Book Acknowledgements: Contributors and Image Sources
Acknowledgements
Contributors and Collaborators
The authors would like to thank everyone who has helped in the creation of this book:
- José Vicente Gargallo (Computing Engineer)
- Xavier Amorós (Telecommunications Engineer)
- Vicente Puchol (Agricultural Engineer and employee at Isagri)
- Daniel de las Heras (Graphic Designer)
- Ted McAleer (Voiceover Actor)
- Andy Boyns (Voiceover Actor)
- Jenn Henry (Voiceover Actress)
Image and Icon Sources
We would like to thank the following websites for the permission to reproduce
Trigonometry: Functions, Laws, and Applications
Trigonometric Functions
Even Functions: cos(-t) = cos(t), sec(-t) = sec(t)
Odd Functions: sin(-t) = -sin(t), tan(-t) = -tan(t), csc(-t) = -csc(t), cot(-t) = -cot(t)
Example: A point P(x, y) is shown on the unit circle corresponding to a real number t. Find the values of the trigonometric functions at t.
A) P(-15/17, 8/17):
- sin(t) = 8/17
- cos(t) = -15/17
- tan(t) = -8/15
- csc(t) = 17/8
- sec(t) = -17/15
- cot(t) = -15/8
Graphs of Trigonometric Functions
Amplitude, Period, and Phase Shift:
y = Asin(Bx):
- |A|: Amplitude
RMI Elevator System: Server-Side Code Analysis
AscensorRMI: Server Package
This section details the AscensorRMI class, which extends UnicastRemoteObject and represents a remote elevator object.
package server;
import java.rmi.*;
import java.rmi.server.UnicastRemoteObject;
import interfaz.GestorAscensores;
public class AscensorRMI extends UnicastRemoteObject {
private static final long serialVersionUID = 1L;
Gate door;
private int floor;
private int state;
private int id;
int model;
public AscensorRMI(int num) throws Network Device Configuration: Comprehensive Command Reference
Network Device Configuration Commands
This document provides a comprehensive reference to configuration commands for network devices.
- aaa: Authentication, Authorization and Accounting.
- access-list: Add an access list entry.
- alias: Create command alias.
- arp: Set a static ARP entry.
- banner: Define a login banner.
- boot: Boot Commands.
- buffers: Adjust system buffer pool parameters.
- cdp: Global CDP configuration subcommands.
- clock: Configure time-of-day clock.
- cluster: Cluster configuration commands.
- cns: CNS Subsystem.
Essential MS-DOS Commands & Batch Scripting
Essential MS-DOS Commands & Batch Scripting
Basic MS-DOS Commands
Here’s a list of fundamental MS-DOS commands:
- CD – Change from one directory to another.
- CLS – Clears the screen and returns the cursor to the top.
- COPY – Copies files.
- DATE – View or change the date.
- DEL – Deletes files.
- DIR – Displays a list of files and directories (folders) within a directory.
- PATH – Specifies paths where the operating system searches for executable files.
- EXIT – Closes the MS-DOS window.
- MD – Creates a new folder (directory)
Yelp Dataset Analysis with Spark: Business Insights
Yelp Dataset Analysis with Spark
This document outlines a Spark-based analysis of the Yelp dataset to extract valuable business insights. The analysis includes category-based business performance, user review patterns, and location-specific trends.
Data Loading and Preparation
First, we load the business data from a JSON file:
val path = "/Users/ishanhanda/Downloads/yelp_dataset_challenge_round9/yelp_academic_dataset_business.json"
val businessDF = spark.read.json(path)Next, we flatten the categories