33 research outputs found

    Analytic structure of weighted shifts on directed trees

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    The class of weighted shifts on directed trees generalizes classical weighted shifts. It was introduced a few years ago and provided a lot of examples of operators with interesting properties. In the talk I will concentrate on analytic properties of these operators. In particular, I will prove that a weighted shift on a directed tree is related to a multiplier algebra of coefficients of analytic functions. This result leads to a kind of functional calculus for functions from multiplier algebras. Furthermore, I will present some properties of the spectrum and bounded point evaluations of these operators. The talk is based on a joint work with P. Budzy艅ski and M. Pta

    Reconciling Multiple Stakeholders in University ICT Curricula Development: Preliminary Lessons Learned from Poland and Norway

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    Shaping university ICT-related module curricula involves multiple stakeholders and formal and informal procedures. This paper identifies the main stakeholders of university curricula development and investigates how curricula are shaped. Based on semi- structured interviews with university teachers at Krakow University of Economics, Poland, and the University of South-Eastern Norway, the preliminary, inductive analysis of the qualitative data allows us to propose the Curriculum Redesign and Engagement for Advancing Tech Teaching and Education (CREATE) model of curricula changes. CREATE acknowledges the power of intrinsic motivation of the teacher, and it incorporates the dynamics of technology push factors and primary stakeholders (teachers, students, graduates, university, national and international institutions, and employers)

    Management of extremity soft tissue sarcomas

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    Post臋powaniem z wyboru u chorych na mi臋saki tkanek mi臋kkich ko艅czyn w stopniach zaawansowania I-III jest oszcz臋dzaj膮cy narz膮d zabieg chirurgiczny (LSS) skojarzony z pooperacyjnym napromienianiem, najcz臋艣ciej teleradioterapi膮. Wyniki uzyskane t膮 metod膮 leczenia s膮 por贸wnywalne z wynikami radioterapii przed- lub 艣r贸doperacyjnej. Dotychczas jednoznacznie nie ustalono roli leczenia systemowego w tej grupie chorych. Przegl膮d pi艣miennictwa wskazuje, 偶e chemioterapia u cz臋艣ci leczonych wyd艂u偶a czas do wyst膮pienia wznowy miejscowej, ale nie ma znamiennego wp艂ywu na czas prze偶ycia ca艂kowitego. U chorych z nowotworem w IV stopniu zaawansowania chemioterapia jest wy艂膮cznie post臋powaniem paliatywnym.Limb sparing surgery and adjuvant radiation therapy is the treatment of choice in patients with soft tissue sarcomas of extremities, stages I-III. The results obtained by preoperative or intraoperative irradiation are judged to be similar, as compared to postoperative radiotherapy. The role of chemotherapy in this group of patients remains controversial, analysis in the literature demonstrates that its use as an adjunct to local therapies may prolong a time to relapse but does not give a benefit in overall survival. In stage IV patients, chemotherapy plays a palliative role only

    Gender does not influence event-free survival in patients with ischaemic heart disease undergoing non-emergency coronary angiography : a single centre analysis

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    Background: Although gender-related differences in cardiovascular risk in patients with acute coronary syndromes have been investigated several times in Poland, there are few data on the effects of gender on management of patients with stable ischaemic heart disease (IHD). In addition, available data on the prognosis in this condition in men and women are also scarce. Aim: To assess gender-related differences in treatment and event-free survival in patients with IHD undergoing non-emergency coronary angiography. Methods: 960 consecutive patients with IHD undergoing coronary angiography were included. Study end points were ascertained over 4.5-year follow-up in 925 patients, of whom 187 were women and 738 were men. The primary end-point consisted of cardiovascular death, myocardial infarction, stroke, cardiac arrest, PCI, CABG or heart transplantation. Results: Female gender was independently related to higher prescription rate of beta-blockers [odds ratio 1.89 (95% CI 1.08-3.29)], ACE inhibitors [1.47 (1.01-2.16)] and calcium antagonists [1.65 (1.08-2.53)] at the time of coronary angiography. On the other hand, female gender was not independently related to the probability of PCI [1.01 (0.69-1.49)] or CABG [0.91 (0.57-1.48)]. We did not find any gender-related difference in the risk of the primary end point [hazard ratio 0.94 (95% CI 0.67-1.34)] or the three predefined secondary end points. Conclusions: Female gender was independently related to a higher prescription rate of beta-blockers, ACE inhibitors and calcium antagonists. No gender-related revascularisation was found in respect of myocardial revascularisation. Gender was not an independent factor affecting event-free survival in patients with IHD undergoing non-emergency coronary angiographyWst臋p: Wyniki bada艅 oceniaj膮cych wp艂yw p艂ci na rokowanie u pacjent贸w z ostrymi zespo艂ami wie艅cowymi s膮 sprzeczne. Natomiast wyniki bada艅 oceniaj膮cych wp艂yw p艂ci na rokowanie u pacjent贸w ze stabiln膮 chorob膮 niedokrwienn膮 serca (IHD) s膮 nieliczne i r贸wnie偶 rozbie偶ne. W Polsce nie analizowano dot膮d wp艂ywu p艂ci na rokowanie w tej grupie chorych. Tak偶e wyniki bada艅 dotycz膮cych relacji mi臋dzy p艂ci膮 a cz臋sto艣ci膮 stosowania lek贸w kardiologicznych oraz cz臋sto艣ci膮 rewaskularyzacji mi臋艣nia sercowego nie s膮 zgodne. Cel: Ocena wp艂ywu p艂ci na cz臋sto艣膰 stosowania lek贸w kardiologicznych, cz臋sto艣膰 wykonywania zabieg贸w angioplastyki wie艅cowej (PCI) oraz operacji pomostowania aortalno-wie艅cowego (CABG), a tak偶e rokowanie u os贸b z IHD poddawanych koronarografii w trybie planowym. Metodyka:Do badania zakwalifikowano 960 kolejnych pacjent贸w z IHD poddawanych koronarografii. Chorob臋 niedokrwienn膮 serca zdefiniowano jako co najmniej jedno zw臋偶enie >50% w t臋tnicy wie艅cowej lub zawa艂 mi臋艣nia sercowego lub rewaskularyzacj臋 w wywiadzie. Wyst臋powanie powik艂a艅 sercowo-naczyniowych oceniono u 925 os贸b (738 m臋偶czyzn oraz 187 kobiet). Pierwszorz臋dowy punkt ko艅cowy zdefiniowano jako zgon z przyczyn sercowo-naczyniowych, zawa艂 serca, udar m贸zgu, zatrzymanie kr膮偶enia, PCI, CABG lub transplantacj臋 serca. Wyniki: Kobiety by艂y starsze od m臋偶czyzn (60,6±9,2 lat vs 57,5±10,0 lat,
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