Women in Euripides Alcestis, Medea, Andromache, and Bacchae Essays

Euripides portrayal of women in his plays has been somewhat bizarre. His female characters kill out of revenge, kill out of jealousy and kill because a god possessed them too. In Alcestis and Andromache Euripides does produce classic heroic female characters. The women in Medea and The Bacchae are not your typical heroines but serve to show the same theme of female liberation as the women in Alcestis and Andromache. While Alcestis is straight forward with its message, the other three plays mask their true intentions from the people they are created to oppose. Euripides might have been misinterpreted by his society because it was dominated by the very people he wrote his plays against. Euripides disguises some of his radical ideas to those who might oppose him and in Alcestis, Andromache, Medea, and The Bacchae shows his female characters being liberated from oppression. In Alcestis we have the heroic female character Alcestis. She dies as a sacrifice to Death so that her husband, Admetus, can escape his own fate when his time comes. A sign that women are oppressed is that Admetus picked his wife to die for him without giving it much thought. It was only after he realized how loving and caring this woman can be, did he regret his decision. Not only did he regret the decision made with the god Apollo, but Apollo himself goes and has a talk with Death. This switch in the opinion of Admetus in a way expresses the fact that women are not viewed as they should be. Women should not be treated as if they have no useful value, as was the case when Admetus first allowed his wife to be his sacrifice, a decision that he would not have made if he had known the woman for more time. Women therefore should be valued more than they are now,... ... have committed were done against men as of the results of mans oppression against women. Euripides could have been telling the truth about his time, the tales of murderous women who seek revenge on their husbands, and the men of the his time might have tolerated this view. The point that might have escaped the men of Euripides' time was that he was pointing the finger at them. This accusation of men was hidden in his plays. Euripides masked such accusations as rants by crazed females. In a culture where disrespecting woman was in the norm, Euripides highlighted what could go wrong with such disrespect. The only reason that the people of Euripides' time might have not understood his point was that they saw no wrong being done in disrespecting women. How can people be afraid of the results of a mistake if they do not realize they made the mistake in the first place?

Wired Communication Media

Abstract Tons of data is transmitted on day to day basis from one point to another. Data comes in all various forms, physical and virtual. All different application comes with different requirements for data transfer. There is lots of data sitting at one place that needs to transmitted for various different purposes So, there is a definite need of transmitting data. Author in this paper is attempting to address all the possible available wires and cables in the wired communication media for transmission.Author will also be analyzing their history, invention, types, categories, applications, advantages and disadvantages of the transmitting channel available. Keywords: Data, Signals, Wires, Cables, ? Introduction Communication has been around since the beginning of the mankind in one form of another. Its existence is been recognized even before formal language came was formed. People have been communicating through various different vocal indications, signals and gestures. Almost all o rganization in the world relies on data and signals in some form of the other to run their regular operations and accomplish their goals.Data comes in all forms physical and virtual. Businesses need data, its transmission and storage for smooth functioning. The main concern is transmission of virtual data from one machine to another. This can be for various discrete reasons such as read-only, modifications and updating. Thus, a reliable means of communication is needed for transfer of data (William & Sawyer, 2007). There are plenty different kinds of communication media (channels) currently used to satisfy the growing needs of people. Communication media is largely divided into two groups wired media (conducting media) and wireless media.Wired media provides a path for the signal through wires (optical fiber is also included). It was the wired communication media which pioneered in transforming the way the people talked to one another over greater distances or through previously imp enetrable barriers. In wireless media, the communication medium is either air or the atmosphere or space through which the signal travels. Although the current trends are increasingly moving towards use of wireless communication systems but wired systems are still as elevant as they possibly have been because wires still an important element in achieving high speeds for both data and signal can either analog or digital. (Ray & Acharya, 2004). Need for Data Transfer In today’s data driven world, there is no cap on form or type of information that needs to be shared between employees, business partners and clients. Organizations just cannot trust anyone to handle their most sensitive data. Thus, a secured passage for data transmission from