Grand Canyon National Park would like to invite the public to the eighth annual season of "Echoes from the Canyon". This living history event will feature day time and evening programs August 16 –19th. https://www.nps.gov/grca/learn/news/echoes-from-the-canyon.htm

Yesterday, the Ikes Fire grew to approximately 4,297 acres and has 87 resources assigned. Despite gusty winds and dry conditions, the fire spread across the planning area with low to moderate fire behavior. The weather will continue to be drier than normal with no chance of precipitation in the forecast. Light winds are expected out of the southwest at 8-10 mph with gusts up to 18 mph. Smoke from the Ikes Fire, along with other fires in the area, will be visible throughout the surrounding area. https://www.nps.gov/grca/learn/news/ikes-fire-progresses-at-steady-pace-20190818.htm

This new research has outlined yet another benefit to intermittent fasting—that may arise from the time you eat, rather than what you eat.

The post New Intermittent Fasting Program Shown to Suppress Cancer and Metabolic Disease in Mice and Humans appeared first on Good News Network.

Though it’s difficult for food banks to stock this item, nutrient-dense milk is one of the most-often requested items. Now, in these critical times, the Kroger grocery store chain has ramped-up its Dairy Rescue Program, one that takes donated excess raw milk normally sold to restaurants or hotels, which is now going to waste, and […]

The post Kroger Buys and Redirects Dairy Farmers’ Excess Milk, Sending 50,000 Gallons Per Month to Food Banks appeared first on Good News Network.

Principal findings of the National Fire and Fire Surrogate (FFS) study are presented in an annotated bibliography and summarized in tabular form by site, discipline (ecosystem component), treatment type, and major theme. Composed of 12 sites, the FFS is a comprehensive multidisciplinary experiment designed to evaluate the costs and ecological consequences of alternative fuel reduction treatments in seasonally dry forests of the United States. The FFS has a common experimental design across the 12-site network, with each site a fully replicated experiment that compares four treatments: prescribed fi re, mechanical treatments, mechanical + prescribed fire, and an unmanipulated control. We measured treatment cost and variables within several components of the ecosystem, including vegetation, the fuel bed, soils, bark beetles, tree diseases, and wildlife in the same 10-ha experimental units. This design allowed us to assemble a fairly comprehensive picture of ecosystem response to treatment at the site scale, and to compare treatment response across a wide variety of conditions.

Excess nitrogen stemming from human activities is a common water pollutant. Fertilizer runoff, sewage, and fossil fuel emission all contain nitrogen that often ends in streams, rivers, and ultimately the ocean.

WestProPlus is an add-in program developed to work with Microsoft Excel to simulate the growth and management of all-aged Douglas-fir-western hemlock (Pseudotsuga menziesii (Mirb.) Franco-Tsuga heterophylla (Raf.) Sarg.) stands in Oregon and Washington. Its built-in growth model was calibrated from 2,706 permanent plots in the Douglas-fir-western hemlock forest type in Oregon and Washington. Stands are described by the number of trees per acre in each of nineteen 2-in diameter classes in four species groups: Douglas-fir, other shadeintolerant species, western hemlock, and other shade-tolerant species. WestProPlus allows managers to predict stand development by year and for many decades from a specific initial state. The simulations can be stochastic or deterministic. The stochastic simulations are based on bootstrapping of the observed errors in models of stand growth, timber prices, and interest rate. When used in stochastic simulations, this bootstrap technique simulates random variables by sampling randomly (with replacement) from actual observations of the variable, rather than from an assumed distribution. Users can choose cutting regimes by specifying the interval between harvests (cutting cycle) and a target distribution of trees remaining after harvest. A target distribution can be a reverse-J-shaped distribution or any other desired distribution. Diameterlimit cuts can also be simulated. Tabulated and graphic results show diameter distributions, basal area, volumes by log grade, income, net present value, and indices of stand diversity by species and size. This manual documents the program installation and activation, provides suggestions for working with Excel, and gives background information on West-ProPlus's models. It offers a comprehensive tutorial in the form of two practical examples that explain how to start the program, enter simulation data, execute a simulation, compare simulations, and plot summary statistics.

