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where 𝒂 ~ i only selects pixels with large weights by thresholding the estimated 𝒂 ^ i with max ( 𝒂 ^ i ) / 2 (this reduces the contributions from smaller neighboring neurons). This strategy improves the extraction of individual neurons’ traces in the high correlation scenarios and the spatial footprints can be corrected in the following step of updating A ^ . Clearance Sale Cheap Sale Prices 2017 spring design full leather fashion bowling shoes 8NEgJxUBZU
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illustrate this procedure.

CNMF-E may initialize components with shared temporal traces because they have highly overlapping areas. We solve this problem by de-correlating their traces (following a similar approach in [ Offer China manufacturer casual shake women casual shoe Sale New IKxGRSA
]). We start by assuming that neurons with high spatial overlap do not fire spikes within the same frame. If so, only the inferred spiking trace with the largest value is kept and the rest will be set to 0. Then we initialize each given these thresholded spiking traces and the corresponding AR coefficients.

We use iterative matrix updates to estimate model variables in CNMF-E. This strategy gives us the flexibility of integrating prior information on neuron morphology and temporal activity during the model fitting. The resulting interventions (which can in principle be performed either automatically or under manual control) can in turn lead to faster convergence and more accurate source extraction. We integrate 5 interventions in our CNMF-E implementation. Following these interventions, we usually run one more iteration of matrix updates.

When a single neuron is split mistakenly into multiple components, a merge step is necessary to rejoin these components. If we can find all split components, we can superimpose all their spatiotemporal activities and run rank-1 NMF to obtain the spatial and temporal activity of the merged neuron. We automatically merge components for which the spatial and temporal components are correlated above certain thresholds. Our code also provides methods to manually specify neurons to be merged based on human judgment.

When highly correlated neurons are mistakenly merged into one component, we need to use spatial information to split into multiple components according to neurons’ morphology. Our current implementation of component splitting requires users to manually draw ROIs for splitting the spatial footprint of the extracted component. Automatic methods for ROI segmentation ( ENMAYER Crystal Charms White Shoes Woman Supper High Heels Outlet For Nice j9u1YBH
; Pachitariu et al., 2013 ) could be added as an alternative in future implementations.

Some extracted components have spatial shapes that do not correspond to real neurons or temporal traces that do not correspond to neural activity. These components might explain some neural signals or background activity mistakenly. Our source extraction can benefit from the removal of these false positives. This can be done by manually examining all extracted components, or in principle automatically by training a classifier for detecting real neurons. The current implementation relies on visual inspection to exclude false positives. We also rank neurons based on their SNRs and set a cutoff to discard all extracted components that fail to meet this cutoff. As with the splitting step, removing false positives could also potentially use automated ROI detection algorithms in the future. See Discount 2018 New FUNMARST Casual Shoes Spring Breathable Canvas Shoes Shopping Online Original Finishline For Sale Pictures Sale Online Discount Choice 2gwCdu
for an example involving manual merge and delete operations.

If all neural signals and background are accurately estimated, the residual of the CNMF-E model should be relatively spatially and temporally uncorrelated. However, the initialization might miss some neurons due to large background fluctuations and/or high neuron density. After we estimate the background and extract a majority of the neurons, those missed neurons have prominent fluorescent signals left in the residual. To select these undetected neurons from the residual , we use the same algorithm as for initializing neurons from the raw video data, but typically now the task is easier because the background has been removed.

Each single neuron has localized spatial shapes and including this prior into the model fitting of CNMF-E, as suggested in ( Pnevmatikakis et al., 2016 ), leads to better extraction of spatial footprints. In the model fitting step, we constrain to be sparse and spatially localized. These constraints do give us compact neuron shapes in most cases, but in some cases there are still some visually abnormal components detected. We include a heuristic automated post-processing step after each iteration of updating spatial shapes (P-S). For each extracted neuron , we first convert it to a 2D image and perform morphological opening to remove isolated pixels resulting from noise ( Haralick et al., 1987 ). Next we label all connected components in the image and create a mask to select the largest component. All pixels outside of the mask in are set to be. This post-processing induces compact neuron shapes by removing extra pixels and helps avoid mistakenly explaining the fluorescence signals of the other neurons.

