Ograniczanie wyników
Czasopisma help
Autorzy help
Lata help
Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 188

Liczba wyników na stronie
first rewind previous Strona / 10 next fast forward last
Wyniki wyszukiwania
Wyszukiwano:
w słowach kluczowych:  productivity
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 10 next fast forward last
EN
This study demonstrates application of Lean techniques to improve working process in a sewing machine factory, focusing on the raw material picking process. The value stream mapping and flow process chart techniques were utilized to identify the value added activities, non-value activities and necessary but non-value added activities in the current process. The ECRS (Eliminate, Combine, Rearrange and Simplify) in waste reduction was subsequently applied to improve the working process by (i) adjusting the raw material picking procedures and pre-packing raw material as per demand, (ii) adding symbols onto the containers to reduce time spent in picking material based on visual control principle, and (iii) developing and zoning storage area, identifying level location for each row and also applying algorithms generated from a solver program and linear programming to appropriately define the location of raw material storage. Improvement in the raw material picking process was realized, cutting down six out of 11 procedures in material picking or by 55%, reducing material picking time from 24 to 4 min or by 83%. The distance to handle material in the warehouse can be shortened by 120 m per time or 2,400 m per day, equal to 86% reduction. Lean techniques proved to provide significant improvement in sewing machine company operations.
EN
Regulation in seaports broadly covers port safety, security, pollution and terminal operations which generally fall within the purview of national government’s administrative authority. Port deregulation policy in the era of global port reforms beginning in 1990’s, was introduced to limit government interference in commercial aspects of port operations, attract private sector funding and improve port productivity etc. However, in unregulated port market environment, the involvement of private sector in port terminal management can arguably generate risk of collusion especially among terminal operators offering the same or similar services. This paper examined port user welfare following private sector participation in a deregulated port environment. The Nigeria’s port terminal concession policy implementation was analysed as case study. From the findings, we demonstrated the essence for and role of economic regulator in ensuring that optimal port user welfare gains were achieved and maintained in post port reform regime.
PL
W artykule przedstawiono charakterystykę rud żelaza i koncentratów pod kątem oceny ich wpływu na proces spiekania oraz na właściwości fizykochemiczne spieku. Opisano metodykę prowadzenia laboratoryjnych prób spiekania na misie z wykorzystaniem istniejącej w Zespole Procesów Surowcowych Łukasiewicz - Instytutu Metalurgii Żelaza linii do półprzemysłowej symulacji procesu spiekania rud żelaza i odpadów jak i innych urządzeń pomocniczych. Zamieszczono również wyniki dotyczące wpływu udziału różnych składników pylastych (koncentratów), drobnoziarnistych rud żelaza (aglorud) i dodatku wapna palonego do mieszanki na podstawowe parametry procesu spiekania. Zaprezentowano również wyniki badań właściwości wyprodukowanego spieku z różnych mieszanek spiekalniczych.
EN
The article presents the characteristics of iron ores and concentrates in terms of assessing their impact on the sintering process and on the physicochemical properties of the sinter. The article describes the methodology for conducting laboratory sintering tests on a pan using the line for semi-industrial simulation of sintering of iron ore and waste as well as other auxiliary devices at the Primary Processes Unit of the Łukasiewicz - Institute of Ferrous Metallurgy. The results of the influence of various dusty components (concentrates), fine-grained iron ores (sinter ores) and addition of quicklime to the mixture on the basic parameters of the sintering process are also included. The results of tests on the properties of sinters made from various sintering mixtures are also presented.
EN
The use of direct drives in linear and rotary axes as well as increased power density of main drives offer the potential to raise feet rate, acceleration and thus allow higher productivity of machine tools. The induced heat flow rates of these drives could lead to thermo-elastic deformations of precision related machine tool components. In order to reduce thermally caused displacements of the tool-center-point and to prevent a negative impact on the achievable accuracy, the induced heat flow rates of main drives must be dissipated by effective cooling systems. These systems account for a major share of the machine tool’s total energy consumption.With the intention to overcome the area of conflict regarding productivity and energy efficiency, a so called thermoelectric self-cooling system has been developed. To convert a proportion of thermal losses into electrical energy, thermoelectric generators are placed in the heat flow between the primary part of a linear direct drive and the cooling system. The harvested energy is directly supplied to a pump of the water cooling circuit, which operates a decentralised cooling system with reasonable coolant flow rates. For predicting the thermoelectric system behaviour and to enable a model-based design of thermoelectric self-cooling systems, a thermal resistance network as a system simulation in MATLAB/Simulink is presented. The model is applied to a feed unit with a linear direct drive and allows the calculation of harvested energy as well as the simulation of steady and transient states of the cooling system. The comparison of simulative and experimental determined data indicates a predominantly high model prediction accuracy with short simulation times. At an early stage of development the model turns out to be a powerful tool for design and analysis of water flow thermoelectric self-cooling systems.
