Search results

1

Aggregation with a double non-convex labor supply decision: indivisible private- and public-sector hours

100%

Vasilev A.

Ekonomia. Rynek, Gospodarka, Społeczeństwo

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2016

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issue 47

123-133

EN

This paper explores the problem of non-convex labor supply decisions in an economy with both private and public sector jobs. To this end, Hansen (1985) and Rogerson’s (1988) indivisible-hours framework is extended to an environment featuring a double discrete labor choice. The novelty of the study is that the micro-founded representation obtained from explicit aggregation over homogeneous individuals features different disutility of labor across the two sectors, which is in line with the observed difference in average wage rates (OECD 2011). Therefore, this theory-based utility function could be utilized to study labor supply responses over the business cycle.

2

Doubly Extended Fuzzy TOPSIS Method for Group Decision Making

100%

Kacprzak D.

Przegląd Statystyczny

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2019

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vol. 66

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issue 1

27-50

EN

Multiple Criteria Decision Making methods, such as TOPSIS, have become very popular in recent years and are frequently applied to solve many real-life situations. However, the increasing complexity of the decision problems analysed makes it less feasible to consider all the relevant aspects of the problems by a single decision maker. As a result, many real-life problems are discussed by a group of decision makers. In such a group each decision maker can specialize in a different field and has his/her own unique characteristics, such as knowledge, skills, experience, personality, etc. This implies that each decision maker should have a different degree of influence on the final decision, i.e., the weights of decision makers should be different. The aim of this paper is to extend the fuzzy TOPSIS method to group decision making. The proposed approach uses TOPSIS twice. The first time it is used to determine the weights of decision makers which are then used to calculate the aggregated decision matrix for all the group decision matrices provided by the decision makers. Based on this aggregated matrix, the extended TOPSIS is used again, to rank the alternatives and to select the best one. A numerical example illustrates the proposed approach.

3

Feature Selection and Multiple Model Approach in Discriminant Analysis

100%

Gatnar E., Katowice University of Economics I. o. S.

Acta Universitatis Lodziensis. Folia Oeconomica

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2007

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vol. 206

EN

Significant improvement of model stability and prediction accuracy in classification and regression can be obtained by using the multiple model approach. In classification multiple models are built on the basis of training subsets (selected from the training set) and combined into an ensemble or a committee. Then the component models (classification trees) determine the predicted class by voting. In this paper some problems of feature selection for ensembles will be discussed. We propose a new correlation-based feature selection method combined with the wrapper approach.

4

Random Selection of Variables for Aggregated Tree-Based Models

100%

Gatnar E., Rozmus D., The Karol Adamiecki University of Economics K.

Acta Universitatis Lodziensis. Folia Oeconomica

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2006

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vol. 196

PL

Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 zostało dofinansowane ze środków MNiSW w ramach działalności upowszechniającej naukę.

EN

Tree-based models are popular a widely used because they are simple, flexible and powerful tools for classification. Unfortunately they are not stable classifiers. Significant improvement of the model stability and prediction accuracy can be obtained by aggregation of multiple classification trees. Proposed methods, i.e. bagging, adaptive bagging, and arcing are based on sampling cases from the training set while boosting uses a system of weights for cases. The result is called committee of trees, an ensemble or a forest. Recent developments in this field showed that randomization (random selection of variables) in aggregated tree-based classifiers leads to consistent models while boosting can overfit. In this paper we discuss optimal parameter values for the method of random selection of variables (RandomForest) for an aggregated tree-based model (i.e. number of trees in the forest and number of variables selected for each split).

5

„Huffinizacja” treści medialnych

88%

Petrova M.

Zarządzanie Mediami

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2015

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vol. 3

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issue 2

121-132

EN

Convergence has contributed to placing some media contents on different electronic platforms. Bloggers and internet users have almost taken professional journalist’s place. The evolution has affected all branches of media sector, the citizen journalism has entered into the new media and social networks have become a source of information for many people. New models of media content management are primarily targeted at reducing costs and increasing profits and at splitting off from the traditional bilateral management model. In the modern chaos of information overload society needs to have not only free, clear and segregated media content available from a variety of devices but also to share their opinion with others. Such demand was sensed by Arianna Huffington who created the whole media empire counting more than 100 million readers from all over the world. She has created a huge opinion-forming platform (The Huffington Post) which combines a news aggregator and blogging platform together to which you can add TV channels, magazines and e-books activity. Such combination of media content aggregator activity with bloggers platform activity can be defined as “huffinization”. Media content are created by the platform users and more than 30 000 unpaid bloggers that is allowed not only to ramp up profits but also stimulate the development of political and social events.

