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  1. 5 Izolacje
  2. 3 Archives of Foundry Engineering
  3. 3 Świat Szkła
  4. 2 Archives of Civil and Mechanical Engineering
  5. 2 Elektronika : konstrukcje, technologie, zastosowania
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  1. 2 Brauer H.
  2. 2 Hackiewicz H.
  3. 2 Lesiak P.
  4. 2 Uhlig R.P.
  5. 2 Zec M.
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  1. 1 2024
  2. 2 2023
  3. 4 2022
  4. 3 2021
  5. 3 2020
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1
Content available remote Termomodernizacja ścian zewnętrznych o niedostatecznej izolacyjności termicznej. Wstęp do diagnostyki technicznej
Choromański Stanisław
Izolacje
|
2024
|
T. 29, nr 11/12
116--118, 120--124
PL
Artykuł przedstawia proces wyboru wariantu termomodernizacji ścian zewnętrznych o niedostatecznej izolacyjności termicznej ze szczególnym uwzględnieniem diagnostyki technicznej poprzedzającej inwestycje. Autor podaje wady występujące na elewacjach i kryteria doboru ekspertów od diagnostyki oraz zasady wykonania oględzin, badań technicznych, a także finalnych ocen i rekomendacji z uwzględnieniem norm prawnych i zasad sztuki budowlanej.
EN
The article presents the process of selecting a thermal modernization option for external walls with insufficient thermal insulation, with detailed reference to pre-investment technical diagnostics. The author outlines the existing defects on the facades and the criteria for selecting diagnostic experts, along with the principles of visual inspections, technical tests, final assessments and recommendations in accordance with legal norms and good building practice.
2
Content available Quantitative Prediction of Air Entrainment Defects in Casting Filling Process
Yin Yajun, Xie Yao, Song Yingchen, Shen Xu, Ji Xiaoyuan, Zhou Jianxin
Archives of Foundry Engineering
|
2023
|
Vol. 23, iss. 4
117--126
EN
Air entrainment defect is a common type of defect in the casting process, which will seriously affect the quality of the casting. Numerical simulation technology can predict the occurrence of casting defects according to the evolution law of liquid metal in the process of filling and solidification. The simulation of air entrainment process is a hot and difficult issue in the field of numerical simulation. The evolution law of air entrainment and the tracking of induced bubbles in the process of metal filling are still lacking. So is the quantitative prediction of trained gas. In this paper, based on the numerical simulation software of Inte CAST, this paper proposes an algorithm for air entrainment search and tracking, which is used to develop a quantitative prediction system for air entrainment. The feasibility of the system is verified through the simulation calculation of the typical test pieces of the air entrainment and the prediction of air entrainment defects of the casting in the process of filling is obtained through the simulation calculation of the actual casting, which can provide a certain guiding role for the optimization of the process in the production practice.
3
Content available remote Enhancing heat and mass transfer to suppress void defects in friction stir welding by superimposing ultrasonic vibration
Wang Xue, Zhang Xiankun, Shi Lei, Wu Chuangsong, Chen Gaoqiang
Archives of Civil and Mechanical Engineering
|
2023
|
Vol. 23, no. 4
art. e256, 1--16
EN
Heat and mass transfer in the process of friction stir welding (FSW) determine the weld formation quality. Meanwhile, the formation of voids in FSW limits welding speed improvement and welding efficiency. Although superimposing ultrasonic vibration can be adopted as an effective means to restrain the formation of voids, the potential suppression mechanism was still unrevealed. Herein, a multi-physical model using the shear stress boundary conditions was put forward to quantitatively study the influence of ultrasonic vibration on the heat and mass transfer behaviors and the resulting weld formation which was also validated experimentally. Our results show that ultrasonic vibration in FSW slightly enhances the heat flux at the tool-work piece interfacial contact surface as well as the plastic deformation heat generation near the tool. Therefore, the high-temperature area (higher than 690 K) near the tool pin side increases from 2.11 to 2.29 mm. The slightly higher heat rate and temperature enhance the fluidity of plastic material, resulting in an obvious increase in the flow velocity. As a consequence, the plastic material moves farther to fill the cavity at the rear advancing side, which is conducive to eliminating the void defects. The maximum strain rate on z = 2 mm horizontal plane at the AS is 206.7 s−1 in UVeFSW, while it is 13.5 s−1 in CFSW. The strain rate of the contact interface on AS increases by nearly 5 times, which implies an enhanced plastic material flow and is the main reason for suppressing void defects by superimposing ultrasonic vibration in FSW.
