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Wyświetlanie 1-14 z 14
Tytuł:
DISCLOSURES ON CONTROL OVER FINANCIAL REPORTING: THE REPORTING PRACTICE OF BANKS LISTED ON THE WARSAW STOCK EXCHANGE
Autorzy:
Gad, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/599382.pdf
Data publikacji:
2015
Wydawca:
Wyższa Szkoła Informatyki i Zarządzania z siedzibą w Rzeszowie
Tematy:
banks
financial reporting
disclosures
control over financial reporting
Opis:
The purpose of this paper is to identify the effects of the implementation of selected regulations on corporate governance in the reporting practice of banks listed on the Warsaw Stock Exchange. The survey examined the disclosures concerning the main features of the internal control and risk management systems in relation to financial reporting in banks. Research studies on disclosures related to control over financial reporting have not yet been conducted. The paper uses a research method involving the analysis of annual reports disclosed by banks. The method of induction was used in the process of inference. The results of the study indicate that in the practice of reporting of banks listed on the Warsaw Stock Exchange in 2011, there was no uniform reporting form in terms of the presentation of information on internal control or risk management systems in relation to financial reporting. The disclosures were different both in terms of level of detail and content. In some banks disclosures were drawn at a high level of generality.
Źródło:
Finansowy Kwartalnik Internetowy e-Finanse; 2015, 11, 1; 1-10
1734-039X
Pojawia się w:
Finansowy Kwartalnik Internetowy e-Finanse
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Components of Comprehensive Income and Statement of Changes in Equity: An Analysis of Public Companies’ Reporting Practices in Poland and Germany
Autorzy:
Gad, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/417394.pdf
Data publikacji:
2015-09-15
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Tematy:
contribution
Islamic bank
VECM
VDC
Opis:
Purpose: Identification of methods for presenting the components of other comprehensive income in the statement of changes in equity in the reporting practices of public companies in Poland and Germany. Methodology: A�study of domestic and foreign literature was conducted with analysis of annual reports of public companies. The study followed the method of induction and to analyse the results, the structure similarity index was used. Results: The results of the study supported conclusions that the companies under study had not� developed a�uniform presentation of the components of comprehensive income in their statements of changes in equity. Five options of presenting the components of other comprehensive income in the statement of changes in equity were identified. Companies both from the WIG 30 and DAX� indices most frequently presented the statement of changes in equity in option 1, which consisted of presenting the total comprehensive income item in a�row and detailed items of equity in columns in which capital gains and losses were recognized. The differentiated forms of presenting the components of comprehensive income made it difficult to compare financial statements. Scope of research: The survey examined the annual reports of the largest Polish and German public companies respectively from the WIG 30 and DAX indices. The components of other comprehensive income presented in the statements of changes in equity were the main subject of the study. Originality: Comparative studies on the presentation of the components of other comprehensive income in the statement of changes in equity by public companies in Poland and Germany have not yet been conducted. This was therefore the research gap addressed in this study.
Źródło:
Management and Business Administration. Central Europe; 2015, 3; 71-88
2084-3356
Pojawia się w:
Management and Business Administration. Central Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Relationship Between Supervisory Board And Management And Their Communication Processes In Publicly Listed Companies In Poland / Relacje Między Radą Nadzorczą I Zarządem Oraz Proces Ich Komunikacji W Praktyce Spółek Publicznych W Polsce
Autorzy:
Gad, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/632931.pdf
Data publikacji:
2015-06-01
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
supervisory board
management
corporate governance
communication
rada nadzorcza
zarząd
nadzór korporacyjny
komunikacja
Opis:
The focal point of this study is to present the results of empirical research concerning operation of supervisory boards in the practice of companies listed on the Warsaw Stock Exchange (WSE). The main subject of interest concerns two research areas: the character of the relationship between as well as the methods and tools employed in communications between a supervisory board and management. The research paper consists of theoretical concepts regarding the supervisory boards’ tasks and the relationship between a supervisory board and a management board. Moreover, another area of interests concerns legislative changes that, according to the author, have had a great influence on functioning of supervisory boards in the practice of WSE-listed companies. The conclusions presented in the paper have been formulated on the basis of a review of the literature, analysis of pertinent regulations, and a questionnaire survey of members of supervisory boards which was conducted in September, October and November 2011 (the data was obtained by means of postal surveys).
