| Feature | User-Level Thread (ULT) | Kernel-Level Thread (KLT) |
|---|---|---|
| Managed by | Thread library at user level | Managed directly by OS kernel |
| Creation / Switching | Fast, no kernel involvement | Slower, requires kernel intervention |
| Scheduling | Done by thread library in user space | Done by OS scheduler |
| Blocking | If one thread blocks, all threads may block | One thread blocking does not affect others |
| Portability | Portable across OS |
Session 1: orthodox neo clsscl: based of rational choice, may not consider people deviate from this model ≠ Behavioral eco: behaviors deviates in systematic and predictable ways (irrational) ealry neo classlc: hedonic psych maximize pleasure minimize pain post-war neo:refernces to unobservable mental states were unscientifc, they focused on choices of individudals that "mirrored preferences" / Methodo of Behavioral eco: laboratory experiments/field expirements/ process measures (brain scans&
...1. ¿Qué ocurre en la 7ma semana en el desarrollo embrionario del ojo?
El ojo primitivo está formado, se cierra la hendidura fetal y se inicia el proceso de diferenciación palpebral con la función del ectodermo anterior. Empieza el desarrollo de la musculatura intrínseca y extrínseca, la formación de pestañas y glándulas anexas, que derivan del ectodermo superior. El mesodermo se condensa alrededor de la vesícula óptica secundaria para formar la coroides y la esclerótica.
2. Citar 3
Repeat 1000 times the experiment you performed in Task 1, that is rolling a tetrahedron die 10 times and computing the average. Report the average and standard deviation of the 1000 experiments. The standard deviation function in R is sd(x).
S = 1000
rolls.avgs = vector(length = S)
for(simnum in 1:S){
x = 1:4
roll = sample(x, 10, replace = TRUE)
rolls.avgs[simnum] = mean(roll)
}
mean(rolls.avgs)
sd(rolls.avgs)
# compute the mean of the 1000 experiments
mean(rolls.avgs)
hist(rolls.avgs, main="
The human heart, like other mammalian hearts, is a muscular pump with four chambers. The upper two chambers are called the right atrium and the left atrium. The lower chambers are the right ventricle and the left ventricle. Both sides of the heart work simultaneously. The walls of the atria are thinner than those of the ventricles.
The right atrium receives the blood from the superior vena cava which collects deoxygenated blood from the head, neck, arms and chest, and from the inferior vena cava
Operating System: A program that acts as an intermediary between a user of a computer & the computer hardware Divided into 4 components: Hardware, OS, System/Apps, Users Fetch-Decode-Execute; Operation: 1. I/O & CPU execute concurrently 2. Device controlelr in charge of a particular device type 3. Local Buffer 4. Moves data 2/from main memory & local buffers 5. I/O from device 2 local buffer 6. Device controller informs CPU it's d1 by causing an interrupt
Q1. Write difference btw following 1. Preemptive and Non-Preemptive Scheduling 2. Program and process 3. Hard real time systems and soft real time systems 4. Time sharing and multi programming
| Point | Preemptive Scheduling | Non-Preemptive Scheduling |
|---|---|---|
| 1 | CPU can be taken away from a running process before completion. | CPU cannot be taken away; process runs until it finishes or waits. |
| 2 | Better response time but higher overhead (due to context switching). | Less overhead but poor response for short |
Spark (1914)
- June 28: Archduke Franz Ferdinand (A-H) assassinated by Gavrilo Princip (Black Hand, Serbian group).
- Black Hand opposed Bosnia’s annexation; wanted unity w/ Serbia.
- Spark = start of WWI.
Alliances
- Triple Entente: Britain, France, Russia (Italy later).
- Central Powers: Germany, A-H, Italy (switched sides).
MAIN Causes
- Militarism = arms race.
- Alliances = hostile camps.
- Imperialism = rivalry over colonies.
- Nationalism = extreme pride.
1. Define environmental law and policy and explain why it is important.
Environmental law and policy are regulations, statutes, and agreements at local, national, and international levels that protect the environment and set legal consequences for damage. They are important because they protect public health, natural resources, and ensure people’s right to live in a safe, clean, and healthy environment. They also balance economic activity with sustainability and safeguard future generations
2.