one device to another is certainly critical.Data usually is collection of lots of forms of information which needs to be stored and maintained for several as per needed purposes. It is normally stored on disks and tapes but when it needs to t ransmitted it needs to be converted into signals for transfer. In order for the travelling signals to transmit, there are different types of media available to facilitate communication. A type of them, wired media are briefly explained in the following section of this paper (Kittler , 1996). Wired Communication Media – Wires and CablesWired communication media typically refers to data transmission over a wire based communication technology. Wired communication generally refers to physical cabling within a network where the signals are transmitted onto the physical medium i. e. wires. These wires are no longer made up of metal, but glass. These are also called as conducting transmission technologies such as telephone network, internet access, cable television and fiber optic communication. Electromagnetism which is wave guide used for high power applications is also considered as wired line.Alternatively, transmissions of data which don’t rely on wires (cables) are cons idered as wireless communication technologies (William & Sawyer, 2007). There are several different conducting transmission technologies presently available for data transmission. Network requirement for each application can be different, so choosing the right type of transmitting media is very crucial. The different conducting media are discussed as below: Twisted pair wire It was invented by Alexander Graham Bell in 1988. A twisted pair wire is made up of a pair of conducting copper wires twisted with each other over nsulation. The number of twisted pair wires within the outer insulation varies. The reason it’s called twisted wire because the two wires are insulated to prevent wire crossing are primarily twisted together. The twist and the outer insulation help to reduce lines from not only crossing and interfering with each other but also regulate the self and mutual induction. When two wires are running parallel to each other carrying a signal, the possibility of inductio n between them increases. When you hear else’s conversation while being on phone with your friend is a perfect example of it.This is called as crosstalk due to inductions. Such crosstalk is very low in lines passing perpendicular to each other. Thus, lines are twisted to avoid running parallel to each other as perpendicular is quite impossible. There are 7 different types of twisted pair wires available which are further divided into 7 categorized which are described as follows: †¢CAT – 1: Basically used to transmit analog voices. Provides speeds up to 1 Mbps. There used over the years has decreased drastically. †¢CAT – 2: It is almost identical to CAT- 1, but has slightly better performance in terms of attenuation.This kind can transmit data up to 4 Mbps. †¢CAT – 3: It provides speed up to 10 Mbps but the signal attenuates after distance of 100 meters. To mitigate this problem, a repeater can be used to transmit data over 100 meters with l ow attenuation. †¢CAT- 4: It provides speed up to 20 Mbps but they can transmit data only within 100 meters without much attenuation. †¢CAT- 5: With greater number of twisted pairs, they can transmit data at 100 Mbps providing much better quality of wires as compared to previous versions. †¢CAT- 5e: They can transmit data at 125 Mbps but can support up to 1000 Mbps on certain cases. CAT- 6: Their cost is almost same as prior categories but can provide speeds up to 200 Mbps. †¢CAT- 7: These category wires are heavily shielded but are rarely used because of their exceptional high costs. They can support higher speeds of 600 Mbps. Twisted pair wires can also further be classified into shielded twisted pair and the unshielded twisted pair. Shielded twisted pair carries an extra shield of insulation on top to avoid any external induction. All of the categories except CAT- 7 are available in both types.The reason CAT- 7 only comes in shielded form only due to its excep tionally high number of twists. It is been estimated that only a whole twisted pair wires can better serve a local area network of 100 meter range, being cost effective. Applications can be: †¢Computer networking †¢Ethernet cabling †¢Video applications such as security cameras †¢Telephone lines ? Coaxial Cable Coaxial cable was initially founded in 1929 but first used by AT&T in 1940. It consists of single copper wire which is surrounded by at least three layer containing an insulating material, braided wired and plastic coating.It conducts electrical signals via an inner conductor also called as main conductor usually made up of copper or stranded copper wire. This main conductor is a straight wire surrounded by dielectric which actually separates inner main conductor and outer metallic shield. The outer metallic shield is typically made up of from 1 to 4 layers of metallic braid and metallic plate reducing the attenuation by obstructing the outer inducing field s from reaching the inner main conductor. This functionality of coaxial wires allows transmitting analog signals over a broad range of frequencies.The final third layer protecting main conductor is jacket made usually up of thick plastic material. (Nahin, 2002) Please refer to figure 2 in appendix showing a coaxial cable construction with main