Celem głównym niniejszego opracowania jest prezentacja wyników badania empirycznego dotyczącego działalności rad nadzorczych w praktyce spółek notowanych na GPW. Przedmiotem szczególnego zainteresowania w ramach niniejszego artykułu są dwa główne obszary badawcze: charakter relacji między radą nadzorczą i zarządem oraz sposoby i narzędzia komunikacji między tymi organami spółki. W artykule zaprezentowano różne koncepcje teoretyczne dotyczące zadań rad nadzorczych oraz relacji między radą nadzorczą i zarządem. Co więcej, w artykule wskazano zmiany legislacyjne, które zdaniem autora, miały największy wpływ na funkcjonowanie rad nadzorczych w praktyce spółek notowanych na GPW. Prezentowane w niniejszym artykule wnioski sformułowane zostały na podstawie studiów literaturowych, analizy regulacji oraz wywiadu kwestionariuszowego dokonanego wśród rad nadzorczych na przestrzeni września i listopada 2011 r. (techniką gromadzenia danych była ankieta pocztowa).
Źródło:
Comparative Economic Research. Central and Eastern Europe; 2015, 18, 2; 139-160
1508-2008
2082-6737
Pojawia się w:
Comparative Economic Research. Central and Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The pillars of internal control and risk management systems in relation to financial reporting: the perspective of the Polish and German capital markets
Filary systemów kontroli wewnętrznej i zarządzania ryzykiem w odniesieniu do sprawozdawczości finansowej – perspektywa polskiego i niemieckiego rynku kapitałowego
Autorzy:
Gad, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/516081.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Księgowych w Polsce
Tematy:
financial reporting
control over financial reporting
DAX
WIG 30
sprawozdawczość finansowa
kontrola nad sprawozdawczością finansową
Opis:
This article aims to identify, based on the reporting practices of companies listed on the Polish and German capital market, the pillars of internal control and risk management systems in relation to financial reporting. The survey examined disclosures concerning the control systems over financial reporting included in consolidated annual reports drawn up in 2013 by WIG 30 and DAX companies. Eleven main categories of information were identified. They were presented within disclosures about control systems over financial reporting. The research results indicate that the examined companies presented largely similar information on the control systems over financial reporting. It seems, however, that in the case of the DAX companies, the practice of reporting in the area of disclosures about control over financial reporting has been developed to a greater extent, i.e., the repeatability of certain items is greater. The disclosures presented by the DAX companies are more transparent compared to the disclosures presented by the WIG 30 companies. The results of research on the transparency of disclosures of companies listed on the Polish and German capital markets are consistent with the dimensions of the national cultures presented in the literature.
Celem artykułu jest identyfikacja, na podstawie praktyki sprawozdawczej spółek notowanych na polskim i niemieckim rynku kapitałowym, filarów systemów kontroli wewnętrznej oraz zarządzania ryzykiem w odniesieniu do procesu sprawozdawczości finansowej. Badaniu zostały poddane ujawnienia dotyczące systemów kontroli nad sprawozdawczością finansową, zawarte w skonsolidowanych raportach rocznych sporządzonych w 2013 roku przez spółki należące do indeksów WIG 30 oraz DAX. Zidentyfikowano 11 głównych grup informacyjnych prezentowanych w ramach ujawnień na temat systemów kontroli nad sprawozdawczością finansową. Wyniki badania wskazują, że analizowane spółki prezentowały w dużej mierze podobne informacje na temat systemów kontroli nad sprawozdawczością finansową. Wydaje się jednak, że w przypadku spółek należących do indeksu DAX w większym stopniu wypracowana jest określona praktyka sprawozdawcza w obszarze ujawnień na temat kontroli nad sprawozdawczością finansową, tzn. jest większa powtarzalność określonych pozycji. Ujawnienia prezentowane przez spółki z indeksu DAX są w większym stopniu transparentne w porównaniu do ujawnień prezentowanych przez spółki z indeksu WIG 30. Uzyskane wyniki badań dotyczące transparentności ujawnień spółek polskich i niemieckich są zbieżne z wymiarami kultur narodowych prezentowanymi w literaturze.
