Brainarium

actor Based Models classification, clustering, regression. Implicitly assumed that we have a lot of factors in the final model Why limit number of factors in a model? 2 reasons overfitting: when # of factors is close to or larger than # of data points. Model may fit too closely to random effects simplicity: simple models are usually better Classical variable selection approaches 1. Forward selection 2. Backwards elimination 3. Stepwise regression greedy algorithms Backward elimination v...

What do descriptive questions ask? What happened? (e.g., which customers are most alike) What do predictive questions ask? What will happen? (e.g., what will Google's stock price be?) What do prescriptive questions ask? What action(s) would be best? (e.g., where to put traffic lights) What is a model? Real-life situation expressed as math. What do classifiers help you do? differentiate What is a soft classifier and when is it used? In some cases, there won't be a line that separates a...

1. A wet chemical kitchen hood fire suppression system is primarily designed to extinguish fires involving: A) Class A only B) Class B only C) Class K D) Class C Answer: C Rationale: Class K fires involve cooking oils and fats common in commercial kitchens. Wet chemical agents saponify the oils, creating a foam layer that cools and seals off oxygen. NFPA 17A specifically addresses Class K protection. 2. What is the primary mechanism by which wet chemical agents extinguish a grease fir...

Question: Name all patient types that HVLA is contraindicated in? Answer: Osteoporosis Fractures Bone Cancer RA Downsyndrome Name all patient types that HVLA is contraindicated in? Question: If the ease of motion in TRANSLATION of a cervical spine vertebrae is to the LEFT. In what SIDEBENDING direction will this equal the ease of motion? Answer: RIGHT sidebending If the ease of motion in TRANSLATION of a cervical spine vertebrae is to the LEFT. In what SIDEBENDING direction will this ...

Type I Error: Stating that there _____ an effect or difference when NONE exist. is NO Type II Error: Stating that there _____ an effect or difference when DOES exist. is Sensitivity & Specificity DIAGNOSTIC TESTS are defined by their ____________ & _________. Sensitivity & Specificity SpPIn: high Specificity, Positive test, rules In SnNOut: high Sensitivity, Negative test, Out What does "SpPIn" and "SnNOut" mean, in regards to the Sensitivity and Specificity of a test? S...

What are the features of idiopathic thrombocytopenic purpura? prolonged bleeding time, petechiae, follows viral illness in children What is a common cause of microcytic anemia? iron deficiency What is a common cause of macrocytic anemia? folate or B12 deficiency What are the hormone findings in menopause? high FSH and LH What is the etiology of hyperuricemia? diuretics, high purine diet, leisch nyhan syndrome What are the lab findings in factor VII deficiency? prolonged PT, normal PTT...

Warfarin- Clinical Use - ️️Chronic anticoagulation Warfarin- Pregnancy - ️️CI in pregnant women--crosses placenta Warfarin- AE - ️️Bleeding, tissue necrosis Warfarin- Mechanism - ️️Interferes w/ vitamin K dependent clotting factors (II, VII, IX, X, C, S) Warfarin- Pathway, effect on PT/INR - ️️Extrinsic factor, increased PT Digoxin- MOA - ️️Direct inhibition of Na/K ATPase --> indirect inhibition of Na/Ca exchange Increased Calcium concentration --> positive...

prevalence vs incidence Prevalence - number of cases at a particular time Incidence - number of new cases odds ratio vs relative risk odds ratio: for case control studies control for disease and examine exposure odds dz+ in exposed group/odds dz+ in unexposed (a/b)/(c/d) ratio is not a fraction! so the bottom number is not the total its the unaffected relative risk: for cohort studies that control for exposures and examine who got the disease prob getting dz exposed/prob getting dz une...

Scientific Method - ️️1. Observation: prompts a question 2. Question 3. Hypothesis: educated guess 4. Experiment: has a controlled group, and an experimental group: has an independent variable and confounding variables: changes outcomes and is not controlled. 5. Results 6. Conclusion 7. Analysis Limits to the Scientific Method - ️️It cannot give insight in the generation of the value judgement. Does not generate moral statements or other types of non quantifiable subjunctive in...

JJ Thomson Cathode Ray Tube - ️️Electron Charge and Mass Robert Milikan Oil Drop - ️️Electron Mass Ernest Rutherford Gold Foil - ️️Nucleus and Proton James Chadwick Particle Accelerator - ️️Neutron chlorate - ️️ClO₃⁻ nitrate - ️️NO₃⁻ carbonate - ️️CO₃²⁻ sulfate - ️️SO₄²⁻ phosphate - ️️PO₄³⁻ hydroxide - ️️OH⁻ bicarbonate - ️️HCO₃⁻ ammonium - ️️NH₄⁺ ammonia - ️️NH₃