EN
The article investigates and substantiates the operating modes of a container-modular equipment with active ventilation, such as specified (real) productivity, power consumption of the conveying process, as well as the use of a progressive method of controlling the humidity and temperature in soybean storage volume. Experimental equipment is developed which adequately simulates the proposed technology for soybean storage with active ventilation for the calculated data verification. The experiments confirm that the proposed experimental equipment makes it possible to adequately simulate the process of soybean storage with active ventilation and conduct experiments with the regulation of basic parameters such as productivity, power consumption, humidity, etc. using modern methods, devices and digital technologies. Experimental results are presented. Along with this, using the “Strazh Klimat” software, humidity and temperature are monitored during the experiments. Experimental data are obtained by the use of which it is possible to establish the dependence of the conveying height on the air flow velocity.
EN
Spring wheat is the main export crop in Kazakhstan. The main share of the grain sold on the world market is the grain of spring wheat grown in Northern Kazakhstan, where the acreage used for this crop reaches 85%, which is about 10 mln ha. Moisture deficiency is the main limiting factor in increasing the yield of spring wheat; in this region, the average annual precipitation is 320–350 mm. Droughts of varying intensity have periodically occurred 2–3 times within the previous five years. Therefore, the yield variability is high and reaches 30% or more. Another reason for the low yield is the occurrence of wheat diseases. Brown rust and Septoria blight are the most common diseases in the region. Upon the joint manifestation of these diseases, the loss of grain yield may reach 30–40%. The research was aimed at creating a drought-resistant, productive, high-quality variety of spring wheat adapted to changes in the environmental conditions. The method of studying has been generally adopted in breeding and genetic studies. In the competitive grade testing, 40 promising lines of spring soft wheat were studied. Line 371/06 had an average yield of 2.54 t/ha, which was higher by 0.48 t/ha than in the standard, and ripened at this level. Over the three years of study, this line has significantly exceeded the Astana variety in terms of the yield. Line 371/06, which has Lr37/Sr38 genes in its genotype, is characterized by group resistance to brown and stem rust. The content of protein in this line amounted on average to 15.22%, which was by 1.38% higher than in the standard Astana variety. By the gluten content, the excess over the standard reached 2.8%. Over the three years of studying the 40 spring wheat lines, line 371/06 has been chosen, which is high-yielding, resistant to droughts, leaf and stem rust, and is of high grain quality. In 2018, line 371/06 was sent for state grade testing under the name of Taymas.
EN
Hospitals are the most important and costly component of the healthcare system. Therefore, hospital performance evaluation (HPE) is an important issue for the managers of these centres. This paper presents a new approach for HPE that can be used to calculate the efficiency, effectiveness, and productivity of hospitals simultaneously. Efficiency refers to the ratio of inputs and outputs, effectiveness refers to the extent to which outputs align with predetermined goals, and productivity refers to the sum of both efficiency and effectiveness. To this end, a Data Envelopment Analysis (DEA) model is developed to simultaneously measure the efficiency, effectiveness, and productivity (DEA-EEP) of hospitals. DEA is a linear programming technique that in its traditional form, calculates the performance of similar decisionmaking units (DMUs) that have both inputs and outputs. In this study, the inputs are the number of health workers, the number of other staff, and the number of patient beds; while the outputs are the bed occupancy rate and the bed turnover rate. A target value is set for each output to measure the effectiveness of hospitals. The advantage of the developed model is the ability to provide a solution for non-productive units so that they can improve their performance by changing their inputs and outputs. In the case study, data of 11 hospitals in Tehran were evaluated for a 3-year period. Based on the results, some hospitals experienced an upward trend in the period, but the efficiency, effectiveness, and productivity scores of most hospitals fluctuated and did not have a growing trend. This indicates that although most hospitals sought to improve the quality of their services, they needed to take more serious steps.
EN
For years, management of companies has been turning to proven techniques and tools to achieve even higher productivity. They hope for, if possible, all-inclusive, easy and efficient procedures to manage their production systems. In principle, this applies to all organizations, regardless of the sector or the company focus. Especially in industrial enterprises with different machines and equipment for production processes, the quantitative indicator „Overall Equipment Effectiveness“ (OEE) has been used in recent years as a key indicator to monitor their efficiency and process performance. This indicator provides relatively simple information about the possibilities and utilization of machines and equipment as well as the quality achieved in the production processes. If the OEE indicator is determined correctly, based on the available and correct data in a system, processes can be better controlled, managed and improved. However, it is important to properly monitor (decode) the data and to understand them. The paper presents the potential but also the limits (obstacles) of Overall Equipment Effectiveness (OEE) on case studies in selected domestic enterprises in the Moravian-Silesian region.