Źródło:
Zeszyty Teoretyczne Rachunkowości; 2016, 88(144); 37-60
1641-4381
2391-677X
Pojawia się w:
Zeszyty Teoretyczne Rachunkowości
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Content of Disclosures Concerning Control over Financial Reporting: The Perspective of Polish Listed Companies
Autorzy:
Gad, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/465600.pdf
Data publikacji:
2016-09-15
Wydawca:
Akademia Leona Koźmińskiego w Warszawie
Tematy:
financial reporting
control over financial reporting
management report
Opis:
Purpose: The aim of this study was to identify the content of disclosures presented by public companies listed on the Warsaw Stock Exchange on the internal control and risk management systems in relation to financial reporting. Methodology: The study contents were formulated with the use of literature studies. Content analysis studies and disclosure index studies were used for the study of narrative disclosures. The research was of a qualitative nature. Results: The results showed that the companies listed on the Polish capital market are still at the stage of formulating reporting practices in the area of control systems over financial reporting. It should be noted that the diversity in information presented within disclosures about control systems over financial reporting is considerable. For some companies, the disclosures are formulated at such a high level of generality that no firm conclusions can be drawn. Detailed items of disclosures presented by particular companies can be identified in the reporting practices. The findings may provide the basis for constructing an index of disclosures about control systems over financial reporting. Scope of research: The study examined disclosures about internal control and risk management systems in relation to financial reporting presented by public companies listed on the Warsaw Stock Exchange. Originality: Disclosures about internal control and risk management systems in relation to financial reporting are a relatively new issue in Polish practice. The literature studies carried out as part of the research indicate that this issue is a research gap.
Źródło:
Journal of Management and Business Administration. Central Europe; 2016, 3; 23-46
2450-7814
Pojawia się w:
Journal of Management and Business Administration. Central Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coherent structures and flow control: genesis and prospect
Autorzy:
Gad-El-Hak, M.
Powiązania:
https://bibliotekanauki.pl/articles/201471.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
smart wings
coherent structures
reactive flow control
adaptive control
machine-learning control
futuristic control systems
microsensors
microactuators
artificial intelligence
turbulent shear flows
history of flow control
history of coherent structures
inteligentne skrzydła
kontrola adaptacyjna
mikroczujniki
sztuczna inteligencja
Opis:
The genesis of both coherent structures and reactive flow control strategies is explored. Futuristic control systems that utilize microsensors and microactuators together with artificial intelligence to target specific coherent structures in a transitional or turbulent flow are considered. Of possible interest to the readers of this journal is the concept of smart wings, to be briefly discussed early in the article.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 3; 411-444
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Guide on the most important changes in provisions of the EU customs law from 1 may 2016
Przewodnik po najważniejszych zmianach w przepisach unijnego prawa celnego obowiązujących od 1 maja 2016 r.
Autorzy:
Gad, M.
Chrząszcz, A.