The simplest pipeline for running CNMF-E includes the following steps:

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» Table of Contents » Community Assessment » Chapter 3. Assessing Community Needs and Resources » Section 8. Identifying Community Assets and Resources » Main Section
Chapter 3
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Many community organizationsfocus on the needs or deficits of the community. Every community has needs and deficits that ought to be attended to.

But it is also possible to focus on assets and strengths -- emphasizing what the community does have, not what it doesn't. Those assets and strengths can be used to meet those same community needs; they can improve community life.

To draw upona community's assets, we first have to find out what they are. So in this section, we will focus on identifying community assets and resources. We'll also show how they can be harnessed to meet community needs and to strengthen the community as a whole.

What is a community asset?

Our definition is broad. A community asset (or community resource, a very similar term) is anything that can be used to improve the quality of community life. And this means:

Why should you identify community assets?

Who should identify community assets?

Community members of all stripes and from all sectors should be involved in identifying assets. One reason here is the commitment to participatory process that you'll find in most Community Tool Box sections. An even more important one, however, is that community members from a broad range of groups and populations are far more likely to identify assets that may not be apparent to everyone. The community's perception of what constitutes an asset or a resource is at least as legitimate as the "standard" list of institutions and people with specific skills.

A number of garbage-strewn, overgrown empty lots in a neighborhood can be seen as an eyesore and a neighborhood shame. But those lots can also be seen as open space that can be turned into playgrounds, pocket parks, and farmers' markets with volunteer labor that in itself provides a neighborhood community-building opportunity. Community perception is crucial, because seeing something as an asset can make it possible to use it as one.

When should we identify community assets?

Every day. But here are some situations when it's especially desirable to do so:

How do you identify community assets?

The techniques for identifying community assets aren't very hard. You don't need a lot of special training or expertise to do the job well.

Before you begin, though, you do need to answer some important questions. You can do this yourself, in the privacy of your own home. But we recommend strongly do so before you start. Here they are:

What is the size of the community you're concerned with?

An entire county? Town? Neighborhood? Housing development?

The bigger the community, the more work is involved - and you might need and probably different study methods for a large community than for a small one.

What people are available to do the work?

An individual? A small group of people? A larger organization? If you're starting out alone, it makes sense to reach out to others, get them excited about the project, and recruit them to work with you. (Unless your community is very small, identifying all or most of its assets is a big job for one person).

How much time do you have for the task or how much time can you allow?

Tonight? A week? A month? As much time as it takes?

The more time you have, the more assets you will be able to uncover.

What financial resources, if any, can you count on to support the work?

If available, resources for copying or printing and to support human resources (time) can be helpful.

What do you want to do with the results?

Will they be posted in an online directory? Contacted about an opportunity to take action? If so, what action, and how?

What comes next?

There are different approaches to identifying community assets. Each can be valid and useful. Which approach is right for you? The answer will depend in large part on your answers to the starting questions above. So, once again, answer them before you start.

But below are two basic approaches you could use in your own community. They complement each other. One of them focuses on the assets of groups -- specifically, associations, organizations, and institutions. The other focuses on individual people.

Identifying the assets of groups

The central task here is to take an inventory of all the groups (associations, organizations, and institutions) that exist in your community. You want to make a list. But how do you figure out what goes on the list in the first place? Some suggestions follow:

Start the list with what you know. Write down anything that comes to mind. You can always correct your list later.

You can do this work by yourself; but it might be more useful and fun to work with others. Are there other people who could join you and make this a group project?

This is a great project for students or interns.

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.

These can include:

Refine and revise your list.

You can also break your list down in several different ways: alphabetically, geographically, by function, etc.