A survey determined that installed dry kiln capacity in Alaska more than doubled to an estimated 220 thousand board feet (mbf) within 4 years (2000-2004). This increased ability to produce dry lumber and value-added products resulted from industry efforts to obtain federal funding to support a dry kiln grant program. This report reviews grantees' progress in implementing grantsupported projects and their impact on the production capabilities of the Alaska lumber drying industry. Data were collected in early 2005 by using a standard set of questions asked of 19 dry kiln owners. Much of the growth in drying and value-added processing capacity has been concentrated in southeast Alaska where there has been the greatest dry kiln investment. During 2004, the estimated volume of lumber dried in Alaska was 813 mbf, whereas potential annual capacity was estimated to be almost 6,600 mbf. This indicates that Alaska producers are drying just over 12 percent of their potential capacity. Factors that will increase the future production of value-added forest products in Alaska include a continuing supply of economically priced timber, the ability of the industry to support a reasonably priced grading service, and the ability of producers to move value-added products to domestic and export markets.

Roger Lake Research Natural Area (RNA), a 174.7-ha reserve in north-central Washington, contains a rich diversity of landforms, plant communities, and wildlife habitats. Spreading outward from the lake itself, sedge and sphagnum fens give way to upland coniferous forest, granitic cliffs, and a relictual, high-altitude big sagebrush-whitebark pine (Artemisia tridentata-Pinus albicaulis) meadow. Five sensitive plant species and several vertebrate species that are rare in the region occur in the RNA. Dynamic ecological processes in action in the RNA are revealed in the paludification of the forest edge; aging, broken beaver dams; and widespread bark beetle-induced conifer mortality.

The Fall River research site in coastal Washington is an affiliate installation of the North American Long-Term Soil Productivity (LTSP) network, which constitutes one of the world's largest coordinated research programs addressing forest management impacts on sustained productivity. Overall goals of the Fall River study are to assess effects of biomass removals, soil compaction, tillage, and vegetation control on site properties and growth of planted Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco). Biomass-removal treatments included removal of commercial bole (BO), bole to 5-cm top diameter (BO5), total tree (TT), and total tree plus all legacy woody debris (TT+). Vegetation control (VC) effects were tested in BO, while soil compaction and compaction plus tillage were imposed in BO+VC treatment. All treatments were imposed in 1999. The preharvest stand contained similar amounts of carbon (C) above the mineral soil (292 Mg/ha) as within the mineral soil to 80- cm depth including roots (298 Mg/ha). Carbon stores above the mineral soil ordered by size were live trees (193 Mg/ha), old-growth logs (37 Mg/ha), forest floor (27 Mg/ha), old-growth stumps and snags (17 Mg/ha), coarse woody debris (11 Mg/ha), dead trees/snags (7 Mg/ha), and understory vegetation (0.1 Mg/ha). The mineral soil to 80-cm depth contained 248 Mg C/ha, and roots added 41 Mg/ha. Total nitrogen (N) in mineral soil and roots (13 349 kg/ha) was more than 10 times the N store above the mineral soil (1323 kg/ha). Postharvest C above mineral soil decreased to 129, 120, 63, and 50 Mg/ha in BO, BO5, TT, and TT+, respectively. Total N above the mineral soil decreased to 722, 747, 414, and 353 Mg/ha in BO, BO5, TT, and TT+, respectively. The ratio of total C above the mineral soil to total C within the mineral soil was markedly altered by biomass removal, but proportions of total N stores were reduced only 3 to 6 percent owing to the large soil N reservoir on site.

