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Answer Upon - Tender Touch Of Apparels
The Institute of Pension and Payroll Management (IPPM) has a saying developed and used by its members: "We don’t simply do payroll, because payroll isn’t simple". Recently the Inland Revenue has introduced major changes which affect payroll and include legislation covering extended maternity leave, new paternity leave and payment rules, student loan repayments and many more.Any company offering Stakeholder Pensions to its employees needs to be aware of the rules governing the application of pension through payroll.Payroll becomes a juggle of paying employees, understanding the legislation and how to apply it and then ensuring compliance with the PAYE and National Insurance audit groups.Over the next few years there will continue to be changes in legislation applicable through payroll. The IPPM and other organizations constantly lobby the government departments to ensure that new laws do not make the job of the payroll managers more and more difficult. The IR is in the process of introducing electronic filing which should make a big difference at the end of the tax year, especially to large organizations, but also throughout the year when form will be downloaded and returned electronically. All organizations will be expected to file paperwork and to pay the Inland Revenue electronically. This will be phased in with large organizations initially and smaller ones by 2008.One major change recently has been the increase of National Insurance contributions. Not only has the percentage increased but the upper limit 1% has resulted in most people paying more NI. National Insurance does not only apply to the gross pay provided for employees but also to many employee benefits. A number of companies have been caught out by this change because it complicates the completion of P11Ds, often produced alon
-the thermal resistance to transmission of heat from the surface of the material,
- the thermal resistance of the clothing material, and
- the thermal resistance of the air interlayer.
It is clear that heat transfer through a fabric is a complex phenomenon affected by lot of factors. The three major factors in normal fabrics appear to be thickness, enclosed still air and external air movement. Out of all these, the entrapped air is the most important factor in determining thermal insulation. There are "microlayers" (those between contacting surfaces of the materials) and "macrolayers" (between non-contacting surfaces) of air enclosed within an assembly, and an increase of either of these can increase thermal insulation. However, the characteristics of fibre, yarns, fabrics and garment assemblies also have a major contribution towards thermal comfort in the end.
Air permeability
Air permeability describes the characteristic of fabric to allow air to pass through. The air permeability should be as low as possible in outdoor clothing because it should act as a wind protection. The air permeability of a fabric can be said is a measure of how well it allows the passage of air through it. The passage of air is important for a number of fabrics depending on the end uses such as industrial filters, tents, sailcloths, parachutes, raincoat materials, shirtings, downproof fabrics and airbags. Basically, the air permeability of a fabric can influence its comfort behaviours in number of ways. In the first case, a material that is permeable to air is in general, likely to be permeable to water as well, in either the vapour or the liquid phase. Thus, the moisture-vapour permeability and the liquid-moisture transmission are normally closed related to air permeability. In the second case, the thermal resistance of a fabric depends on the enclosed still air inside, and this factor is in turn influenced by the fabric structure.
Water vapour transmission
The water vapour permeability of fabrics is an important property for those used in clothing systems which are to be worn during vigorous activity. The human body cools itself b
In Part 1 of this article we looked at how your employees could be brought to a level of good understanding of the hazards and how to overcome them. Part 2 looks at other aspects of your role as an employer in meeting the necessary requirements connected with your ‘duty of care'.Are you supervising your employees enough? This is not simply a matter of showing your face every so often, but ensuring that you meet with them regularly to discuss any issues that may be occurring concerning their work. Often, when Cleaning Companies staff out jobs, it is the cleaners themselves who know more about what is going on in the contracts than the managers themselves. Employees should be encouraged to come to you with any problems they may be having with any of the techniques, equipment, language, or the client. It may be that after discussions with your cleaning staff you decide to review these aspects of the contract, or it may be that everything is running smoothly and no action is required. Either way, the opinions of your employees matter, and these meeting times can provide a simple and effective way of dealing with problems before they begin.It is your responsibility as an employer to provide all of your staff with the correct Personal Protective Equipment. Cleaning staff are not responsible for providing their own PPE. It is essential that you make you employees aware of the reasons that they need PPE, the correct use of such items and procedures for replacing and/or repairing items. Communication should be encouraged, and you should always respond promptly to any issues that your employees raise concerning PPE. Items of PPE must be suitable for the task and must be a correct fit for the individual. It is your responsibility to do your research into the properties and correct use of PPE to determine
According to a recent study, thermal equilibrium is the most significant and the only one standard of comfort. It is clear that the state of comfort can only be attained when the most complicated interactions between a range of physiological, psychological, neurophysiological and physical factors have taken place in a satisfactory manner. Through combination of impulses passed through the nerves from a variety of peripheral receptors like visual, auditory, smell, taste and touch in the brain, the comfort is realized. Amongst them, clothing comfort is mainly connected with skin sensory systems.