conductor, dielectric, shield and jacket for better understanding. Coaxial cables are classified into two major categories depending upon the type of data they can transmit. These are: †¢Baseband coaxial cable: Thin baseband coaxial cables are usually used in local area network connecting computers and mainframe computers. They carry one way digital data at speeds up to 10 Mbps. †¢Broadband coaxial cable:Thick broadband coaxial cables are used to transmit analog signals mainly television signals are used to transmit analog signals. A certain disadvantage is even a small continuous current along the imperfect placed shield on any coax ial cable will cause visible or audible interferences. But, there is a major disadvantage using the above discussed two types of coaxial cables that is data theft. Data travelling through these types of wires can easily be trapped. However, fiber optic cables can be used to eliminate this problem. Fiber Optic Cable Fiber optic has made tremendous technological advances to transmit information in the last decade.Telecommunication has been completely revolutionized by this innovated material. The telecommunications currently use electricity, radio or light to send data, images and sound. Fiber optic cable is made up of nothing but a thin glass tube which covered with a plastic shield. It transmits data in form of light pulses instead of sound waves without any interruptions. Since the information is transported in form of light and not electricity, this completely disregards the possibility of degradation of signal and interference due to electrical noise.The photo diode on one cable end produces photons which travel at high speeds up to 100 Gps through the glass tube before it is collected by the photo receptor on the other receiving end of the cable. The fiber optic cable is made up of one or many thin fibers of glass or plastic of 50 to 125 micrometers in diameter which is approximately equivalent to thickness of a hair. It has a cylindrical region called nucleus which allows light propagation and the external zone of coaxial nucleus is called as coating, a plastic like cover. Please refer to figure 3 in the appendix for better understanding.The main advantage of using fiber optic cable is it does not facilitate data tapping and is capable of producing high speeds, over long distances with very low attenuation as compared to other wired cables. For example, it is capable of transmitting an encyclopedia set equivalent to 40 million words in one second. However, there is some attenuation caused due to reflections and refractions of the photons over the glass tu be. Fiber optic cables tend to be expensive but with the availability of cheap LED’s and photo diodes, make it much economical. There are basically two types of fiber optic cables: Single mode fiber – It facilitates data transmission with great speed over long distances. †¢Multi-mode fiber – They are further classified into two types: oMultimode step-index fiber: It is used to transmit data over short distances and in the conventional transference of images. oMultimode grated-index fiber: It is optimal medium to transmit data over intermediate distances. It has a refractive index of nucleus which gradually moves towards outside from center. Photonic Crystal Fiber Photonic crystal fibers were founded by the research group of Philip St. J.Russell in the 1990s. They are generally constructed with the same methods as optical fibers. It is a honeycomb structured wires where the glass tube containing holes carry light signals 10 times longer as compared to fiber optic cable (Dr. Paschotta, 2012). Please refer to figure 4a and 4b in appendix for better understanding. Photonic crystal fibers are mainly divided into two major categories: †¢Index Guiding fibers which has a solid core. †¢Photonic Bandgap or air guiding fibers which have periodic micro-structured elements and a core of low index material (e. g. ollow core). Applications for photonic crystal fibers include: †¢Fiber lasers and amplifiers which include high power devices. †¢Fiber optic sensors of several different kinds. †¢Telecom components such as dispersion control, filtering and switching. †¢Quantum optics. †¢Also for various other purposes such as spectroscopy, metrology, biomedicine, imaging, industrial machining, and military. Conclusion So far in this paper, author showed us the working, application and pros and cons of various wired transmission media. Nobody can decide the right medium on behalf of anybody.It really comes down to speed co st, availability, current system requirement, its integration and future upgrade for growing needs for any particular user. All this requirements are analyzed before any wiring installation is done. Hence, selection of wires according to their functionality plays a very important role in constructing a reliable network. Remember: Communication technology is always developing and you will always find new stuff for various purposes, so plan and select accordingly. ? References Dr. Paschotta, R. (2012, Sep 20). Photonic crystal fibers. Retrieved from ttp://www. rp-photonics. com/photonic_crystal_fibers. html Kittler , F. (1996). Journal of the history of communication media. Arthur and Marilouse Kroker Editors, Retrieved from http://hydra. humanities. uci. edu/kittler/comms. html Nahin, P. J. (2002). Oliver heaviside: The life, work, and times of an electrical genius of the victorian age. New York, NY: The John Hopkins University Press. Retrieved from http://books. google. com/books? i d=e9wEntQmA0IC&printsec=frontcover&source=gbs_ge_summary_r&cad=0 Ray, A. K. , & Acharya, T. (2004). Information technology: Principle and applications. 