Estimates of national forest recreation use are available at the national, regional, and forest levels via the USDA Forest Service National Visitor Use Monitoring (NVUM) program. In some resource planning and management applications, analysts desire recreation use estimates for subforest areas within an individual national forest or for subforest areas that combine portions of several national forests. In this research note we have detailed two approaches whereby the NVUM sampling data may be used to estimate recreation use for a subforest area within a single national forest or for a subforest area combining portions of more than one national forest. The approaches differ in their data requirements, complexity, and assumptions. In the "new forest" approach, recreation use is estimated by using NVUM data obtained only from NVUM interview sites within the area of interest. In the "all-forest information" approach, recreation use is estimated by using sample data gathered on all portions of the national forest(s) that contain the area of interest.

Operational-scale experiments that evaluate the consequences of fire and mechanical "surrogates" for natural disturbance events are essential to better understand strategies for reducing the incidence and severity of wildfire. The national Fire and Fire Surrogate (FFS) study was initiated in 1999 to establish an integrated network of long-term studies designed to evaluate the consequences of using fire and fire surrogate treatments for fuel reduction and forest restoration. Beginning in September2005, four regional workshops were conducted with selected clients to identify effective and efficient means of communicating FFS study findings to users. We used participatory evaluation to design the workshops, collect responses to focused questions and impressions, and summarize the results. We asked four overarching questions: (1) Who needs fuel reduction information? (2) What information do they need? (3) Why do they need it? (4) How can it best be delivered to them? Participants identified key users of FFS science and technology, specific pieces of information that users most desired, and how this information might be applied to resolve fuel reduction and restoration issues. They offered recommendations for improving overall science delivery and specific ideas for improving delivery of FFS study results and information. User groups identified by workshop participants and recommendations for science delivery are then combined in a matrix to form the foundation of a strategic plan for conducting science delivery of FFS study results and information. These potential users, their information needs, and preferred science delivery processes likely have wide applicability to other fire science research.

Soils are fundamental to a healthy and functioning ecosystem. Therefore, forest land managers can greatly benefit from a more thorough understanding of the ecological impacts of fire and fuel management activities on the vital services soils provide. We present a summary of new research on fire effects and soils made possible through the Joint Fire Science Program and highlight management implications where applicable. Some responses were consistent across sites, whereas others were unique and may not easily be extrapolated to other sites. Selected findings include (1) postfire soil water repellency is most likely to occur in areas of high burn severity and is closely related to surface vegetation; (2) although wildfire has the potential to decrease the amount of carbon stored in soils, major changes in land use, such as conversion from forest to grasslands, present a much greater threat to carbon storage; (3) prescribed fires, which tend to burn less severely than wildfires and oftentimes have minor effects on soils, may nonetheless decrease species richness of certain types of fungi; and (4) early season prescribed burns tend to have less impact than late season burns on soil organisms, soil carbon, and other soil properties.

The Fire and Fire Surrogate (FFS) project is a large long-term metastudy established to assess the effectiveness and ecological impacts of burning and fire "surrogates" such as cuttings and mechanical fuel treatments that are used instead of fire, or in combination with fire, to restore dry forests. One of the 13 national FFS sites is the Northeastern Cascades site at Mission Creek on the Okanogan- Wenatchee National Forest. The study area includes 12 forested stands that encompass a representative range of dry forest conditions in the northeastern Cascade Range. We describe site histories and environmental settings, experimental design, field methods, and quantify the pretreatment composition and structure of vegetation, fuels, soils and soil biota, entomology and pathology, birds, and small mammals that occurred during the 2000 and 2001 field seasons. We also describe the implementation of thinning treatments completed during 2003 and spring burning treatments done during 2004 and 2006.

Lichens are one of several forest health indicators sampled every year for a subset of plots on the permanent grid established by the Forest Inventory and Analysis (FIA) Program of the U.S. Department of Agriculture Forest Service. This report reviews analysis procedures for standard FIA lichen indicator data. Analyses of lichen data contribute to state, regional, and national reports that evaluate spatial pattern and temporal trends in forest biodiversity, air quality, and climate.