PL
W artykule omówiono wybrane zagadnienia dotyczące zwiększania produktywności frezowania walcowo-czołowego m.in. poprzez stosowanie powłok wielowarstwowych.
EN
Selected issues related to increasing the productivity of end milling tools, among others through the use of multilayer coatings, are discussed.
EN
Common Agricultural Policy represents the main instrument of the European Union for the development of agriculture and rural areas. European funds are vital for the productivity and competitive-ness of agricultural holdings, as well as for the transfer of agricultural knowledge and innovation. Supporting small and young farms is essential for the vitality of rural areas and for the renewal of generations of farmers. The aim of this work is to transfer agricultural knowledge in order to improve the productivity of agricultural holdings, especially among young farmers and small farms. We implemented training program through European funds related to Measure 1. "Actions for knowledge transfer and information actions" from Rural Development Programme of Romania. The characteristic of 100 participants and their responses were analyzed. Most of the participants were young people up to 40 years old (59%). The vast majority of the participants were from the rural area and only 17% were from the urban area. 53% from participants were strongly agree with the fact that level of knowlegde influence farm productivity. Actions for knowledge transfer improve the adaptation of farmers to the new challenges of agriculture, as well as productivity.
EN
Using multiple classification approach to examine plant traits response to grazing and fencing (as without access to grazing) is rare. Here we used multiple classification approach to examine plant diversity, productivity and species traits response to grazing and fencing over a three-year period on the eastern part of the Qing-Hai Tibetan Plateau. The results showed that most common species response to the fence was poorly noticeable. The fencing meadows compared to those under long-term free grazing are characterized by significantly higher total species richness, but species richness declined with sampling years gradually, regardless of grazing or fencing. The correlation showed that species richness was negatively associated with mean annual temperature significantly, suggesting that abiotic factors (e.g. annual temperature) could also play important roles in driving species richness in this subalpine meadow. Total aboveground biomass was not associated with mean annual temperature and rainfall. The fencing meadow demonstrated higher community aboveground biomass relative to the grazing ones, especially the abundance of legume and graminoids increased, while the proportions of sedge decreased, suggested that grazing disturbance favours the increase of reproductive success of sedge (e.g. Kobresia humilis) in this subalpine meadow. Growth form-based analyses combined with canopy height categories should be recommended to reveal general rules and mechanisms relating to grazing.
12
Content available remote Zwiększanie produktywności obróbki skrawaniem
PL
Przedstawiono wybrane zagadnienia związane ze zwiększaniem produktywności obróbki skrawaniem. Podano przykłady wydłużania trwałości narzędzi poprzez osadzanie na ostrzach nanostrukturalnych powłok PVD. Omówiono podnoszenie produktywności poprzez dobór parametrów skrawania na podstawie badań obrabialności materiałów i możliwości Instytutu Zaawansowanych Technologii Wytwarzania w tym zakresie. Zaprezentowano niektóre aspekty oceny skrawalności materiałów i skrawności ostrzy narzędzi oraz wpływu cieczy obróbkowych na te właściwości.
EN
Selected issues related to increasing the productivity of machining were presented. Examples of increasing the tool life by depositing nanostructured PVD coatings on blades are presented. The increase of productivity through selection of machining parameters based on material machinability tests was discussed. The possibilities of The Institute of Advanced Manufacturing Technology in this regards are presented. Some aspects of materials machinability evaluation and cutting abilities of tool edges, as well as effects of metal cutting fluids on these properties are discussed.produktywność, narzędzia, trwałość narzędzia, powłoki, skrawalność materiałów, skrawność ostrzy narzędzi
EN
The aim of the research was to select soil improver which will enhance the soil fertility and to assess the effect on the growth and yielding of lettuce. Algal biomass from the species Scenedesmus acutus, Chlorella vulgaris and soil supplement – zeolite was used in the laboratory experiment. Four fertilizing combinations were used for each plant three times. Doses of fertilizers were established according to the content of nitrogen. Physicochemical analysis of the soil, tested substrates and plant growth parameters were examined. Algal biomass had the greatest impact on the improvement of soil fertility and plant productivity. Fertilization with Scenedesmus acutus caused the increase of almost all soil parameters, e.g. an increase in total organic carbon by 3694 mg kg-1, Kjeldahl’s nitrogen by 1287 mg kg-1. It was found that algal can be used in organic farming, in which the use of soluble mineral fertilizers is impermissible.
