scholarly journals Effectiveness of Natural Coagulant in Coagulation Process: A Review

2018 ◽  
Vol 7 (3.9) ◽  
pp. 34 ◽  
Author(s):  
Amir Hariz Amran ◽  
Nur Syamimi Zaidi ◽  
Khalida Muda ◽  
Liew Wai Loan
Keyword(s):  
Research And Development ◽  
Plant Species ◽  
Research Gaps ◽  
Natural Coagulant ◽  
Charge Neutralization ◽  
Polymer Bridging ◽  
Advantages And Disadvantages ◽  
The Past ◽  
Natural Coagulants ◽  
Plant Components

Natural coagulants have been increasingly popular in the past few years due to its benefits and the fact that it resolves most of the associated problems when using chemical coagulants. Plant-based natural coagulants perform coagulation either by polymer bridging or charge neutralization, it can be extracted from various plant components. Concerted research and development efforts have been conducted in discovering new plant species and constituents that can be used as natural coagulants, which further boosting the effectiveness of existing plant-based natural coagulants.  The objective of this paper is to provide a mini review on studies done over the span of ten years regarding plant-based natural coagulants. This paper also includes advantages and disadvantages of natural coagulants prior to identify several potential research gaps to provide platform towards the need of further study.  

Role of Research and Development in Sustaining Indian Agriculture: A Brief Review

2020 ◽  
pp. 396-401
Keyword(s):  
Research And Development ◽  
Production Process ◽  
Annual Increase ◽  
Agriculture Sector ◽  
The Past ◽  
Indian Agriculture ◽  
Self Sufficiency ◽  
Development Institutions ◽  
Agriculture Development

Technology united with research and development has evolved as a grave differentiator of the agriculture sector in India including production, processing, and agriculture packing and marketing of given crops. Near about 50 percent of the Indian workforce was engaged in the agriculture sector but its share in GDP was only 14 percent, much lower in comparison to former. Though, certain agriculture items showed a steady annual increase in terms of kilograms per hectare. Agriculture transformed significantly over the past few decades but when it comes to investment in research and development there is a lot more which needs to be done. The paper analyzes the role of various research and development institutions in boosting the growth of the agriculture sector that helps in attaining sustainable agriculture development and self-sufficiency in the production process since independence. It also focusesed on the various issues faced by these development institutions. The findings unveiled that since independence a lot more was done to boost the research and development in the agriculture sector at both the center and state levels but a proper implementation of these policies along with transparency could bring more desirable outcomes than were gained at present.

Plant leaf recognition with shallow and deep learning: A comprehensive study

2020 ◽  
Vol 24 (6) ◽  
pp. 1311-1328
Author(s):  
Jozsef Suto
Keyword(s):  
Machine Learning ◽  
Plant Species ◽  
Research Area ◽  
Research Papers ◽  
Plant Leaf ◽  
Leaf Characteristics ◽  
The Past ◽  
The Earth ◽  
Test Sets ◽  
Comprehensive Study

Nowadays there are hundreds of thousands known plant species on the Earth and many are still unknown yet. The process of plant classification can be performed using different ways but the most popular approach is based on plant leaf characteristics. Most types of plants have unique leaf characteristics such as shape, color, and texture. Since machine learning and vision considerably developed in the past decade, automatic plant species (or leaf) recognition has become possible. Recently, the automated leaf classification is a standalone research area inside machine learning and several shallow and deep methods were proposed to recognize leaf types. From 2007 to present days several research papers have been published in this topic. In older studies the classifier was a shallow method while in current works many researchers applied deep networks for classification. During the overview of plant leaf classification literature, we found an interesting deficiency (lack of hyper-parameter search) and a key difference between studies (different test sets). This work gives an overall review about the efficiency of shallow and deep methods under different test conditions. It can be a basis to further research.

Aspects of the geomorphology, genesis and environmental significance of earth hummocks (thúfur, pounus): miniature cryogenic mounds

2005 ◽  
Vol 29 (2) ◽  
pp. 139-155 ◽  
Author(s):  
Stefan Grab
Keyword(s):  
Current Knowledge ◽  
Thermal Characteristics ◽  
Environmental Research ◽  
Environmental Significance ◽  
Research Gaps ◽  
Frozen Ground ◽  
The Past ◽  
Internal Morphology ◽  
Differential Frost Heave ◽  
Made In

Miniature varieties of cryogenic mounds that are capable of forming in seasonally frozen ground are commonly referred to as earth hummocks (e.g., North America), thúfur (e.g., Greenland and Iceland) and pounus (Fennoscandia). Over the past few decades there has been a consistent interest to study earth hummocks from a variety of environmental settings. This review summarizes the current knowledge of earth hummocks, highlighting aspects on the external and internal morphology, and thermal characteristics, which may assist to explain hummock formation. Several hypotheses have been proposed for the genesis of earth hummocks, including the ‘cryoexpulsion’ of clasts, hydrostatic and cryostatic pressure, cellular circulation, and differential frost heave. These hypotheses are critically evaluated and some research gaps identified. It emerges that considerable advances have been made towards an improved understanding of earth hummock development, modification and disintegration. Much progress has been made in the application of earth hummock studies to a variety of environmental research approaches such as palaeoenvironmental reconstructions and assessing their impact on hillslope drainage.