Powiązania:
https://bibliotekanauki.pl/articles/2051998.pdf
Data publikacji:
2016
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
guide
important change
provision
European Union
custom
legislation
Źródło:
Economic and Regional Studies; 2016, 09, 2; 126-130
2083-3725
2451-182X
Pojawia się w:
Economic and Regional Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Antyscam : Practical Web Spam Classifier
Autorzy:
Luckner, Marcin
Gad, Michał
Sobkowiak, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/226008.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
web spam detection
spam detection
imbalanced sets classification
automatic classification
machine learning
Opis:
To avoid of manipulating search engines results by web spam, anti spam system use machine learning techniques to detect spam. However, if the learning set for the system is out of date the quality of classification falls rapidly. We present the web spam recognition system that periodically refreshes the learning set to create an adequate classifier. A new classifier is trained exclusively on data collected during the last period. We have proved that such strategy is better than an incrementation of the learning set. The system solves the starting–up issues of lacks in learning set by minimisation of learning examples and utilization of external data sets. The system was tested on real data from the spam traps and common known web services: Quora, Reddit, and Stack Overflow. The test performed among ten months shows stability of the system and improvement of the results up to 60 percent at the end of the examined period.
Źródło:
International Journal of Electronics and Telecommunications; 2019, 65, 4; 713-722
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent methods of ANN type in symptom diagnostic of motocar vehicles electrical equipment
Inteligentne metody typu SSN w symptonowej diagnostyce wyposażenia elektrycznego pojazdów samochodowych
Autorzy:
Yastrebov, A.
Gad, S.
Słoń, G.
Łaskawski, M.
Powiązania:
https://bibliotekanauki.pl/articles/328946.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
sztuczna inteligencja
sieć neuronowa
diagnostyka
pojazd
artificial intelligence
neural networks
diagnostic
vehicle
Opis:
In this paper the intelligent computer diagnostic system for specified symptom models is presented. Concluding rules are executed with the help of artificial neural networks (ANN) and fuzzy neural networks (type MLP and TSK). Performed system was used for diagnosing of the vehicle's electrical equipment. Results of the computer simulations presented in the paper, carried out for the simulated and real signals, prove efficiency of the system.
W artykule przedstawiono inteligentny komputerowy system diagnostyczny dla szczególnych modeli symptomowych. Reguły wnioskujące są realizowane z pomocą sztucznych sieci neuronowych (SSN) oraz sieci neuronowo-rozmytych (typu MLP oraz TSK). Opracowany system został zastosowany do diagnozowania wyposażenia elektrycznego w pojeździe. Wyniki symulacji komputerowych przedstawione w artykule, uzyskane dla sygnałów symulacyjnych oraz zmierzonych, potwierdzają skuteczność systemu.
Źródło:
Diagnostyka; 2006, 1(37); 69-76
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid deep learning model-based prediction of images related to cyberbullying
Autorzy:
Elmezain, Mahmoud
Malki, Amer
Gad, Ibrahim
Atlam, El-Sayed
Powiązania:
https://bibliotekanauki.pl/articles/2142490.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
cyberbullying
ResNet50
MobileNetV2
support vector machine
cyberprzemoc
maszyna wektorów wsparcia
Opis:
Cyberbullying has become more widespread as a result of the common use of social media, particularly among teenagers and young people. A lack of studies on the types of advice and support available to victims of bullying has a negative impact on individuals and society. This work proposes a hybrid model based on transformer models in conjunction with a support vector machine (SVM) to classify our own data set images. First, seven different convolutional neural network architectures are employed to decide which is best in terms of results. Second, feature extraction is performed using four top models, namely, ResNet50, EfficientNetB0, MobileNet and Xception architectures. In addition, each architecture extracts the same number of features as the number of images in the data set, and these features are concatenated. Finally, the features are optimized and then provided as input to the SVM classifier. The accuracy rate of the proposed merged models with the SVM classifier achieved 96.05%. Furthermore, the classification precision of the proposed merged model is 99% in the bullying class and 93% in the non-bullying class. According to these results, bullying has a negative impact on students’ academic performance. The results help stakeholders to take necessary measures against bullies and increase the community’s awareness of this phenomenon.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2022, 32, 2; 323--334
