Kanał Sueski – nowa nadzieja dla Egiptu?
The new Suez Canal - a new hope for Egypt?
Autorzy:
Miciak, J.
Powiązania:
https://bibliotekanauki.pl/articles/364175.pdf
Data publikacji:
2016
Wydawca:
Nowoczesne Budownictwo Inżynieryjne
Tematy:
hydrotechnika
Egipt
Kanał Sueski
hydraulic engineering
Egypt
Suez canal
Opis:
Jedna z największych i najważniejszych inwestycji hydrotechnicznych Egiptu ostatnich lat dobiegła końca. 29 lipca 2015 r. sfinalizowano prace nad Nowym Kanałem Sueskim, a tydzień później, 6 sierpnia, powstałym w rekordowym tempie szlakiem przepłynął pierwszy statek. Egipskie władze upatrują w zakończonym przedsięwzięciu nadziei na ożywienie gospodarcze pogrążonego w stagnacji kraju.
One of the largest and most important hydraulic engineering projects of Egypt in recent years has come to an end. On 29 July 2015 the work on the New Suez Canal was, completed, and a week later, on August 6, the first vessel sailed along the route built in a record time. Egyptian authorities perceive the newly completed project as a hope of economic recovery for the country mired in stagnation.
Źródło:
Nowoczesne Budownictwo Inżynieryjne; 2016, 1; 12-13
1734-6681
Pojawia się w:
Nowoczesne Budownictwo Inżynieryjne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Breaking a tool during the preparation of root canals. The methodology of management with a case report
Autorzy:
Kardasz, P.
Wilczyńska-Borawska, M.
Powiązania:
https://bibliotekanauki.pl/articles/1916713.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Medyczny w Białymstoku
Tematy:
root canal treatment (RCT)
stress fracture
torsional
mechanical preparation
Opis:
Background: Breaking an endodontic instrument is a complication that really hinders or even makes impossible complete disinfection and tight obturation of the root canal system. Case presentation: A 74-year-old patient suffered a fracture of the clinical crown of the second incisor in the maxilla. The examination revealed necrotic pulp and the presence of obliteration significantly limiting the lumen of the tooth canal. It was decided to perform root canal treatment and then to do a reconstruction reinforced by crown-root inlay. An endodontic instrument was broken in the lumen of the root canal at the beginning of the endodontic treatment. A broken piece tightly filled nearly 80% of the total length of the canal. It was decided to use endodontic forceps to remove the fragment.Conclusion: Choosing the right method is a key step in the complication described above. The management technique should entail the least risk of iatrogenic complications because they can greatly affect the long-term maintenance of the tooth. The article discuss on the basis of current literature standards of conduction in the case of tool breakage in the root canal system and presents the problem on the basis of own experience.
Źródło:
Progress in Health Sciences; 2015, 5, 1; 271-275
2083-1617
Pojawia się w:
Progress in Health Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thai Canal and Malacca straits: Complementing or competing stratagem for trade development in South East Asia
Autorzy:
Jeevan, J.
Salleh, N. H. M.
Othman, M. R.
Powiązania:
https://bibliotekanauki.pl/articles/2140913.pdf
Data publikacji:
2018
Wydawca:
Fundacja Centrum Badań Socjologicznych
Tematy:
canal
Implications
Malaysia
seaport system
trade
infrastructure
sustainable development
Opis:
About 94.8 per cent of Malaysian trade is depending on collective inter/intra-regional maritime networks. Straits of Malacca is an important strait and the only strait that connecting Indian Ocean and South China Sea which contributes to the nation's economic growth significantly. This strait plays a key character to enable the trade connection between east and west of the globe. In average, about 63,000 different types of vessels passing through the strait per year and the number of the vessels keep accelerating every year. Conversely, the introduction of Thai Canal to detour the trade voyage between Indian Ocean to South China Sea is expecting to reduce about three to four days journey time between these two passages. Although the development of this canal is predicted to provide substantial benefits to shipping lines, the grey area or disadvantages change to implications of this canal need to be explored especially on Malaysian trade and infrastructure. Therefore, a qualitative approach has been employed to achieve the aim of this paper. Face-to-face interviews with experts from various agencies had been conducted to gather information on the impact of Thai Canal on Malaysian trade and infrastructure. The outcome of this paper indicates that the implication of Thai Canal reduces the productivity of Malaysian seaports, transformation of seaports in northern region as a major hub of the nation, enforcing equal regional development between west and east coast Malaysia and administering dramatic progress on multimodalism in each state. The outcome of this research is important as an input for the preparation of Malaysian seaport system due to any significant changes in the trade route. Although, the development of Thai Canal reduce the overdependence on Malacca Straits, the impact of this this new canal will affects the trade performance of this region. Hence, this paper is significant to understand the implications that might occur to this nation due to dynamism of maritime logistics.