4
Content available Generation Z in uncertain time of Sars-Cov-2 – how do they feel far away from office?
Żarczyńska-Dobiesz Agnieszka, Chomątowska Barbara, Janiak-Rejno Iwona, Strugała Andrzej
Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska
|
2022
|
z. 159
513--524
EN
Purpose: In response to the outbreak of the Covid-19 pandemic, many employers have decided to switch to remote work. This form of work has become a new professional reality for employees representing all generations. Each of them in their own way found themselves in these new working conditions. The article focuses on the experience of the youngest cohort of workers in this regard. The main goal of the paper is to recognize the experience of Generation Z employees in the area of remote work and to identify key factors that, in the opinion of representatives of Generation Z, favor or limit remote work in an uncertain time of Covid-19. Design/methodology/approach: The authors conducted a diagnostic survey with a survey questionnaire. The questionnaire was carried out using the CAWI method. It was filled in by 334 respondents who represent Generation Z, professionally active, who worked remotely during the pandemic. As many as 310 questionnaires were selected for the final analysis. Findings: Young people like the model of remote work because they can derive many benefits from it. Representatives of Generation Z wonder whether the return to office work will deprive them of their privileges and make them submit to a certain discipline and rules applicable there. Research limitations/implications: Due to the limitations of the research sample it is important to underline that generalizing the research results must be done with caution. The authors of the article intend to continue the research carried out on the discussed topic, as well as in the field of adaptability to remote work of other three generations: Y, X, and BB. Practical implications: Recognition of experience of both employers and young employees in the field of remote work, there is a great opportunity for new solutions in HRM and work management, more relevant to the challenges of the pandemic and post-pandemic world of work. Originality/value: The paper analyzes the remote work experience of employees in pandemic reality. Its value is to look at the issue from the perspective of the experience of the youngest employees representing Generation Z. The article is addressed to human resources managers.
5
Porównanie różnych metod usuwania powietrza ze szkła pre-laminowanego
Oran Serhat
Świat Szkła
|
2022
|
R. 27, nr 7
34--37
6
Content available Investigation of defective reinforced concrete beams with obtained damage of compressed area of concrete
Blikharskyy Zinoviy, Lobodanov Мaksym, Vegera Pavlo
Production Engineering Archives
|
2022
|
Vol. 28, Iss. 3
225--232
EN
In the building industry, it is a frequent cause of damage to elements at different stages: during transportation, operation, installation, etc. Since replacing an element is not always possible due to various circumstances, it entails significant financial losses, logistics, and others. For this reason, the expediency of studying the effect of damage on the bearing capacity of reinforced concrete elements is growing. This effect is dependent on its type and has significant variability. In the case of the combination of the defect and damage in reinforced concrete elements, the complexity of the research of this element increases significantly. In this article is discussed: a review of damaged reinforced concrete elements; researching the influence of the damage and additional factors on the element; developed testing methodology for bending reinforced concrete elements with damage to concrete in a compressed zone with insufficient reinforcement, when performing damage to the action of the load and during the action of the load, is presented; the influence on the deformability and bearing capacity of the variability of damage on the sample with insufficient reinforcement is reflected, taking into account the factor of change in the load at which the damage is performed; a comparison is made of the dependence of the change in the actual height of the compressed zone on the change in the load on the elements; implementation of conclusions on the result of the study.
7
Content available remote Polimocznik jako materiał wzmacniający konstrukcje w budownictwie
Szafran Jacek, Matusiak Artur
Izolacje
|
2022
|
R. 27, nr 2
92, 94--95
PL
Praca jest opisem badań wykonanych w ramach projektu badawczego „Polyurea coatings as possible reinforcement system”. Zasadniczym założeniem artykułu jest ocena przydatności powłok polimocznikowych do poprawy charakterystyki pracy elementów konstrukcji budowlanych. Na potrzeby opracowania wykonano podstawowe badania polimocznika, proste testy fizyczne i eksperymenty w skali naturalnej. Na tej podstawie przeprowadzono analizę wyników wraz z oceną właściwości powłoki i jej wpływu na elementy budowlane. Wyniki analizy wykazały, że zastosowanie powłoki z polimocznika zapewnia zachowanie integralności po przekroczeniu nośności elementów konstrukcji, a także pozwala poprawić inne walory użytkowe konstrukcji.