2nd ed. ). New Delhi, India: Prentice Hall of India Private Limited. Retrieved from http://books. google. com/books? id=iim25OLcUdYC&printsec=frontcover William, B. , & Sawyer, S. (2007). Using information technology. New York, NY: The McGraw-Hill Publishing Inc. Retrieved from http://books. google. com/books? id=WsAgAQAAIAAJ&q=William. B & Sawyer. S, 2007. Using Information Technology. The McGraw-Hill Publishing Inc: New York). &dq=William. B & Sawyer. S, 2007. Using Information Technology. The McGraw-Hill Publishing Inc: New York). &hl=en&sa=X&ei=v1kYUfO7G9Ot0AHJzYDgDw&ved=0CFYQ6AEwBQ

Viscosity

Viscosity of Liquids Part I: Low Viscosities Mona Kanj Harakeh 1 Objectives †¢ To measure and analyze the viscosities of ideal (Toluene/p-Xylene) and nonideal (Methanol/Water) binary solutions and their components. †¢ To determine the Activation Energy to viscous flow. †¢ The effect of temperature change on the viscosity will be studied. Method: The viscosities of liquids are determined by measuring the flow time for various liquids in an Ostwald viscometer. 2 Ostwald viscometer 3 Viscosity †¢ The resistance of a liquid to flow is called its viscosity Viscosity is a property of liquids that is important in applications ranging from oil flow in engines to blood flow through arteries and veins. Measuring viscosity †¢ How long a liquid takes to flow out of a pipette under the force of gravity. †¢ How fast an object (steel ball) sinks through the liquid under gravitational force. 4 Molecular properties contributing to viscosity Viscosity arises from the dire cted motion of molecules past each other, it is a measure of the ease with which molecules move past one another. It is affected by many factors such as: †¢ Molecular size. Molecular shape. †¢ Intermolecular interactions (attractive force between the molecules). †¢ Structure of the liquid itself. †¢ Temperature(Viscosity decreases with increasing temperature the increasing kinetic energy overcomes the attractive forces and molecules can more easily move past each other). 5 Viscosity ? The IUPAC symbol of viscosity is the greek symbol eta â€Å"? †. ? Viscosity â€Å"? † of a fluid is its resistance to flow. ? When a Liquid flows, whether through a tube or as the result of pouring from a container. Layers of liquid slide over each other. The force (f) required is directly proportional to the Area (A) and velocity (v) of the layers and inversely proportional to the distance (d) between them. Av Equ. 1 f fd gcms cm ? ? gcm ? 1 s ? 1 ? 1 piose ? 1P Av cm 2 cms ? 2 ?2 d unit of viscosity 6 Viscosity Units The unit of viscosity is the poise named after Poiseuille Jean Louis Marie. It is most commonly expressed in terms of centipoise â€Å"cP†. The centipoise is commonly used because water has a viscosity of 1. 0020 cP at 20oC; the closeness to one is a convenient coincidence. The SI unit of viscosity is Pascal-second (Pa ·s) = N ·s m–2 or Kg m-1 s-1. †¢ In cgs unit 1 Poise â€Å"P† = 1 g. cm-1. s-1 (dyne . s) 10-2 Poise â€Å"P†= 1 centipoise â€Å"cP† 1 Pa. s = 103 cP 10 P = 1 Kg ·m? 1 ·s? 1 = 1 Pa. s 1 cP = 0. 001 Pa. s = 1 mPa. s †¢ The conversion between the units: 1 P = 0. 1 Pa. s For many liquids at room temperature the viscosity is very small 7 (0. 002-0. 04) therefore (10-2 P), centiP is often used. Ostwald Method †¢ Time for fixed volume V of liquid to fall through a capillary into a reservoir Upper Fiducial mark – Depends on density. – Depends on visc osity. Reference liquid is used. †¢ This type can be used for liquids of viscosity up to 100 poise. Lower Fiducial mark 8 Ostwald Method The rate of flow R (cm3/sec) of a liquid through a cylindrical tube of radius r and length l under a pressure head P is given by the Pousille equation. Equ. 2 Measurement of P, r, t, V, and l permits the calculation of the viscosity: Equ. 3 It is easier to measure the viscosity of a liquid by comparing it with another liquid of known viscosity. Since P = ? gh Equ. 4 The viscosity of a solution can be determined relative to a reference liquid (de-ionized H2O). 9Oswald viscometer The Oswald viscometer is a simple device for comparing the flow times of two liquids of known density. If the viscosity of one liquid is known, the other can be calculated. Ostwald viscometer is used to measure the low viscosities’ liquid. After the reservoir is filled with a liquid, it is pulled by suction above the upper mark. The time required for the liquid t o fall from mark 1 to mark 2 is recorded. Then the time required for the same volume of a liquid of known viscosity to flow under identical conditions is recorded, and the viscosity is calculated with Equation ? ? ? k? Equ. 5 ? ? ( r ) ? t ? r tr Where â€Å"r† refers to the viscosity, density and flow time for a reference liquid, usually water. Therefore it is important to do set of measurements of known liquid and at controlled temperature. 