5. DISCRETEMATH: SchedulingThe diagram below shows the activity network for a project, where activities A to G arerepresented by vertices and the duration of each activity (in hours) is represented by thenumbers beside each edge.12StartFinish13Calculate the EARLIEST start time and LATEST start time for each activity in thenetwork.(i)je(ii)Hence, determine thea)critical path of the networkb)LATEST finish time for Activity E.3.

Critical path: The network diagram shows the activities performed to complete the particular task…

Answered: 5. DISCRETEMATH: Scheduling The diagram…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

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Activity: Interaction Models Consider the university system. Departments offer courses. Professors teach courses. Students can declare majors and are admitted to university departments if they meet minimum requirements. Students and professors have schedules based on courses they take/teach. Courses have rosters, scheduled times, and instructors. Courses may get full. Students can request to sign up for courses, and if the course is not full and they meet pre-requisites, the course is added to their schedule and the course will have them as a student in that course. Students can also drop courses. Students should be informed of the consequences such as change of status from full-time to part-time, loss of scholarships, and delays in graduation. Perform the following: 1. Create a use-case diagram for this university. Make your use-case diagram as complete as you can. 2. Pick two use cases from your use case diagram, CourseAdd and CourseDrop, and describe these use cases in the standard…
Draw a diagram for use case for vending machine. 1. Actors: • User: Interacts with the vending machine to make a purchase. • Maintenance Personnel: Responsible for restocking the vending machine and performing maintenance tasks. 2. Use Cases: • Select Product: The user selects a product they want to purchase. • Insert Payment: The user inserts the required payment (e.g., coins, bills, or cards). • Validate Payment: The vending machine verifies the payment provided by the user. • Dispense Product: If the payment is validated, the vending machine dispenses the selected product. • Provide Change: If the user's payment exceeds the product's price, the vending machine provides change. • Refill Stock: Maintenance personnel refills the vending machine with products when they run out. • Perform Maintenance: Maintenance personnel performs routine maintenance tasks on the vending machine. 3. Relationships: • User interacts with the vending machine to perform use cases such as selecting a…
The following paragraph describes a pit stop in an FI race. Draw a process map of this activity that describes the roles of the different people and how they interact (that is a process map with "swim lanes"). An FI Pit Stop A) The pit stop starts by inflating the new tyres with nitrogen. Nitrogen is used instead of air as it copes with the temperature changes better. B) Then the tyres are placed in a heating blanket that will bring the tyres up to an optimal temperature. At this temperature they are very sticky and hold the car on the road very well. C) During the race, the pit stop activities start a few minutes before, the tyres are removed from their heating blanket, tools are manned, the pit crew take their positions.
Earliest Deadline First* (star) : In Given are seven tasks A,B,C,D,E, F,G with following precedence constraints described by the graph. All tasks arrive at time to = 0, have a common deadline d = 20 and the following execution times: CDEFG 2 5 1 A B C; 3 2 4 3 i. Modify the release times and deadlines so that EDF* can be used for its scheduling. ii. Assume the additional precedence constraint E > A. Is there still a feasible schedule for the above task set? Justify your answer.
made a case diagram
3
Rock Series: A site hosts many shows a year. Artists have a name and perform several times in a series (each is a show on a different date). Series have one or more artists and have a series name and a specified seating arrangement. A series is held in one (and only one) of several halls, each of which has a hall number. Represent this situation of shows and artists with an E-R diagram.
Draw a statechart diagram based on the following hints: A course seption can be either Inactive (if the semester did not start) or Active (once the semesler started), The gelion would then become Inactive again at the and of the semester, An active section will become Empty if no students are enrolled in it, Not-Empty if less than 30 students are enrolled in it, and / ul if 30 students are enrolled in it. Note: Use your judgement for how to represent the initial state, final state, and the five states mentioned above and provide clear representation of the transitions (a minimum ef 5) between the states along with the events and actions. Also make sure to use guards (at least once) when necessary.
Fact-Finding Summary• A typical center has 300–500 members, with two membership levels: full and limited.Full members have access to all activities. Limited members are restricted to activitiesthey have selected, but they can participate in other activities by paying a usage fee. Allmembers have charge privileges. Charges for merchandise and services are recorded on acharge slip, which is signed by the member.• At the end of each day, cash sales and charges are entered into the BumbleBee accounting software, which runs on a computer workstation at each location. Daily cash receiptsare deposited in a local bank and credited to the corporate Personal Trainer account. TheBumbleBee program produces a daily activity report with a listing of all sales transactions.• At the end of the month, the local manager uses BumbleBee to transmit an accounts receivable summary to the Personal Trainer headquarters in Chicago, where member statements are prepared and mailed. Members mail their payments to…
(a) Modules can be taken iff (if and only if) they have more than seven students registered. (b) The assessments for a module must total 100%.
Simple Team Modeling Tool (TMT) Prototype Modelers from a consortium of multiple organizations can work on developingmultiple Software and Engineering models. TMT provides some very simplisticsupports. A model has a unique model Id, a name, an optional description, and a start date.This can be regarded as the description of the model. A model is composed of one or more top-level components. A component has a id, name and an optional description. A component has a predefined type, e.g. 'Conceptual', 'Mongo_Logical', MySQL_Logical', etc. A component may have subcomponents. The actual component content may be an ER model, UML model, SysML model, etc. A component may have some relationships with other components, and the descriptions of these relationships should be stored. Construct a reasonable ERD to capture the data requirements.List the entities, relationships with multiplicities, and attributes. Specify the primarykey of an entity whenever possible. Note that you should use the…

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