EN
The study is a description of the research carried out as part of the research project “Polyurea coatings as possible reinforcement system”. The main assumption of the article is to assess the suitability of polyurea coatings to improve the performance characteristics of building structure elements. For the purposes of the study, basic polyurea studies, simple physical tests and naturalscale experiments were performed. On this basis, the results were analysed along with the assessment of the properties of the coating and its impact on building elements. The results of the analysis showed that the use of a polyurea coating ensures that the integrity is maintained when the load capacity of the structure elements is exceeded; other functional values of the structure are also improved.
8
Content available remote Zasady nadzoru zdalnego
Dwojak Adam
Instal
|
2021
|
nr 4
5--7
9
Content available Development of a device for measuring and analyzing vibrations
Stakhova Anzhelika, Kvasnikov Volodymyr
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
|
2021
|
T. 11, nr 2
48--51
EN
It is known that vibration is generated to one degree or another by all moving parts of machines. Vibration processes arising in the process of functioning of machines and equipment are highly informative, reflecting the technical condition of many parts and assemblies quite fully. Therefore, the use of vibration diagnostics systems makes it possible to determine a defect even at the stage of inception, thereby excluding emergency stops of machinery. An urgent task is to create a vibration analysis device, which consists of a sensor for measuring vibration, the principle of operation of which is based on the use of a direct piezoelectric effect. The output signal of the sensor will go to a personal computer or any other device with the Windows operating system, where a spectral analysis of the measured vibration signal is carried out using a Matlab-based diagnostic program.
PL
Wiadomo, że wibracje w mniejszym lub większym stopniu są generowane przez wszystkie ruchome części maszyn. Procesy wibracyjne powstające w trakcie pracy maszyn i urządzeń mają bardzo bogaty charakter informacyjny, w pełni odzwierciedlając stan techniczny wielu części i zespołów. Dlatego zastosowanie systemów diagnostyki drganiowej pozwala na określenie usterki już na etapie jej powstania, wykluczając tym samym awaryjne zatrzymania maszyn. Pilnym zadaniem jest stworzenie urządzenia do analizy drgań, które składa się z czujnika do pomiaru drgań, którego zasada działania opiera się na wykorzystaniu bezpośredniego efektu piezoelektrycznego. Sygnał wyjściowy czujnika trafia do komputera osobistego lub innego urządzenia z systemem operacyjnym Windows, gdzie analiza widmowa mierzonego sygnału drgań jest przeprowadzana za pomocą programu diagnostycznego opartego na Matlabie.
10
Content available Zastosowanie oraz perspektywy rozwoju druku 3D
Powroźnik Michał
Archiwum Wiedzy Inżynierskiej
|
2021
|
T. 6, Nr 2
28--30
PL
Na przestrzeni lat technologia druku 3D rozwinęła się na tyle, że coraz częściej wykorzystywana jest w przedsiębiorstwach produkcyjnych, inżynierii biomedycznej oraz gospodarstwach domowych. W artykule przedstawiono najważniejsze zagadnienia związane z drukarkami i technologią druku 3D. Przedstawiono sposób powstawania przedmiotów metodą przyrostową oraz jej zalety i wady. Wymieniono i opisano zastosowania druku 3D, a także jego perspektywy i kierunek rozwoju.
EN
Over the years, 3D printing technology has developed to such an extent that it is increasingly used in manufacturing companies,biomedical engineering and households. The article presents the most important issues related to printers and 3D printing technology. The method of creating items with the incremental method as well as its advantages and disadvantages is presented. The application of 3D printing was mentioned and described, as well as its prospects and direction of development.