This document introduces a computer software named SNAP for ArcGIS®, which has been developed to streamline scheduling and transportation planning for timber harvest areas. Using modern optimization techniques, it can be used to spatially schedule timber harvest with consideration of harvesting costs, multiple products, alternative destinations, and transportation systems. SNAP for ArcGIS attempts either to maximize a net present value or minimize discounted costs of harvesting and transportation over the planning horizon while meeting given harvest volume and acreage constraints. SNAP for ArcGIS works in the ArcGIS environment and provides an easy-to-use analytical tool for sophisticated spatial planning of timber harvest.

The U.S. Forest Service’s Pacific Northwest (PNW) Research Station is pleased to announce the arrival of Matt Rollins as the Threat Characterization and Management (TCM) Program Manager.

Invasive nonnative plants may be responsible for serious, long-term ecological impacts, including altering fire behavior and fire regimes. Therefore, knowing how to successfully manage invasive plants and their impacts on natural resources is crucial. We present a summary of research on invasive plants and fire that has been generated through the Joint Fire Science Program—focusing specifically on ecology of species invasions, the interactions between fire and invasives, and the responses of invasives to different management practices. Selected findings include (1) prescribed fire may increase invasive species in some ecosystems; (2) fuel treatments that leave some overstory canopy, minimize exposure of bare ground, and target sites that already host species capable of resprouting may be less likely to promote invasives; and (3) postfire seeding should be approached with caution, as it can increase invasives.

... Check back often, and keep your browser set on www.allaccess.com. … more

Almost two months back (NET NEWS 3/2) ACCURADIO, music streaming’s all-human-curated music website, invited radio professionals “dislocated” by restructuring and … more

The proposal by GEOBROADCAST SOLUTIONS to allow FM boosters to transmit geotargeted programming like ads and news separate from the primary station's programming has gained the support of … more

COX MEDIA GROUP Country KWEN (K95.5)/TULSA is celebrating National Nurses Week with its “Apple A Day” campaign. In partnership with 19TH AND GRAND RECORDS, the station is giving … more

MUSICIANS ON CALL has expanded its Music Pharmacy program, which brings the "healing power of music" to patients in hospitals across the country, sponsored by AMAZON MUSIC and BOSE. … more

STINGRAY will do its part to kick-start CANADA’s economic recovery with the establishment of an economic stimulus plan via its 104 radio stations across the country to help local … more

MIKE ELLIOTT, the former MILWAUKEE host, PD, GM, and sportscaster and HOUSTON ASTROS broadcaster, died APRIL 20th of pneumonia in BAYSIDE, WI at 82. ELLIOTT started his career at … more

Paul has had the idea of taking his programmes online

JIMMY IOVINE and DR. DRE have stepped forward to help COMPTON, CA residents during the COVID-19 pandemic. The duo is funding a program through the city of COMPTON that will provide drive-thru … more

Statement Highlights: In a new scientific statement, the American Heart Association supports the creation of specialized multidisciplinary clinical programs that combine cardiovascular medicine and genetics expertise. These specialized programs would use genetic information to better treat patients with inherited heart conditions, as well as assess family members without current heart problems and take steps to reduce their risk.

WASHINGTON, D.C., April 14, 2020 — Yesterday, a federal district court struck down a rule by the U.S. Department of Agriculture (USDA) that rolled back nutrition standards in schools.   Last fall, The American Heart Association, the world’s leading...

DALLAS, 14 de abril del 2020. La American Heart Association ha extendido la fecha límite para solicitudes de becas individuales y becas escolares ofrecidas a través del Kids Heart Challenge y el American Heart Challenge hasta el 30 de junio. Debido a que...

DALLAS, April 14, 2020 – The American Heart Association has extended the deadline for individual scholarships and school grants offered through Kids Heart Challenge and American Heart Challenge to June 30. As schools nationwide moved to remote learning,...

