Band broadening theory (Van Deemter equation) It is well recognized now that column band broadening originates from three main sources: 1. multiple path of an analyte through the column packing; 2. molecular diffusion; 3. effect of mass transfer between phases. In 1956 J.J. Van Deemter introduced the equation which combined all three sources and represented them as the dependence of the theoretical plate height (HETP) on the mobile phase linear velocity. Originally‚ it was introduced for gas
Premium Chromatography Gas chromatography Analytical chemistry
Case Study 6 IKEA: Culture as competitive advantage Suggested case discussion questions Q1 Explain how IKEA’s culture contributed to its early expansion efforts IKEA’s culture is encapsulated in the expression the “IKEA-way.” This is the philosophy Ingvar Kamprad formed during the early years of IKEA and drove its expansion efforts. His non-conformist ways gave him freedom to focus and innovate on all facets of distribution. His obsession with low prices‚ led to an unwavering focus
Premium Sweden Ingvar Kamprad Management
Almond 6000 7500 I I Brazil 7500 7125 Filbert 6750 7500 Pecan 6000 7200 7875 Walnut 7500 I 1 The ~ r o f icontribution Der Pound and Customer orders are: t Profit contribution per Pound Customer Orders (Pounds) Regular mix $1.65 10000 Deluxe mix $2 3000 Holding Mix $ 2.25 5000 Solution: Xij = quantity of nut (i) to mix j i= 1‚2‚3‚4‚5 j= 1‚2‚3 Profit 1$1.65 I $2.00 D I $2.25 H X13 R A F P - Available 6‚000 pounds I I I XI1 X21 I I I X12 X22 I X23 I X33
Premium Nut
Curve-Fitting Project – Linear Model: Average Sales Prices of new homes sold in the United States between 1964 and 2008 (LR-1) Purpose: To analyze the average sales prices of new homes sold in the United States from 1964 to 2008. Data: The prices were retrieved from http://www.census.gov/const/uspriceann.pdf. I chose to use the prices between 1964 and 2008 as they showed a huge increase (More data was available (see link)). Average sales prices of new homes sold in the US Year Time (seconds)
Premium Regression analysis Pearson product-moment correlation coefficient
Pedram Ghodrati Math Why do we have to learn algebra? Math is an academic subject which many students struggle to master. I remember when I was in high school‚ I always had a hard time understanding math. In senior year I almost dropped out of school because of the difficulty of high levels of math classes. I just read an article called‚ “Is Algebra Necessary?” by Andrew Hacker‚ an American political scientist and public intellectual. He is currently Professor Emeritus in the Department of Political
Premium Mathematics Arithmetic The Huffington Post
2011‚ one US dollar was equivalent to 0.7749 Euros. A linear equation of a function‚ E‚ which converts US dollars (D) to Euros (E) would be E = 0.7749D You would just put the number of dollars in for "D" and multiply by 0.7749 and this will give you the number of Euros you would get for your US dollars. This is a "real world application" of a linear function. Cell Phones Just about everyone has a cell phone‚ and most rate plans are a linear function of some kind. Let’s take a look at a basic example
Premium United States dollar Currency
Newton’s Laws‚ linear momentum‚ and kinetic energy. Principles In this experiment you will study a collision where a moving object strikes and sticks to an initially motionless object. When the colliding objects stick together the collision is said to be completely inelastic. The net momentum of the system should not change‚ but the net kinetic energy of the system will decrease. The amount of kinetic energy left after the collision can be predicted using conservation of momentum. Linear momentum
Premium Classical mechanics Force Mass
Definitions for Vulnerabilities) a. Fire destroys primary data center b. User downloads an unknown e-mail attachment c. Hacker penetrates your IT infrastructure and gains access to your internal network d. Workstation OS has known software vulnerability 2.) For the above identified threats and vulnerabilities‚ which of the following COBIT P09 Risk Management control objectives are affected? PO9.1 IT Risk Management Framework PO9.2 Establishment of Risk Context Workstation OS has known software vulnerability
Premium Risk Risk management Management
frequency distribution for this data set and then estimate the mean response time. Explain why your answer is only an estimate of the mean of this data set. (5 marks) (b) The numbers of SPAM EMAILS received by 750 DKIT computing students over a one week period‚ were recorded as follows: No of SPAM EMAILS Received | Number of students | less than 5 | 68 | between 5 and 10 | 176 | between 10 and 15 | 244 | between 15 and 20 | 193 | between 20 and 25 | 42 | between 25 and 30
Premium Normal distribution Standard deviation Random variable
Week 1 Knowledge Check Study Guide Concepts Mastery Biological development in infancy and childhood Score: 18 / 18 Questions 100% 1 2 3 100% 4 5 6 100% 7 8 9 100% 10 11 12 100% 13 14 15 Psychological development in infancy and childhood Social development in infancy and childhood General systems theory Life-span development‚ common life events‚ and normal developmental milestones Important concepts for 16 17 18 100% understanding human behavior Concept: Biological
Premium Parenting styles