11
Content available Analysis procedure of inspection errors based on MSA attribute study data set for the improvement purposes: Part 2 - results and discussion
Knop Krzysztof
Quality Production Improvement - QPI
|
2020
|
Vol. 2, Iss. 1
162--171
EN
In the first article in this series, the research methodology concerning the analysis of inspection errors based on MSA attribute study data set for the improvement purposes was presented. In the final article in the series, applying the methodology in practice step by step was presented. Instructions for correct performance of the analysis, in compliance with the author's procedure, were determined. Both advantages and disadvantages of the developed approach were underlined.
12
Content available remote Ocieplenie przegród od wewnątrz z uwzględnieniem wymagań cieplno wilgotnościowych od 1 stycznia 2021 r.
Pawłowski Krzysztof
Izolacje
|
2020
|
R. 25, nr 6
32--41
PL
W artykule przedstawiono charakterystykę wybranych materiałów termoizolacyjnych stosowanych przy ociepleniu od strony wewnętrznej. Zaprezentowano także wyniki obliczeń parametrów fizykalnych przegród zewnętrznych i ich złączy z uwzględnieniem wymagań cieplno-wilgotnościowych obowiązujących od 1 stycznia 2021 r. Zostały omówione przykładowe rozwiązania materiałowe dociepleń od strony wewnętrznej, izolacyjność cieplna ścian zewnętrznych ocieplonych od wewnątrz oraz kształtowanie parametrów fizykalnych złączy przegród ocieplonych od wewnątrz.
EN
This paper presents the characteristics of selected thermal insulation materials used for insulation of internal walls. It also presents the results of physical parameters calculations for external partitions and their joints in view of thermal and humidity requirements entering into force on 1 January 2021. Model materials for internal side thermal insulation, thermal insulating power of walls insulated on the interior side and physical parameters of joints of internally insulated partitions have been discussed.
13
Content available remote Ocena Techniczna systemów ociepleń ETICS i przyczyny uszkodzeń
Rokiel Maciej
Izolacje
|
2020
|
R. 25, nr 2
34, 36--38
PL
Przedmiotem artykułu jest ocena techniczna systemów ociepleń ETICS. Zaczyna się on od charakterystyki tego systemu. Następnie omawiane są zasady projektowania ociepleń w tym systemie z uwzględnieniem analizy przyjętych rozwiązań pod kątem praw fizyki i zasady stosowania termoizolacji. Druga część poświęcona jest wykonawstwu, ze szczególnym uwzględnieniem przyczyn wad i usterek oraz przyczyn uszkodzeń ocieplanych elewacji.
EN
The subject of this Article is the technical assessment of ETICS insulation systems. It starts with the characteristics of this system. Then the principles of thermal insulation design in this system are discussed, taking into account the analysis of the adopted solutions in terms of the physical law and the principle of applying thermal insulation. The second part is devoted to the workmanship, with particular emphasis put on the defect and fault as well as damage causes in relation to the insulated facades.
14
Content available Defects and Incompatibilities of Pipes Manufactured by Pilgrim Method
Biś Jesica, Koczurkiewicz Bartosz, Mazur Igor
New Trends in Production Engineering
|
2019
|
Vol. 2, Iss. 2
24-35
EN
The increase in the quality requirements for the pipes and the increasing needs to reduce production costs, while increasing the efficiency of the process in market of hot rolled pipes are observed. One of the cost reduction factors is the reduction of the number of defects by early detection and, if possible, the removal of non-conformities. Incompatibility is an error that can be removed in accordance with the performance standard that does not cause defects (Norma API). The defect is imperfection that is so important that it is the basis for the removal of the product or its part based on the criteria set out in the performance standards. In pipe manufacturing processes, defects and batch incompatibilities can be distinguished, which arise in the steelworks during metal solidification and roll forming in the course of metal processing. The defect may also arise as a result of removing steel material or result from rolling processes defects. The paper presents the analysis of the process of quality control of pipes manufactured using the pilgrim method on the basis of real process data. The analysis were involved 1070 pieces of ingots from 11 different melts for rolling pipes. At various stages of production, discrepancies and defects were revealed, which were caused by metallurgical or technological defects associated with rolling pipes. The total amount of discrepancies and defects eliminated 168 pieces of finished pipes. The aim of the work is to show that by means of appropriately selected methods of eliminating imperfections, it is possible to increase the efficiency of the manufacturing process.