The clothing comfort can be segregated further into three groups.
1. Psychological comfort
2. Tactile comfort
3. Thermal comfort
Psychological comfort
It is mostly related with the visual appeal which covers size, fit, color, luster, style, fashion compatibility etc.
Tactile comfort
Tactile comfort is related to fabric surface and mechanical properties.
Thermal comfort
Thermal comfort is connected to the ability of fabric to maintain the temperature of skin during transfers of heat and perspiration generated within the human body. There are two aspects of wearing a comfort of clothing:
. Thermo-physiological wear comfort which involves the heat and moisture transfer characteristics of clothing and the manner that clothing facilitates to maintain the balance of heat of the body during various activity and movement.
. Skin sensational wear comfort which is connected with the mechanical contact between the fabric and the skin, its smoothness and flexibility in movement and its lack of prickle, irritation and sticking when damp.
Clothing comfort
Now comfort is considered as a primary aspect when a textile product is valued. The comfort characteristics of fabrics mostly depend on its structure, kind of raw material used, weight, moisture absorption, heat transmission and skin perception. Clothing comfort can be classified under two broad sections:
- Sensorial comfort
- Non-sensorial comfort.
Sensorial comfort
Sensorial comfort is an experience of clothing comfort which is sensory responses of nerves ending to external stimuli including thermal, pressure, pain etc producing neurophysiological impulses which are sent to the brain. These signals are responded suitably by adjusting the blood flow, sweating rate or heat production by shivering. The brain then processed these sensory signals to formulate subjective perception of sensations as follows:
Tactile sensations: scratchy, itchy, picky, static, prickly, tickling, rough, raggy
Moisture sensations: sultry, nonabsorbent, clingy, clammy, damp, wet, sticky
Pressure (body fit) sensations: heavy, soft, stiff, snug, loose, lightweight
Thermal sensations: warm, hot, cold, chill, cool
These sensations are suitable largely in summer wear, sportswear and body-fit garments. Sensorial properties are all about the performance of a fabric on skin contact, and depend on the fibre material used, the construction of fabric (surface structure) and the treatments of fabric finishing. The hand properties are a very complex concept including dimensional changes at small forces (tensile, shear, compression and bending), surface properties (friction and roughness) and surface coolness or warmness. A smooth fabric surface has a large area of contact with the skin and thus it may feel cool to skin because a thermal insulative air layer is absent. Surface friction affects not only hand properties but also safety in use.
Non-sensorial comfort
Non-sensorial comfort basically related with physical processes which generate the stimuli like heat transfer by conduction, convection and radiation, moisture transfer by diffusion, sorption, wicking and evaporation. It also covers mechanical interactions in the form of pressure, friction and dynamic irregular contact. Non-sensorial comfort is not only comprised of thermal and moisture transmission but also includes air permeability, water repellency and water resistance.
The heat and moisture transfer behaviour of clothing has been studied intensively by Fourt and Hollies and Hollies and Goldman. They have used various equations to describe heat and moisture transfer in clothing which are as follows:
Convective heat loss: Hc = kc ^ A^ (Tsk - Tab)
Evaporative heat loss: He = ke ^ A ^ (Psk - Pab)
Where, kc = coefficient for convective heat transfer*, A = surface area of the body, Tsk= mean weighted skin temperature of the surface of the body, Tab = dry bulb temperature, ke = evaporative coefficient, determined by Lewis relationship (ke = 2.2 kc), Psk = saturated vapor pressure of water at skin temperature, Pab = ambient vapor pressure (*covers not only the still air layer close to the body but also the thermal properties of the clothing worn.)
Characteristics signifying to clothing comfort
Fabric hand
A fabric hand or handle describes the way a fabric feels when it is touched by human hand and gives an idea of texture of the fabric. This property is a subjective sensory complex sensation obtained by active manipulation of neural sagaciousness of our hands. Our hands perceive the fabric texture using sensory mechanisms like muscle sense and kinesthesia. The mechano receptors in the glabrous skin of our hands, equipped with large number of nerve endings having about 17,000 units that are sensitive to non-noxious mechanical deformation play a key role in subjective assessment of the fabric handle. Different types of 'touch' in differentiating the 'fabric handle' between wearing a garment and handling a fabric have been described. Heller discussed the differences between active and passive touch and he differentiated 'synthetic touch' with 'analytic touch'.