10 Fluidity Equ. 6 †¢ The reciprocal of viscosity is fluidity, F ? ? †¢ The concept of fluidity can be used to determine the viscosity of an ideal solution. †¢ One particular advantage for fluidity is that the fluidities of mixed binary solutions of liquids a and b are approximately additive. So if each pure liquid has fluidities Fa and Fb, the fluidity of a mixture is given by: where ? a and ? b is the mole fraction of component a and b respectively, †¢ Fluidity equation is only slightly simpler than the equivalent e quation in terms of viscosity  µ = ? : Equ. 8 †¢ where ? a and ? b is the mole fraction of component a and b respectively, and ? a and ? b are the components of pure viscosities. †¢ The viscosity of the mixture is not linear 11 Kendall proposed another approach for expressing the viscosity of a mixture: ln? ? ? A ln? A ? ? B ln? B Equ. 9 Where xA and xB are the mole fractions of component A and B respectively, and ? A and ?B are the components as pure viscosities. The above equation is valid for the Ideal Solutions such as Toluene/p-Xylene in which the interaction energies between the components are the same as those between the pure components. The failure of component fluidities to be additive in the mixed state arises, then, either from the formation of association complexes between the components or from the destruction of such complexes that may be present in the pure components after the pure components are mixed. Under this circumstance the following equations wou ld not be valid: and ln? ? ? A ln?A ? ? B ln? B 12 Temperature Dependence of Viscosity †¢ Over a reasonably wide temperature range, the viscosity of a pure liquid increases exponentially with inverse absolute temperature. †¢ This relation was first expressed quantitatively by Arrhenius E? (1912). ? ? A exp( †¢ Where A is a constant for a given liquid and E? is the activation energy of viscosity. †¢ The transported molecules should overcome the activation energy in order to overcome intermolecular attractive forces. RT ) Equ. 10 †¢ A plot of ln ? against 1/T (Arrhenius plot) should be linear and have a slope equal to E? R. E ln ? ? ln A ? ? Equ. 9 RT 13 Experimental †¢ To measure the viscosity by Ostwald method, A liquid is allowed to flow through a thin-bore tube (< 1 mm) then the flow rate is determined and the physical dimensions for the tube should be known exactly. †¢ Ostwald viscometer should be calibrated with a reference liquid therefore the radius and Length of the viscometer can be known precisely. †¢ Operationally, the experiment is done by measuring the time required for a given volume of liquid to flow through the viscometer capillary. †¢ The driving force is the gravity. Ostwald viscometer is designed to keep the height of the separation of the upper and lower levels of the flowing liquid as constant as possible. 14 Calibration of the Ostwald Viscometer †¢ Ostwald viscometer is calibrated using 10 mL of purified water. The flow rate, density and known viscosity of purified water are used to calculate k. Measurement of viscosity of different solutions †¢ The viscosity of two mixed solutions with different percentages of liquids will be measured using Ostwald method. Chemicals Molar Mass(g/mol) Molecular Formula Methanol 32. 04 CH O Toluene 92. 4 CH A- Toluene/p-xylene p-Xylene 106. 16 CH Water 18. 02 HO B- Methanol/Water †¢ Measure the viscosity for each pure liquid then measure the viscos ity 20%, 40%, 60% and 80% percentages by volume. 4 7 8 8 10 2 15 Procedure: Suspend the viscometer into a large beaker (2-L) of water that is placed on a hot plate, that is as close to 25 ° C as possible. Make sure the viscometer is fully immersed in the water. 1. Pipette 10 ml of de-ionized water of known density into the Ostwald viscometer and allow time for the liquid to equilibrate to the temperature of the bath.Then use a pipette bulb to push or pull the liquid level up above the upper fiducial mark on the viscometer. Allow the water to run back down and start the timer exactly as the meniscus passes the upper mark. Stop the timer just as the meniscus passes the lower mark. Repeat at least twice. Your flow times should agree to within about 0. 4 seconds. 2. Clean and dry the viscometer by running a few milliliters of acetone through it. Drain the acetone and aspirate for about a minute to evaporate all the acetone. 3. Determine the flow times of each of your methanol/water 16 solutions at 25 ° C. Procedure: cont’d . Complete the series by measuring the flow time for pure Methanol. Repeat each at least twice. Your flow times should agree to within about 0. 4 seconds. 5. Clean and dry the viscometer as before. 6. Determine the flow times of each toluene/p-xylene solution as in step 3. End the determinations with the pure p-xylene. 7. For our temperature work heat the water bath in roughly 5 to 10 degree increments and determine the flow time of the pure pxylene as before at each temperature. Make sure that the temperature is constant. The exact temperature is not important as long as it is known to  ± 0.  °C, and that the viscometer has had time to equilibrate to a new temperature. Stop at about 60 ° C. 17 Table Data 1: The flow times of each of ( methanol/water) and (toluene/p-xylene) solutions at 25oC %by volume 100% water 20% methanol 40% methanol 60% methanol 80% methanol 100% methanol Flow time (1) (s) Flow time (2) (s) Flow time (3) ( s) Average Flow time (s) 100% p-xylene 20% toluene 40% toluene 60% toluene 80% toluene 100% toluene 18 The flow times of methanol at different temperature: Table Data 2: The flow times of p-xylene at different temperature.Temperature Flow time (1) (s) Flow time (2) (s) ( °C) 25 30 35 40 45 50 55 60 65 Flow time (3) (s) Average Flow time (s) 19 Viscosity Table of Results 1: Methanol, volume % 0% Methanol Methanol , weight % The flow times of a series of Water/Methanol solutions that are 0,20,40,60, 80, and 100% by volume. Average Flow time, t (sec) viscosity, ? (cP) ? ? k? t Fluidity F ? Density, ? (g/mL) ? 