Tramwaje wodne jako nowa forma zagospodarowania dróg wodnych aglomeracji trójmiejskiej

The purpose of the paper is to identify the roles currently played by the so-called water tram (ferry) system in the Gdansk Metropolitan Area, which includes the so-called Tri-City (Gdansk, Sopot, Gdynia) as well as towns located on the Hel Peninsula. It is also important to assess changes in passenger volume on selected routes and analyze the reasons why individuals use the water tram system. Most of the research consisted of a review of source materials obtained from the Municipal Transportation Company of Gdansk and Gdynia for the period 2006-2009. The establishment of water tram routes in the Bay of Gdansk increased the tourist attractiveness of the Tri-City agglomeration and the associated towns of Hel and Jastarnia. This is evidenced by the increase in passenger volume from year to year. Currently, water trams are not merely a means of transportation but also constitute a significant tourist attraction. Furthermore, contemporary water trams play an ecological and educational role.Celem pracy jest określenie funkcji, jakie spełnia obecnie tramwaj wodny w przypadku aglomeracji gdańskiej, na którą składa się nie tylko Trójmiasto, ale także miasta Mierzei Helskiej. Również istotne jest określenie zmian, jakie zachodzą w wielkości przewozów pasażerów na poszczególnych trasach, ale także przyczyn skorzystania z tramwaju wodnego. Główne prace polegały na kwerendzie materiałów źródłowych z Zakładu Komunikacji Miejskiej w Gdańsku i Gdyni. Dotyczyły one lat 2006-2009. Uruchomienie tramwaju wodnego na obszarze Zatoki Gdańskiej spowodowało podniesienie atrakcyjności turystycznej nie tylko aglomeracji trójmiejskiej, ale również miast ściśle z nią współpracujących, tj. Helu i Jastarni. Świadczy o tym coroczny wzrost liczby osób korzystających z tego typu transportu. Współcześnie tramwaj wodny posiada inne funkcje niż w przeszłości. Jest on nie tylko środkiem transportu, ale przede wszystkim atrakcją turystyczną i rekreacyjną. Ma on również aspekt ekologiczny i edukacyjny

Survival analysis of patients with locally advanced non-small cell lung cancer treated at the Nu-Med Radiotherapy Center in Elbląg

Introduction.  The study aimed to report the efficiency of radical radiotherapy and chemoradiotherapy in patients with non-small cell lung cancer (NSCLC) treated in the Nu-Med Radiotherapy Center in Elbląg. Material and methods.  Ninety-two patients diagnosed with NSCLC treated between 2013 and 2016 were included in the analysis. Overall survival (OS) was estimated by the Kaplan-Meier method. Results.  The 2-year OS for all patients was 36% (median 1.5 years). Two prognostic factors had a significant impact: tre­atment method and performance status (PS). Patients who underwent concurrent radiochemotherapy and were treated sequentially had a better 2-year OS in comparison with those treated with radiotherapy alone (respectively 46% and 37% vs. 25%, p ≤ 0.05). Patients with PS 0–1 had better OS (median 1.6 years) compared with PS 2 (median 0.7 years, p = 0.04). Other prognostic factors analysed had no impact on OS in our study. Conclusions.  The treatment results of our patients are comparable to those in published trials and meta-analyses

External validation of VO2max prediction models based on recreational and elite endurance athletes

In recent years, numerous prognostic models have been developed to predict VO2max. Nevertheless, their accuracy in endurance athletes (EA) stays mostly unvalidated. This study aimed to compare predicted VO2max (pVO2max) with directly measured VO2max by assessing the transferability of the currently available prediction models based on their R$^{2}$, calibration-in-the-large, and calibration slope. 5,260 healthy adult EA underwent a maximal exertion cardiopulmonary exercise test (CPET) (84.76% male; age 34.6±9.5 yrs.; VO2max 52.97±7.39 mL·min$^{-1}$·kg$^{-1}$, BMI 23.59±2.73 kg·m$^{-2}$). 13 models have been selected to establish pVO2max. Participants were classified into four endurance subgroups (high-, recreational-, low- trained, and “transition”) and four age subgroups (18–30, 31–45, 46–60, and ≥61 yrs.). Validation was performed according to TRIPOD guidelines. pVO2max was low-to-moderately associated with direct CPET measurements (p>0.05). Models with the highest accuracy were for males on a cycle ergometer (CE) (Kokkinos R$^{2}$ = 0.64), females on CE (Kokkinos R$^{2}$ = 0.65), males on a treadmill (TE) (Wasserman R$^{2}$ = 0.26), females on TE (Wasserman R$^{2}$ = 0.30). However, selected models underestimated pVO2max for younger and higher trained EA and overestimated for older and lower trained EA. All equations demonstrated merely moderate accuracy and should only be used as a supplemental method for physicians to estimate CRF in EA. It is necessary to derive new models on EA populations to include routinely in clinical practice and sports diagnostic

