Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Computer Engineering Expert

1. Using suffix trees, give an algorithm to find a longest common substring shared among three input strings: s1 of length n1, s2 of length n2 and s3 of length n3.

2. A non-empty string α is called a minimal unique substring of s if and only if it satisfies:

(i) α occurs exactly once in s (uniqueness),

(ii) all proper prefixes of α occur at least twice in s (mimimality), and

(iii) α >= l for some constant l.Give an optimal algorithm to enumerate all minimal unique substrings of s.

3. Redundant sequence identification: Given a set of k DNA sequences, S = {s1, s2........sk }, give an optimal algorithm to identify all sequences that are completely contained in (i.e., substrings of) at least one other sequence in S.

4. Let S = {s1, s2,......,sk} denote a set of k genomes. The problem of  fingerprinting is the task of identifying a shortest possible substring αi from each string si such  that αi is unique to si  i.e., no other genome in the set S has αi. Such an αi will be called a fingerprint of si. (Note that it is OK for αi to be present more than once within si.) Give an algorithm to enumerate a fingerprint for each input genome, if one exists. Assume that no two input genomes are identical.

5. A string s is said to be periodic with a period α , if s is αk for some k>=2. (Note that αk is the string formed by concatenating α k times.) A DNA sequence s is called a tandem repeat if it is periodic. Given a DNA sequence s, determine if it is periodic, and if so, the values for α and k. Note that there could be more than one period for a periodic string. In such a case, you need to report the shortest period.

6. A non-empty string β is called a repeat prefix of a string s if ββ is a prefix of s. Give a linear time algorithm to find the longest repeat prefix of s.

7. Given strings s1 and s2 of lengths m and n respectively, a minimum cover of s1 by s2 is a decomposition s1 = w1w2......wk, where each wi is a non-empty substring of s2 and k is minimized. Eg., given s1 = accgtatct and s2 = cgtactcatc, there are several covers of s1 by s2 possible, two of which are: (i) cover1: s1 = w1w2w3w4 (where w1 = ac, w2 = cgt, w3 = atc, w4 = t) , and (ii) cover2: s1 = w1w2w3w4w5 (where w1 = ac, w2 = c, w3 = gt, w4 = atc, w5 = t). However, only cover1 is a minimal cover. Give an algorithm to compute a minimum cover (if one exists) in O(m + n) time and space. If a minimum cover does not exist your algorithm should state so and terminate within the same time and space bounds. Give a brief justification of why you think your algorithm is correct | meaning, how it guarantees finding the minimial cover (if one exists).

Computer Engineering, Engineering

  • Category:- Computer Engineering
  • Reference No.:- M91531

Have any Question? 


Related Questions in Computer Engineering

1 what is the standard for encryption currently recommended

1. What is the standard for encryption currently recommended by NIST? 2. What is the most popular symmetric encryption system used over the Web? The most popular asymmetric system? Hybrid system?

Fisch white and pooch 353 define four levels of log

Fisch, White, and Pooch [353] define four levels of log sanitization. a. Simple sanitization, in which all information except the commands issued by an intruder are deleted b. Information-tracking sanitization, in which ...

1 on average how many requests are being processed at any

1. On average, how many requests are being processed at any given instant? 2. If move to an 8-core system, ideally, what will happen to the system throughput (i.e., how many queries/second will the computer process)? 3. ...

Another simple way to generate combinations in lexical

Another simple way to generate combinations in lexical order is to start with the combination (1, 2, 3, ..., r). The next combination in each case is generated by scanning the current combination from right to left until ...

1nbsptcos 3 and 5 in windows 7 how do you open the task

1.  (TCOs 3 and 5) In Windows 7, how do you open the Task Manager? On the Processes tab, name, and describe at least three parameters that are displayed by default. Should be at least one paragraph

During most of the 20th century the united states was

During most of the 20th Century, the United States was clearly recognized as an innovation leader with an emphasis on technological innovation.  Has that changed in the 21st Century? Have other countries begun to overtak ...

1 devise a plan to compute the cost of computer crime2 what

1. Devise a plan to compute the cost of computer crime. 2. What major crimes would you include in the preceding study? 3. From your study, identify the most expensive attacks. 4. Devise techniques to study the problem of ...

1 a paged memory system has 16-bit virtual addresses and

1. A paged memory system has 16-bit virtual addresses and pages that are 1024 locations long. How many entries must the page table have? 2. If virtual addresses are V bits long, physical addresses are A bits long, the pa ...

In the text a variant of the cfb mode is proposed which

In the text, a variant of the CFB mode is proposed which encrypts individual bytes. Draw a block diagram for this mode when using AES as block cipher. Indicate the width (in bit) of each line in your diagram. We are usin ...

1 what is the maximum data rate of a channel with a

1. What is the maximum data rate of a channel with a bandwidth of 200 KHz if we use four levels of digital signaling. 2. An analog signal has a bandwidth of 20 KHz. If we sample this signal and send it through a 30 Kbps ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen