Cornel University

University Gardens, NY, United States

Cornel University

University Gardens, NY, United States
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Deiner K.,University of California at Davis | Deiner K.,Cornel University | Hull J.M.,U.S. Fish and Wildlife Service | May B.,University of California at Davis
PLoS ONE | Year: 2017

Wetland habitats across the world are experiencing rapid modification and loss due to accelerating habitat conversion. Impacts to wetland habitats are particularly acute in California where up to 90% of wetland habitats have been modified or lost. Vernal pool ecosystems have therefore undergone a dramatic loss in habitat and along with them an entire endemic fauna is under threat of extinction. Recent efforts to conserve vernal pool habitat and associated species have involved restoration and creation of vernal pools as well as translocations of threatened species. The vernal pool fairy shrimp, Branchinecta lynchi, is one of several endemic and federally listed species being targeted for translocations. To guide reintroduction and conservation, detailed information on range-wide population structure and diversity is needed. We collected genetic data from two mitochondrial genes throughout the known extant range of B. lynchito elucidate population structure and diversity of the species. We found support for phylogeographic structure throughout the range of B. lynch associated with isolated watersheds and vernal pool regions previously identified in the recovery plan for the species. The underlying mechanisms responsible for this broad pattern of genetic structure have yet to be identified. However, the evidence of only a few haplotypes being shared across the species range and patterns of isolation by distance within vernal pool regions suggests dispersal limitation may play a role. These results stress that conservation programs, at a minimum, should consider using individuals from regional populations as sources for reintroductions to maintain historical patterns of genetic differentiation. Additionally, because genetic structure is associated with vernal pool regions which are based on local hydrology and geology, translocations should proceed considering the distance between donor and recipient sites.

Cramer N.,University of California at Santa Cruz | Swei S.S.M.,NASA | Cheung K.C.,NASA | Cellucci D.,Cornel University | And 2 more authors.
58th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2017 | Year: 2017

This paper introduces a low order spring-mass-damper model of a carbon fiber octahedron voxel, which is used to create a template for a large flexible, light weight, space structure. The proposed template is used to develop a decentralized linear matrix inequality (LMI) based control design for suppressing structural vibrations subjected to both output and control input constraints. The proposed structural model consists of active voxels (with control authority) and passive voxels (without control authority). The performance of various quantities of active voxels are compared using the developed control approach. © 2017, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.

Deng W.,Chinese National Engineering Research Center for Information Technology in Agriculture | Zhao C.-J.,Chinese National Engineering Research Center for Information Technology in Agriculture | Zhang L.-D.,China Agricultural University | Cheng L.-P.,Chinese National Engineering Research Center for Information Technology in Agriculture | Landers A.,Cornel University
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2011

Target detection is one of the key technology of precision chemical application. Previously the digital coding modulation technique was commonly used to emit and receive the optical signal in the target detection systems previously in China. It was difficult to adjust the output power, and the anti-interference ability was weak in these systems. In order to resolve these problems, the target detection method based on analog sine-wave modulation was studied. The spectral detecting system was set up in the aspects of working principle, electric circuit, and optical path. Lab testing was performed. The results showed that the reflected signal from the target varied inversely with detection distances. It indicated that it was feasible to establish the target detection system using analog sine-wave modulation technology. Furthermore, quantitative measurement of the reflected optical signal for near-infrared and visible light could be achieved by using this system. The research laid the foundation for the future development of the corresponding instrument.

