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Open access

Piotr Kamiński

Morphological and Commercial Characters of Brussels Sprout Androgenic R2/R3 Generations and Experimental F1 Hybrids

In the years of 2005-2007 twelve Brussels sprout androgenic lines of R2 and R3 generations derived from four commercial cultivars: Ajax F1, Diablo F1, Icarus F1, Philemon F1 were evaluated according to marketable yield, plant height, intraline uniformity and other morphological traits important for the breeding. In 2007 twelve single F1 hybrids obtained by the use of androgenic lines were also evaluated in comparison to their parental components. Evaluation showed extended diversity of morphological (plant height, shape of the head, uniformity) and agroeconomical characters among the tested lines. Nine lines showed good intraline uniformity and stability in R2 generation. After selection all tested lines of R3 generation were uniform. Experimental F1 hybrids showed intraline homogeneity, high yield similar to Diablo and Philemon F1 control cultivars and morphological characters typical for good quality commercial Brussels sprout. Some level of inbreeding depression among androgenic lines was observed in comparison to their donor cultivars, while experimental F1 hybrids showed significant effect of heterosis.

Open access

Piotr Kamiński

ABSTRACT

In the years of 2011 and 2013, seventeen inbred lines of Chinese cabbage were evaluated according to the ability for the generative propagation and the expression of self-incompatibility. Most of the lines pollinated in the greenhouse at the open flower stage were characterized by an intermediate level of selfincompatibility and formed less than one seed/silique; the other lines were highly self-incompatible or selfcompatible. The lines pollinated at the green bud stage were highly diversified according to the ability for seed development in both years of propagation; however, most of the lines formed sufficient amount of seeds for use as parental components. The average effectiveness of generative propagation after pollination at the open flower and green bud stages was higher in 2011 than in 2013, probably due to different weather conditions in these years influencing the seed development or inbreeding depression.

Open access

Piotr Kamiński

ABSTRACT

In the years of 2012-2013 male-sterile cauliflower genotypes with the Brassica nigra cytoplasm and their maintainers were tested with respect to their ability for generative propagation and the quality of agronomical traits in comparison to male-fertile inbreeds and sterile genotypes with the Ogu-INRA cytoplasm. The ability for the generative propagation for male-sterile genotypes with the B. nigra cytoplasm was diversified and lower than for the maintainer, fertile lines and lines with the Ogu-INRA cytoplasm.

Generative stalks of cauliflowers with the B. nigra cytoplasm usually had a higher number of buds and flowers in comparison to the fertile genotypes and to the sterile Ogu-INRA lines. The most desired commercial characteristics, such as circular shape, compactness of curd and intermediate or strong coverage by leaves, were noticed for sterile lines with the Ogu-INRA cytoplasm and their fertile complementary lines. Three experimental F1 hybrids showed good quality in comparison to commercial F1 cultivars.

Open access

Piotr Kamiński

ABSTRACT

The aim of this study was to obtain new broccoli lines with cytoplasmic male sterility trait for the development of the modern F1 hybrids. CDT70 cauliflower line obtained in the Research Institute of Horticulture, formerly Research Institute of Vegetable Crops, Skierniewice, Poland, with the reliable cytoplasmic male sterility from Raphanus sativus (Ogu-INRA) was selected as a source of this trait. Three broccoli lines: BMi, BCr1 and BCr2 were used as donors of commercial characters in all cross combinations with sterile components. Selected fertile broccoli genotypes were characterized by good quality, uniformity and high level of self-compatibility. The breeding procedure included three consecutive back crosses of male sterile genotypes with fertile broccoli lines that lasted from 2008 to 2012. In each generation, self-compatibility level, the stability of the male sterility trait and ability for the generative propagation of back-crossed genotypes were tested in comparison with donor broccoli lines in the greenhouse. The agronomical and morphological characters of the back-crossed progeny were also evaluated in the field. As a result, three CMS broccoli lines of Bc3 generation with good quality and high seeding index, suitable for the breeding purposes, were obtained.

Open access

Piotr Kamiński and Wiesław Tarełko

Management of assignment of operational tasks realized in ship power plant

The frequent cause of ships' detentions by port authorities are abnormalities of ship power plant functioning. Each extended ship lay time in port results in waste of ship operating time thus costs rise to shipowners. This is connected with improper ship power plant management. In order to avoid this, a ship engineer should have at his disposal computer aided system supporting him in managing of ship power plant. Such a system can be worked out on condition that mathematical formula which represents the decision - making process of an engineer has been built. The present work shows approache to the problem according to the situation in which the engineer is made to take certain decisions. In formulation of the most substantial operating states of a ship like lay time in harbour and sea voyage the ‘knapsack algorithm’ was applied. For both approaches objective function was formulated.

Open access

Przemysław Szufel, Bogumił Kamiński and Piotr Wojewnik

Abstract

An important aspect of the simulation modelling process is sensitivity analysis. In this process, agent-based simulations often require analysis of structurally different parameter specifications - the parameters can be represented as objects and the object-oriented simulation configuration leads to nesting of simulation parameters. The nested parameters are naturally represented as a tree rather than a flat structure. The standard tools supporting multi-agent simulations only allow only the representation of the parameter space as a Cartesian product of possible parameter values. Consequently, their application for the required tree representation is limited. In this paper an approach to tree parameter space representation is introduced with an XML-based language. Furthermore, we propose a set of tools that allows one to manage parameterization of the simulation experiment independently of the simulation model.