Źródło:
Journal of Sustainable Development of Transport and Logistics; 2018, 3, 2; 34-48
2520-2979
Pojawia się w:
Journal of Sustainable Development of Transport and Logistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ochrona przeciwpowodziowa na obszarze Regionu Wodnego Górnej Odry
Autorzy:
Gołąb, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/2158523.pdf
Data publikacji:
2018
Wydawca:
Instytut Studiów Międzynarodowych i Edukacji Humanum
Tematy:
flood
Upper Oder
flood protection
reservoir
Raciborz
Kłodnica canal
Opis:
In the article focuses on the Kłodnicki Canal and the Raciborz Reservoir as elements of floods protection. Showed the Region characteristic and the biggest floods who frequented it (1903, 1939, 1997, 2010). The most tragic flood was in 1997, when the water level was 10.45 m (water guge in Miedonia). After this flood, works on increasing flood protection started (“Program for Odra river–2006”, “Odra river basin flood protection”. The effect of programs is the constriction of the Racibórz Reservoir, which is to be completed in 2020. Other works are also undertaken (increase of retention in urbanized areas, construction of small retention reservoirs on smaller rivers), which ultimately are to affect the reduction of flood risk in the Region.
Źródło:
Społeczeństwo i Edukacja. Międzynarodowe Studia Humanistyczne; 2018, 2(29); 151-158
1898-0171
Pojawia się w:
Społeczeństwo i Edukacja. Międzynarodowe Studia Humanistyczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unilateral cochleo-vestibular nerve and internal auditory canal malformations
Autorzy:
Kaźmierczak, Henryk
Kaźmierczak, Wojciech
Pawlak-Osińska, Katarzyna
Osiński, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/1399734.pdf
Data publikacji:
2018
Wydawca:
Index Copernicus International
Tematy:
internal auditory canal malformations
unilateral cochleo-vestibular nerve malformations
Opis:
A case report of unusual one-sided developmental disorders of the vestibular and cochlear nerve and the internal auditory canal and difficulty of diagnostic process.
Źródło:
Polski Przegląd Otorynolaryngologiczny; 2018, 7, 1; 59-64
2084-5308
2300-7338
Pojawia się w:
Polski Przegląd Otorynolaryngologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mathematical modeling and computer aided planning of communal sewage networks
Autorzy:
Bogdan, L.
Petriczek, G.
Studziński, J.
Powiązania:
https://bibliotekanauki.pl/articles/384901.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
mathematical modeling of sewage network
hydraulic parameter of canal
Opis:
In the paper the basic questions connected with modeling of wastewater networks are presented. Methods of modeling basic sewage parameters and appropriate calculation algorithms are described. The problem concerns the gravitational networks divided by nodes into branches and sectors. The nodes are the points of connection of several network segments or branches or the points of changing network parameters as well as of location of sewage inflows to the network. The presented algorithms for networks hydraulic calculation concern sanitary or combined sewage nets. It is assumed that the segments parameters such as shape, canal dimension, bottom slope or roughness are constant. Because of these assumptions all relations considered concern the steady state conditions for the network. The calculation of flow velocities and the filling heights in the segments of the wastewater net are carried out for the known slopes and diameters of the canals.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2014, 8, 2; 17-23
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 92

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