Katz classified 'active touch' into four categories:
. Gliding touch,
. Sweeping touch,
. Grasping touch and
. Kinematics grasping touch.
Texture, which is another factor of hand, is the uniformity and variation of the surface that describes it's actual or implied features. Texture is a sensory perception that covers various aspects of surface features of the fabrics including visual, auditory and tactile perceptions and can be described in many ways such as smooth, rough, shiny or dull. Among them, roughness is an important aspect which has been studied extensively and reported to have difference in perception between touching with the fingers and feeling by the skin during the wear.
Thermal comfort
Clothing has a vital part to play in maintaining the heat balance as it modifies the heat loss from the skin surface under the same time has the secondary effect of altering the moisture loss from the skin. However, no single clothing system is suitable for all occasions and climates. A clothing system which is suitable for one climate may not be suitable for another climate. Good thermal insulation properties are required for clothing and textiles used specially in cold climates. The thermal insulation properties depend on number of factors like thickness and number of layers, drape, fibre density, flexibility of layers and adequacy of closures. The thermal insulation value of clothing when it is worn is not just dependent on the insulation value of each individual garment but on the entire outfit as the air gaps between the layers of clothing can add considerably to the total thermal insulation value. This assumes that the gaps are not so large that air movement can take pace within them, leading to heat loss by convection. Because of this limitation the closeness of fit of a garment has a great influence on its insulation value as well as the fabric from which it is constructed. The resistance that a fabric offers to the movement of heat through it is of critical importance to its thermal comfort.
In studying the thermal insulation properties of garments during wear, it is noted that thermal resistance to transfer of heat from the body to the surrounding air is the sum of three parameters:
-the thermal resistance to transmission of heat from the surface of the material,
- the thermal resistance of the clothing material, and
- the thermal resistance of the air interlayer.
It is clear that heat transfer through a fabric is a complex phenomenon affected by lot of factors. The three major factors in normal fabrics appear to be thickness, enclosed still air and external air movement. Out of all these, the entrapped air is the most important factor in determining thermal insulation. There are "microlayers" (those between contacting surfaces of the materials) and "macrolayers" (between non-contacting surfaces) of air enclosed within an assembly, and an increase of either of these can increase thermal insulation. However, the characteristics of fibre, yarns, fabrics and garment assemblies also have a major contribution towards thermal comfort in the end.
Air permeability
Air permeability describes the characteristic of fabric to allow air to pass through. The air permeability should be as low as possible in outdoor clothing because it should act as a wind protection. The air permeability of a fabric can be said is a measure of how well it allows the passage of air through it. The passage of air is important for a number of fabrics depending on the end uses such as industrial filters, tents, sailcloths, parachutes, raincoat materials, shirtings, downproof fabrics and airbags. Basically, the air permeability of a fabric can influence its comfort behaviours in number of ways. In the first case, a material that is permeable to air is in general, likely to be permeable to water as well, in either the vapour or the liquid phase. Thus, the moisture-vapour permeability and the liquid-moisture transmission are normally closed related to air permeability. In the second case, the thermal resistance of a fabric depends on the enclosed still air inside, and this factor is in turn influenced by the fabric structure.
Water vapour transmission
The water vapour permeability of fabrics is an important property for those used in clothing systems which are to be worn during vigorous activity. The human body cools itself by
We always seem to be hearing in the news that a government contract has been awarded to a company, which has not fulfilled its responsibilities. As a matter of fact this is so commonplace that one should be asking why does this keep occurring? Well, there are a number of reasons why this is the case.Sometimes politicians persuade bureaucratic agencies to lean towards a certain government contractor and the bureaucrats know that they must comply otherwise they could lose their job and or their agency will not receive the funding it needs for next year's budget. Those companies, which pander to podium pushing politicians through lobbying and fund raising for their campaigns tend to get the best contracts. We all know this is true.Another common reason is that the government is known to be after the lowest price. Therefore many companies underbid the contracts just to get the work and then cannot afford to do the job correctly. Likewise many companies refuse to bid on government contracts because the government is so slow to pay and if you are a smaller company the cash flow could kill your business.It is interesting that the government at all levels promotes small businesses and yet at the same time strings them out on accounts receivable sometimes for as much as 120 days or more. This seems quite un-reputable and unfortunate, but it is the truth. Some might say the government does not deserve the very best companies in the marketplace and that is upsetting considering the taxpayer is footing the bill. Please consider all this in 2006.
Clothing comfort
Now comfort is considered as a primary aspect when a textile product is valued. The comfort characteristics of fabrics mostly depend on its structure, kind of raw material used, weight, moisture absorption, heat transmission and skin perception. Clothing comfort can be classified under two broad sections:
- Sensorial comfort
- Non-sensorial comfort.