Pharmaceutical Innovation in the United States: Factors Affecting Future Performance

1993 ◽  
Vol 9 (2) ◽  
pp. 167-173 ◽  
Author(s):  
Michael R. Pollard
Keyword(s):  
United States ◽  
Pharmaceutical Industry ◽  
Research And Development ◽  
Cost Containment ◽  
The United States ◽  
Private Companies ◽  
Factors Affecting ◽  
The Past ◽  
Future Performance ◽  
Regulatory Strategy

AbstractFueled by high returns on its investments, the pharmaceutical industry in the United States has flourished for the past 50 years. The regulatory strategy of demanding stringent testing then allowing market-based pricing has allowed private companies to fund ambitious research and development activities with the assurance that these investments will be recovered. However, aggressive managed-care cost-containment strategies threaten the companies' ability to recoup research and development expenses and may affect their willingness to invest in future innovative research.

The State of the Art in Management Education Applicable to Aerospace Activities

1967 ◽  
Vol 71 (677) ◽  
pp. 342-343
Author(s):  
F. H. East
Keyword(s):  
Research And Development ◽  
Management Education ◽  
State Of The Art ◽  
Development Project ◽  
The State ◽  
The Other ◽  
The Past ◽  
Defence Budget ◽  
The One ◽  
Almost All

The Aviation Group of the Ministry of Technology (formerly the Ministry of Aviation) is responsible for spending a large part of the country's defence budget, both in research and development on the one hand and production or procurement on the other. In addition, it has responsibilities in many non-defence fields, mainly, but not exclusively, in aerospace.Few developments have been carried out entirely within the Ministry's own Establishments; almost all have required continuous co-operation between the Ministry and Industry. In the past the methods of management and collaboration and the relative responsibilities of the Ministry and Industry have varied with time, with the type of equipment to be developed, with the size of the development project and so on. But over the past ten years there has been a growing awareness of the need to put some system into the complex business of translating a requirement into a specification and a specification into a product within reasonable bounds of time and cost.

A Comprehensive Literature Review on Construction Project Risk Analysis

2016 ◽  
Vol 5 (4) ◽  
pp. 1-15 ◽  
Author(s):  
Ermias Tesfaye ◽  
Eshetie Berhan ◽  
Daniel Kitaw
Keyword(s):  
Risk Assessment ◽  
Meta Analysis ◽  
Construction Project ◽  
Assessment Tools ◽  
Research Gaps ◽  
The Past ◽  
Comprehensive Literature Review ◽  
Risk Assessment Tools ◽  
Assessment Techniques ◽  
Project Risk Analysis

The purpose of this paper is to present the chronological development of risk assessment techniques and models undertaken in construction project for the past two decades. This research used a systematic review and meta-analysis on risk assessment of construction project literatures. This includes browsing relevant researches and publications, screening articles based on the year of publication, identifying the domains and attributes. Accordingly, findings of major results achieved have been presented systematically based on the chronology of the research and research gaps are identified. From the review, it is found out that the dominant risk assessment tools used for the past twenty years is statistical analysis and fuzzy expert system.

scholarly journals Karakterisasi Ekstrak Tapioka dan Tapioka Ionik sebagai Biokoagulan dalam Proses Pengolahan Air

2018 ◽  
Vol 19 (2) ◽  
pp. 165
Author(s):  
Eka Prihatinningtyas ◽  
Agus Jatnika Effendi
Keyword(s):  
Ion Exchange ◽  
Isoelectric Point ◽  
Ftir Analysis ◽  
Active Components ◽  
Turbidity Removal ◽  
Natural Coagulant ◽  
Coagulation Process ◽  
Or Groups ◽  
Natural Coagulants ◽  
Artificial Water

