44 research outputs found
Endobronhalnim ultrazvukom voÄena aspiracija tankom iglom (EBUS-TBNA): Phyllodes tumor s me- tastazom u medijastinumu, vrlo rijedak tip metastatske neoplazme dojke
Phyllodes tumor of the breast, diagnosed predominantly in middle-aged women, is a rare fi- broepithelial neoplasm that makes up less than 1% of all breast neoplasms. Most phyllodes tumors have a benign nature with rare local recurrences, but some cytological subtypes are known for their malignant behavior. In this case report, we presented a patient with an extremely rare malignant sarcomatous differentiation of phyllodes tumor with metastasis to mediastinal lymph nodes, diagnosed by using endobronchial ultrasound-guided transbronchial needle aspiration (EBUS-TBNA).Phyllodes (filoidni) tumor dojke, dijagnosticiran pretežno u žena srednje dobi, rijetka je fibroepitelna neo- plazma koja Äini manje od 1% svih neoplazmi dojke. VeÄina filoidnih tumora dojke ima benignu prirodu s rijetkim lokalnim recidivima, ali odreÄeni citoloÅ”ki podtipovi poznati su po svom malignom ponaÅ”anju. U ovom prikazu sluÄaja prikazali smo bolesnicu s iznimno rijetkom malignom sarkomatoznom diferencijacijom tumora filoidesa s metastazama u medijastinalne limfne Ävorove, dijagnosticiranom uz pomoÄ transbronhalne aspiracije iglom voÄene endobronhalnim ultrazvukom (engl. Endobronchial ultrasound-guided transbronchial needle aspiration, EBUS-TBNA)
Endobronchial ultrasound-guided transbronchial fine needle aspiration (EBUSTBNA): Solitary fibrous tumor of the mediastinum
A solitary fibrous tumor is a rare type of mesenchymal neoplasm with a described incidence of 1 new case in a million people a year. It is slowgrowing tumor that can arise almost anywhere in the body, usually with benign characteristics with little or no symptoms, until it grows big enough to cause symptoms of compression. In this case report we presented a patient with a rare case of a mediastinal solitary fibrous tumor
Primary Ewing sarcoma of lungs with mediastinal metastasis, a rare type of metastatic lung neoplasm
Maligna bolest, ili je neŔto drugo?
Sarcoidosis is a disease characterized by formation of granulomas in various tissues and organs. Changes most frequently occur in the lungs and lymph nodes.Sarkoidoza je bolest karakterizirana rastom granuloma u raznim tkivima i organima. Ove promjene se najÄeÅ”Äe pojavljuju u pluÄima i limfnim Ävorovima
Primena kamera i tehnika obrade video zapisa za procenu protoka u kanalizacionim sistemima - iskustva merne kampanje Novi Banovci
Tehnike merenja u hidrotehnici zasnovane na upotrebi kamera i naknadnoj obradi video zapisa u trendu su poslednje dve decenije. Odlikuju ih tehniÄka jednostavnost, niska cena i prilagodljivost hardvera i softvera. MeÄutim, primena za merenje protoka u kanalizacionim sistemima nije analizirana u literaturi. Tim GraÄevinskog fakulteta Univerziteta u Beogradu osmislio je, konstruisao i postavio merni ureÄaj, baterijski napajan mikroraÄunar sa IC kamerom u kanalizacioni Å”aht u naselju Novi Banovci radi kontinualnog merenja dotoka upotrebljene vode. Rad prikazuje specifiÄnosti upotrebe mernog ureÄaja i tehnike obrade video zapisa. Preliminarni rezultati pokazuju potencijal razvijene metodologije, posebno tamo gde konvencionalna oprema nije primenjiva
SSIMS-FLOW: Flow Rate Estimation Tool Using Surface Velocity Imagery From Unmanned Aerial Vehicles
Merenje protoka u otvorenim kanalima Äesto je dugotrajan, invazivan, složen i skup poduhvat, koji neretko ukljuÄuje veÄi broj naroÄito obuÄenih rukovaoca opremom, i razliÄite naknadne obrade podataka sa terena. Razvoj tehnologije lakih bespilotnih letelica opremljenih kamerama omoguÄio je alternativan pristup posrednog merenja protoka putem analize polja povrÅ”inskih brzina u otvorenom toku. Iako merenja ovom metodom pružaju podatke viÅ”e merne neizvesnosti od konvencionalnih mernih metoda, opisana procedura beskontaktnog merenja protoka je (1) vremenski efikasnija, (2) zahteva manji broj rukovaoca opremom, (3) primenjiva Äak i u odreÄenim uslovima u kojima konvencionalne metode nisu i (4) otvara moguÄnost automatizovanog i autonomnog monitoringa vodotoka. Procedura hidrometrijske analize video zapisa joÅ” uvek nije standardizovana, i na tržiÅ”tu se teÅ”ko pronalazi alat koji uspeÅ”no obavlja sve korake neophodne za dobijanje podataka o brzinama i protoku. Alat SSIMS-Flow razvijen je sa ciljem da omoguÄi lak pristup razliÄitim koracima pripreme i procesiranja podataka iz video zapisa u sveobuhvatnom procesu ā od pripreme āsirovogā video zapisa do procene vrednosti protoka ā Äime se drastiÄno pojednostavljuje primena opisane metoda merenja.Open-channel flow rate measurement is often a time consuming, invasive, complex, and expensive procedure, which frequently requires involvement of multiple equipment operators and various postprocessing techniques. The development of camera-equipped lightweight unmanned aerial vehicles has enabled an alternative approach of indirect flow rate measurement by analyzing the surface flow velocities. Although the data acquired by this approach experiences somewhat higher measurement uncertainty than that of conventional measurement techniques, such non-contact measurement method is (1) more time efficient, (2) requires fewer operators, (3) can be applied in certain conditions when conventional methods are unfeasible, and (4) allows for automated and autonomous flow monitoring. Hydrometric analyses of video footage are still unstandardized, and finding a suitable tool which successfully deals with all the necessary actions for velocity and flow estimation has proven to be difficult. SSIMS-Flow tool is developed with the aim of providing easy access to different actions of video footage data preparation and processing to enable a holistic process ā from preparing a ārawā video footage to the estimation of flow rate ā which drastically simplifies the described approach.M51, Originalni nauÄni rad, UDK: 532.570.