Open access

Piotr Kaminski

Abstract

The frequent causes of ships’ detentions by port authorities are abnormalities of marine power plant functioning. Each extended ship lay time in port results in a waste of ship operating time thus costs rise to ship owners. This is connected with improper marine power plant management. In order to avoid this, a ship engineer should have at his disposal computer aided system supporting him in the managing of the marine power plant. One element of the decision making process in managing the marine engine room is to determine how important is each of the tasks which the operators have to do. This estimation is the base to choose the most important tasks and make optimal schedule with them using AHP method. Based on practice, a hierarchic structure of factors influencing a tasks validity in the engine room operating process was made. Next a preliminary questionnaire was conducted, which put questions to the experts as chief engineers next. This enabled to define numerical values of suitable coefficients influencing on the validity of operating tasks, show results of calculations in form of mileage parameters of engine as a function of crank angle.

Open access

Wiesław Tarnowski, Piotr Kamiński and Krzysztof Bielecki

Results of Surgical Treatment of Colorectal Cancer in Octogenerians Patients

The aim of the study was to estimate factors affecting results of surgical treatment of colorectal cancer in octogenarian patients in comparison with a group of younger patients.

Material and methods. Hospital records were reviewed prospectively and data were collected from a consecutive series of 1021 patients operated on because of primary colorectal cancer between 1988 and 2009.

Results. One hundred sixteen patients aged minimum 80 years of life were identified with an average age of 83.6 years. They were compared with 905 younger patients with an average age of 61.9 years. Co-morbidity, presentation in ASA 2, ASA 3 and ASA 4 score were significantly higher in octogenarian than in younger patients group. Emergent operations were performed significantly more often in octogenerians than in younger patients as well (31% versus 14% respectively). Resection of cancer and primary bowel anastomosis was performed less often in patients aged over 80 years than in younger patients (58.6% versus 70.9% respectively). Postoperative complications rate was significantly higher among the older than younger patients (43.9% versus 30.7% respectively). Mortality was higher in older than in younger patients (22.4% vs 5.7% respectively).

Conclusions. Results of surgical treatment of colorectal cancer in octogenarian patients are affected by higher co-morbidity and more often presentation of ASA 3 and ASA 4 score than in younger patients. Surgical treatment of colorectal cancer in octogenarians is burdened with higher rate of postoperative complications and almost four times higher mortality rate than in younger patients.

Open access

Piotr W. Saługa and Jacek Kamiński

Abstract

Precise valuation of the economic efficiency of risky investment projects in the mineral sector has a direct impact on the range of future investments. Since the mid-90s, a number of enterprises have also been giving increased attention to the valuation of managerial flexibility that cannot normally be estimated with classical discounted cash flow (DCF) analysis. This has been the result of a development in the real options analysis (ROA) and the simplification of its algorithms, most of which have been achieved through:

  • ♦ incorporating lattice models,

  • ♦ introducing a single uncertain project parameter (gross present value, PV) as an underlying instrument,

  • ♦ assuming that the underlying asset follows the multiplicative stochastic process,

  • ♦ introducing the ‘marketed asset disclaimer’ (MAD) assumption.

Unfortunately, in most cases, models constructed on the abovementioned assumptions and modifications are not consistent with real projects. Some analysts recognize that project PVs might not follow the multiplicative process, which could have a direct impact on the project’s value. In order to improve the MAD approach, the paper proposes a modified model where the multiplicative tree is replaced with an additive one. In addition, methods of ‘additive volatility’ calculation and ‘dividend’ adjustments were suggested.

Open access

Pablo Benalcazar, Jacek Kamiński and Piotr W. Saługa

Abstract

In order to achieve two main objectives: (1) reduce risk and (2) increase the expected rate of return on invested capital, coal mining and coal trading companies have looked for new ways to improve their supply chain networks. Developments in the supply chain design and analysis have helped coal mining and coal trading companies expand their businesses, but at the same time, have forced them to consolidate their assets and downsize any underused storage facilities. In the coal mining industry, the problem of consolidation and downsizing becomes much more complicated due to the variety in quality parameters (hence many coal grades) involved, locational zones and different number of market players. Furthermore, for the last decade, the storage allocation and assignment problem has received a great deal of attention within the Logistics and Operation Research (OR) area. Yet, little attention has been given to the modeling of coal supply chains and the issue of strategic supply chain planning of coal-producing and coal-trading companies. Similar to the generic warehouse consolidation problem (WCP), in specific cases of coal-producing and coal-trading companies, storage facilities that are redundant or underutilized can be eliminated without causing a negative impact on customer and service levels. In this context, this paper discusses the background of the problem and proposes a mixed-integer linear programming (MILP) model mainly intended for storage and distribution network reconfiguration of a coal-producing or trading company. The model, which can be implemented in a high-level mathematical modelling system such as GAMS or AIMMS, captures the essential methodological features of a warehouse restructuring and/or consolidation problem and can be applied in practice.