Volume 8 | Issue 9 |

 Abstract

Water pollution and the growing share of wastewater released into water bodies increased stress on water environment.. Proper environmental-friendly and sustainable techniques are important for treatment of these water resources. Phytoremediation in water deals with the application of aquatic plants for the remediation of pollutants in water resources or aquatic ecosystems. In this work, efforts were made to remove pollution load of municipal wastewater by using free-floating macrophytes like Spirodela polyrhiza and Lemna minor. Both were reported as very successful duckweeds for the phytoremediation and their low cost, long storage capacity, minimal chemical and biological sludge volume. Also, their ease of transport, ability to grow under different climatic conditions and fast reproduction rates are additional advantages. The interesting results obtained were percentage reduction in COD (82.2% and 68.8%), BOD (84.3% and 63.8%), phosphate (63.8% and 59.02%,), ammonia nitrogen (75.4% and 55.9%) and nitrate (79.1% and 55.4%) for Lemna minor and Spirodela polyrizha respectively. The maximum growth of duckweeds was during the experimental period in the pH range 7-8. The study showed that this treatment can be successfully carried out on a large scale by using Lemna minor as the phytoremediation agent for about 17days as an effective, low-cost tertiary treatment for heavy loaded municipal wastewater. Also, it could be given as a stand-alone treatment with preliminary facilities, in small villages.

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Phytoremediation, duckweeds, Spirodela polyrhiza, Lemna minor, Biological treatment, Nutrient removal

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In this paper, an innovative control technique for wind power generation for smoothening the stator active or reactive power swell components under unbalanced grid voltage using doubly-fed induction generators (DFIG) is projected. The negative order component of the rotor current is used to diminish the active and reactive power waves, which is extracted by band pass filters. It is revealed that reducing the reactive power ripples can lead to results in the torque ripple reduction. Simulation results shows that the proposed control algorithm can reduce the active or reactive power ripple components as well as reduceing the torque and speed ripples.

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Wind energy conversion, unbalanced gird voltage, DFIG, power control

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Lattice Dynamics the concept of a phonon and its properties were first introduced by Debye in 1912. A phonon is defined as a quantum of vibrational energy within a crystal structure. Phonons are considered as a quasi-particle with wave vector q and angular frequency ? s for atomic vibrational polarization s. The energy of a phonon mode is h?s and its momentum is h q. Lattice dynamics is the study of the relationship between these two quantities: ? = ?s(q). In the present study an experimental cum mathematical modeling was performed to study how phonon dispersion curves arise. The continuum model has been employed to explain the phonon dispersion of semiconducting nanostructures. The result shows that for the silicon nanostructures, the ultra-small case of each structure that all branches except the acoustic are flat and dispersion less regardless of whether the system is zero-, one-or two-dimensional. Conversely, the continuum model of the nanotube shows that the group velocity of the low optical modes is much large for k > 1. As the size of the silicon structures increases, these branches are seen to become dispersive in the direction of propagation like the nanotube.

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Lattice dynamics; quantum; structure; model; nanotube.

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 Abstract

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????????, ???????, ??????, ???????????

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Construction project's success depends on how well it performs. There are many factors affecting construction performance resulting in construction delay or construction failure. The purpose of the study is to determine the factors influencing construction project efficiency, and to generate perceptions of their relative importance. The questionnaires have been distributed to main project participants. A systematic analysis of the literature has been implemented to produce a collection of variables that are thought to influence project performance. The findings of the survey show that the most significant factors influencing the success of a project are: escalation in material cost, quality and shortage of materials, safety training, technical capability of site engineer, positive attitude of project participants, climatic conditions and suggestions are made for addressing all of those factors.