PL
Coworking to elastyczna forma pracy indywidualnej i grupowej, umożliwiająca realizację zadań z wykorzystaniem współdzielonych zasobów materialnych i społecznych. Początkowo była ona wykorzystywana przez przedstawicieli wolnych zawodów oraz specjalistów realizujących projekty na zlecenie jako alternatywa dla pracy wykonywanej w biurze lub w domu. Obecnie coraz więcej przedsiębiorstw zaczyna postrzegać coworking jako trwały element strategii biznesowej, a nie wyłącznie jako uzupełnienie tradycyjnego środowiska pracy. W artykule prześledzono rozwój koncepcji coworkingu oraz przedstawiono korzyści z jego implementacji w środowisku organizacyjnym.
EN
Coworking is a flexible form of individual and group work using shared material and social resources. Initially, it was an alternative to working from home or at the office for freelancers and independent contractors. Nowadays, more and more enterprises are beginning to perceive coworking as a permanent element of their business strategy, and not only as a supplement to the traditional working environment. The article explores the evolution of coworking and presents the benefits of its implementation for business.
PL
Prawidłowa struktura wynagrodzeń, na którą składa się między innymi ruchoma premia, uzależniona od uzyskanych przez pracownika efektów pracy, może stanowić jeden z kluczowych elementów poprawy efektywności produkcji w przedsiębiorstwach górniczych. Dobrze zaprojektowane wynagrodzenie ma pobudzać pracowników do efektywniejszej, wydajniejszej pracy i rozwoju. Cele te są realizowane wtedy, gdy jego struktura czy poziom wpływają na wzrost zachowań pożądanych w zakresie realizacji pracy i przede wszystkim wzrost ten jest powiązany z rezultatami pracy pracowników i efektami działalności całego przedsiębiorstwa. Analizując jednak strukturę przeciętnego wynagrodzenia pracownika fizycznego zatrudnionego pod ziemią w losowo wybranym przedsiębiorstwie górniczym na Śląsku, nie wykazano takiej proefektywnościowej struktury. Mając na uwadze powyższe, w publikacji zaprezentowano wyniki analizy związków między przeciętnym wynagrodzeniem a wydobyciem i wydajnością pracy w górnictwie węgla kamiennego w Polsce, poszukując zależności między wymienionymi elementami procesu produkcji.
EN
The correct structure of remuneration that includes, among others, performance bonuses may be one of the key elements needed to improve productivity in mining companies. Well-structured remuneration aims to stimulate more efficient work and development of employees. This goal can be achieved when the structure or level of remuneration prompts desired behaviors in terms of work performance, which will impact work outcomes and overall business productivity. However, when analyzing the structure of average remuneration of manual workers employed underground in randomly selected mining companies in Silesia, no effective structures were reported. Accordingly, this publication presents the results obtained when studying the correlations between the average remuneration and production and work productivity in hard coal mining in Poland, looking for the relationship between these elements of the production process.
EN
Facing the opinion about the ambiguous impact of decoupled subsidies on productivity, the article aims to check whether there are some CAP programmes contributing to the greening trend, which have a positive impact on productivity in FADN regions. Second research question is whether the CAP schemes create social sustainability? A two-stage panel analysis was carried out in the years 2007-2012: in the first stage clusters of regions with significantly different farming were identified; in the second the impact of particular CAP mechanisms on productivity was determined. It is concluded that, depending on the sustainability of farming, there are some CAP ‘green’ programmes which have a positive influence on productivity.
PL
Wobec opinii o niejednoznacznym wpływie subsydiów na produktywność, artykuł ma na celu sprawdzenie, czy istnieją programy wspólnej polityki rolnej (WPR) przyczyniające się do zazielenienia, które mają pozytywny wpływ na produktywność techniczną w produkcji rolnej w regionach Unii Europejskiej (według FADN). Drugim pytaniem badawczym jest, na ile subsydia WPR kreują ład społeczny ? Przeprowadzono dwustopniową analizę panelową w latach 2007-2012: w pierwszej fazie zidentyfikowano klasy regionów, w których rolnictwo cechuje odmienny sposób gospodarowania; w drugim kroku określono wpływ poszczególnych mechanizmów WPR na produktywność zużycia pośredniego. Stwierdzono, że w zależności od poziomu zrównoważenia rolnictwa istnieją różne zielone programy WPR, które mają pozytywny wpływ na wspomnianą produktywność.
