Children aged 12 are more affected by digestive issues due to unclean water and contaminated food. They commonly suffer from diarrhea at this age because of unclean food items. Additionally, children often drink unclean packet water or other unclean water sources, which can cause diseases. Eating uncleaned foods from hotels or fast food can also negatively impact children's health.
The document is about a game where the player tries to identify which animal is a cow from multiple choices, and provides feedback depending on if they are correct or incorrect, then offers the option to play again or end the game, and provides the names of the creators.
Este documento presenta la vida de Louis Ernesto Azael Hernández Martínez desde su nacimiento hasta los 20 años. Incluye fotos de su familia, incluyendo a su mamá, papá, hermano y novia que han jugado un papel importante en su vida. Actualmente estudia en la FCC y planea obtener una maestría, casarse, formar una familia y ser feliz.
Children aged 12 are more affected by digestive issues due to unclean water and contaminated food. They commonly suffer from diarrhea at this age because of unclean food items. Additionally, children often drink unclean packet water or other unclean water sources, which can cause diseases. Eating uncleaned foods from hotels or fast food can also negatively impact children's health.
The document is about a game where the player tries to identify which animal is a cow from multiple choices, and provides feedback depending on if they are correct or incorrect, then offers the option to play again or end the game, and provides the names of the creators.
Este documento presenta la vida de Louis Ernesto Azael Hernández Martínez desde su nacimiento hasta los 20 años. Incluye fotos de su familia, incluyendo a su mamá, papá, hermano y novia que han jugado un papel importante en su vida. Actualmente estudia en la FCC y planea obtener una maestría, casarse, formar una familia y ser feliz.
learn 4 d lifecycle and prepare a document on supply & demandvignesh palani
This document discusses medical supply and demand and how it defies traditional economic principles due to various externalities in healthcare. It defines economic externalities as costs or benefits of market transactions not reflected in prices. Relevant medical externalities include barriers to entry and competition from extended education, competitive advantages from degrees, monopsony/oligopsony power over providers, barriers to exiting practice, prioritizing patient welfare over profits, and moral hazards from unhealthy behaviors. Other externalities driving up costs are group insurance detaching consumers from costs, difficulty knowing best healthcare purchases, and doctors influencing demand more than consumers.
Note: If this publication all links are dead, but you need to download files from this publication, please send me a private message and I'll try to help you or emai to info@presslounge.vn for supporting
Disclaimer: We do not encourage illegal activity. References to a content protected by the copyright law, are given exclusively in the fact-finding purposes. If you liked the program, music or the book – buy it.
web 2.0 template, theme, layout mechanisms vignesh palani
Web 2.0 template designs have become popular for businesses as they allow for a fresh new look and follow current design trends. The templates have changed from older web designs by modifying elements like the background and fonts. Our new Web 2.0 templates are easier to use and customize.
Note: If this publication all links are dead, but you need to download files from this publication, please send me a private message and I'll try to help you or emai to info@presslounge.vn for supporting
Disclaimer: We do not encourage illegal activity. References to a content protected by the copyright law, are given exclusively in the fact-finding purposes. If you liked the program, music or the book – buy it.
This document summarizes research on the ecological significance of mycorrhizal associations in ferns. Several studies found that many fern species engage in mutualistic relationships with mycorrhizal fungi, especially vesicular-arbuscular mycorrhizal fungi. However, results from studies of Hawaiian and other ferns contradict some predicted patterns about the presence of mycorrhizae in more "advanced" fern families. Further research is needed to better understand how mycorrhizal relationships may influence fern physiology and distribution patterns.
El documento presenta un análisis del sector del aguacate a nivel mundial. Señala que se espera un crecimiento continuo del comercio internacional de aguacate, concentrado principalmente en 8 países, especialmente EE.UU. Analiza los principales países productores y exportadores, destacando a México por su alta productividad y volumen de exportaciones. También resalta retos para Colombia como la baja ventana de oportunidad por estacionalidad y la necesidad de mejorar rendimientos y calidad para competir.
learn 4 d lifecycle and prepare a document on supply & demandvignesh palani
This document discusses medical supply and demand and how it defies traditional economic principles due to various externalities in healthcare. It defines economic externalities as costs or benefits of market transactions not reflected in prices. Relevant medical externalities include barriers to entry and competition from extended education, competitive advantages from degrees, monopsony/oligopsony power over providers, barriers to exiting practice, prioritizing patient welfare over profits, and moral hazards from unhealthy behaviors. Other externalities driving up costs are group insurance detaching consumers from costs, difficulty knowing best healthcare purchases, and doctors influencing demand more than consumers.
Note: If this publication all links are dead, but you need to download files from this publication, please send me a private message and I'll try to help you or emai to info@presslounge.vn for supporting
Disclaimer: We do not encourage illegal activity. References to a content protected by the copyright law, are given exclusively in the fact-finding purposes. If you liked the program, music or the book – buy it.
web 2.0 template, theme, layout mechanisms vignesh palani
Web 2.0 template designs have become popular for businesses as they allow for a fresh new look and follow current design trends. The templates have changed from older web designs by modifying elements like the background and fonts. Our new Web 2.0 templates are easier to use and customize.