Sensorial comfort
Sensorial comfort is an experience of clothing comfort which is sensory responses of nerves ending to external stimuli including thermal, pressure, pain etc producing neurophysiological impulses which are sent to the brain. These signals are responded suitably by adjusting the blood flow, sweating rate or heat production by shivering. The brain then processed these sensory signals to formulate subjective perception of sensations as follows:
Tactile sensations: scratchy, itchy, picky, static, prickly, tickling, rough, raggy
Moisture sensations: sultry, nonabsorbent, clingy, clammy, damp, wet, sticky
Pressure (body fit) sensations: heavy, soft, stiff, snug, loose, lightweight
Thermal sensations: warm, hot, cold, chill, cool
These sensations are suitable largely in summer wear, sportswear and body-fit garments. Sensorial properties are all about the performance of a fabric on skin contact, and depend on the fibre material used, the construction of fabric (surface structure) and the treatments of fabric finishing. The hand properties are a very complex concept including dimensional changes at small forces (tensile, shear, compression and bending), surface properties (friction and roughness) and surface coolness or warmness. A smooth fabric surface has a large area of contact with the skin and thus it may feel cool to skin because a thermal insulative air layer is absent. Surface friction affects not only hand properties but also safety in use.
Non-sensorial comfort
Non-sensorial comfort basically related with physical processes which generate the stimuli like heat transfer by conduction, convection and radiation, moisture transfer by diffusion, sorption, wicking and evaporation. It also covers mechanical interactions in the form of pressure, friction and dynamic irregular contact. Non-sensorial comfort is not only comprised of thermal and moisture transmission but also includes air permeability, water repellency and water resistance.
The heat and moisture transfer behaviour of clothing has been studied intensively by Fourt and Hollies and Hollies and Goldman. They have used various equations to describe heat and moisture transfer in clothing which are as follows:
Convective heat loss: Hc = kc ^ A^ (Tsk - Tab)
Evaporative heat loss: He = ke ^ A ^ (Psk - Pab)
Where, kc = coefficient for convective heat transfer*, A = surface area of the body, Tsk= mean weighted skin temperature of the surface of the body, Tab = dry bulb temperature, ke = evaporative coefficient, determined by Lewis relationship (ke = 2.2 kc), Psk = saturated vapor pressure of water at skin temperature, Pab = ambient vapor pressure (*covers not only the still air layer close to the body but also the thermal properties of the clothing worn.)
Characteristics signifying to clothing comfort
Fabric hand
A fabric hand or handle describes the way a fabric feels when it is touched by human hand and gives an idea of texture of the fabric. This property is a subjective sensory complex sensation obtained by active manipulation of neural sagaciousness of our hands. Our hands perceive the fabric texture using sensory mechanisms like muscle sense and kinesthesia. The mechano receptors in the glabrous skin of our hands, equipped with large number of nerve endings having about 17,000 units that are sensitive to non-noxious mechanical deformation play a key role in subjective assessment of the fabric handle. Different types of 'touch' in differentiating the 'fabric handle' between wearing a garment and handling a fabric have been described. Heller discussed the differences between active and passive touch and he differentiated 'synthetic touch' with 'analytic touch'.
Katz classified 'active touch' into four categories:
. Gliding touch,
. Sweeping touch,
. Grasping touch and
. Kinematics grasping touch.
Texture, which is another factor of hand, is the uniformity and variation of the surface that describes it's actual or implied features. Texture is a sensory perception that covers various aspects of surface features of the fabrics including visual, auditory and tactile perceptions and can be described in many ways such as smooth, rough, shiny or dull. Among them, roughness is an important aspect which has been studied extensively and reported to have difference in perception between touching with the fingers and feeling by the skin during the wear.
Thermal comfort
Clothing has a vital part to play in maintaining the heat balance as it modifies the heat loss from the skin surface under the same time has the secondary effect of altering the moisture loss from the skin. However, no single clothing system is suitable for all occasions and climates. A clothing system which is suitable for one climate may not be suitable for another climate. Good thermal insulation properties are required for clothing and textiles used specially in cold climates. The thermal insulation properties depend on number of factors like thickness and number of layers, drape, fibre density, flexibility of layers and adequacy of closures. The thermal insulation value of clothing when it is worn is not just dependent on the insulation value of each individual garment but on the entire outfit as the air gaps between the layers of clothing can add considerably to the total thermal insulation value. This assumes that the gaps are not so large that air movement can take pace within them, leading to heat loss by convection. Because of this limitation the closeness of fit of a garment has a great influence on its insulation value as well as the fabric from which it is constructed. The resistance that a fabric offers to the movement of heat through it is of critical importance to its thermal comfort.