15
Content available remote Analiza termograficzna stolarki okienno-drzwiowej - identyfikacja wad izolacji termicznej budynków mieszkalnych na obszarze południowego Podlasia
Tokarski Daniel, Ickiewicz Irena, Żukiewicz-Sobczak Wioletta
Izolacje
|
2019
|
R. 24, nr 7/8
42, 44--47
PL
Predmiotem badań opisanych w artykule byty obiekty mieszkalne zlokalizowane na obszarze południowego Podlasia, a celem pomiarów była ocena stanu izolacyjności cieplnej obiektów budowlanych. Podczas procesu oceny izolacyjności cieplnej budynku oraz wizualizacji mostków cieplnych za pomocą kamery termowizyjnej zrealizowano dodatkowo badania przy pomocy kwestionariusza ankiety, na zasadzie doboru losowego respondentów dzięki którym określono cechy badanych obiektów. Na podstawie przeprowadzonych badań i otrzymanych w procesie pomiarów termowizyjnych wyników poinformowano o lokalizacji mostków powodujących straty ciepła, przyczynach ich powstawania, a także sposobach ich niwelacji.
EN
The subject of research described in the article were residential structures in southern Podlachia, and the purpose of the measurements was the evaluation of the condition of thermal insulation capacity of structures. During the insulation capacity evaluation process of buildings and the visual presentation of thermal bridges using thermal vision cameras, the research was expanded using a survey conducted among a random group of respondents, thanks to which the properties of the analysed structures were determined. On the basis of the conducted research and the thermal vision measurements acquired in course of the process, bridges were found that cause thermal losses, along with the reasons of their emergence and the modes of their removal.
16
Content available Rower elektryczny jako alternatywny środek indywidualnego transportu metropolitalnego
Ficoń Krzysztof
Gospodarka Materiałowa i Logistyka
|
2019
|
nr 5
176--196, CD
PL
Celem pracy było zaprezentowanie idei funkcjonowania roweru elektrycznego jako nowoczesnej alternatywy wobec roweru klasycznego i jego walorów techniczno-użytkowych oraz perspektyw rozwojowych w infrastrukturze systemów transportowych. W kolejnych częściach omówiono zasadę działania roweru elektrycznego, stosowane obecnie rozwiązania technicznokonstrukcyjne i zasadnicze zalety i wady tego pojazdu. Szczególną uwagę zwrócono na uwarunkowania prawno-legislacyjne i aktualne trendy rynkowe rowerów elektrycznych w Unii Europejskiej i w Polsce. Omówiono też wybrane modele współczesnych rozwiązań konstrukcyjnych przodujących firm światowych.
EN
The aim of the work was to present the idea of electric bicycle operation as a modern alternative to classic bicycle and its technical and utility values as well as development prospects in the infrastructure of transport systems. The following sections discuss the principle of electric bicycle operation, currently used technical and construction solutions and the essential advantages and disadvantages of this vehicle. Particular attention was paid to the legal and legislative conditions and current market trends of electric bicycles in the European Union and Poland. Selected models of modern construction solutions of leading global companies were also discussed.
17
Content available Manufacturing Scheme of Spherical Grinding Bodies from Abrasion-Resistant Cast Iron Free of Shrinkage Defects
Pustovalov D. O., Ablyaz T., Muratov K. R., Sharov K. V., Bogomyagkov A. V., Shumkov A. A.
Archives of Foundry Engineering
|
2019
|
iss. 3
66--71
EN
This work presents a scheme for the manufacture of spherical grinding bodies used in grinding and crushing machinery as a grinding medium from abrasion-resistant cast iron CHKH16 (according to GOST 7769-82) free of shrinkage defects produced by casting into single sand molds with a vertical joint and by usingcoolers. The grinding efficiency in terms of material destruction and energy consumption has been studied according to a wide range of operating parameters and new scheme for calculating the sprue and supply system has been developed by the authors of the article. Its functionality has been substantiated, particularly the use of a central riser acting as a head and the use of coolers. The conducted numerical simulation has shown the dependence of a solid phase formation over time, which characterizes the direction of the system crystallization and determines the locations of the shrinkage defects concentration. The manufacture of the grinding body with a 100 mm diameter using the considered technology is presented in this paper.
