Share on FacebookShare on TwitterShare on LinkedinShare via Email Share via Shortlink Contact E.B. Solomont Full Name* Email Address* Knock CFO Michelle DeBella and CEO Sean Black (Photos via Knock; PR Newswire)Knock, a startup that helps people buy new homes before selling their old ones, has tapped a former Lyft and Uber executive as its new CFO.The company said Michelle DeBella will report directly to Knock’s co-founder and CEO Sean Black, who previously co-founded Trulia. Her focus will be on driving “profitable growth” for Knock’s Home Swap program, which pre-funds mortgages to give homeowners more flexibility when buying and selling a home.DeBella was most recently a vice president of finance transformation and governance at Lyft.Before that, she was global head of internal audit at Uber.At both companies, she helped scale the finance departments ahead of their IPOs, Knock said. She previously spent 17 years at Ernst & Young and nearly a decade at Hewlett Packard.ADVERTISEMENTBased in New York, Knock has raised more than $600 million in debt and equity since 2015. Investors include RRE ventures, Foundry Group, Redpoint, Greycroft, Corazon Capital, Correlation Ventures, Great Oaks Venture Capital and FJ Labs.In a statement, Black said DeBella was joining Knock at a “critical inflection point” in the company’s trajectory.Until last year, Knock’s main offering was a trade-in program, where it purchased homes on behalf of consumers while helping them sell and list their old house. Once the home sold, the seller paid back Knock.Citing friction in that model, Knock rolled out its new Home Swap program in July 2020. Knock also offers sellers interest-free bridge loans, for up to $25,000, to fix up their old homes before listing them for sale. If a home fails to sell in six months, Knock offers a backup offer.Knock’s Home Swap is available in 15 markets, including Arizona, Colorado and Texas. It recently expanded to South Florida. Knock plans to expand to 21 markets by mid-2021 and 75 markets by 2023.Read moreKnock expands to South Florida Homebuying startup Knock pivots to lending Knock raises $400M in 2019 Message* Share via Shortlink TagsHousing Marketibuyersstartups
From left to right: Keller Williams president Marc King, Carl Liebert, CEO of KWx, the parent holding company of KW and Gary Keller, executive chairman, KWx and Keller Williams. (Keller Williams/Illustration by Kevin Rebong for The Real Deal)The restructuring of Keller Williams’ C-suite continues, with the brokerage announcing a new president and a spate of executive promotions.The firm’s co-directors of growth, Marc King and Matt Green, will now serve as president and head of agent and partner experience, respectively. Jason Abrams will assume the role of head of industry, a move up from his previous role as the vice president of industry. And Chris Cox, who previously worked for Bain Consulting, was appointed as the head of technology and digital.The moves come less than six months after another executive shakeup at the firm. Gary Keller stepped down as CEO last October to assume the role of executive chairman of the brokerage’s parent company, KWx. At the time, Josh Team transitioned to the role of company president, and no CEO was appointed.Read moreGary Keller’s second comingGary Keller steps down as Keller Williams CEO brokerageskeller williamsResidential Real Estate Keller said that Team “led the company during a time when agents experienced their most productive quarter ever,” and wished him “all the best as he moves on to the next chapter in his career.”Team announced his move in a Facebook post Monday, Inman reported, but did not say what his next move would be.The moves bulked up the real estate expertise in the company’s C-suite, which could be an asset for Carl Liebert, the CEO of KWx, a veteran executive who does not hail from the industry.“I wanted to surround myself with highly successful leaders and real estate agents to keep me grounded and help me stay in-tune to our agents’ needs across our market centers, realistically understanding their day-to-day business and what they need to stay on top and drive growth,” Liebert said.The real estate brokerage, which has in recent years intensified its focus on building out its technology offerings, announced the executive reshuffling on the heels of its fourth quarter earnings. Keller Williams reported $407.4 billion in sales volume, an increase of 16 percent compared with 2019, and its agents closed 1,222,377 transactions in 2020, a 7.9 increase from 2019.Contact Georgia Kromrei Full Name* Tags Email Address* Message* Share via Shortlink Share on FacebookShare on TwitterShare on LinkedinShare via Email Share via Shortlink