You now have an inventory of groups and group assets in your community -- the associations, organizations, and institutions that are a fundamental part of community life and that can be used for community improvement. That's an important step.

But what do you do now?

Identifying the assets of individuals

Compiling a list of key groups is one approach for identifying community assets. Another approach is to compile the assets of individuals. This can be challenging, because:

For both these reasons, identifying individual assets often takes place over a smaller community area such as a neighborhood.

But many of the above suggestions still apply. Here's how identifying individual community assets could be done in practice:

Answer the 5 "starting questions" previously given.

This step is the same asfor studying the assets of groups.

Decide on the geographic area you want to cover.

Do you want to focus on a specific neighborhood or community? Or do you want a broad sampling of the community? Keep in mind the time and resources you have available as you make your decision.

Decide on how many people you are going to ask within that area.

Everyone? A certain fixed percentage? As many as you can find? Resolve this question in advance.

Draft some questions you want to ask that will get you the information you need.

Are you interested in skills, ("I can play the piano"), or interests ("I'd love to learn")?

If it is skills, what kind of skills -- academic, artistic, athletic, interpersonal, manual, office, organizing, parenting, vocational...? Human beings have many talents, and you probably want to narrow down your search, at least a little.

If interests, what kind as well? These too come in many and varied types.

Keep in mind:

Design a method by which these questions can be asked .

Each method has its pros and cons.

Try out your questions on a sample group.

Based on their answers and their suggestions, you will probably want to make revisions. That's a good idea, and a natural part of the process. Professional surveyors do the same thing, many times over.

Collect your data.

You've now got a territory to cover, some good questions that meet your needs, and a method for getting the answers. Good work. Now it's time to put your plan into practice andcollect your data.

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Once you have collected asset information, it's often especially helpful to put it on a map. Maps are good visual aids: seeing the data right in front of you often increases your insight and understanding. There are several ways to go about this:

One mapping method is to find a large street map of your community, with few other markings. (Your local Planning Department may help here, or you can probably print one out from Google Maps or some other similar site.) Then just mark with a dot, tag, or push-pin (maybe color-coded by type) the geographic location of the groups and organizations you have found. The patterns that emerge may surprise you. You may see, for example, that certain locations have different numbers or types of associations. Those areas where few associations exist may be good targets for community development later on.

This type of mapping can also be done by computer. Software programs are available to help you do this. These programs are more flexible and sophisticated than paper-and-pushpin mapping, for with them you can create "overlays," visually placing one category of map over another, and changing these visual patterns with the push of a button.

It's also possible to diagram your resources on a non-literal map, but one which can more clearly show the linkages among different categories of assets.

Using the community assets you have identified

Whether or not you map your assets, the next and most important step is to make sure the assets you have identified get used. There is value just in expanding your own personal awareness of what exists in your community, but by sharing your results, you can also expand the awareness of others.

The real value and payoff of identifying assets is in . You want to put your assets to work for you. If you have personal assets, such as savings, you probably don't want to hide them under a mattress. The same applies to the assets in your community. How can we maximize their return?

We'll itemize just a few possibilities below. Think about which might fit best for you, and what your own next steps might be:

Community assets should be reviewed on a regular basis. Asset identification should be a regular part of community life, so that community assets can be taken advantage of when they're needed.

One student of communities, John McKnight, has noted: "Every single person has capacities, abilities and gifts. Living a good life depends on whether those capacities can be used, abilities expressed and gifts given."

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Special Article
Standard operating procedures for describing and performing metabolic tests of glucose homeostasis in mice
Julio E. Ayala , Varman T. Samuel , Gregory J. Morton , Silvana Obici , Colleen M. Croniger , Gerald I. Shulman , David H. Wasserman , Owen P. McGuinness
Disease Models Mechanisms 2010 3: 525-534; doi:10.1242/dmm.006239
Julio E. Ayala
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The Mouse Metabolic Phenotyping Center (MMPC) Consortium was established to address the need to characterize the growing number of mouse models of metabolic diseases, particularly diabetes and obesity. A goal of the MMPC Consortium is to propose standard methods for assessing metabolic phenotypes in mice. In this article, we discuss issues pertaining to the design and performance of various tests of glucose metabolism. We also propose guidelines for the description of methods, presentation of data and interpretation of results. The recommendations presented in this article are based on the experience of the MMPC Consortium and other investigators.