DES MOINES — The Iowa high school wrestling state duals tournament isn’t going anywhere. The event is remaining at Wells Fargo Arena, taking place the day before the three-day...

The Iowa Supreme Court approved a pilot program in the 4th Judicial District — Audubon, Cass, Fremont, Harrison, Mills, Montgomery, Pottawattamie, Page and Shelby counties — to develop...

“I pledge my Head to clearer thinking, my Heart to greater loyalty, my Hands to larger service, and my Health to better living, for my club, my community, my country, and my world.”...

LUANA
Roger Sieg, 69, died Thursday, May 7, 2020. Leonard-Grau Funeral Home and Cremation Service, Monona.

Watch my video about the incremental approach—the cheapest, smartest, and easiest way to build a website (and a business!) One thing that’s always annoyed me about contract web design and development is this idea that you can actually pay for a finished product to be delivered within a particular time frame. Nothing actually works this […]

The Joe Rogan podcast with Elon Musk was one of the most important events of 2018, and no—I’m not being hyperbolic. If you thought this interview was all about Elon hitting a spliff, you…may have been misled slightly. In reality, Elon helps us peek behind the curtain to get a glimpse of the future: Can […]

The Iowa Supreme Court approved a pilot program in the 4th Judicial District — Audubon, Cass, Fremont, Harrison, Mills, Montgomery, Pottawattamie, Page and Shelby counties — to develop procedures for the use of electronic search warrants.

Electronic search warrants will reduce the time required to obtain warrants, reduce travel time by law enforcement and make more effective use of judges’ time, according to the order. Paper warrants require law enforcement to fill out application forms and then leave the scene of the potential search and drive to find a judge, either at a courthouse during business hours or their home after hours. If the judge grants the warrant, then the officer has to drive back to the scene to execute it.

The electronic warrants can be submitted to a judge from a squad car computer, which is more efficient for law enforcement and the judges.

The pilot program will be evaluated by the court annually and will continue until further notice.

Fourth Judicial District Chief Judge Jeff Larson, who was on the advisory committee to develop recommendations for the new process, talked about the project, which will start in the next few weeks.

Page County Chief Deputy Charles McCalla, 6th Judicial Associate District Judge Nicholas Scott, Linn County Sheriff Capt. Greg McGivern and Marion police Lt. Scott Elam also provided their thoughts about electronic search warrants.

Q: Iowa courts started going paperless in 2010, so why did it take so long to get a pilot program for electronic search warrants?

A: Larson: It had been discussed at various levels since (the electronic document management system) started. We should take advantage of the electronic process because it will save us money. Most law enforcement agencies are now used to filing electronic citations from their patrol cars and offices. There may have been some pushback a few years ago because some counties or offices didn’t have computer scanners and needed technology. Now, the rural offices have that technology.

Q: As a task force member working on this program, what were the hurdles?

A: Larson: It was just working through the procedural issues to make sure there would be a safeguard throughout the process. When a search warrant is needed, law enforcement has to fill out the search warrant package, including the application with all the pertinent information, and submit it to a magistrate judge, associate or district judge in their judicial district. Then the officer or deputy can just call the judge to alert him/her to the warrant and the judge can ask for any additional information needed. The judge then administers the oath of office over the phone and signs off or denies the warrant. Law enforcement doesn’t have to leave the crime scene and can print off the warrant from their squad car computer.

The process of going to electronic warrants started in 2017, when the lawmakers amended the law to allow those to be submitted electronically, and then in 2018, the state court administrator’s office set up an advisory committee to develop recommendations.

Q: What has been the process to get a search warrant?

A: Larson: Law enforcement would have to leave the scene, fill out paperwork and then, many times, travel miles to go to the courthouse to have the judge sign it or if it’s after hours, go to a judge’s home. The officer may not be in the same county as the courthouse where the judge works or where the judge lives. (It) can take a lot of time. The process is way overdue.

Q: Page County Sheriff’s Chief Deputy Charles McCalla, what do you see as the biggest advantage for filing them electronically?