ABSTRACTThe ability of tapioca to act as natural coagulants (biocoagulants) was tested using artificial water. As turbidity was added as kaolin. This research aimed to determine the compounds and or groups that act as natural coagulant and to describe the mechanism of flocculation: extraction which yields tapioca extract and ion exchange which yields ionic tapioca. Coagulation process was performed at three different initial turbidities, i.e. 50 NTU (low turbidities), 150 NTU (middle turbidities) and 300 NTU (high initial turbidites). At the same condition (coagulant dose 20 ppmv, pH 5), ionic tapioca yield better turbidity removal compared tapioca extract i.e 11.2% at low initial turbidites; 2.4% at middle initial turbidities and 12.8% at high initial turbidities. FTIR analysis  showed that tapioca extract and ionic tapioca contained of carboxyl, hydroxyl and amides groups which  can act as active components on coagulation process. The presence of those groups caused positive and negative charges (amphoter). Coagulation process ran efficiently at pH 5 because the isoelectric point is obtained at that condition.Keyword : bio coagulants, coagulation,  coagulant agents, ionic tapioca, tapioca extract,ABSTRAK Kemampuan tepung tapioka sebagai koagulan alami (biokoagulan) telah diuji dengan menggunakan limbah artifisial dari kaolin. Penelitian ini bertujuan untuk menentukan senyawa atau gugus yang berperan sebagai biokoagulan dan menjelaskan mekanisme flokulasi yang terjadi. Perlakuan awal tapioca sebelum digunakan sebagai koagulan adalah ekstraksi yang menghasilkan ekstrak tapioka  dan pertukaran ion  yang menghasilkan tapioka ionik. Proses koagulasi dilakukan pada 3 macam kekeruhan awal yaitu 50 NTU (kekeruhan rendah), 150 NTU (kekeruhan sedang) dan 300 NTU (kekeruhan tinggi). Pada kondisi operasi yang sama (dosis 20 ppmv dan pH 5), tapioka ionik memberikan efisiensi penurunan kekeruhan yang lebih tinggi, yaitu sebesar 11,0% pada kekeruhan awal 50 NTU; 2,4% pada kekeruhan awal 150 NTU dan 12,8% pada kekeruhan awal 300 NTU. Hasil analisa FTIR menunjukkan bahwa ekstrak tapioka dan tapioka ionik mempunyai gugus karboksil (-OH), gugus karboksil (-COOH) dan gugus amida (-CONH2). Keberadaan ketiga gugus tersebut menyebabkan biokoagulan ini memiliki muatan positif dan negatif sekaligus (amfoter). Proses koagulasi berjalan dengan efisien pada pH 5 karena titik isoelektrik diperoleh pada pH tersebut. Kata kunci : biokoagulan, koagulasi, agen koagulan, ekstrak tapioka, tapioka ionik

scholarly journals Modern concepts of conversion and storage of energy by dispersed materials absorption

2002 ◽  
Vol 34 (3) ◽  
pp. 247-259
Author(s):  
Dragica Minic-Popovic ◽  
M.V. Susic
Keyword(s):  
Research And Development ◽  
Metal Hydride ◽  
Development Stage ◽  
Ease Of Use ◽  
Glass Microsphere ◽  
Carbon Clusters ◽  
Storage Method ◽  
Advantages And Disadvantages ◽  
Storage Methods ◽  
And Storage

Once hydrogen is generated, the question asked: How do we store hydrogen? Hydrogen can be stored in a variety of ways, each with specific advantages and disadvantages. The overall criteria for choosing a storage method should be safety and ease of use. Described in this paper and listed below are different storage methods available today (compressed hydrogen, liquid carrier storage, glass microsphere, chemically stored hydrogen) in addition to some techniques that are still in the research and development stage: power balls, metal hydride tanks and carbon clusters.

scholarly journals Laser therapy of chronic inflammatory diseases of the uterine appendages

2004 ◽  
Vol 53 (4) ◽  
pp. 76-81
Author(s):  
E. F. Condrina ◽  
G. N. Ponomarenko
Keyword(s):  
Laser Therapy ◽  
Inflammatory Diseases ◽  
Scientific Publications ◽  
Chronic Inflammatory Diseases ◽  
Advantages And Disadvantages ◽  
Low Intensity ◽  
The Past ◽  
Low Intensity Laser Therapy ◽  
Different Characteristics ◽  
Intensity Laser

This article provides an overview of scientific publications by domestic and foreign authors over the past 10 years, devoted to the problem of using low-intensity laser therapy in the treatment of chronic inflammatory diseases of the uterine appendages; the analysis of indications and contraindications, advantages and disadvantages of using laser radiation with different characteristics in the treatment of chronic salpingo-oophoritis was carried out; the most significant aspects of the influence of laser therapy on the main pathogenetic mechanisms of the development of the inflammatory process of the uterine appendages are highlighted.

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