HidrauliÄki proraÄun umirujuÄeg bazena neprizmatiÄnog stepenastog brzotoka
The influence of converging stepped spillways on dimensions of the stilling basins for RCC dams was studied, based on the results of physical modeling, existing empirical expressions, and basic laws of fluid mechanics and hydraulics. The study includes analysis of parameters that affect the magnitude of a hydrodynamic force which is transferred into the stilling basin, and presents an original design methodology. A procedure for simplifying the optimization process for the entire spillway is proposed.Zbornik radova GraÄevinskog fakultet
Wastewater flow measurements in sewer networks: Combining innovative and conventional measurement methods
Jedan od preduslova za efikasno upravljanje i strateÅ”ko planiranje razvoja kanalizacionih sistema je dobro poznavanje dinamike rada mreže. KljuÄnu ulogu imaju mereni podaci, prvenstveno o promenama protoka i nivoa, kako u suÅ”nom tako i u kiÅ”nom period. Nažalost, kanalizacione mreže su u veÄini sluÄajeva slabo pokrivene adekvatnim mernim mestima. Tako prilikom planiranja kapitalnih investicija, npr. postrojenja za preÄiÅ”Äavanje otpadnih voda, nedostajuÄi podaci se obezbeÄuju kroz merne kampanje. KljuÄni izazovi pri sprovoÄenju mernih kampanja su povezani sa lokacijski i hidrauliÄki nepovoljnim mernim lokacijama, koje negativno utiÄu na kvalitet izmerenih podataka. U ovom radu je prikazan primer kombinovanja inovativnih sa konvencionalnim metodama za merenja protoka u kanalizacionim sistemima sa ciljem dobijanja reprezentativnih podataka u složenim mernim uslovima.One of the prerequisites for efficient management and development planning of the sewer systems is the adequate knowledge of network dynamics. Measured data play a key role, mainly the flow rate and level variations in dry and wet periods. Unfortunately, sewer networks are commonly scarcely covered with measurement systems. Thus, when capital investments are planned, e.g. wastewater treatment plants (WWTP), missing data is acquired through measurement campaigns. Challenges in the execution of the measurement campaigns are mostly correlated to hydraulically and organizationally unfavorable measurement locations, reflecting negatively on the quality of the measured data. In this paper, an example of the combination of the innovative and conventional flow measurement methods in sewer networks is shown, to allow for the acquisition of the representative data in complex measurement conditions
Uticaj veliÄine, rasporeda i položaja blokova umirujuÄeg bazena stepenastog brzotoka na preostalu energiju
Stepenasti brzotoci su dobri disipatori energije, posebno pri nižim vrednostima jediniÄnog protoka. Sa poveÄanjem jediniÄnog protoka, efikasnost disipacije se smanjuje Å”to rezultuje veÄom preostalom energijom na ulazu u umirujuÄi bazen. Da bi se smanjile dimenzije bazena a poveÄala pouzdanost i efikasnost njihovog rada, Äesto se projektuju sa blokovima. Uticaj dimenzija, rasporeda i položaja blokova za umirenje za potrebe ovog rada, ispitan je na fiziÄkom modelu. Rezultati su pokazali da se efikasnost disipacije može poboljÅ”ati poveÄanjem broja blokova (npr. dva reda umesto jednog) i da je povoljnije ukoliko su najuzvodniji blokovi manji. Rezultati ukazuju i da veÄi broj zuba može znaÄajno da poboljÅ”a i stabilnost toka nizvodno od hidrauliÄkog skoka i smanjiti prskanje. U narednim fazama, ispitivanja obuhvatili bi se i umirujuÄi bazeni sa nagnutim dnom