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Methylenetetrahydrofolate reductase gene polymorphisms in Egyptian Turner Syndrome patients
Autorzy:
Ismail, Manal
Zarouk, Waheba
Ruby, Mona
Mahmoud, Wael
Gad, Randa
Powiązania:
https://bibliotekanauki.pl/articles/1038999.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
chromosomal nondisjunction
DNA methylation
folate
MTHFR gene
Turner Syndrome
Opis:
Background: Folate metabolism dysfunctions can result in DNA hypomethylation and abnormal chromosome segregation. Two common polymorphisms of the methylenetetrahydrofolate reductase (MTHFR) encoding gene (C677T and A1298C) reduce MTHFR activity, but when associated with aneuploidy, the results are conflicting. Turner Syndrome (TS) is an interesting model for investigating the association between MTHFR gene polymorphisms and nondisjunction because of the high frequency of chromosomal mosaicism in this syndrome. Objective: To investigate the association of MTHFR gene C677T and A1298C polymorphisms in TS patients and their mothers and to correlate these polymorphisms with maternal risk of TS offspring. Subjects and Methods: MTHFR C677T and A1298C polymorphisms were genotyped in 33 TS patients, their mothers and 15 healthy females with their mothers as controls using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and sequencing technique. Results: Genotype and allele frequencies of both C677T and A1298C were not significantly different between TS cases and controls. There were no significant differences in C677T genotype distribution between the TS mothers and controls (p=1). The MTHFR 1298AA and 1298AC genotypes were significantly increased in TS mothers Vs. control mothers (p=0.002). The C allele frequency of the A1298C polymorphism was significantly different between the TS mothers and controls (p=0.02). The association of A1298C gene polymorphism in TS patients was found to increase with increasing age of both mothers (p=0.026) and fathers (p=0.044) of TS cases. Conclusion: Our findings suggest a strong association between maternal MTHFR A1298C and risk of TS in Egypt.
Źródło:
Acta Biochimica Polonica; 2015, 62, 3; 529-532
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of dynamic load factors for human walking excitation for floor vibration design
Autorzy:
Nguyen, Huu Anh Tuan
Lythgo, Noel
Gad, Emad
Wilson, John
Haritos, Nicholas
Powiązania:
https://bibliotekanauki.pl/articles/2174209.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
podłoga
płyta żelbetowa
wibracja podłogi
walking excitation
step frequency
dynamic load factor
floor vibration
design guide
Opis:
This paper discusses the derivation of a set of dynamic load factors for calculation of walking response on the basis of measurements made during a biomechanics research carried out with young adults. Firstly, a quite large number of experimental data on single footstep force were collected. The single footstep forces were then superimposed to generate the force time history for a continuous walk. This was followed by the transformation of the resultant force to the frequency domain from which the dynamic load factors for the first ten harmonics of a pacing rate can be extracted. A statistical analysis was employed on the dynamic load factors to acquire their design values in terms of the 90-th or 95-th percentile. The waking force function recommended by various design guides and that developed in the paper were then used in a comprehensive finite element model to predict the vibration level of a building floor. Current design guides on floor vibration normally suggest using four harmonics in the walking force whereas load factors for ten harmonics were developed in this paper. The acceleration response of the floor was found to increase by 5-33% when walking harmonics beyond the fourth harmonic were considered. The inclusion of higher harmonics would therefore lead to a more conservative estimation of the floor response.
Źródło:
International Journal of Applied Mechanics and Engineering; 2022, 27, 3; 103--114
1734-4492
2353-9003
Pojawia się w:
International Journal of Applied Mechanics and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Insecticidal efficiency and safety of zinc oxide and hydrophilic silica nanoparticles against some stored seed insects
Autorzy:
Haroun, S.A.
Elnaggar, M.E.
Zein, D.M.
Gad, R.I.