6

TESSELLATION AS AN ALTERNATIVE AGGREGATION METHOD

63%

Zabarina K.

Metody Ilościowe w Badaniach Ekonomicznych

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2018

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vol. 19

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issue 1

78-91

EN

The sensitivity of statistical results to the choice of a particular zoning system is known as the Modifiable Areal Unit Problem. Level of aggregation is a significant factor determining results. Moving from point data to areal data, one should take into account aggregation and existence of spatial autocorrelation in the data. Though usually Voronoi tessellation is used in different study fields, this paper suggests it can be an alternative aggregation method to connect point and areal data in economics. Paper shows the possibility to calculate spatial average from point data and vice versa.

7

Hierarchiczny model pomiaru jakości życia

51%

Panek T.

Wiadomości Statystyczne. The Polish Statistician

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2015

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issue 6

1-22

RU

В статье были представлены концепции иерархической модели обсле-дования качества жизни в отношении к целям социальной политики, а также инструменты позволяющие проводить это измерение. Качество жизни в этом подходе определяется на основе теории потребностей, которая отождествляется с уровнем удовлетворения социальных потре-бностей. Кроме того была представлена связь понятия качества жизни с социальной интеграцией и сбалансированным развитием.

PL

W artykule przedstawiono koncepcje hierarchicznego modelu badania jakości życia w kontekście celów polityki społecznej oraz narzędzia umożliwiające ten pomiar. Jakość życia w tym ujęciu zdefiniowana jest na gruncie teorii potrzeb, czyli utożsamiana jest z poziomem zaspokojenia potrzeb społecznych. Ponadto przedstawiono powiązania pojęcia jakości życia z integracją społeczną i zrównoważonym rozwojem.

EN

The study presents the concept of the hierarchical model of quality of life investigation in the context of social policy objectives and tools for the life quality measurement. Quality of life in the context of social policy is defined on the ground of the theory of needs, which is identified with the level of satisfaction of social needs. Moreover, the links of the concept of quality of life with social integration and sustainable development were presented.

8

Czy społeczeństwo może uczyć się z doświadczenia? Problem podmiotowości społeczeństwa

38%

Giza A.

Zarządzanie Publiczne / Public Governance

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2014

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issue 3(29)

72-85

PL

Termin „społeczeństwo” powszechnie używany jest jako podmiot różnego rodzaju twierdzeń: „społeczeństwo zmierza w stronę…”, „społeczeństwo nie ufa politykom” itp. Na poziomie teoretycznym przeważa jednak indywidualizm zarówno w wymiarze ontologicznym („społeczeństwo” jest jedynie złożeniem jednostkowych działań), jak i metodologicznym. Przy pewnej opcji teoretycznej możliwe jest jednak ujęcie społeczeństwa jako intencjonalnego, sprawczego podmiotu zdolnego do budowania struktur samowiedzy i poddającego refleksji swoje działania. W artykule dyskutowane są konsekwencje przyjęcia „nastawienia intencjonalnego” (intentional stance) w badaniu społeczeństwa.

EN

The term “society” is usually used as the subject of various statements: “society tends to…”, “society does not trust politicians”, etc. Theoretically, however, individualism prevails both ontologically (“society” is a complex of individual actions) and methodologically. However, there exists a theoretical stance that considers society as an intention-driven agent, a self-reflective subject able to build the structures of self-knowledge. The paper discusses the consequences of adapting the “intentional stance” in the study of society.

9

Życie gospodarcze i kulturalne w powiecie gostynińskim w okresie międzywojennym (1918-1939)

38%

Chudzyński M.