In studying the thermal insulation properties of garments during wear, it is noted that thermal resistance to transfer of heat from the body to the surrounding air is the sum of three parameters:
-the thermal resistance to transmission of heat from the surface of the material,
- the thermal resistance of the clothing material, and
- the thermal resistance of the air interlayer.
It is clear that heat transfer through a fabric is a complex phenomenon affected by lot of factors. The three major factors in normal fabrics appear to be thickness, enclosed still air and external air movement. Out of all these, the entrapped air is the most important factor in determining thermal insulation. There are "microlayers" (those between contacting surfaces of the materials) and "macrolayers" (between non-contacting surfaces) of air enclosed within an assembly, and an increase of either of these can increase thermal insulation. However, the characteristics of fibre, yarns, fabrics and garment assemblies also have a major contribution towards thermal comfort in the end.
Air permeability
Air permeability describes the characteristic of fabric to allow air to pass through. The air permeability should be as low as possible in outdoor clothing because it should act as a wind protection. The air permeability of a fabric can be said is a measure of how well it allows the passage of air through it. The passage of air is important for a number of fabrics depending on the end uses such as industrial filters, tents, sailcloths, parachutes, raincoat materials, shirtings, downproof fabrics and airbags. Basically, the air permeability of a fabric can influence its comfort behaviours in number of ways. In the first case, a material that is permeable to air is in general, likely to be permeable to water as well, in either the vapour or the liquid phase. Thus, the moisture-vapour permeability and the liquid-moisture transmission are normally closed related to air permeability. In the second case, the thermal resistance of a fabric depends on the enclosed still air inside, and this factor is in turn influenced by the fabric structure.
Water vapour transmission
The water vapour permeability of fabrics is an important property for those used in clothing systems which are to be worn during vigorous activity. The human body cools itself b
The main goal of each Healthcare Institution in a highly controlled & competitive environment, is to reduce operating costs while maintaining a consistently acceptable level of patient treatment. Reduce operating costs at all levels:Cost of healthcare Professionals Cost of lab equipment & consumablesCost of pharmaceuticals / medical material Cost of a treatment per Diagnosis related grouping (DRG)Cost per type of medical intervention (e.g. specific medical operation)On the other hand, an acceptable level of patient treatment involves: Evidence based medicine, accurate diagnosis and efficient treatmentOn time admittance in the Hospital and healthcare treatment Treatment with respect for the Patient- analysis of optionsReduction of risks during treatment (e.g. related to the use of medicine, biomedical equipment, blood transfusions) Capture of medical history of the patient in order to support evidence based medicineMoreover, goals of each Healthcare Institution are: Reduction of medical errors and exposure of the patient to medical hazards (e.g. inappropriate levels of radiation)Support medical research with patient & treatment dataParticipate and support a larger Healthcare system, with the exchange of medical information on a patient, as well as statistics on population morbidity & mortality.In Private Healthcare, the excellent Patient service is critical to Customer retention & loyalty and business growth. In order to achieve these goals, each modern Healthcare system aims to enhance its Organisational capability with the introduction of standard business processes, standard healthcare treatment based on standardized healthcare interventions. Medic
The heat and moisture transfer behaviour of clothing has been studied intensively by Fourt and Hollies and Hollies and Goldman. They have used various equations to describe heat and moisture transfer in clothing which are as follows:
Convective heat loss: Hc = kc ^ A^ (Tsk - Tab)
Evaporative heat loss: He = ke ^ A ^ (Psk - Pab)
Where, kc = coefficient for convective heat transfer*, A = surface area of the body, Tsk= mean weighted skin temperature of the surface of the body, Tab = dry bulb temperature, ke = evaporative coefficient, determined by Lewis relationship (ke = 2.2 kc), Psk = saturated vapor pressure of water at skin temperature, Pab = ambient vapor pressure (*covers not only the still air layer close to the body but also the thermal properties of the clothing worn.)
Characteristics signifying to clothing comfort
Fabric hand
A fabric hand or handle describes the way a fabric feels when it is touched by human hand and gives an idea of texture of the fabric. This property is a subjective sensory complex sensation obtained by active manipulation of neural sagaciousness of our hands. Our hands perceive the fabric texture using sensory mechanisms like muscle sense and kinesthesia. The mechano receptors in the glabrous skin of our hands, equipped with large number of nerve endings having about 17,000 units that are sensitive to non-noxious mechanical deformation play a key role in subjective assessment of the fabric handle. Different types of 'touch' in differentiating the 'fabric handle' between wearing a garment and handling a fabric have been described. Heller discussed the differences between active and passive touch and he differentiated 'synthetic touch' with 'analytic touch'.