THE INFLUENCE OF PRECIPITATION ON THE STATE OF URBAN RIVER QUALITY ON EXAMPLE ORUNKI CREEK

One of the objectives of this work was to study the catchment and watercourse response to precipitation. The study area covered the Potok Oruński, located in northern Poland, in the city of Gdansk. The study period using cartographic materials took years 1908–2000, and field research covered the period from May 2009 to April 2010. Additionally, experimental measurements were conducted to observe the dynamics of changes occurring in the brook during rainfall. The rainfall of 1.3 mm caused an eleven fold increase of the flow, a twofold increase of the water level and a fourfold increase in the velocity of the water molecules. It turns out, that the maximum flow rates is an important variable when assessing the potential risks

THE INFLUENCE OF PRECIPITATION ON THE STATE OF URBAN RIVER QUALITY ON EXAMPLE ORUNKI CREEK

One of the objectives of this work was to study the catchment and watercourse response to precipitation. The study area covered the Potok Oruński, located in northern Poland, in the city of Gdansk. The study period using cartographic materials took years 1908–2000, and field research covered the period from May 2009 to April 2010. Additionally, experimental measurements were conducted to observe the dynamics of changes occurring in the brook during rainfall. The rainfall of 1.3 mm caused an eleven fold increase of the flow, a twofold increase of the water level and a fourfold increase in the velocity of the water molecules. It turns out, that the maximum flow rates is an important variable when assessing the potential risks

Pentaenolate Activation in the Organocatalytic Allylic Alkylation of Indene-2-carbaldehydes

In the manuscript, the application of pentaenolate chemistry for the allylic alkylation of indene-2-carbaldehydes with Morita-Baylis-Hillman (MBH) carbonates is described. The reaction has been realized in a highly enantio- and diastereoselective manner owing to the use of chiral tertiary amine acting as nucleophilic catalyst. Developed reactivity constitutes the first application of organocatalytic pentaenolate activation in asymmetric synthesis expanding the arsenal of catalytic methods. It leads to the formation of synthetically useful building blocks for target oriented synthesis as confirmed in selected transformations of the products

Survival analysis of patients with locally advanced non-small cell lung cancer treated at the Nu-Med Radiotherapy Center in Elbląg

Introduction.  The study aimed to report the efficiency of radical radiotherapy and chemoradiotherapy in patients with non-small cell lung cancer (NSCLC) treated in the Nu-Med Radiotherapy Center in Elbląg. Material and methods.  Ninety-two patients diagnosed with NSCLC treated between 2013 and 2016 were included in the analysis. Overall survival (OS) was estimated by the Kaplan-Meier method. Results.  The 2-year OS for all patients was 36% (median 1.5 years). Two prognostic factors had a significant impact: tre­atment method and performance status (PS). Patients who underwent concurrent radiochemotherapy and were treated sequentially had a better 2-year OS in comparison with those treated with radiotherapy alone (respectively 46% and 37% vs. 25%, p ≤ 0.05). Patients with PS 0–1 had better OS (median 1.6 years) compared with PS 2 (median 0.7 years, p = 0.04). Other prognostic factors analysed had no impact on OS in our study. Conclusions.  The treatment results of our patients are comparable to those in published trials and meta-analyses.Introduction.  The study aimed to report the efficiency of radical radiotherapy and chemoradiotherapy in patients with non-small cell lung cancer (NSCLC) treated in the Nu-Med Radiotherapy Center in Elbląg. Material and methods.  Ninety-two patients diagnosed with NSCLC treated between 2013 and 2016 were included in the analysis. Overall survival (OS) was estimated by the Kaplan-Meier method. Results.  The 2-year OS for all patients was 36% (median 1.5 years). Two prognostic factors had a significant impact: tre­atment method and performance status (PS). Patients who underwent concurrent radiochemotherapy and were treated sequentially had a better 2-year OS in comparison with those treated with radiotherapy alone (respectively 46% and 37% vs. 25%, p ≤ 0.05). Patients with PS 0–1 had better OS (median 1.6 years) compared with PS 2 (median 0.7 years, p = 0.04). Other prognostic factors analysed had no impact on OS in our study. Conclusions.  The treatment results of our patients are comparable to those in published trials and meta-analyses