A: McCalla: The smaller counties have limited manpower, and some of the judges, like in Mills County, may be 60 to 70 miles away if a search warrant is needed after hours. Just traveling across the county can take time, depending where you are. At a minimum, we probably have to drive 30 minutes and up to an hour to get to a judge. This will save us time, money for travel and provide safety because we can stay at the scene to ensure the evidence hasn’t been tampered with.

Q: Is there a recent incident where an electronic search warrant may have helped?

A: McCalla: A few weeks ago, there was a theft report for a stolen chain saw and deputies went to the home and saw guns all over the house and they knew the guy who lived there had been convicted. They didn’t want to tip him off, so they just left the scene and went to get a search warrant. Luckily, the evidence was still there when they came back. They found about 90 guns.

Q: How do you feel about being the “guinea pigs” for the process?

A: McCalla: Happy to be. As law enforcement, we’re natural fixers. We find solutions. And this is an idea time to use the process during the COVID-19 pandemic to keep everyone safe. We won’t have to have any face-to-face contact with the judges.

Q: Is Linn County excited about the program, once it’s tested and used across the state?

A: Scott: I think many of us in the criminal justice system are eagerly awaiting the results of the pilot. They have the potential to make the system more efficient. It is in the interest of the police and the suspect, who is often detained pending a warrant, to get the search warrant application reviewed by a judge as soon as possible. A potential benefit is that officers could also use those more often, which protects citizens from unlawful search and seizures if a judge first reviews the evidence.

A: McGivern: I believe the implementation will be a much faster and efficient process for deputies. Like any new process, there may need to be some revisions that will have to be worked out, but I look forward to it.

A: Elam: We’ve done it this way for a long time, and it can be a bit of a haul for us, depending who’s on call (among the judges) — after hours. It’s nice to see there’s a pilot. The concern would be if something goes wrong in the process. If the internet is down or something else. Now, we have to go from Marion to the Linn County Courthouse. Then we go to the county attorney’s office to get a prosecutor to review the warrant and then find a judge (in courthouse during business hours). That takes some time. If you can type out the application from your car right at the scene, it would help with details on the warrant — describing the structure or property needing be searched. I just hope they work out all the bugs first.

Comments: (319) 398-8318; trish.mehaffey@thegazette.com

“I pledge my Head to clearer thinking, my Heart to greater loyalty, my Hands to larger service, and my Health to better living, for my club, my community, my country, and my world.” — 4-H pledge

The Johnson County 4-H program is living up to these words, teaming up with Big Brothers Big Sisters of Johnson County to assemble Camp-in-a-Bag kits for the youngest “Littles” enrolled in the BBBS mentoring program.

Big Brothers Big Sisters creates one-on-one opportunities between adult volunteer mentors and at-risk youths ages 6 to 18. Known as “Bigs” and “Littles,” they meet for at least six hours a month for 18 months. But those in-person outings to movies, museums, restaurants, recreational activities and new adventures, as well as monthly events and school-based programs organized by the agency, are on hold during the COVID-19 pandemic.

So the kits became an outreach outlet.

“I was thinking about ways that we would be able to connect with our Littles, to let them know that we’re thinking about them,” said Dina Bishara, program specialist for Big Brothers Big Sisters of Johnson County. “And also in a very small way, to try to fill that gap that so many kids are experiencing right now. They’re used to the structure and activity of school and extracurricular activities and playing with friends.”

The bags contain more than six hours of STEAM — science, technology, engineering, arts and math — activities, from the pieces needed for building gliders and balloon flyers, to conducting scientific experiments, planting seeds, choosing healthy snacks and writing down their thoughts.

Those activities also reflect the other contributing partners: Johnson County Master Gardeners, Johnson County Extension and Outreach’s Pick a Better Snack program, O’Brien Family McDonalds and Forever Green Garden Center.

