Methane Emission Estimation from Landfills in Korea (1978–2004): Quantitative Assessment of a New Approach

Hybrid ultrasound imaging systems, which combine spherical focusing on transmit with axicon focusing on receive, provide excellent resolution over a useful depth of field. This paper presents a new hybrid design with improved sensitivity, in which the axicon focusing is achieved by two conical mirrors and a PZT 5A disk cut into 8 sectors. We have investigated two methods of processing the signals from the 8 sectors. In the first, phase insensitive sector addition (PISA), the B-scan is formed from the sum of the 8 demodulated signals. In the second, multiplicative processing (MP), the 8 rf waveforms are multiplied and the resultant is demodulated to form the image. Both techniques result in smoothed speckle but degraded lateral resolution. As well, MP decreases the off-axis sensitivity of the system and artifacts characteristic of axicon focusing. Quantitative assessment of the effects of PISA and MP was performed using a new approach called contrast-to-speckle ratio (CSR). The CSR data, which is a measure of the image contrast of cylindrical voids in a random scattering medium relative to contrast fluctuations due to speckle, shows the superiority of PISA and MP. This conclusion is supported by images of in vitro human breast tissue.

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New approach of simultaneous, multi-perspective imaging for quantitative assessment of the compactness of grape bunches

Australian Journal of Grape and Wine Research ◽

10.1111/ajgw.12349 ◽

2018 ◽

Vol 24 (4) ◽

pp. 413-420 ◽

Cited By ~ 3

Author(s):

X. Chen ◽

H. Ding ◽

L.-M. Yuan ◽

J.-R. Cai ◽

X. Chen ◽

...

Keyword(s):

Quantitative Assessment ◽

New Approach

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Applying guidance for methane emission estimation for landfills

Waste Management ◽

10.1016/j.wasman.2005.11.015 ◽

2006 ◽

Vol 26 (4) ◽

pp. 417-429 ◽

Cited By ~ 104

Author(s):

Heijo Scharff ◽

Joeri Jacobs

Keyword(s):

Methane Emission ◽

Emission Estimation

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Mathematical modelling of positive carbon-climate feedback: permafrost lake methane emission case

Earth System Dynamics Discussions ◽

10.5194/esdd-3-235-2012 ◽

2012 ◽

Vol 3 (1) ◽

pp. 235-257 ◽

Cited By ~ 1

Author(s):

I. A. Sudakov ◽

S. A. Vakulenko

Keyword(s):

Phase Transitions ◽

Methane Emission ◽

Methane Concentration ◽

Climate Models ◽

Focus Of Attention ◽

Climate Feedback ◽

Small Lakes ◽

New Approach ◽

Potential Source ◽

Feedback Coefficient

Abstract. The permafrost methane emission problem is in the focus of attention of different climate models. We present new approach to the permafrost methane emission modeling. The tundra permafrost lakes is potential source of methane emission. Typically, tundra landscape contains a number of small lakes and warming leads to lake extension. We are making use of this process by the nonlinear theory of phase transitions. We find that climate catastrophe possibility depends on a feedback coefficient connecting the methane concentration in atmosphere and temperature, and on the tundra permafrost methane pool.

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Topino: A Graphical Tool for Quantitative Assessment of Molecular Stream Separations

10.26434/chemrxiv.13515086.v1 ◽

2021 ◽

Author(s):

Sven Kochmann ◽

Nikita A. Ivanov ◽

Sergey Krylov

Keyword(s):

Open Source Software ◽

Quantitative Assessment ◽

Separation Zone ◽

Multiple Streams ◽

Command Line Interface ◽

Component Mixture ◽

New Approach ◽

Graphical Tool ◽

Rectangular Chamber ◽

User Friendly

In molecular-stream separation (MSS), a stream of a multi-component mixture is separated into multiple streams of individual components inside a thin rectangular chamber. Despite great potential and many years of work on MSS, its analysis was underdeveloped until recently. To fill in this gap, we introduced a novel and convenient way to assess MSS by convoluting the separation zone into a simple 2D plot called angulagram. We implemented and publicly shared Python programs for the generation of angulagrams. However, we realized that Python programs create two hurdles (setting up a resembling Python environment and using a command line interface) for other researchers to try out and adopt this new approach. To make our approach more accessible to the MSS community, we introduce and present here the open-source software Topino for quantitative assessment of MSS. Topino is a user-friendly, accessible program with a graphical user interface that allows the user to assess MSS data in a fast and straightforward way (less than 2\ min). The software is available at https://github.com/Schallaven/topino.