Tags Share via Shortlink Full Name* Message* Such services aren’t necessarily new. Apple, Google and other tech companies in a war for talent have provided amenities to their employees for years. But now the pressure is on to lure workers back to the workplace.Related Companies is rolling out an outdoor space equipped with wifi and power outlets. Employees also can receive free Covid-19 testing and babysitting.Silverstein Properties has introduced parking discounts, Uber and Lyft credits and, for those still unwilling to come in, virtual fitness classes to stay connected.Still, some don’t see the new offerings bringing back employees.“The ice cream socials are appreciated but not a factor,” Jonathan Wasserstrum, CEO of SquareFoot, a commercial real estate broker based in Manhattan, told the Journal.[WSJ] — Sasha JonesContact Sasha Jones (iStock/Illustration by Kevin Rebong for The Real Deal)In Manhattan, where just 15 percent of workers have returned to the office, landlords are getting frustrated competing with employees’ couches.So they’re offering amenities ranging from on-site child care to dry-cleaning pickup and parking discounts — anything to bring back employees, according to the Wall Street Journal.Tishman Speyer, for example, is dangling free use of a new co-working space, an app to book services ranging from manicures to grocery delivery, newly installed picnic tables and even free tarts.Read moreYelp employees may work remotely foreverOffice unease: Tenants are paying up but staying away“Little bit of guilt trip”: Jeff Blau joins landlords pushing return to work Share on FacebookShare on TwitterShare on LinkedinShare via Email Share via Shortlink Email Address* office marketRelated Companiessilverstein propertiestishman speyer
Activity recorders were attached to 13 Gray-headed Albatrosses (Diomedea chrysostoma) rearing chicks at South Georgia in February 1982. During foraging trips to sea totalling 284 bird-days, an average of 74% of the time was spent flying, and 15% of the day and 50% of the night were spent on the sea. The extensive nocturnal activity on the water strongly supports suggestions that the species feeds mainly at night. Using activity budget data with field data on foraging trip length and flight speeds and patterns, maximum foraging range is estimated to be 500-800 km.
Differential scanning calorimetry was used to characterize thermal events associated with freezing and melting of suspensions and extracts of Panagrolaimus davidi, an Antarctic nematode which can survive intracellular freezing. Nematode suspensions produced a single freezing exotherm with a shoulder on the peak representing the freezing of the nematodes. A shoulder on the peak of melting endotherms indicates the melting of the nematodes and of the water surrounding them. Exotherms were also detected from individual nematodes mounted in liquid paraffin. The freezing of nematodes was very rapid and in marked contrast to that of freezing-tolerant insects and vertebrates, which take hours or days to freeze. Eighty-two percent of the nematodes’ body water froze. High levels of survival were obtained in nematodes exposed to temperatures down to -40 degrees C. No additional thermal events were observed after the freezing event and before the melting of samples cooled to -40 degrees C, indicating no changes in the proportion of body water frozen. Ice nucleating activity is present in nematode suspensions but not in supernatants from nematode extracts. No thermal hysteresis activity was detected in nematode extracts.
The calcium (representing dust) concentration record of the last 100,000 years from the Greenland Ice Core Project (GRIP) ice core shows a huge dynamic range (factor>100). The relationship between dust concentrations and temperature (represented by the oxygen isotope ratio) is not a simple one, as has often been assumed. A rapid alternation (factor of 5–10) between low concentrations during the Dansgaard-Oeschger interstadial periods and high levels in colder periods is superimposed on a long-term trend encompassing a further factor of 5–10. Within climate periods, there is only a very weak relationship between Ca concentration and temperature. Previous authors [Biscaye et al., 1997] have suggested that the most likely source for the increased dust is eastern Asia. For the first time, we consider each possible cause of both rapid and slow increases from source to deposition. We suggest that, to account for the size and rapidity of the fast changes, significantly higher wind speed in the source area is required, although changes in atmospheric residence time could also play a role. For the slower long-term variability, changes in transport speed or, possibly, route are probably also involved. Changes in the size of the source area could give some change on longer time periods. The probable importance of changes in source area wind speed, almost simultaneous with Greenland temperature changes, confirms that climatic parameters in high and low latitudes were strongly coupled through the atmosphere during glacial climatic changes. This adds to evidence that the atmospheric circulation system underwent almost instantaneous large-scale changes during the last glacial period.
