Notes, summaries, assignments, exams, and problems

Vida San Sebastian was born in 1872. He studied medicine but soon served as a doctor. His contacts with writers led him to indulge his literary vocation. 1900 he published first books. 1911 the tree of knowledge, articles and essays, 17 novels. 1935 consolidated fame, joins civil war SAR surprises in the Basque country and goes to France. 1940 back to Madrid, creative capacity is exhausted, he died in 1956. Personality lonely and bitter mood, sincere, more sensitivity is necessary, shy spirit of independence and opted for self-reflection to which it attributed to an imbalance and a spirit of mad man. Pessimistic about the man and the world, felt tenderness for helpless beings, not whether the world would be happy for it to mourn a child. In... Continue reading "Pio Baroja, and "The Tree of Knowledge"" »

pure substance: is a phase of uniform composition and unchanging can not be decomposed into other substances of different classes by physical methods.

elements: they are pure substances that can not be decomposed into simpler ones through normal chemical processes.

compounds: they are pure substances made up of two or more elements, which can be decomposed by chemical methods on the elements of which are constituted. A compound always has the same elements and the same proportions regardless of the process followed.

Blended is an aggregation of different substances without causing any chemical reaction between them and therefore may be separated by physical methods.

ponderal laws: they refer to the quantity of matter of different substances... Continue reading "Laws ponderal" »

To sort the diversity of life using a rating system. Kingdom, phylum. sub class, super, order, sub groups, sub, genus, species, sub. Hierarchical binomial nomenclature, the greater the taxa categories. To reconstruct the phylogeny of a group uses a character that varies among members (ancestral character.) Is also used to compare outgroup (outgroup ) This is phylogenetically close, but not part of the study group. For any phylogenetic reconstruction we need to consider the characters that we use in our analysis and determine which is the primitive condition that presents the common ancestor of several. In this sense, we use the apomorphies that
refer to a derived or specialized character. In contrast, plesiomorphic, is a primitive character.

Pharmacology Fundamentals

Medical Prescription Components and Units

A medical prescription includes the date, patient identification (such as name, age, and weight if relevant), the Rx symbol (meaning "take"), the inscription (drug name, strength, dosage form, and quantity), the subscription (instructions to the pharmacist), the signatura or "Sig." (directions for the patient including route, frequency, and duration), the prescriber's information (name, signature, license number), and refill instructions. Units of measurement include micrograms (µg), milligrams (mg), grams (g), milliliters (mL), liters (L), concentrations such as percentage (%) and mg/mL, international units (IU), and sometimes weight per kilogram of body weight. Obsolete units... Continue reading "Pharmacology Essentials: Drug Forms, Actions, and Therapeutic Classes" »

C Linked List Implementations for Student Data

This document presents two distinct C language implementations for managing student records using linked lists: a singly linked list and a circular linked list. Both examples demonstrate fundamental data structure operations such as adding, deleting, searching, and displaying student information.

1. Singly Linked List Implementation

This section details a student management system built using a singly linked list. Students are stored in ascending order of their roll numbers, and duplicate roll numbers are prevented.

Core Structure and Global Head

The Student structure defines the data for each node, including roll number, total marks, average, and a pointer to the next student. The head pointer always... Continue reading "C Linked List Student Data Management Systems" »

English Verb Tenses: Usage & Keywords

Present Simple Tense

• Usage: Routines, habits, facts.
• Example: Juego (I play)

Present Continuous Tense

• Usage: Actions happening now, at the moment, this week, currently.
• Keywords: Now, at the moment, this week, currently, next month (for future arrangements).
• Note: Stative verbs (e.g., verbs of liking, feeling, knowing) are generally not used in continuous tenses.
• Example: Estoy jugando (I am playing)

Present Perfect Tense

• Usage: Actions completed at an unspecified time, or actions that started in the past and continue to the present. Often specifies duration.
• Keywords: Yet, already, just, since, ever, always, never, once, twice, times.
• Note: Since is often used with verbs of feeling to indicate duration.
• Example:

English Grammar Essentials

Active and Passive Voice Tenses

Time Clauses and Subordinating Conjunctions

Introduction to OOP Concepts

This document presents practical code examples demonstrating fundamental Object-Oriented Programming (OOP) concepts in both Delphi (Pascal) and C++. It covers class definitions, object instantiation, properties, events, static members, inheritance, polymorphism, memory management, and exception handling.

Delphi Object-Oriented Programming

The following Delphi code illustrates the creation of classes, properties, events, and static members, along with their usage in a console application.

program Cheat;
{$APPTYPE CONSOLE}

uses
  SysUtils, Classes;

type
  TNotify = procedure(Sender: TObject) of object;

  TEngine = class
    procedure Start;
    begin
      Writeln('Engine Started');
    end;
  end;

  TCar = class

Understanding Passive Voice and Reporting Verbs

1. Passive Voice with Modal Verbs

• Passive with Modal Verbs (Present):

  Subject + modal + be + past participle

  Example: This jacket should be worn in cold weather.

• Passive with Modal Verbs (Past):

  Subject + modal + have + been + past participle

  Example: My phone must have been stolen. (used to express a past situation)

2. Passive Voice with Infinitive or Verb + -ing

• Passive Infinitive:

  Subject + verb + to be + past participle

  Example: She hopes to be chosen for the school concert.

• Passive Verb + -ing (Gerund):

  Subject + verb + being + past participle

  Example: I hate being told what to eat.

3. Passive Voice with Reporting Verbs (General Beliefs)

• Passive with Reporting Verbs (to talk about general beliefs):

  Example:

Probability Concepts

• Union of Events: P(A∪B) = P(A) + P(B) - P(A∩B)
• Complement of an Event: P(A^c) = 1 - P(A)
• Intersection of B and Complement of A: P(B∩A^c) = P(B) - P(A∩B)
• Conditional Probability: P(B|A) = P(A∩B) / P(A)
• Intersection of Complements: P(A^c∩B^c) = 1 - P(A∪B)
• Mutually Exclusive Events: P(A∩B) = 0
• Independent Events: P(A∩B) = P(A)·P(B)

Binomial Distribution Parameters

• Mean (μ): μ = n·p
• Standard Deviation (σ): σ = √(n·p·q)

Binomial Distribution

Notation: B(n, p)

Probability Mass Function: P(X=a) = (ⁿ_a) p^a q^n-a

Where:

• n = number of trials
• p = probability of success
• q = complement of p (q = 1-p)

Normal Distribution

Notation: X ∼ N(μ, σ)

Important Probabilities:

• P(Z < a) or P(Z > a) can be found using a standard normal