Katz classified 'active touch' into four categories:
. Gliding touch,
. Sweeping touch,
. Grasping touch and
. Kinematics grasping touch.
Texture, which is another factor of hand, is the uniformity and variation of the surface that describes it's actual or implied features. Texture is a sensory perception that covers various aspects of surface features of the fabrics including visual, auditory and tactile perceptions and can be described in many ways such as smooth, rough, shiny or dull. Among them, roughness is an important aspect which has been studied extensively and reported to have difference in perception between touching with the fingers and feeling by the skin during the wear.
Thermal comfort
Clothing has a vital part to play in maintaining the heat balance as it modifies the heat loss from the skin surface under the same time has the secondary effect of altering the moisture loss from the skin. However, no single clothing system is suitable for all occasions and climates. A clothing system which is suitable for one climate may not be suitable for another climate. Good thermal insulation properties are required for clothing and textiles used specially in cold climates. The thermal insulation properties depend on number of factors like thickness and number of layers, drape, fibre density, flexibility of layers and adequacy of closures. The thermal insulation value of clothing when it is worn is not just dependent on the insulation value of each individual garment but on the entire outfit as the air gaps between the layers of clothing can add considerably to the total thermal insulation value. This assumes that the gaps are not so large that air movement can take pace within them, leading to heat loss by convection. Because of this limitation the closeness of fit of a garment has a great influence on its insulation value as well as the fabric from which it is constructed. The resistance that a fabric offers to the movement of heat through it is of critical importance to its thermal comfort.
In studying the thermal insulation properties of garments during wear, it is noted that thermal resistance to transfer of heat from the body to the surrounding air is the sum of three parameters:
-the thermal resistance to transmission of heat from the surface of the material,
- the thermal resistance of the clothing material, and
- the thermal resistance of the air interlayer.
It is clear that heat transfer through a fabric is a complex phenomenon affected by lot of factors. The three major factors in normal fabrics appear to be thickness, enclosed still air and external air movement. Out of all these, the entrapped air is the most important factor in determining thermal insulation. There are "microlayers" (those between contacting surfaces of the materials) and "macrolayers" (between non-contacting surfaces) of air enclosed within an assembly, and an increase of either of these can increase thermal insulation. However, the characteristics of fibre, yarns, fabrics and garment assemblies also have a major contribution towards thermal comfort in the end.
Air permeability
Air permeability describes the characteristic of fabric to allow air to pass through. The air permeability should be as low as possible in outdoor clothing because it should act as a wind protection. The air permeability of a fabric can be said is a measure of how well it allows the passage of air through it. The passage of air is important for a number of fabrics depending on the end uses such as industrial filters, tents, sailcloths, parachutes, raincoat materials, shirtings, downproof fabrics and airbags. Basically, the air permeability of a fabric can influence its comfort behaviours in number of ways. In the first case, a material that is permeable to air is in general, likely to be permeable to water as well, in either the vapour or the liquid phase. Thus, the moisture-vapour permeability and the liquid-moisture transmission are normally closed related to air permeability. In the second case, the thermal resistance of a fabric depends on the enclosed still air inside, and this factor is in turn influenced by the fabric structure.
Water vapour transmission
The water vapour permeability of fabrics is an important property for those used in clothing systems which are to be worn during vigorous activity. The human body cools itself b
Winning the initial bid is the pathway to survival for construction contractors, and multiple companies are fighting to be affordable while still making a profit. Providing a construction estimate is more than handing over a few figures, and it is an opportunity to show how you can provide value for money with your company's individual strengths. Contracting is truly an art form to be admired, but it can be very stressful too.The first step to creating a construction estimate involves making a realistic assessment of every detail the job entails. When you receive an estimate request from a potential client they won't usually have any knowledge of how the building industry works and are only focused on the end results and bottom line. Many professionals working in the industry are experts for their field, such as architects and engineers, but it is only the construction managers who see the whole picture from the ground up. When you are handed blue prints with a proposal request, always ask for further information where required and make sure you can clearly see what they are after and their reasons for it.When devising schedules for construction projects the only effective way is working front finish to start. This way you are working back from the deadline to ensure everything is done and delivered within generous timeframes. Scrutinize all materials required and consider possible substitutions where discretion is allowed. Any communication with engineers and sub-contractors should always be in writing.When you have worked out how much it will cost to build the construction you will need to include down time incase problems arise. A construction project running perfectly to plan is completely unheard of, so also include extra on the budget for price increases and unforeseen sub-contracto
. Sweeping touch,
. Grasping touch and
. Kinematics grasping touch.