Rocznik Towarzystwa Naukowego Płockiego

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2017

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vol. 9

s. 204-234

PL

Ludność powiatu gostynińskiego, jego miast i wsi z ogromnym zadowoleniem przyjęła odzyskanie przez Polskę niepodległości w listopadzie 1918 roku. Serdecznie witano w Gostyninie 10 kwietnia 1921 r. twórcę niepodległości Polski Józefa Piłsudskiego jadącego do Płocka na uroczystości odznaczenia tego Miasta Krzyżem Walecznych. Autor opracowania na podstawie materiałów źródłowych, opracowań historycznych, a także prasy regionalnej stara się przedstawić rozwój gospodarczy powiatu gostynińskiego w okresie międzywojennym (1918-1939), a także rozwój szkolnictwa i życia kulturalnego. Wielkim wydarzeniem w życiu powiatu było wybudowanie linii kolejowej łączącej Kutno z Gostyninem i Radziwiem. Stało się to w latach 1919-1925. Kolejowe połączenie Gostynina z Kutnem ułatwiało kontakt mieszkańców Gostynina z Warszawą, Łodzią, a także Poznaniem. Negatywny wpływ na życie gospodarcze powiatu, jak i całego kraju miał wielki kryzys gospodarczy w latach 1929-1933. Wzrosło wówczas bezrobocie i pogłębiła się bieda wśród mieszkańców powiatu. W 1933 r. została zlikwidowana papiernia w Soczewce. Pracę straciło kilkuset pracowników. Mimo to badacze regionu gostynińskiego pozytywnie oceniają zmiany w życiu gospodarczym powiatu w okresie międzywojennym, tj. 1918-1939. Według Józefa Kazimierskiego, współautora monografii „Dzieje Gostynina i ziemi gostynińskiej” wydanej w 1990 r., lata 1918-1939 można uznać za pomyślne dla rozwoju Gostynina, jak również dla Gąbina, a lata 1935-1939 wręcz za okres przyspieszonego rozwoju.

EN

Population of the Gostynin district, including its towns and villages, accepted the reclaimation of independence with utmost satisfaction by Poland in November 1918. The creator of the Polish independence, Józef Piłsudski, who was driving to Płock for the ceremony of awarding that town the Distinguished Service Cross, was warmly welcomed in Gostynin on 10th April 1921. The Author of the study, based on source materials, historical studies and regional press, aims at presenting the economic, educational and cultural development of the Gostynin district during the interwar period (1918-1939). A great event in the district’s life was building a railway line joining Kutno with Gostynin and Radziwie. It took place between years of 1919 and 1925. The train connection between Gostynin and Kutno made an easy contact for Gostynin inhabitants with Warsaw, Łódź and Poznań. A negative influence, not only on the district’s economic life, but also on the whole country, had large economic crisis in 1929-1933. At that time unemployment and poverty among the district’s inhabitants increased. In 1933 a paper mill in Soczewka was liquidated and due to it a few hundred workers lost their jobs. In spite of that researchers of the Gostynin region are positively assessing changes in the district’s economic life during the interwar period 1918-1939. According to Józef Kazimierski, an coauthor of „The Gostynin and its Region Story” monograph being issued in 1990, the period 1918-1939 could be regarded as the favorable one for development of both Gostynin and Gąbin and the period 1935-1939 as the period of the accelerated expansion.

10

Genologia wobec rewolucji cyfrowej. Przypadek reportażu

38%

Pietrzak P.

Tematy i Konteksty

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2022

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vol. 17

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issue 12

55-72

EN

I compare the concept of today intermedial reportage to that before Internet era. Several features of this genre, usually considered as purely contemporary ones, can be found in the works of 20th century Polish writers including interwar period. Multi-, trans- and intermedial reportages, multiplication of their editorial channels and some forms of participation can be discovered before time of World Wide Web, on condition that we take into consideration newspaper editions, not only those in the books. Digital revolution then looks merely like a change of carrier rather than a huge turn in the history of some literary genres. Moreover, what it offers (internet channels, social media), is of much less durability than traditional paper texts, and readers’ participation here is frequently limited to commentaries or some cues for authors. Many of them vanish shortly afterwards, what makes a ‘participatory culture’ a cultural illusion.

Refine search results

Aggregation with a double non-convex labor supply decision: indivisible private- and public-sector hours

Doubly Extended Fuzzy TOPSIS Method for Group Decision Making

Feature Selection and Multiple Model Approach in Discriminant Analysis

Random Selection of Variables for Aggregated Tree-Based Models

„Huffinizacja” treści medialnych

TESSELLATION AS AN ALTERNATIVE AGGREGATION METHOD

Hierarchiczny model pomiaru jakości życia

Czy społeczeństwo może uczyć się z doświadczenia? Problem podmiotowości społeczeństwa

Życie gospodarcze i kulturalne w powiecie gostynińskim w okresie międzywojennym (1918-1939)

Genologia wobec rewolucji cyfrowej. Przypadek reportażu