1 100% Water 20 40 0 density of H2O 0. 99704 0. 971 0. 944 ? of H2O 0. 8904 16. 54 34. 57 60 80 100 54. 33 76. 02 100 0. 909 0. 859 0. 788 20 Density of Methanol/Water Mixtures at 25 0CViscosity Table of Results 1: Cont’d %by volume Densi Mole fraction ln? ? ? ln? ? ? ln? A A B B ty (g/ml ) 0. 997 0. 971 0. 944 0. 909 0. 859 0. 788 Xwater =1 Xwater= Xmethanol= Xwater= Xme thanol= Xwater= Xmethanol= Xwater= Xmethanol= Xmethanol=1 viscosity ? (cP) Fluidity F ? ? A FA ? ? B FB 100% water 20% methanol 40% methanol 60% methanol 80% methanol 100% methanol 21 Viscosity Table of Results 2: The flow times of a series of toluene/p-xylene solutions that are 0,20,40,60, 80, and 100% by volume. Density, ? (g/mL) Average Flow time, t (sec) Viscosity, ? (cP) ? k? t Toluene, volume % Fluidity F ? ? 1 0%Toluene (100% pxylene) 20% Toluene 40 60 80 100 0. 857 0. 858 0. 859 0. 859 0. 960 0. 861 Density of Toluene/p-Xylene Mixtures at 25 °C 22 Viscosity Table of Results 2: Cont’d %by volume 100% pxylene 20% toluene 40% toluene 60% toluene 80% toluene 100% toluene Densit y (g/ml ) 0. 857 0. 858 0. 859 0. 859 0. 960 0. 861 Mole fraction ln? ? ? A ln? A ? ? B ln? B viscosity ? (cP) Fluidity F ? ? A FA ? ? B FB Xp-xylene =1 Xtoluene = Xp-xylene = Xtoluene = Xp-xylene = Xtoluene = Xp-xylene = Xtoluene = Xp-xylene = Xtoluene =1 3 Table of Results 3 : T(oC) 20 25 D (g mL-1) 0. 879 0. 857 ln ? vs. 1/T ln ? T(K) 1/T Average ? Flow time, ? ? k? t t (sec) 30 35 0. 852 0. 848 40 45 0. 943 0. 839 50 55 0. 834 0. 830 60 0. 825 24 1. Determine the viscosity coefficient for the methanol/water solutions and toluene/p-xylene solutions using equation ? ? k?. t Calculate Fluidity using equation ? 2. Calculate viscosity ? for the above solutions using equation ln? ? ? A ln? A ? ? B ln? B Calculate Fluidity using equation for all above solutions using equation F ? ? A FA ? ? B FBData Analysis F ? 1 3. Compare the viscosity of the methanol/water mixtures to the toluene/pxylene mixtures by graphing the value of the viscosity coefficient (? ) versus the volume percentage of each mixture. Comment on the shape of the graphs. Comment on the â€Å"ideality† of the two solutions. 4. Next look at the dependence of viscosity of p-Xylene on temperature. Plot ln ? vs. 1/T and determine the activation energy and the error in the activation energy. (Use Excel to get t he error in the slope and use it in a simple propagated error analysis) 25

Benefits of Tourism in Singapore

Benefits of Tourism in Singapore 1.0Â   Introduction 1.1 Definition of Tourism industry Tourism refers to the movement of people from different social and cultural background travelling out of their usual environment staying in a different place for business, personal, or professional reasons. These people are commonly referred to as tourist. Their actions in the country they visit affects the local economic market as they carry out their activities, as most of which may require them to spend money thus increasing the expenditure in the local markets which in turns boosts the GDP of the respective country (Media.unwto.org, 2014b). Therefore the tourism industry is formed to cater to the needs and demands of locals and tourists in terms of products and services and is defined as such in this report. 1.2 What does the tourism industry mean to Singapore? As Singapore lacks natural resources, the tourism industry serves as an integral factor that acts as a crucial pillar for the economy of Singapore. It contributes an estimated 4% to the gross domestic product of Singapore and also provides jobs to about 160,000 people. The tourism industry serves to reaffirm Singapore’s position as a global cosmopolitan city that is dynamic, able to cater to the locals’ and tourists’ demands for leisure, entertainment, giving consumers enhanced quality and diversity in terms of leisure creating a wider range of options creating a vibrant living environment that Singaporeans can proudly call home (Stb.gov.sg, 2014). 2.0Â   Economic Impact Analysis Four types of Economic Impacts that Tourism have on the economy 1-Direct contributions Tourism’s direct contributions are results of revenue earned from tourists’ expenditure by businesses like hotels, restaurants, retail outlets, transportation services, cultural / sports and recreational services. 2-Indirect contributions Some of the indirect contributions derive from investment spending from the businesses of the travel and tour ism, Government expenditure in the form of investment to improve or enhance the industries. 3-Induced contributions The direct and indirect employees involved in this sector then in turn contributes to the consumption by spending their wages on food and beverages, recreational activities, clothes, housing and household goods. 4-Total contributions Therefore the total contributions from the direct, indirect and induced contributions will in turn affect the GDP and the employment rate as they affect various factors of the GDP equation which also affects the production rate thus increasing the GDP and employment rate in a situation when there is an increase in revenue and demand from tourist and with certis paribus assumed. 