Software product lines are gaining importance because they allow improvements in time to market, cost, productivity and quality of software products. Architecture evaluation is one important aspect in the development of product lines for large-scale distributed systems. It is desirable to evaluate and compare architectures for functionality and quality attributes before implementing or changing the whole system. Often, the effort required for the thorough evaluation of alternatives using prototypes is prohibitive. In this paper, we present an approach for cost-efficient software architecture evaluation, based on scenario-oriented software specifications, modeling the system services. We show how to map the same set of services to several possible target architectures and give a procedure to generate evaluation prototypes using aspect-oriented programming techniques. This significantly reduces the effort required to explore architectural alternatives. We explain our approach using the Center TRACON Automation System as an example.

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Background: One of the preventive measures of COVID-19 is to take two dose of COVID-19 vaccine. India now second wave is spreads in community and daily increasing its number in infection and death, our study concentrates on the COVID infection to vaccination completed Health Care worker. Materials and Methods: 195 staff members of secondary medical care centre in rural area are studied, out of which vaccination taken are 182 are included data's are collected by Cross section questionnaire's and data from office these are tabulated and analysed. Results: 82(93.3%) of staffs in secondary centre are taken vaccination against COVID-19.post vaccination COVID infection seen in 6 persons, among 6 one as taken only one dose of vaccine, symptoms are milder and only one requires hospital admission. Conclusions: Milder symptoms are seen in post vaccinated staff, vaccine as to cover larger population to control pandemic infection, study as to do in infectivity of post vaccinated infected people.

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A field experiment was conducted during kharif 2011 to evaluate the economic feasibility of different planting methods viz., mechanized transplanting (22x14 cm), manual transplanting (20x10 cm), manual transplanting with wider spacing (25x10 cm) and power weeding, drum seeding (20x10 cm) and broadcasting for enhancing the productivity and profitability of rice cultivation. The experiment, replicated four times was laid out in randomized block design in plots of 60 m 2 size. Results indicated that plant height, tillers m -2 , panicles m -2 and grains per panicle were higher in mechanized transplanting compared to all other treatments. Mechanized transplanting recorded the highest grain yield (7418 kg ha-1 ) as well as gross returns (Rs 96434 ha -1 ) and net returns (Rs 72348 ha -1 ) with a benefit cost ratio of 3.0, while broad casting method registered the lowest grain yield (5308 kg ha -1 ), gross returns (Rs 68998 ha -1 ) and net returns (Rs 40693 ha -1 ). Drum seeding recorded benefit cost ratio of 2.7 with higher grain yield compared to manual planting.