Transferability of Cardiopulmonary Parameters between Treadmill and Cycle Ergometer Testing in Male Triathletes—Prediction Formulae

Cardiopulmonary exercise testing (CPET) on a treadmill (TE) or cycle ergometry (CE) is a common method in sports diagnostics to assess athletes’ aerobic fitness and prescribe training. In a triathlon, the gold standard is performing both CE and TE CPET. The purpose of this research was to create models using CPET results from one modality to predict results for the other modality. A total of 152 male triathletes (age = 38.20 ± 9.53 year; BMI = 23.97 ± 2.10 kg·m−2) underwent CPET on TE and CE, preceded by body composition (BC) analysis. Speed, power, heart rate (HR), oxygen uptake (VO2), respiratory exchange ratio (RER), ventilation (VE), respiratory frequency (fR), blood lactate concentration (LA) (at the anaerobic threshold (AT)), respiratory compensation point (RCP), and maximum exertion were measured. Random forests (RF) were used to find the variables with the highest importance, which were selected for multiple linear regression (MLR) models. Based on R2 and RF variable selection, MLR equations in full, simplified, and the most simplified forms were created for VO2AT, HRAT, VO2RCP, HRRCP, VO2max, and HRmax for CE (R2 = 0.46–0.78) and TE (R2 = 0.59–0.80). By inputting only HR and power/speed into the RF, MLR models for practical HR calculation on TE and CE (both R2 = 0.41–0.75) were created. BC had a significant impact on the majority of CPET parameters. CPET parameters can be accurately predicted between CE and TE testing. Maximal parameters are more predictable than submaximal. Only HR and speed/power from one testing modality could be used to predict HR for another. Created equations, combined with BC analysis, could be used as a method of choice in comprehensive sports diagnostics

External validation of VO2max prediction models based on recreational and elite endurance athletes.

In recent years, numerous prognostic models have been developed to predict VO2max. Nevertheless, their accuracy in endurance athletes (EA) stays mostly unvalidated. This study aimed to compare predicted VO2max (pVO2max) with directly measured VO2max by assessing the transferability of the currently available prediction models based on their R2, calibration-in-the-large, and calibration slope. 5,260 healthy adult EA underwent a maximal exertion cardiopulmonary exercise test (CPET) (84.76% male; age 34.6±9.5 yrs.; VO2max 52.97±7.39 mL·min-1·kg-1, BMI 23.59±2.73 kg·m-2). 13 models have been selected to establish pVO2max. Participants were classified into four endurance subgroups (high-, recreational-, low- trained, and "transition") and four age subgroups (18-30, 31-45, 46-60, and ≥61 yrs.). Validation was performed according to TRIPOD guidelines. pVO2max was low-to-moderately associated with direct CPET measurements (p>0.05). Models with the highest accuracy were for males on a cycle ergometer (CE) (Kokkinos R2 = 0.64), females on CE (Kokkinos R2 = 0.65), males on a treadmill (TE) (Wasserman R2 = 0.26), females on TE (Wasserman R2 = 0.30). However, selected models underestimated pVO2max for younger and higher trained EA and overestimated for older and lower trained EA. All equations demonstrated merely moderate accuracy and should only be used as a supplemental method for physicians to estimate CRF in EA. It is necessary to derive new models on EA populations to include routinely in clinical practice and sports diagnostic