2.1 Contributions to Singapore’s GDP The latest press release by UNWTO World Tourism Barometer, shows that expenditure receipts international visitors spent on food and beverages, services, entertainment, accommodations and much more totaled up to an estima ted SGD$ 1,455 billion during 2013. And that the growth rate of receipts experienced a 5% increase from 1035 million during 2012 to 1087 million during 2013(Media.unwto.org, 2014a). According to an economic report by Singapore’s Travel and Tourism Economic Impact report 2014, in 2013 travel and tourism’s direct contribution to Singapore’s GDP was SGD$ 19.1 billion (5.3% of total GDP) Singapore’s GDP. Its GDP contributions in 2014 is expected to experience a 5.8% increase, and also to experience a 3.4% increase per annum, as of 2014-2024, to SGDS$ 28.3 billion as of totaling a 5.3% of the total GDP in 2024 (World Travel and Tourism Council, 2014).

Ectopic Pregnancy Essay Example | Topics and Well Written Essays - 1000 words

Ectopic Pregnancy - Essay Example Ectopic pregnancy occurs in various places such as cervix, ovaries, peritoneal cavity, or interstitial tissue but more than 96% of all ectopic cases occur in the fallopian tubes (McCulloch 2007 and Togas 2006). This tube is in-charged of carrying fertilized ovum from the ovary down to the uterus ('Ectopic Pregnancy'). However, when the fertilized ovum implants and grows inside the fallopian tube, this will weaken the wall and eventually rupture the tube (McCulloch 2007). A ruptured ectopic pregnancy is a true medical emergency. It is the leading cause for 10 to 15 percent of all maternal deaths (Tenore 2000). In 2001, the Confidential Enquiry into Maternal Deaths (CEMD) 2001 reported that there are 5 women who die every single year from ectopic pregnancy. The report also revealed that one of the main reasons of maternal death was due to substandard care and the failure to detect early ectopic pregnancy. Indeed, it is important to be aware of the predisposing risk factors as well as investigate early signs and symptoms of ectopic pregnancy to prevent further mortality rates ('The Ectopic Pregnancy Trust'). There are a lot of predisposing risk factors associated with ectopic pregnancy and this include current or previous pelvic infection, primary infertility, history of ectopic pregnancy, prior tubal surgery, endometriosis, a history of abdominal or pelvic surgery, acute appendicitis, in-utero exposure to DES, vaginal douching, smoking, progestin pills, and use of an intrauterine device (IUD) (Tenore 2000 and Tay et al. 2000). In addition, assisted reproductive technology may compromise tubal structure and function which increases the risk of ectopic pregnancy. These include ovulatory induction medications, and in-vitro fertilization, or gamete intrafallopian transfer (McCulloch 2007). Here is a case study describing the experience of having an ectopic pregnancy. A 33year old female had been trying to conceive for four years, became pregnant with the help of fertility treatment (do not have details). At five weeks into her pregnancy she began to have one-sided pain and slight spotting. She was seen by her own consultant, follow-up tests were given, pregnancy test which was positive, a beta-Hcg test and a scan which showed her uterus to be empty. Later the same afternoon this lady was taken to the operating theatre and anaesthetised with cricoid pressure because she had eaten. A laparoscopy was carried out which show that she had ruptured tube. She lost her baby and one of fallopian tubes, which reduced her conceiving again by approximately 50% because she only has one fallopian tube now. This lady life was saved, but she was in grief for her lost child. She stays in the care of the hospital for two days, before going home under the care of the consultant. Her care has not been carried out by the NHS. This was her wishes. According to biopsychoscocial model, the patient's perception of ectopic pregnancy arises from a combination of her biological, emotional state, and concomitant social determinants. This model explains the phenomenon of signs and symptoms associated with ectopic pregnancy shifting to the patient's underlying psychological or social concerns (Geri et al. 2000 and Lakhan 2006). In the case study above, the patient was described to receive fertility treatme

Elements of Religious Traditions Research Paper Example | Topics and Well Written Essays - 750 words

Elements of Religious Traditions - Research Paper Example The paper would discuss its relationship with various elements of social interaction. Identifying critical issues God is a supreme being in different religions vis-a-vis Christianity, Islam, Hinduism, Judaism, Buddhaism etc. The varying traditions and their interpretations therefore become critical issues to define human behavior and actions, especially with regard to various socio economic and political paradigms which have catalytic effect on all people cutting across nationality, race, culture and color. The racial prejudices, gender inequality, capitalistic structure of society and even national boundaries are seen as going against the basic posit of religions’ core beliefs. This also raises the need to examine religion in various perspectives to gauge its responses amongst the people who practice it in different format and expressions. Relationship with divine God’s supremacy is recognized within all religious scriptures and exemplifies its relationship with the Di vine in terms of behavior that is morally and ethically correct. The