“(We wanted to) just give them something really fun and also educational and engaging, to help them spend time with their siblings, if they have them, and get their parents involved, if possible — and just really keep them connected to that learning and the fun, but also to Big Brothers Big Sisters,” Bishara said. “Camp-in-a-Bag helps us structure things in an intentional and thoughtful way.”

Partnering with 4-H, known for its summer camps, fairs and educational programs, “was a really great way to make sure that the activities we were including were really robust, so it was not going to be a hodgepodge, throw-some-things-in-a-bag,” Bishara added. “We really needed to be deliberate about it, to have the directions nicely laid out.”

The first wave is being distributed to 20 elementary-age children, and officials are hoping to expand the project.

“Funding is always a question,” Bishara said. “We would love to expand to 20 or 40 for more. ... We’d sure like to be able to target the kits to a little older kids, who have different interests.”

Bishara and Kate Yoder, who works with 4-H out of the Iowa State University Extension office in Johnson County, are eager to continue their collaborative efforts.

“It really great,” Yoder said. “When you work together, things comes together and amazing things happen. I’m excited to see what the future holds — what partnerships we can build on and grow.”

Comments: (319) 368-8508; diana.nollen@thegazette.com

• What: Big Brothers Big Sisters Camp-in-a-Bag kit contributions

• Contact: Email Dina Bishara at dina@bbbsjc.org

When I wrote about App-pocalypse Now in 2014, I implied the future still belonged to the web. And it does. But it's also true that the web has changed a lot in the last 10 years, much less the last 20 or 30.

Websites have gotten a lot … fatter.

While

In 2020, there is no doubt that people and technology will be very close friends in the future. The modern inhabitant of our planet spends about 45% of his time connecting with technology. We are...

When building new apps, the most important thing developers must decide is which language to program in. There are several languages out there, and some are preferred for certain operating...

We show how to efficiently compute the derivative (when it exists) of the solution map of log-log convex programs (LLCPs). These are nonconvex, nonsmooth optimization problems with positive variables that become convex when the variables, objective functions, and constraint functions are replaced with their logs. We focus specifically on LLCPs generated by disciplined geometric programming, a grammar consisting of a set of atomic functions with known log-log curvature and a composition rule for combining them. We represent a parametrized LLCP as the composition of a smooth transformation of parameters, a convex optimization problem, and an exponential transformation of the convex optimization problem's solution. The derivative of this composition can be computed efficiently, using recently developed methods for differentiating through convex optimization problems. We implement our method in CVXPY, a Python-embedded modeling language and rewriting system for convex optimization. In just a few lines of code, a user can specify a parametrized LLCP, solve it, and evaluate the derivative or its adjoint at a vector. This makes it possible to conduct sensitivity analyses of solutions, given perturbations to the parameters, and to compute the gradient of a function of the solution with respect to the parameters. We use the adjoint of the derivative to implement differentiable log-log convex optimization layers in PyTorch and TensorFlow. Finally, we present applications to designing queuing systems and fitting structured prediction models.

This paper addresses the problem of identifying the graph structure of a dynamical network using measured input/output data. This problem is known as topology identification and has received considerable attention in recent literature. Most existing literature focuses on topology identification for networks with node dynamics modeled by single integrators or single-input single-output (SISO) systems. The goal of the current paper is to identify the topology of a more general class of heterogeneous networks, in which the dynamics of the nodes are modeled by general (possibly distinct) linear systems. Our two main contributions are the following. First, we establish conditions for topological identifiability, i.e., conditions under which the network topology can be uniquely reconstructed from measured data. We also specialize our results to homogeneous networks of SISO systems and we will see that such networks have quite particular identifiability properties. Secondly, we develop a topology identification method that reconstructs the network topology from input/output data. The solution of a generalized Sylvester equation will play an important role in our identification scheme.