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The miniaturization of metabolic techniques for use in the mouse has resulted in important advances in our understanding of the pathophysiology of diabetes and its associated complications. An important goal of the Mouse Metabolic Phenotyping Center (MMPC) Consortium ( http://www.mmpc.org/shared/missionStatement.aspx ) is to propose standard methodologies for these key metabolic techniques. To this end, guidelines must be established for performing tests of glucose metabolism. It is recognized that it will not be possible for all metabolic tests to be performed in the exact same manner across different laboratories, as the degree of technical expertise and the availability of equipment and reagents will never be consistent from one laboratory to another. However, certain parameters can be standardized, regardless of where tests are conducted. Guidelines must also be established for the description of methods and presentation of results from metabolic tests. This will provide authors and reviewers the necessary information for interpreting results that might differ as a result of differences in methodology. In this article, we discuss issues pertaining to the standardization of methods for assessing glucose metabolism in mice. These include basic considerations when designing and interpreting experiments, as well as consensus recommendations on choosing the appropriate test, performing the test(s), and describing methods and results.

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Fig. S6). Together, these results suggest that Osa and Snr1 might regulate ISC self-renewal and differentiation into both EC and EE cells.

The undetectable level of Dl expression, as judged by antibody staining, encouraged us to further examine the expression of Dl using Dl - lacZ , an enhancer trap at the Dl locus ( Buy Cheap Shop Offer Cheap Pre Order GLM030 Fashion Loafer Genuine Leather Ladies Casual Shoes For Nice Cheap Sast o5svhM
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Fig. 4.

Osa regulates expression at the transcriptional level in ISCs. ( A-B ′) The transcriptional reporter is highly expressed in ISCs in the wild-type midgut (arrows in A,A′). No, or very weak, expression of was detected in ISCs that express (arrows in B,B′). The wild-type control and were driven by and stained with the antibodies indicated. ( C ) Analysis of the fluorescence intensity of in wild-type ISCs and ISC-like cells in the midgut indicates that the latter have significantly less expression. ( D ) Quantification of mRNA in wild-type and midguts by qPCR. Compared with wild-type, midguts have significantly lower mRNA levels. Data are mean ± s.e.m. Scale bars: 10 μm.

Expression of the Dl receptor N was unaffected, as N expression can be detected in the osa RNAi midguts as well as in the wild type ( ELVISWORDS Poodle Womens Casual Canvas Shoes Cute Pet Dog Discount Explore lh0PxUj
Fig. S4C-D′). These data suggest that Osa might specifically regulate Dl expression at the transcriptional level to control ISC self-renewal and differentiation of ISCs into ECs.

When an activated form of N is expressed in the posterior midgut ( esg ts > N Δ34a ), all ISCs differentiate into ECs (compare Hot selling leather products men casual shoe Free Shipping With Paypal Authentic Cheap Price h67qUu3sQQ
Fig. S7B with S7A). In the osa RNAi midgut ( esg ts > osa RNAi ; supplementary material Fig. S7C), excess ISC-like cells were found at the expense of differentiated EC and EE cells. To determine the epistatic relationship between Osa and the N signaling pathway, we expressed the constitutively activate form of N ( N Δ34a ) in the osa RNAi midgut ( esg ts > osa RNAi + N Δ34a ; supplementary material Fig. S7D). After shifting the adult flies to the restrictive temperature (29°C) for 7 days, all ISCs had differentiated into ECs. These results support the idea that Osa functions upstream of N in regulating EC fate.

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