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Shadow Encoding Scheme

Thesis Info

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Author

Abdul Rasheed Rizwan

Institute

Virtual University of Pakistan

Institute Type

Public

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2017

Thesis Completion Status

Completed

Subject

Software Engineering

Language

English

Link

http://vspace.vu.edu.pk/detail.aspx?id=24

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676720947688

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In digital transmission data is encoded into electrical signal before sending over network and received signal is decoded by the receiver by using different decoding techniques. Both sender and receiver should encode and decode data by using specific rules which implemented in digitizing schemes. The line coding schemes dominate each other with their pros and cons. First phase of digitizing scheme is unipolar which is based on single polarity. Single polarity mean either 0?s or 1?s should jump from zero level to positive level. Unipolar digitizing scheme has many issues due to its simplicity. Second phase is polar digitizing scheme that further divided into Not Return to Zero (NRZ), Return to Zero (RZ) and Biphase. The problem with NRZ-Level with long bit of 0?s and 1?s while the receiver is receiving voltages of signals. Receiver cannot understand how much bits are relying on the clock. It can be an issue while synchronizing voltages to bit stream of 0?s and 1?s. NRZ-Invert provided good solution against NRZ-L due to toggle signal from negative voltage to positive level in case of 1?s stream. But the issue still exists in case of 0?s stream. The signal remains constant at level in current Tb, when there is signal of 0s bits either the signal is in positive level or negative level. RZ is second type of polar digitizing scheme which use double bandwidth with tight clock of receiver and sender. Third phase of polar is Biphase which is further divided into two parts Manchester and Differential Manchester, these provide good solution against DC component and synchronization but bandwidth consumption is high in this case. Bandwidth is an ultimate resource of network which should use properly. Third and last phase of line coding scheme is Bipolar which is further divided into three main parts but Alternative Mark Inversion (AMI) digitizing scheme is providing satisfactory solution. The problem with this scheme is 0?s stream of bit. Signal remains zero level when there is 0?s in bit of stream. In this research work, a new digital encoding scheme is proposed with name of ?Shadow Encoding Scheme? (SES). SES technique can transmit bit of 0?s and 1?s over the network without tolerating synchronization, scarifying bandwidth and justifying 0?s or 1?s long bit.Our new SES works with three level of digitizing scheme. It is surely bases on positive, negative and zero level to toggle state either it is a sequence of 1?s, 0?s or changing in every bit.
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تکفیری جماعت داعش: افکارو اثرات: تجزیاتی مطالعہ

Since the past few years, muslims all over the world are being brutally accused of severe extremism. Many muslims now a days condemn terrorism and extremism and are not willing to connect these terms with the religion Islam. However there are a few who are in favour of these things. Terrorism is basically caused by a number of different acts of brutality. Its actually a chain reaction caused by the conspiracies against Islam, double standards of different super powers and injustice to the convicted and oppressed. Killings of the innocent and unarmed in the name of aggression is some thing which is totally against the Islamic teachings. Things become more complicated and dangerous when such acts of vandalism are done in the name of religion. Although many goals of ISIS are Islam based, however these very goals are achieved through non-Islamic ways. They feel no shame and go against all the ethics and moral values to reach their goals. Hence causing much more damage to their own muslim fellows. Even the cemetries are no more safe. They kill their opponents in the worst possible way and disrespect the dead bodies by kicking and hanging them to the trees. If this situation persists, it is inevitable that ISIS might replace the Halaku Khan and Genghiz Khan is brutality.

Analysis of Alternative Extension Approaches to Technology Dissemination and its Utilization for Sustainable Agricultural Development in the Punjab, Pakistan

Agriculture is the single largest sector and dominating driving force for growth and development of Pakistan‟s economy. Its share in GDP is 24% and employs 48.4% of the total work force of the country. It also provides raw materials for the agro-based industries and adds sustainability to Pakistan‟s export earnings. At present the average yields of various crops are low as compared to their potential yields and also to those of the advanced countries. The research advancements made in the field of agriculture indicate that the available technologies have much potential, which is not being properly exploited by the farmers. The research studies indicate that lack of proper dissemination of agricultural technologies among the farmers is still of one of the major causes for their non-adoption by the farmers. For the effective dissemination of agricultural technologies among the farmers, many extension approaches have been implemented from time to time. At present three main approaches are working in the country: public sector extension approach (PSEA), participatory extension approach (PEA) and commodity specialized extension approach (CSEA) for the guidance and education of the farmers, but still the extension‟s role does not appear to be much effective. However, each approach has some strengths, which may be used by other approaches for the improvement of extension work. Keeping in view this situation, the present study was planned to analyze these three approaches in the context of technology dissemination and its utilization by the farmers. For this purpose the data were collected from 360 respondents taken from the farmers of the three selected approaches by selecting an equal sample of 120 respondents each, from 10 randomly selected villages of tehsil Chak Jhumra of Faisalabad district in which the three approaches are simultaneously in operation. A comparison of the three selected approaches was made against the selected parameters like sustainability, farmers‟ participation, women participation, linkages development, knowledge gain, technology utilization, diversification, competence of extension field staff (EFS), effectiveness of extension messages, effective use of extension methods, responsiveness to various categories of rural people, organization of target groups, responsiveness to national policies and goals and overall perception of the farmers regarding these approaches. The collected data were analysed by using frequency distributions, weighted scores, analysis of variance, standard variation and LSD values. The Chi-square was also used for computing relationship between the socio-economic characteristics of therespondents and some dependent variables like farmers‟ participation, knowledge gain and technology utilization. The results indicated that PSEA was a better approach than PEA and CSEA with regard to the introduction of sustainable agricultural practices among the farmers. PEA had provided more opportunities to the farmers for their participation in extension programme development than the PSEA and CSEA. PSEA and CSEA had absolutely provided no opportunity for women participation at any stage of extension programme development whereas the women were given opportunities for their participation in PEA. PSEA had developed more linkages with various categories of farmers and agricultural allied agencies than those of PEA and CSEA. PEA was the approach that had covered all the diversified areas whereas rest of the two approaches were not putting sufficient efforts in providing coverage. PEA was a better approach than the other two approaches (PSEA and CSEA). PSEA was ranked at the top with regard to the knowledge gain regarding crop production and protection practices by the farmers, whereas PEA and CSEA were rated as 2 nd and 3 rd respectively. As regards the technology utilization by the farmers PSEA, PEA and CSEA were rated 1 st , 2 nd and 3 rd respectively. PSEA got the highest score among the selected approaches with regard to competence of extension field staff. The extension messages were well prepared in PSEA than those of PEA and CSEA. PEA was responsive to more categories of rural people as compared to the other two approaches (PSEA and CSEA). The EFS of PSEA used the extension methods more effectively than those of PEA and CSEA. The EFS of PEA was more serious in organizing the target groups among the rural communities than the other two approaches (PSEA and CSEA). According to the overall perceptions of the farmers, the PEA was a better approach followed by the PSEA and CSEA.