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Analysis, survey, performance

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Thousands of years before the introduction and the development of Modern Management Theories, Indian scriptures have discussed about the concept of good leadership that the present day researchers are talking about. Good leadership is the key to good governance and welfare of the nation and organizations. It is the virtues and values of the leaders, that shapes our society and organizations and therefore good leadership can only restructure our life. The Devi Mahatmya teaches the concept of good leadership through stories of fight between the Devi and the Demons, the good against the bad forces in a symbolic battlefield. Sri Swami Krishnananda explains that all the demons in the Devi Mahatmya are the indwelling bad forces like kama (lust), krodha (anger), lobha (greed), mada (pride), moha (attachment), and matsarya (jealousy)affecting our body, mind and soul. Devi kills these demons in us. Killing or controlling these forces can only one become a good leader. This paper uses hermeneutics a qualitative research methodology, which is the interpretation of an ancient or a classical literature. The paper explains the exotic meaning of Devi Mahatmya in the light of good leadership.

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Good leadership; Symbolic Battlefield; Devi Mahatmya.

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This research work numerically analyze the elliptical CFB boiler tube model using Ansys 15.0. The detailed analysis has been done for performance parameters such as temperature distribution, heat transfer coefficient on elliptical CFB boiler tube models. The result has been compared with the reference paper reported in the literature. This paper also shows the comparison of elliptical CFB boiler tube with fin configured CFB model at constant temperature.

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Ansys, Boiler, governing equation, boundary condition

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Mankind�s instinctual yearning to beautify habitats has been with us for as long as they want to have shelter. This creative practice was since primeval times giving meaning to build spaces. The folk art and craft � art that develops its styles, techniques, and subject matters within the culture and history of a country & its people. This paper discusses the potential of application of the folk art and craft work of Punjab i.e. Phulkari in design. It begins with summarizing the fundamental techniques used and application they had so far in the field of art. The main objective is to analyze incorporation of phulkari work in the interior spaces and improve the performance of it in line with the humanitarian needs of the user. As phulkari is cultural craft it can lay vital foundation in art and architecture that can take up in developing inherently pleasing, elegant and lasting design. This is achieved by making sandwiched panels with phulkari cloths where the recycled paper is used to make threads of desired colors. Utilization of such art in interiors broadens the horizon of the artist and art itself, as this craft is practiced by young girls and women in villages of Punjab, this increase the scope of their employment and helps in empowering women to be entrepreneur with the skills they have been practicing since ages. As for the interiors every wall can be baag � �a garden� which is the gist of phulkari

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folk art and craft, phulkari, sandwich panels, paper threads, sustainability, interiors, lasting design

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The present invention was directed to a stethoscope system, which includes a local stethoscope unit with a chest piece assembly to generate a first analog auscultation signal and two inches PVC tubing which also acts as a mechanical low pass filter and prevents external scratching noise of hand during auscultation. A diaphragm of acoustic capacitive transducer is to receive the first analog auscultation signal. The present invention also is directed to a stethoscope system comprising a capacitive microphone unit. One novel feature of the device of the present invention is the use in the stethoscope units of a low frequency boost to improve the low frequency response down to approximately 20 Hz. The switchable bell/diaphragm and extension mode enables to auscultate a desired sound frequency performance bandwidth and for enhanced the bell-diaphragm characteristics of a traditional stethoscope. Another novel feature of invention is that it provides an efficient, low cost, low noise stethoscope system using a low cost low noise op amp. Another feature of the present invention is that it provides conversion of arterial sounds into graphic output via PC based oscilloscope software which leaves less chance of observation error.

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auscultation, acoustic, capacitive, transducer, traditional, stethoscope.

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Information systems are increasingly becoming important facilitators of efficiency in academic and administrative services delivery in universities world-wide as well as in Kenya. To meet the requirements of confidentiality, availability and integrity of the information systems, universities need to ensure physical security of these systems. This study specifically investigated the implementation levels of physical security measures employed by the randomly sampled private and public universities in Kenya. Questionnaires were used to collect data from purposively sampled university staff members, the data was then analyzed, interpreted and presented using both qualitative and quantitative methods. Data was analyzed to yield frequencies which were expressed into percentages for better understanding. Results revealed that while physical security mesures for information facilities are employed by a lot of the universities, most vital aspects like signage implemetation, ICT asset register, and recovery of portable devices is widely not practiced. The paper recommends better implemetation of physical security safeguards for university information systems. Further emanating research areas from the research study are discussed.

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University Information Systems, Physical security measures, operation areas, IT Security.

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