Part 1: Pesticide Spraying Case Study An insect pest has attacked about 20 percent of the trees in a pure stand of white pine. In an effort to reduce his economic loss, the owner has his forest crop sprayed each spring with a relatively new pesticide. The species that he is trying to eliminate is normally preyed upon by other insects, a parasite, and song birds from nearby woods. To the south of his property is a bird sanctuary for rare species of waterfowl and the carnivorous osprey. He has been assured that natural barriers and the wind direction will keep the pesticide out of the wildife area. The three areas shown on the diagram (Figure 1) were carefully studied over a five-year period by researchers from a nearby university. Insect populations were estimated, fish and bird populations studied, soil samples collected, and pesticide concentrations measured in an effort to determine the overall environmental influence of this new pesticide. The results are recorded in Table 1.
Part 1: Pesticide Spraying Analysis. Use your graph and data table to answer these questions. 1. Plot a graph which shows the changes over time of the population of insect pests in each area: A, B and C. a. Why did the population of pests in Area A increase in 1978 when, in 1977 , it appeared that the pest had been almost completely eliminated? b. What indication is there that Area $C$ has not been directly affected by the aerial spraying of the pesticide? 2. Discuss the effect that the pesticide had on natural pest controls in each area. a. Which categories would be considered natural pest controls? b. How did this eventually influence the size of the population? 3. Consider the effect that the pesticide had on fish and bird species. a. Why is the concentration of pesticide so high in fish and bird species? b. What change in the concentrations of pestidide in the fish and bird life represent the point where significant change in mortality occurs? c. Suggest a food chain that would link the pine stand vegetation to the poor nesting success of the birds. 4. What method(s) could be used to remedy this "eco-mess"? 5. How did the use of this pesticide affect species diversity and therefore environmental stability?
Conclusions. 6. Name two benefits for the use of commercially produced chemical pesticides: 7. Name two problems that are caused by the use of commercially produced chemical pesticides: 8. Name two benefits to the use of integrated pest management practices: 9. Name two problems caused by the use of integrated pest management practices:
Elaborate the following for the DHL company for the issue of delivering wrong orders to customers: - Develop and analyze comprehensive cause and effect diagram (fish bone diagram) of the issue. - Try to provide diagrammatic/illustrative explanation and give description of the each and every step.
Design a 4-bit UP-DOWN counter. It counts 1 to 7 only. The middle output is 1111. Include truth table, K-map with equation, and decoder implementation. Please answer fast 20 mins left
Complete MS Project Exercise 2 on Appendix A: Brief Guide to Microsoft Project Professional 2016 2. Continue performing the steps in this appendix, starting with the section called Developing the Schedule. Print out the following screens or send them to your instructor, as directed: a. Figure A-32. All task durations and recurring task entered b. Figure A-39. Network diagram view c. Figure A-46. Changing Work hours for tasks d. Figure A-56. Earned value report e. Continue performing the steps, or at least read them. Write a one-to-two page paper describing the capabilities of Project Professional 2016 and your opinion of this software. What do you like and dislike about it?
Continue performing the steps in this appendix, starting withthe section called Developing theSchedule. Print out the following screens or send them to yourinstructor, as directed:a. Figure A-32. All task durations and recurring task enteredb. Figure A-39. Network diagram viewc. Figure A-46. Changing Work hours for tasksd. Figure A-56. Earned value
I need answer in C++. Thank You. Project on pharmacy management system in c++ with oop concepts classes (medicine type, administration, cashier, manager, customer, owner) for software engineering mapping abstract class encapsulation inheritance friend function polymorphism association
Please DO NOT respond to this question by copy/pasting the code provided elsewhere on the site, none of those work. Thanks. Virtual Memory Lab This lab project addresses the implementation of page-replacement algorithms in a demand-paging system. Each process in a demand-paging system has a page table that contains a list of entries. For each logical page of the process, there is an entry in the table that indicates if the page is in memory. If the page is in memory, the memory frame number that page is resident in is indicated. Also, for each page, the time at which the page has arrived in memory, the time at which it has been last referenced, and the number of times the page has been referenced since the page arrived in memory are maintained. The page table data structure is a simple array of page-table entries (PTEs). Each PTE contains five fields as defined below: struct PTE < int is_valid; int frame_number; int arrival_timestamp; int last_access_timestamp; int reference_count; >Each process in the system has a page table that is simply an array of PTEs. Each process also has a pool of frames that is allocated. The frame pool for a process is represented as an array of integers, where each Integer represents the frame number of a frame that is free and is available for use by the process. Note that in order to get the frame number in the pool, you first need to access the integer in the array. This lab project aims to exercise the various policies for page replacement. In particular, we study the following three page-replacement policies: First-In-First-Out (FIFO) Least-Recently-Used (LRU) Least-Frequently-Used (LFU) In order to implement the above policies, we need to develop corresponding functions that process page accesses for a process. That is, for each process, given its page table, a logical page number being referenced and the free frame pool of the process, the functions should determine the memory frame number for the logical page. Also, the functions should modify the page table and the free frame pool appropriately. The details of the functions with respect to the different policies are described below. You need to develop code for these functions that implement the specifications. Place the code in a file called virtual.c. You should include the oslabs.h file.