Zhang H.,China Agricultural University | Wang P.-J.,China Agricultural University | Lei X.-G.,Cornel University | Yang H.-J.,Quality Control and Inspection Center for Domestically Animal Products | And 3 more authors.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2013

The effects of heat treatment (heating temperature and pH) on the structures and emulsifying properties of caseins were systematically studied by spectroscopy. Heat treatment from 60 to 100°C resulted in an increase in their fluorescence intensity, hydrodynamic diameter, turbidity and emulsifying activity index, but decreased the size polydispersity of caseins. In the pH range of 5.5 to 7.0, the fluorescence intensity, hydrodynamic diameter, turbidity and emulsifying properties decreased with increased heating pH, but the size polydispersity of caseins increased with increased pH. The relationship between the surface fluorescence intensity and emulsifying activity was also investigated, revealing a correlation coefficient of 0.90. These results suggested that heat treatment could be used to modify the structures and emulsifying properties of caseins by appropriately selecting heating conditions.

Soltani M.,Cornell University | Soltani M.,Howard Hughes Medical Institute | Lin J.,Cornell University | Lin J.,Howard Hughes Medical Institute | And 7 more authors.
CLEO: Science and Innovations, CLEO_SI 2013 | Year: 2013

We design and demonstrate electrically controlled optical trapping of individual microparticles and manipulation of biomolecules with nm-scale precision for high throughput applications. This has been realized by integration of photonics, fluidics, and electronics, on-chip. © 2013 Optical Society of America.

Soltani M.,Cornell University | Soltani M.,Howard Hughes Medical Institute | Killian J.L.,Cornell University | Lin J.,Cornell University | And 5 more authors.
Optics InfoBase Conference Papers | Year: 2014

We show ability to simultaneously trap micron-size particles in an optical field and freeze their position by rapidly changing the direction of Poynting vector in an optofluidic waveguide using an electrically controlled Mach-Zehnder switch. © 2014 OSA.

Ohm C.,Cornel University | Welch M.E.,Cornel University | Ober C.K.,Cornel University
Journal of Materials Chemistry | Year: 2012

Articles published in the issue of the Journal of Materials Chemistry summarize aspects of topics highlighting the significance of biosurfaces. The first two topics deal with means to control the attachment of biological materials, such as cells, DNA, and proteins to artificial surfaces. The third category of biosurface interaction described in this themed issue deals with smart surfaces that can be switched between a bio-friendly and a bio-repellent state. This allows a controlled release of biomaterials, such as drugs or cells. The authors also demonstrate in the forth category of reports as to how materials scientists can adapt principals from nature to produce biocompatible surfaces that find applications in many aspects of medical treatment and materials science.

Liu Y.-C.,Cornel University | Savas A.J.,Cornel University | Avedisian C.T.,Cornel University
ASME 2011 International Mechanical Engineering Congress and Exposition, IMECE 2011 | Year: 2011

This study examines the extent to which a ternary mixture of n-decane/iso-octane/toluene in the specific mixture fraction of 42.67/33.02/24.31 (mole fraction), respectively, can replicate the droplet burning characteristics of an aviation fuel, Jet-A (designated by the Air Force as "POSF4658"). Experiments were carried out to examine the droplet combustion characteristics in an environment which minimizes convection to promote spherical symmetry in the burning process. The evolution of droplet diameter, burning rate and flame and soot stand-off ratios were compared to Jet-A to evaluate the potential of this ternary to serve as a Jet-A surrogate regarding the droplet burning process. The results show that the ternary blend has a shorter transient droplet heating period than Jet-A and it closely replicates the evolution of droplet diameter and burning rate. The burning rates for these two fuels are close at the end of burning, and flame and soot standoff ratios for the ternary are also reasonably close to those of Jet-A. The results also suggest that the spherical droplet flame configuration can be a useful tool to evaluate the extent to which a mixture of single component fuels may serve as a surrogate of a real transportation fuel. Copyright © 2011 by ASME.

Cornel University | Date: 2011-02-09

A new and distinct variety of apple tree rootstock Malus domesticaMalus robusta hybrid G.210 is described herein. The new variety is a semi-dwarfing rootstock that is resistant to fire blight (Erwinia amylovora) and crown rot (Phytophthora cactorum). The G.210 rootstock is useful in that it can be propagated clonally and used as a rootstock or root system for apple trees as well as for interstems of apple trees.

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