Powiązania:
https://bibliotekanauki.pl/articles/2084748.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Callosobruchus maculatus
hydrophilic silica nanoparticles
Sitophilus oryzae
Tribolium castaneum
wheat
zinc oxide nanoparticles
Opis:
The present study was conducted to evaluate the insecticidal efficiency and safety of zinc oxide nanoparticles (ZnO NPs) and hydrophilic silica nanoparticles (SiO2 NPs) against: adults of rice weevil (Sitophilus oryzae L.); red flour beetle (Tribolium castaneum Herbst.) and cowpea beetle (Callosobruchus maculatus F.) results showed that, both ZnO NPs and hydrophilic SiO2 NPs exhibited a significant toxic effect (df, F and p < 0.5) against S. oryzae and C. maculatus at the highest concentration while T. castaneum showed high resistance against the two tested materials. At the end of the experiment, recorded mortality was: 81.6, 98.3 and 58.3% at the highest concentration used for each insect (0.3, 2 and 8 gm ⋅ kg–1 of SNPs with C. maculatus, S. oryzae and T. castaneum, respectively), while mortality was 88.3, 100 and 38.3% at the highest concentration used for each insect (0.6, 2.5 and 8 gm ⋅ kg–1 of ZnO NPs with C. maculatus, S. oryzae and T. castaneum, respectively). Both tested materials caused high reductions in F1-progeny (%) with C. maculatus and S. oryzae. Histopathological examination of male mice livers showed hepatic architecture with congested blood sinusoids, binucleated hepatocytes nuclei, dilated central vein and margainated chromatin in some nuclei. Histopathological assessment of the lungs showed normal histoarchitecture. There were no differences in alveolar septa, bronchiolar and epithelium of the treated and untreated animals. Silica and zinc oxide nanoparticles have a good potential to be used as stored seed protectant alternatives if applied with proper safety precautions.
Źródło:
Journal of Plant Protection Research; 2020, 60, 1; 77-85
1427-4345
Pojawia się w:
Journal of Plant Protection Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of a Subjective Grading System and Blending with Polyester on Selected Wool and Yarn Characteristics of Subtropical Egyptian Barki Sheep
Ocena właściwości przędz mieszanych wełna/poliester
Autorzy:
Helal, Ahmed
Agamy, Rania
Gad Allah, Aymen A. I.
Al-Betar, Essam M.
Mahouda, Sabry F.
Abdel-Mageed, Ibrahim I.
Powiązania:
https://bibliotekanauki.pl/articles/232691.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
wool
yarn
strength
elongation
friction
polyester blends
wełna
przędza
wytrzymałość
wydłużenie
tarcie
mieszanka wełna-poliester
Opis:
Seven-hundred kilograms of subtropical Barki wool was collected to study the effect of a subjective grading system and blending with polyester on selected wool and yarn characteristics. Wool was graded subjectively into coarse, fine and raw; then each grade was blended with 0%, 15%, 25%, 35% and 45% of polyester. Staple and yarn strengths were higher in both coarse and fine grades compared with raw wool. Staple elongation of the fine grade reached 3 times that of coarse grade and twice as much as raw grade. Also, in the 100% wool blend, yarn elongation of the fine grade was twice as much as both coarse and raw grades. The fine grade had the highest yarn friction, followed by other grades. Generally, adding polyester to coarse and fine grades led to an improved yarn strength compared with the raw grade. Adding 15% polyester caused the highest improvement among other percentages. Correlations among traits were also discussed.
Do badań wykorzystano 700 kg wełny. Dokonano oceny wybranych właściwości wełny i przędz mieszanych wełna/poliester. Wełna była oceniana subiektywnie na grubą, cienką i surową; następnie każdy gatunek został zmieszany z 0%, 15%, 25%, 35% i 45% poliestru. Zbadano wytrzymałość, wydłużenie i współczynnik tarcia przędz. Stwierdzono, że, dodawanie poliestru do grubych i cienkich włókien wełnianych prowadziło do polepszenia wytrzymałości przędz w porównaniu do przędz z włókien surowych. Największą poprawę właściwości spowodowało dodanie 15% poliestru. Omówiono również korelacje między cechami.
Źródło:
Fibres & Textiles in Eastern Europe; 2019, 5 (137); 23-27
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-14 z 14

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