We introduce primal and dual stochastic gradient oracle methods for decentralized convex optimization problems. Both for primal and dual oracles the proposed methods are optimal in terms of the number of communication steps. However, for all classes of the objective, the optimality in terms of the number of oracle calls per node in the class of methods with optimal number of communication steps takes place only up to a logarithmic factor and the notion of smoothness. By using mini-batching technique we show that all proposed methods with stochastic oracle can be additionally parallelized at each node.

This paper develops a method for obtaining guaranteed outer approximations for global attractors of continuous and discrete time nonlinear dynamical systems. The method is based on a hierarchy of semidefinite programming problems of increasing size with guaranteed convergence to the global attractor. The approach taken follows an established line of reasoning, where we first characterize the global attractor via an infinite dimensional linear programming problem (LP) in the space of Borel measures. The dual to this LP is in the space of continuous functions and its feasible solutions provide guaranteed outer approximations to the global attractor. For systems with polynomial dynamics, a hierarchy of finite-dimensional sum-of-squares tightenings of the dual LP provides a sequence of outer approximations to the global attractor with guaranteed convergence in the sense of volume discrepancy tending to zero. The method is very simple to use and based purely on convex optimization. Numerical examples with the code available online demonstrate the method.

The problem of minimizing an entropy functional subject to linear constraints is a useful example of partially finite convex programming. In the 1990s, Borwein and Lewis provided broad and easy-to-verify conditions that guarantee strong duality for such problems. Their approach is to construct a function in the quasi-relative interior of the relevant infinite-dimensional set, which assures the existence of a point in the core of the relevant finite-dimensional set. We revisit this problem, and provide an alternative proof by directly appealing to the definition of the core, rather than by relying on any properties of the quasi-relative interior. Our approach admits a minor relaxation of the linear independence requirements in Borwein and Lewis' framework, which allows us to work with certain piecewise-defined moment functions precluded by their conditions. We provide such a computed example that illustrates how this relaxation may be used to tame observed Gibbs phenomenon when the underlying data is discontinuous. The relaxation illustrates the understanding we may gain by tackling partially-finite problems from both the finite-dimensional and infinite-dimensional sides. The comparison of these two approaches is informative, as both proofs are constructive.

A brain-computer interface (BCI) enables a user to communicate with a computer directly using brain signals. Electroencephalograms (EEGs) used in BCIs are weak, easily contaminated by interference and noise, non-stationary for the same subject, and varying across different subjects and sessions. Therefore, it is difficult to build a generic pattern recognition model in an EEG-based BCI system that is optimal for different subjects, during different sessions, for different devices and tasks. Usually, a calibration session is needed to collect some training data for a new subject, which is time consuming and user unfriendly. Transfer learning (TL), which utilizes data or knowledge from similar or relevant subjects/sessions/devices/tasks to facilitate learning for a new subject/session/device/task, is frequently used to reduce the amount of calibration effort. This paper reviews journal publications on TL approaches in EEG-based BCIs in the last few years, i.e., since 2016. Six paradigms and applications -- motor imagery, event-related potentials, steady-state visual evoked potentials, affective BCIs, regression problems, and adversarial attacks -- are considered. For each paradigm/application, we group the TL approaches into cross-subject/session, cross-device, and cross-task settings and review them separately. Observations and conclusions are made at the end of the paper, which may point to future research directions.

Histopathology is a reflection of the molecular changes and provides prognostic phenotypes representing the disease progression. In this study, we introduced feature scores generated from hematoxylin and eosin histology images based on deep learning (DL) models developed for prostate pathology. We demonstrated that these feature scores were significantly prognostic for time to event endpoints (biochemical recurrence and cancer-specific survival) and had simultaneously molecular biologic associations to relevant genomic alterations and molecular subtypes using already trained DL models that were not previously exposed to the datasets of the current study. Further, we discussed the potential of such feature scores to improve the current tumor grading system and the challenges that are associated with tumor heterogeneity and the development of prognostic models from histology images. Our findings uncover the potential of feature scores from histology images as digital biomarkers in precision medicine and as an expanding utility for digital pathology.