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CO-MAT-TECH 2012

Volumen 20 (2012): Heft 32 (June 2012)

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Volumen 19 (2011): Heft 30 (June 2011)

Volumen 18 (2010): Heft 29 (December 2010)

Volumen 18 (2010): Heft 28 (June 2010)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1338-0532
ISSN
1336-1589
Erstveröffentlichung
03 Mar 2011
Erscheinungsweise
2 Hefte pro Jahr
Sprachen
Englisch

Suche

Volumen 20 (2012): Heft 32 (June 2012)

Zeitschriftendaten
Format
Zeitschrift
eISSN
1338-0532
ISSN
1336-1589
Erstveröffentlichung
03 Mar 2011
Erscheinungsweise
2 Hefte pro Jahr
Sprachen
Englisch

Suche

4 Artikel
Uneingeschränkter Zugang

Properties of Water Miscible Cutting Fluids in the Cutting Process

Online veröffentlicht: 30 Jan 2013
Seitenbereich: 1 - 7

Zusammenfassung

Abstract

Article discusses the diagnostics and possibility of monitoring cutting fluids and proposes a solution: on-line monitoring system. In regard to verify the possibility of using various methods to identify changes in the cutting fluids were carried out experiments to measure electrical parameters

Schlüsselwörter

  • cutting fluids
  • machining
  • properties
  • monitoring
Uneingeschränkter Zugang

Comparison of Two Spectrophotometric Techniques for Nutrients Analyses in Water Samples

Online veröffentlicht: 30 Jan 2013
Seitenbereich: 8 - 19

Zusammenfassung

Abstract

The aim of this contribution is to compare two common techniques for determining the concentrations of nitrate, nitrite, ammonium and phosphates in surface water and groundwater. Excess of these nutrients in water can directly affect human health (e.g. methemoglobinaemia) or indirectly through the products of secondary pollution - eutrophication (e.g. cyanotoxins, emanation of hydrogen sulphide, mercaptanes, methane...). Negative impact of nutrients excess in surface water often causes the destruction of water ecosystems, and therefore, common substances of these elements must be monitored and managed. For these experiments two spectrophotometric techniques - ultraviolet spectrophotometry and nutrient photometry were used. These techniques are commonly used for quick and simple analyses of nutrients in waste water. There are calibration curves for each nutrient and for determination of their concentration.

Schlüsselwörter

  • Monitoring of nutrients
  • surface water
  • spectrophotometric methods
Uneingeschränkter Zugang

Influence of the Flow Rate of Oxidising Atmosphere on the Flame Spread Rate on the Surface of Organic Setlled Dust

Online veröffentlicht: 30 Jan 2013
Seitenbereich: 20 - 27

Zusammenfassung

Abstract

The presented paper deals with determining the influence of the flow rate of oxidising atmosphere on the flame spread along the surface of the organic settled dust layer. We determined the rate of the flame spread on the surface of the organic settled dust layer (whole grain rye and spelt flour) with absolute moisture of 10 % wt., for the flow rates of oxidising atmosphere 1, 3, 5 and 10 cm/s. Pure oxygen was used as an oxidising atmosphere. The obtained results suggest that there exists a power relationship of the flame spread rate along the surface of organic settled dust layer to the flow rate of the oxidising mixture. The method described is suitable for the relative comparison of the organic settled dust layer from the point of its ability to spread the flame and the influence of the air flow rate on this process.

Schlüsselwörter

  • Dust
  • Dust layer
  • Flame spread rate
  • Oxidising mixture flow rate
  • Dust fire risk assessment
Uneingeschränkter Zugang

The Marketing Concept in an Academic Environment

Online veröffentlicht: 30 Jan 2013
Seitenbereich: 28 - 34

Zusammenfassung

Abstract

Universities, as subjects of the academic environment, are institutions with the priority of education and research. The task of the marketing concept in the academic field is to communicate with all important target groups to support a stronger position and their perception of the school. The aim of the intervention is to increase the prestige, improve awareness, support positive attitudes, and present successful results in all areas of activity. This means creation and protection of a positive image, which enables higher interest of all target groups and secures better awareness about it.

Schlüsselwörter

  • marketing management
  • academic environment
  • presentation maps
4 Artikel
Uneingeschränkter Zugang

Properties of Water Miscible Cutting Fluids in the Cutting Process

Online veröffentlicht: 30 Jan 2013
Seitenbereich: 1 - 7

Zusammenfassung

Abstract

Article discusses the diagnostics and possibility of monitoring cutting fluids and proposes a solution: on-line monitoring system. In regard to verify the possibility of using various methods to identify changes in the cutting fluids were carried out experiments to measure electrical parameters

Schlüsselwörter

  • cutting fluids
  • machining
  • properties
  • monitoring
Uneingeschränkter Zugang

Comparison of Two Spectrophotometric Techniques for Nutrients Analyses in Water Samples

Online veröffentlicht: 30 Jan 2013
Seitenbereich: 8 - 19

Zusammenfassung

Abstract

The aim of this contribution is to compare two common techniques for determining the concentrations of nitrate, nitrite, ammonium and phosphates in surface water and groundwater. Excess of these nutrients in water can directly affect human health (e.g. methemoglobinaemia) or indirectly through the products of secondary pollution - eutrophication (e.g. cyanotoxins, emanation of hydrogen sulphide, mercaptanes, methane...). Negative impact of nutrients excess in surface water often causes the destruction of water ecosystems, and therefore, common substances of these elements must be monitored and managed. For these experiments two spectrophotometric techniques - ultraviolet spectrophotometry and nutrient photometry were used. These techniques are commonly used for quick and simple analyses of nutrients in waste water. There are calibration curves for each nutrient and for determination of their concentration.

Schlüsselwörter

  • Monitoring of nutrients
  • surface water
  • spectrophotometric methods
Uneingeschränkter Zugang

Influence of the Flow Rate of Oxidising Atmosphere on the Flame Spread Rate on the Surface of Organic Setlled Dust

Online veröffentlicht: 30 Jan 2013
Seitenbereich: 20 - 27

Zusammenfassung

Abstract

The presented paper deals with determining the influence of the flow rate of oxidising atmosphere on the flame spread along the surface of the organic settled dust layer. We determined the rate of the flame spread on the surface of the organic settled dust layer (whole grain rye and spelt flour) with absolute moisture of 10 % wt., for the flow rates of oxidising atmosphere 1, 3, 5 and 10 cm/s. Pure oxygen was used as an oxidising atmosphere. The obtained results suggest that there exists a power relationship of the flame spread rate along the surface of organic settled dust layer to the flow rate of the oxidising mixture. The method described is suitable for the relative comparison of the organic settled dust layer from the point of its ability to spread the flame and the influence of the air flow rate on this process.

Schlüsselwörter

  • Dust
  • Dust layer
  • Flame spread rate
  • Oxidising mixture flow rate
  • Dust fire risk assessment
Uneingeschränkter Zugang

The Marketing Concept in an Academic Environment

Online veröffentlicht: 30 Jan 2013
Seitenbereich: 28 - 34

Zusammenfassung

Abstract

Universities, as subjects of the academic environment, are institutions with the priority of education and research. The task of the marketing concept in the academic field is to communicate with all important target groups to support a stronger position and their perception of the school. The aim of the intervention is to increase the prestige, improve awareness, support positive attitudes, and present successful results in all areas of activity. This means creation and protection of a positive image, which enables higher interest of all target groups and secures better awareness about it.

Schlüsselwörter

  • marketing management
  • academic environment
  • presentation maps

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