Bible teaches to be God fearing and stresses the need to repent by the sinners. It believes that God has endowed man with free will so he can follow his course of actions that would lead him towards the God. The sinful acts would lead him to purgatory and therefore repentance becomes intrinsic part of Christianity. Hinduism also reveres God as Creator and inculcates God fearing tendencies for fear of going to hell rather than heaven. Thus, in all religions, good actions are encouraged because they bring men closer to God. Relationship with sacred time Religious traditions and scriptures are abound with the notion of eternity and the scientific theory of evolution of man which has faced tremendous pressure from the Church and other religions. The theory of creation and orthodox Jews beliefs that ‘our history had been preceded by untold cosmic cycles of millions and billions of years’ (N.d, 2010, reading 1). The Hinduism’s concept of rebirth delineates the concept of time to surreal realities which are but the imagery of our physical self. In religious traditions, sins and purgatory would invite wrath of God, resulting in ultimate destruction of the world. The sacred time, therefore is important aspect where events occur in cyclic order irrespective of the fact whether it is desired or not. Thus, prayers become important part of religious traditions. Relationship with sacred space or natural world World is created by God and Human beings are called to work as God's stewards. The created order is entrusted to humanity, not as individuals, but as a community. The private property right is therefore embedded in an inclusive concept of common property of all people and is never allowed to become an absolute right that excludes others completely (Graafland, 2008, reading 3) Religious conceptualization of space and natural world delimits the manmade boundaries of nations. Everythin g belongs to God and respect and healthy regard for all elements of the earth become intrinsic to religious philosophy. Merleau-Ponty (reading2, 1965) says that there are two world, one external that needs space or territory and the internal one or ‘agora’ that resides within oneself. Agora continuously provokes people to move and thereby ‘

The Joke by Milan Kundera and how it relates with history of European, Essay

The Joke by Milan Kundera and how it relates with history of European, the Czech society, socialism, totalitarianism and any oth - Essay Example Consequently, the thesis statement of this paper is that the author criticises the communist ideology in Czechoslovakia. Analysis The idea of communism when it was introduced in many of the Eastern Europe countries was to create optimism on the people that they will be equal in acquiring and enjoying social and economic benefits (McKay, 2007). Ideally, the ideology was targeting the equal distribution of the resources in the society to enable people to grow equally on social benefits. This political idea has been castigated by the author as an opium system. Indeed, the author illustrates how one of the characters in the fiction novel wrote in a postcard critiquing the notion of optimism in a society. "Optimism is the opium of the people! A healthy atmosphere stinks of stupidity! Long live Trotsky!" (Kundera 18). This observation of the author through the use of the character in the fiction novel, illustrates how the writer thought of the communist ideology in the republic of Czechosl ovakia during those days. Inasmuch the idea of communism in the country was to draw equality in the lives of the population, the system according to the writer, was pegged on optimism to the people that social and economic benefits will be distributed equally for their own good. ... Consequently, the statement from the novel depicts how the writer blames the communist ideology in Czechoslovakia in beholding them from participating in innovative and creative activities to improve their lives. Another aspect that has been demonstrated in the fiction novel by the writer in critiquing the communist idea is the imprisonment of the mind. This implied the effect of the political system that was practiced in the country in preventing the population in questioning the rationale of the government actions. Thus, the writer demonstrates how the communist ideology in his country had blinded the minds of the population in holding the government accountable in carrying out the state’s affairs. Indeed, the writer illustrates how one of the characters described another character in the fiction novel as unable to go beyond the government rhetoric in questioning its action. In addition, the writer demonstrates how the population is politically constrained in understanding t he ills of the government actions due to the legal system that was introduced by the communist ideology. "She was constitutionally unable to look behind anything; she could only see the thing itself" (Kundera, 143). In contrast, the communist idea in the history of European society was agitated to end the capitalism ills in imprisoning the population. Indeed, it was argued that the capitalism ideology had imprisoned the minds of the population due to its embracement of materialism in the society (McKay, 2007). However, the fiction novel demonstrates how the communist idea failed in liberating the population in questioning the actions of their own government. Indeed, the author demonstrates how one of the character