 Relativistic (> 1 MeV) ‘killer electrons’ are frequently generated in the Earth’s inner magnetosphere during the recovery phase of a typical magnetic storm. We test the hypothesis that the energization of electrons takes place by means of stochastic gyroresonant interaction between lower-energy (several 100 keV) seed electrons and whistler-mode chorus waves. We develop a model kinetic equation for the electron energy distribution, and utilize both electron and whistler-mode wave data at L=4 for a typical geomagnetic storm (on October 9, 1990) from instruments carried on the Combined Release and Radiation Effects Satellite (CRRES). Our model solutions are found to match well with the CRRES profiles of the electron flux. We conclude that the mechanism of stochastic acceleration by whistler-mode turbulence is a viable candidate for generating killer electrons, not only for the storm considered, but for similar storms with a several-day recovery phase containing prolonged substorm activity.
Soil bacterial diversity at environmentally distinct locations on Signy Island, South Orkney Islands was examined using the denaturing gradient gel profiling approach. A range of chemical variables in soils at each site was determined in order to describe variation between locations. No apparent differences in Shannon Diversity Index (H’) were observed. However, as revealed in an analysis of similarity (ANOSIM), the dominant bacterial communities of all eight studied locations were significantly different. Within this, higher levels of similarity were observed between penguin rookeries, seal wallows and vegetated soils, all of which share varying levels of impact from vertebrate activity, in contrast with more barren soil. In addition, the lowest H’ value was detected from the latter soil which also has the most extreme environmental conditions, and its bacterial community has the greatest genetic distance from the other locations. DGGE analyses indicated that the majority of the excised and sequenced bands were attributable to the Bacteroidetes. Across a range of ten environmental variables, multivariate correlation analysis suggested that a combination of pH, conductivity, copper and lead content potentially contributed explanatory value to the measured soil bacterial diversity.
This paper examines the role of atmospheric forcing in modifying the pathways of riverine water on the Laptev Sea shelf, using summer-to-winter hydrographic surveys from 2007-2009. Over the two consecutive winter seasons of 2007-2008 and 2008-2009 in the area of the winter coastal polynya, our data clearly link winter surface salinity fields to the previous summer conditions, with substantially different winter salinity patterns preconditioned by summer atmospheric forcing. In the summer of 2007 dominant along-shore westerly winds in the cyclonic regime force the Lena River runoff to flow eastward. In contrast, in the summer of 2008 dominant along-shore easterly winds over the East Siberian Sea and on-shore northerly winds over the Laptev Sea in the anticyclonic regime lock the riverine water in the vicinity of the Lena Delta. Over the coastal polynya area in the southeastern Laptev Sea these patterns precondition a surface salinity difference of 8-16 psu between the winters of 2008 and 2009. Overall, this indicates a residence time of at least half a year for riverine water on the Laptev Sea shelf. Future climate change associated with enhanced summer cyclonicity over the eastern Arctic may turn more riverine water eastward along the eastern Siberian coast, resulting in weaker vertical density stratification over the Laptev Sea shelf with possible impact on the efficiency of vertical mixing and polynya dense water production.
NOx measurements were conducted at the Halley Research Station, coastal Antarctica, during the austral summer period 1 January–10 February 2005. A clear NOx diurnal cycle was observed with minimum concentrations close to instrumental detection limit (5 pptv) measured between 04:00–05:00 GMT. NOx concentrations peaked (24 pptv) between 19:00–20:00 GMT, approximately 5 h after local solar noon. An optimised box model of NOx concentrations based on production from in-snow nitrate photolysis and chemical loss derives a mean noon emission rate of 3.48 × 108 molec cm−2 s−1, assuming a 100 m boundary layer mixing height, and a relatively short NOx lifetime of ~6.4 h. This emission rate compares to directly measured values ranging from 2.1 to 12.6 × 108 molec cm−2 s−1 made on 3 days at the end of the study period. Calculations of the maximum rate of NO2 loss via a variety of conventional HOx and halogen oxidation processes show that the lifetime of NOx is predominantly controlled by halogen processing, namely BrNO3 and INO3 gas-phase formation and their subsequent heterogeneous uptake. Furthermore the presence of halogen oxides is shown to significantly perturb NOx concentrations by decreasing the NO/NO2 ratio. We conclude that in coastal Antarctica, the potential ozone production efficiency of NOx emitted from the snowpack is mitigated by the more rapid NOx loss due to halogen nitrate hydrolysis.