18
Content available remote Taxonomy of non-destructive field tests of bridge materials and structures
Bien Jan, Kaminski Tomasz, Kuzawa Mieszko
Archives of Civil and Mechanical Engineering
|
2019
|
Vol. 19, no. 4
1353--1367
EN
Bridges generally are susceptible to deterioration, thus in such a situation precise informa-tion on characteristics and condition of their materials and structural systems based on results of diagnostic procedures is crucial for safety of the structures and users of the transportation infrastructure and also for efficient management of bridge asset. The main purpose of this work is to propose an approach to integrated classification of contemporary non-destructive field tests as a part of general strategy of diagnostic investigations of bridge materials and structures. Analysis of the most frequent degradation stimulators and mechanisms as well as main classes of bridge defects form a background for presented classification of diagnostic tests. The classification includes load-independent and load-dependent testing strategies and takes into account type of tested material and diagnostic goals: geometry identification, assessment of materials characteristics and quality, detec- tion of defects and degradation processes as well as monitoring of bridge structure response to loads and environmental influences.
19
Content available Mechanical Characterisation of Carbon Fibre-Reinforced Plastics with Defined Defects
Ashir M., Bardl G., Hahn L., Nocke A., Cherif C.
Fibres & Textiles in Eastern Europe
|
2018
|
Vol. 26, no. 6 (132)
126--132
EN
A steadily increasing application of fibre-reinforced plastics in the field of lightweight construction has been observed in the course of the past two decades. Currently a major challenge in the growing high technology market is the quality assurance of manufactured fibre-reinforced plastic components. During different stages in the manufacturing process of fibre-reinforced plastics, defects of different types and sizes are enclosed in them, exerting a destructive influence on the performance of fibre-reinforced plastics in various practical applications in terms of strength, stiffness and brittleness. Thus the aim of this research project was to investigate the effect of defined local defects on the mechanical properties,such as tensile, flexural and impact properties, of fibre-reinforced plastics, in particular carbon fibre-reinforced plastics. Results show that these mechanical properties depend significantly on the type and size of defect.
PL
W ciągu ostatnich dwóch dekad zaobserwowano stale rosnące zastosowanie w dziedzinie lekkich konstrukcji tworzyw sztucznych wzmocnionych włóknami. Obecnie dużym wyzwaniem na rosnącym rynku wysokich technologii jest wyprodukowanie wysokiej jakości komponentów z tworzyw sztucznych wzmocnionych włóknami. Podczas różnych etapów procesu wytwarzania tworzyw sztucznych wzmacnianych włóknami pojawiają się defekty różnego rodzaju i rozmiarów wywierające destrukcyjny wpływ na działanie tworzyw sztucznych wzmacnianych włóknami w różnych praktycznych zastosowaniach pod względem wytrzymałości, sztywności i kruchości. Celem pracy było zbadanie wpływu określonych defektów lokalnych na właściwości mechaniczne, takie jak właściwości rozciągające, zginające i uderzeniowe. Wyniki pokazały, że właściwości mechaniczne zależą w znacznym stopniu od rodzaju i rozmiaru defektu.
20
Content available Opracowanie sposobu prowadzenia analizy awaryjności wtryskarek w oparciu o metodę FMEA
Michalski K., Kunat D.
Systemy Wspomagania w Inżynierii Produkcji
|
2017
|
Vol. 6, iss. 7
183--190
PL
Współczesne wtryskarki są skomplikowanymi, wielofunkcyjnymi maszynami do przetwórstwa tworzyw sztucznych. Najczęstszą przyczyną nieoczekiwanych przerw w produkcji jest awaryjność maszyn. W artykule zaprezentowano sposób prowadzenia analizy awaryjności wtryskarek na etapie użytkowania maszyny. Zidentyfikowane zostały występujące awarie, następnie zostały one zhierarchizowane w oparciu o kryterium częstotliwości występowania oraz ustalono przyczyny ich powstawania.
EN
Contemporary injection molding machines are complex multifunctional plastic processing machines. The most common cause of unexpected break in production is the failure of machines. The article presents the method of analyzing the failure rate of injection molding machines during the machine use stage. Identified occurrence of accidents, then they were hierarchical based on the frequency of occurrence and the cause of their occurrence.
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