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Improved integrated metric for quantitative assessment of resilience

Advances in Mechanical Engineering ◽

10.1177/1687814020906065 ◽

2020 ◽

Vol 12 (2) ◽

pp. 168781402090606 ◽

Cited By ~ 1

Author(s):

Congcong Cheng ◽

Guanghan Bai ◽

Yun-An Zhang ◽

Junyong Tao

Keyword(s):

Time Scale ◽

System Performance ◽

Information Exchange ◽

Quantitative Assessment ◽

Experimental Studies ◽

Weight Coefficient ◽

Engineering Systems ◽

New Approach ◽

System Requirements ◽

Exchange Network

Resilience provides a new approach that system administrators can use in the design and analysis of engineering systems to enhance the ability of such systems to withstand uncertain threats. In this article, an improved integrated metric is proposed for the quantitative assessment of resilience. The proposed metric is constructed in the form of a summation of two capacities: absorptive and restorative capacities. A weight coefficient is assigned to each capacity to enhance the flexibility according to various system requirements of stakeholders. In addition, based on the absolute time scale, a new time factor is proposed and incorporated into the resilience metric to quantify the effect of time on system performance. To test the performance of the proposed metric, three experimental studies are conducted wherein the proposed metric is compared with two other metrics reported in the literature. The results indicate that the proposed metric extends the flexibility of the previous metrics to systems where the time scale is addressed, and that the numerical values of resilience lie in a proper range and can be compared conveniently across different engineering systems. Furthermore, an example of an information exchange network is adopted to demonstrate the applicability of the proposed metric.

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A quantitative approach to parasitism

Parasitology ◽

10.1017/s0031182000071420 ◽

1971 ◽

Vol 62 (2) ◽

pp. 179-193 ◽

Cited By ~ 404

Author(s):

H. D. Crofton

Keyword(s):

Negative Binomial Distribution ◽

Quantitative Assessment ◽

Negative Binomial ◽

Truncated Form ◽

Great Pleasure ◽

New Approach ◽

Frequency Distributions ◽

Ecological Relationship ◽

Definition Of ◽

Host Parasite

The frequency distribution of parasites among hosts is used as the basis of the quantitative assessment of the nature of parasitism. The host–parasite system is regarded as an ecological relationship between populations of two different species of organisms. From the overdispersed frequency distributions exemplified by the Negative Binomial distribution a specially truncated form is derived and shown to fit the data of Hynes & Nicholas (1963). The theoretical consequences are discussed and these form the basis of a definition of parasitism.I am indebted to Professor H. B. N. Hynes who so readily understood my general aims and freely provided detailed information about his work. I also have great pleasure in thanking Professor John H. Whitlock, not only for the original computing facilities which he so generously provided, but also for his many other kindnesses. I am also very grateful to Dr Charles Henderson Jun. for his work on the original computer program and to Dr Mark Westwood for his ingenuity and labours in producing a new approach to the computations.

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Improving Construct Measurement In Management Research: Comments and a Quantitative Approach for Assessing the Theoretical Content Adequacy of Paper-and-Pencil Survey-Type Instruments

Journal of Management ◽

10.1177/014920639301900208 ◽

1993 ◽

Vol 19 (2) ◽

pp. 385-417 ◽

Cited By ~ 159

Author(s):

Chester A. Schriesheim ◽

Kathleen J. Powers ◽

Terri A. Scandura ◽

Claudia C. Gardiner ◽

Melenie J. Lankau

Keyword(s):

Quantitative Assessment ◽

Quantitative Methods ◽

Initial Step ◽

Management Research ◽

Satisfaction Scale ◽

New Approach ◽

Instrument Validity ◽

Construct Measurement ◽

New Applications ◽

Measurement Practices

A cursory review of the measurement practices found in four diverse management journals is briefly reported, suggesting that the current authors’ concerns about serious measurement deficiencies in at least some subdomains of the field may not be groundless. Then, it is suggested that the demonstration of instrument content adequacy be demanded as an initial step toward construct validation by all studies which use new, modified, or previously unexamined measures. Although adequate content is a necessary pre-condition for instrument validity, there are no well-established quantitative methods for examining content adequacy. Consequently, the main focus of this article is to propose a new approach for the quantitative assessment of content adequacy and to illustrate this approach by evaluating a commonly-used job satisfaction scale. Problems in and suggestions for the use of this method a represented, along with implications and potential new applications of the method for management research.

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