Texture, which is another factor of hand, is the uniformity and variation of the surface that describes it's actual or implied features. Texture is a sensory perception that covers various aspects of surface features of the fabrics including visual, auditory and tactile perceptions and can be described in many ways such as smooth, rough, shiny or dull. Among them, roughness is an important aspect which has been studied extensively and reported to have difference in perception between touching with the fingers and feeling by the skin during the wear.
Thermal comfort
Clothing has a vital part to play in maintaining the heat balance as it modifies the heat loss from the skin surface under the same time has the secondary effect of altering the moisture loss from the skin. However, no single clothing system is suitable for all occasions and climates. A clothing system which is suitable for one climate may not be suitable for another climate. Good thermal insulation properties are required for clothing and textiles used specially in cold climates. The thermal insulation properties depend on number of factors like thickness and number of layers, drape, fibre density, flexibility of layers and adequacy of closures. The thermal insulation value of clothing when it is worn is not just dependent on the insulation value of each individual garment but on the entire outfit as the air gaps between the layers of clothing can add considerably to the total thermal insulation value. This assumes that the gaps are not so large that air movement can take pace within them, leading to heat loss by convection. Because of this limitation the closeness of fit of a garment has a great influence on its insulation value as well as the fabric from which it is constructed. The resistance that a fabric offers to the movement of heat through it is of critical importance to its thermal comfort.
In studying the thermal insulation properties of garments during wear, it is noted that thermal resistance to transfer of heat from the body to the surrounding air is the sum of three parameters:
-the thermal resistance to transmission of heat from the surface of the material,
- the thermal resistance of the clothing material, and
- the thermal resistance of the air interlayer.
It is clear that heat transfer through a fabric is a complex phenomenon affected by lot of factors. The three major factors in normal fabrics appear to be thickness, enclosed still air and external air movement. Out of all these, the entrapped air is the most important factor in determining thermal insulation. There are "microlayers" (those between contacting surfaces of the materials) and "macrolayers" (between non-contacting surfaces) of air enclosed within an assembly, and an increase of either of these can increase thermal insulation. However, the characteristics of fibre, yarns, fabrics and garment assemblies also have a major contribution towards thermal comfort in the end.
Air permeability
Air permeability describes the characteristic of fabric to allow air to pass through. The air permeability should be as low as possible in outdoor clothing because it should act as a wind protection. The air permeability of a fabric can be said is a measure of how well it allows the passage of air through it. The passage of air is important for a number of fabrics depending on the end uses such as industrial filters, tents, sailcloths, parachutes, raincoat materials, shirtings, downproof fabrics and airbags. Basically, the air permeability of a fabric can influence its comfort behaviours in number of ways. In the first case, a material that is permeable to air is in general, likely to be permeable to water as well, in either the vapour or the liquid phase. Thus, the moisture-vapour permeability and the liquid-moisture transmission are normally closed related to air permeability. In the second case, the thermal resistance of a fabric depends on the enclosed still air inside, and this factor is in turn influenced by the fabric structure.
Water vapour transmission
The water vapour permeability of fabrics is an important property for those used in clothing systems which are to be worn during vigorous activity. The human body cools itself b
From the view of the casual observer, restaurant and hospitality management careers are pretty much organized in advanced and handed to you on a pre-fabricated career map – it seems like wherever you end up, you know you will spend a good part of your life working in a hospitality environment. But professionals understand the weaknesses in that statement. They know about the many variables of the restaurant and hospitality industry. They know the restaurant/hospitality industry can be a truly unique and fun workplace, and diverse in the scope of responsibilities that one can attain. As well as being a source for a very respectful income. They know how many vocational choices there are in their business. They know that some of the highest paid people in the US work in their industry. And they know that restaurant and hospitality workplace environments vary dramatically from concept to concept, as do management methods, styles, and titles. A traditional Steakhouse restaurant is very different, as compared to a “Dairy Queen” type quick-serve-ice cream stand, in the way they operate and number of managers required to deal with their respective sales volumes - though both establishments are considered to be restaurants. Same for comparing a Biltmore hotel to a Motel 6 - yet both are lodging environments.Let's continue reviewing career management choices in this industry - how about the experience at a large university or corporate cafeteria or catering department, or maybe as food buyer for a regional restaurant chain, or as Front-of-House or Back-of-House manager at a local fine-dining bistro, or as manager of several food concession trucks that support large construction sites and factories, or even managing a simple shopping mall style kiosk food stand; not to mention other non-food restaurant jobs, like regional
-the thermal resistance to transmission of heat from the surface of the material,
- the thermal resistance of the clothing material, and
- the thermal resistance of the air interlayer.