Note: If this publication all links are dead, but you need to download files from this publication, please send me a private message and I'll try to help you or emai to info@presslounge.vn for supporting
Disclaimer: We do not encourage illegal activity. References to a content protected by the copyright law, are given exclusively in the fact-finding purposes. If you liked the program, music or the book – buy it.
This document summarizes research on the ecological significance of mycorrhizal associations in ferns. Several studies found that many fern species engage in mutualistic relationships with mycorrhizal fungi, especially vesicular-arbuscular mycorrhizal fungi. However, results from studies of Hawaiian and other ferns contradict some predicted patterns about the presence of mycorrhizae in more "advanced" fern families. Further research is needed to better understand how mycorrhizal relationships may influence fern physiology and distribution patterns.
El documento presenta un análisis del sector del aguacate a nivel mundial. Señala que se espera un crecimiento continuo del comercio internacional de aguacate, concentrado principalmente en 8 países, especialmente EE.UU. Analiza los principales países productores y exportadores, destacando a México por su alta productividad y volumen de exportaciones. También resalta retos para Colombia como la baja ventana de oportunidad por estacionalidad y la necesidad de mejorar rendimientos y calidad para competir.
1. Tutorium #5
10.5. bzw. 17.5.
c.deckert@me.com
Bei dieser Ausarbeitung handelt es sich um keine offizielle Lösung
des Lehrstuhls. Dies sind nur Lösungsansätze, welche keinen
Anspruch auf Korrektheit oder Vollständigkeit erheben.
Monday, May 10, 2010
3. Agenda
• Aufgabe 1: Mutexe und Sempaphore
• 2. Aufgabe (Deadlocks)
Monday, May 10, 2010
4. Aufgabe 1
• Java bot ursprünglich nur folgende Möglichkeiten
zur Synchronisation an:
• Das Attribut synchronized für Methoden. Damit
wird im Methodenrumpf gegenseitiger
Ausschluss realisiert.
• Die Monitor-Methoden wait() und notify().
Diese Methoden können für jedes Java-Objekt
aufgerufen werden. Die Methode notify() hebt
eine durch wait() hervorgerufene Blockierung
im Objekt auf.
Monday, May 10, 2010
5. public class Semaphore
{
int s;
public Semaphore(int initial)
{
s = initial;
}
synchronized public void P() throws InterruptedException
{
s--;
if (s < 0) wait();
}
synchronized public void V()
{
s++;
if (s <= 0) notify();
}
Monday, May 10, 2010
6. Aufgabe 1b
• Nehmen wir an, dass wir ein Betriebssystem
haben, das nur Mutexe unterstützt, wir
aber trotzdem Semaphore verwenden
möchten. Überlegen Sie sich, wie Sie einen
Semaphor mit Mutexen implementieren
können. Diese Lösung sollte kein busy
waiting verwenden. Da das System nur
Mutexe unterstützt, dürfen auch keine
Interrupts abgeschaltet werden, etc.
Schreiben Sie Ihre Lösung in Pseudo-code
auf.
Monday, May 10, 2010
9. class Semaphore
{
Mutex wait = new Mutex(0);
int value;
public Semaphore(int initalValue)
{
value = initalValue;
}
public void Down() public void Up()
{ {
if (value == 0) if (wait.ProcessesWaiting())
{ {
wait.Lock(); wait.Unlock();
} }
else else
{ {
value = value--; value = value++;
} }
} }
}
Monday, May 10, 2010
10. 2 Probleme:
• Änderungen von value sind nicht geschützt, wenn
mehrer Prozesse Up() bzw. Down() gleichzeitig
ausführen. Dieses Problem lässt sich mit einem
weiteren Mutex protect lösen, so dass Up() und
Down() mutually exclusive sind.
• Wie sieht die Methode „ProcessesWaiting()“ aus?
Mit anderen Worten: Wie finden wir heraus, ob auf
wait gerade Prozesse warten? Eine Möglichkeit ist,
die Anzahl der wartenden Prozesse in einer Variable
count zu speichern. Dabei muss natürlich auch
count geschützt werden.
Monday, May 10, 2010
11. class Semaphore
{
Mutex wait = new Mutex(0);
Mutex protect = new Mutex(1);
int value;
int count = 0;
public Semaphore(int initalValue)
{
value = initalValue;
}
public void Down() public void Up()
{ {
protect.Lock(); protect.Lock();
if (value == 0)
{ if (count > 0)
count = count++; {
protect.Unlock(); count = count--;
wait.Lock(); wait.Unlock();
} protect.Unlock();
else }
{ else
value = value--; {
protect.Unlock(); value = value++;
} protect.Unlock();
} }
}
}
Monday, May 10, 2010
12. Aufgabe 2
• Ist es möglich einen Deadlock zu geraten,
an dem nur ein Prozess beteiligt ist?
Begründen Sie Ihre Antwort.
Monday, May 10, 2010
13. Antwort
• Nein. Das folgt direct aus der Hold-and-
Wait Bedingung. (Folie 16)
Monday, May 10, 2010
14. Aufgabe 2b
• Deadlock Detection: Betrachten Sie den
folgenden Resourcen-Graphen. Befindet
sich das System in einem Deadlock?
Monday, May 10, 2010
15. Antwort
• Ja, es ist in einem Deadlock, da es einen
Zyklus im Graphen gibt (S -> C -> F).
Monday, May 10, 2010