EN
In the competitive business environment, the managerial style that makes up the psychosocial environment in the organization can be the key to increasing employee outcomes. Analyzing the psychological and behavioral profile of engineers provides practical solutions to address a particular managerial style that fits into this socio-professional category. Adapting management to the needs of employees brings a new organizational paradigm, namely the learning organization, as opposed to trying to limit relations to Procust’s Bed. A managerial style tailored to the personal needs of employees can increase their well-being and, implicitly, increase productivity. The research concludes that managerial behavior tailored to the personality of the engineers is based on assertive communication, oriented both to tasks and relationships. It is desirable for the manager to show a practical, organizational and goal-oriented spirit.
PL
W konkurencyjnym środowisku biznesowym, styl menedżerski, który tworzy środowisko psychospołeczne w organizacji, może być kluczem do zwiększenia wyników pracowników. Analiza profilu psychologicznego i behawioralnego inżynierów dostarcza praktycznych rozwiązań dotyczących konkretnego stylu zarządzania, który pasuje do tej kategorii społeczno-zawodowej. Dostosowanie zarządzania do potrzeb pracowników wprowadza nowy paradygmat organizacyjny, a mianowicie organizację uczącą się. Styl menedżerski dostosowany do osobistych potrzeb pracowników może zwiększyć ich dobre samopoczucie i, w domyśle, zwiększyć produktywność. Autorzy badania konkludują, że zachowanie menedżerskie dostosowane do osobowości inżynierów opiera się na asertywnej komunikacji, zorientowanej zarówno na zadania, jak i na relacje. Pożądane jest, aby menedżer pokazał ducha praktycznego, organizacyjnego i zorientowanego na cel.
EN
The present investigation studied the seasonal variation between physico-chemical parameters and phytoplankton diversity, community structure and abundance; quantitative samples were collected on a monthly basis from April 2015 to March 2016 at Parangipettai coast, the Bay of Bengal (BOB). Statistical analyses were performed on physico-chemical parameters such as salinity, dissolved oxygen (DO), pH, temperature, nitrate, nitrite, silicate, and inorganic phosphate (IP). The significant (P < 0.0005) variation among seasons as well as a high influence of these parameters was observed on phytoplankton productivity. Totally, 117 species were identified, belonging to five different classes, Coscinodiscophyceae (62%), Bacillariophyceae (17%), Fragilariophyceae (8%), Dinophyceae (8%) and Cyanophyceae (5%). Throughout the study period, the occurrence of most dominant species was observed from class Coscinodiscophyceae and Bacillariophyceae. The phytoplankton species also showed significant changes according to seasonal variations as well as the nutrient availability. Phytoplankton attained their maximum population density during premonsoon; whereas minimum population was observed during monsoon. The performed statistical analysis on phytoplankton species, the Shannon & Wiener diversity index was found to be higher during postmonsoon and lower during monsoon season. The Canonical Correspondence Analysis (CCA) was used, to find out the seasonal relationship between phytoplankton and physicochemical parameters. Hence, the executed CCA results revealed that temperature, salinity, silicate, DO and IP have a higher influence on phytoplankton abundance.
PL
Przedstawiono efekt prac B+R objętych projektem pt. „Zaprojektowanie struktur powierzchni indywidualnych implantów medycznych wyprodukowanych w technologii hybrydowej z użyciem głowicy laserowej”, zrealizowanych w ramach Programu Operacyjnego Inteligentny Rozwój POIR.01.01.01. Udoskonalono technologię ubytkową obróbki implantów z medycznych stopów tytanu i opracowano technologię laserowej modyfikacji powierzchni implantu.
EN
The effect of R&D works covered by the project entitled „Designing the surface structures of individual medical implants, produced in hybrid technology using a laser head”, implemented as part of the Smart Growth Operational Programme No. POIR.01.01.01. The technology of waste machning of implants from medical titanium alloys has been improved and the technology of laser surface modification of the implant has been developed.
EN
Lean has established itself as the primordial approach to obtain operational excellence. Its simple and intuitive techniques focus on reducing lead time through continuous improvement, involving all levels of employees in the organization. However, the rate of successful implementations has remained low. This paper contributes to the understanding of continuous improvement in a Lean context, by analyzing a database of almost 10.000 improvement actions, from 85 companies, covering the time frame 2010–2018. It discusses categories of actions, their impact and cost, as well as key characteristics of the companies. It proposes an objective criterion to identify “success” and “failure” in Lean implementation and tries to link these to operational results. It is probably the first time an analysis of this magnitude on the subject has been performed.
first rewind previous Strona / 10 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.