It is clear that heat transfer through a fabric is a complex phenomenon affected by lot of factors. The three major factors in normal fabrics appear to be thickness, enclosed still air and external air movement. Out of all these, the entrapped air is the most important factor in determining thermal insulation. There are "microlayers" (those between contacting surfaces of the materials) and "macrolayers" (between non-contacting surfaces) of air enclosed within an assembly, and an increase of either of these can increase thermal insulation. However, the characteristics of fibre, yarns, fabrics and garment assemblies also have a major contribution towards thermal comfort in the end.
Air permeability
Air permeability describes the characteristic of fabric to allow air to pass through. The air permeability should be as low as possible in outdoor clothing because it should act as a wind protection. The air permeability of a fabric can be said is a measure of how well it allows the passage of air through it. The passage of air is important for a number of fabrics depending on the end uses such as industrial filters, tents, sailcloths, parachutes, raincoat materials, shirtings, downproof fabrics and airbags. Basically, the air permeability of a fabric can influence its comfort behaviours in number of ways. In the first case, a material that is permeable to air is in general, likely to be permeable to water as well, in either the vapour or the liquid phase. Thus, the moisture-vapour permeability and the liquid-moisture transmission are normally closed related to air permeability. In the second case, the thermal resistance of a fabric depends on the enclosed still air inside, and this factor is in turn influenced by the fabric structure.
Water vapour transmission
The water vapour permeability of fabrics is an important property for those used in clothing systems which are to be worn during vigorous activity. The human body cools itself by sweat production and evaporation during periods of vigorous activity. For instance, the clothing should remove this moisture in order to maintain comfort and reduce the degradation of thermal insulation caused by moisture build-up in cold environment. Water vapour transmission is essential in determining the breathability of clothing and textiles in outdoor wear as well as in indoor wear. A breathable textile allows extra heat loss by evaporation of moisture through the clothing layers. If clothing layers are impermeable, then the moisture is captured between skin and clothing and heat is accumulated in the body. As a consequence, heat and moisture starts building up, causing discomfort, wet skin and skin abrasion.
Water repellency and water absorption
The surface tension properties of fibre or fabric are changed by water repellency treatment as that they repel water drops. Treated fabrics are not completely impermeable to water. The treatment also improves soil repellency to some extent. Water resistance is required in outdoor clothing for protection against rain and is requirement for furniture and bed covering to protect against liquid excretions. Textile and clothing can be water repellency treated with finishing agents or they can be made totally water resistant with coating or laminated membranes.
For diapers, liquid water transmission is an important feature. It is the ability to absorb and capture liquid inside the fibers and not letting it escape. If sweat condenses to liquid it must be able to be transmitted away from the skin surface for the comfort. In considering the movement of liquid, water through a fabric, two comfort aspects may be identified. Water from an external source, e.g. rain, should be prevented from reaching the body, which is achieved by using a water-resistant barrier. On the other hand, water generated at the body surface as perspiration should be removed as quickly and as efficiently as possible for the desired comfort, a process that is encouraged by absorption within a body-covering. Both mechanisms are needed simultaneously for the desired comfort though both the requirements are diametrically opposite. Some textile end uses such as towels, cleaning cloths, diapers and incontinence pads require the material to absorb water. There are two facets to the absorption of water: one is the total amount that can be absorbed regardless of time and the other is the speed of uptake of the water. These two properties are not necessarily related as fabrics of similar structures but with different rates of uptake may ultimately hold similar amounts of water if enough time is allowed for them to reach equilibrium.
Conclusion
So far it can be said that comfort of apparels has not been objectively expressed, although it can be recognised through experiences of a person. Comfort is purely a subjective criterion. However, it can be quantified in an objective manner in terms of the properties of non-sensorial comfort characteristics. Satisfactory thermal equilibrium and efficient moisture management are the two most important comfort criteria in the apparel of twenty first century. Both the sensorial and non-sensorial fabric comfort depends on various factors including the type of the material, method of construction of textile substrate, feeling of the wearer, impacts due to climatic condition of the environment and its variation. Comfort can also be imparted depending on the end use of the apparel by appropriate finishing treatments to the fabric. As the evaluation of comfort depends on the handling of fabrics which is a frictional phenomenon, lot of research and studies are currently carrying out on the surface properties of fibers, yarns and fabrics.
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