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• 7861. [Image] Lecanactis dubia

  	Hymenium; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: ...
  	Citation × Citation Citation Abstract Copy Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Hymenium; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Hymenium; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Close

• 7862. [Image] Lecanactis dubia

  	Habit; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: ...
  	Citation × Citation Citation Abstract Copy Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Habit; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Habit; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Close

• 7863. [Image] Lecanactis dubia

  	Spores; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: ...
  	Citation × Citation Citation Abstract Copy Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Spores; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Spores; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Close

• 7864. [Image] Lecanactis dubia

  	Habit; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: ...
  	Citation × Citation Citation Abstract Copy Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Habit; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Habit; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Close

• 7865. [Image] Lecanactis dubia

  	Ascus; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: ...
  	Citation × Citation Citation Abstract Copy Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Ascus; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Ascus; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Close

• 7866. [Image] Lecanactis dubia

  	Asci IKI; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: ...
  	Citation × Citation Citation Abstract Copy Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Asci IKI; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Title: Lecanactis dubia Author: McCune, Bruce Year: 2017 Asci IKI; Habitat: Crown of old Sequoia sempervirens in old forest; Location: Near southern end of fenced loop in campground in Pfeiffer Big Sur State Park; Substrate: Wood, Sequoia sempervirens; Elevation: 62 meters; Notes: Sp 16.4-20 x 3.5-4.1 um, 3-sep, asci and hym K/I+B, I+ yellow orange. Photos; Collected by: Rikke Reese Naesborg. Close

• 7867. [Article] Toolbox Talks to Prevent Construction Fatalities: Empirical Development and Evaluation

  Three studies were conducted to develop and evaluate safety toolbox talks about fatal construction incidents. Study 1 surveyed workers (n = 28) about existing pre-shift meetings. An evidence-based structure ...

  Citation × Citation Citation Abstract Copy Title: Toolbox Talks to Prevent Construction Fatalities: Empirical Development and Evaluation Author: Olson, Ryan, Varga, Alexandra, Cannon, Annie, Gilbert-Jones, Illa, Zoller, Erika Year: 2016 Three studies were conducted to develop and evaluate safety toolbox talks about fatal construction incidents. Study 1 surveyed workers (n = 28) about existing pre-shift meetings. An evidence-based structure for toolbox talks was developed, and study 2 evaluated our selected line drawing illustration format with workers (n = 30). Study 3 evaluated supervisors’ talks using: (1) new toolbox guides and (2) long-form investigation reports with workers from eight construction crews. In study 1, 25% of the sample reported never conducted safety meetings. In study 2, compared to photos, line drawings increased the distance workers’ could correctly identify hazards by over 1.5 m. In study 3, the new format was preferred by 82% of supervisors, saved them 15 min preparation/presentation time, and produced favorable impacts with workers. Brief scripted toolbox talks made it easier for supervisors to share fatal stories and prevention recommendations with their crews. When the format includes scripted text for the supervisors, prompts for discussion and action items, and line drawings worker understanding can be enhanced. Title: Toolbox Talks to Prevent Construction Fatalities: Empirical Development and Evaluation Author: Olson, Ryan, Varga, Alexandra, Cannon, Annie, Gilbert-Jones, Illa, Zoller, Erika Year: 2016 Three studies were conducted to develop and evaluate safety toolbox talks about fatal construction incidents. Study 1 surveyed workers (n = 28) about existing pre-shift meetings. An evidence-based structure for toolbox talks was developed, and study 2 evaluated our selected line drawing illustration format with workers (n = 30). Study 3 evaluated supervisors’ talks using: (1) new toolbox guides and (2) long-form investigation reports with workers from eight construction crews. In study 1, 25% of the sample reported never conducted safety meetings. In study 2, compared to photos, line drawings increased the distance workers’ could correctly identify hazards by over 1.5 m. In study 3, the new format was preferred by 82% of supervisors, saved them 15 min preparation/presentation time, and produced favorable impacts with workers. Brief scripted toolbox talks made it easier for supervisors to share fatal stories and prevention recommendations with their crews. When the format includes scripted text for the supervisors, prompts for discussion and action items, and line drawings worker understanding can be enhanced. Close

• 7868. [Article] Determination of the Goos-Hänchen Shift in Dielectric WaveGuides via Photo Emission Electron Microscopy in the Visible Spectrum

  Photoemission Electron Microscopy (PEEM) is a versatile tool that relies on the photoelectric effect to produce high-resolution images. Pulse lasers allow for multi-photon PEEM where multiple photons are ...

  Citation × Citation Citation Abstract Copy Title: Determination of the Goos-Hänchen Shift in Dielectric WaveGuides via Photo Emission Electron Microscopy in the Visible Spectrum Author: Stedmark, Theodore, Word, Robert Campbell, Kӧnenkamp, Rolf Year: 2016 Photoemission Electron Microscopy (PEEM) is a versatile tool that relies on the photoelectric effect to produce high-resolution images. Pulse lasers allow for multi-photon PEEM where multiple photons are required excite a single electron. This non-linear process can directly image the near field region of electromagnetic fields in materials. We use this ability here to analyze wave propagation in a linear dielectric waveguide with wavelengths of 410nm and 780nm. The propagation constant of the waveguide can be extracted from the interference pattern created by the coupled and incident light and shows distinct polarization dependence. The electromagnetic field interaction at the boundaries can then be deduced which is essential to understand power flow in wave guiding structures. These results match well with simulations using finite element techniques. Title: Determination of the Goos-Hänchen Shift in Dielectric WaveGuides via Photo Emission Electron Microscopy in the Visible Spectrum Author: Stedmark, Theodore, Word, Robert Campbell, Kӧnenkamp, Rolf Year: 2016 Photoemission Electron Microscopy (PEEM) is a versatile tool that relies on the photoelectric effect to produce high-resolution images. Pulse lasers allow for multi-photon PEEM where multiple photons are required excite a single electron. This non-linear process can directly image the near field region of electromagnetic fields in materials. We use this ability here to analyze wave propagation in a linear dielectric waveguide with wavelengths of 410nm and 780nm. The propagation constant of the waveguide can be extracted from the interference pattern created by the coupled and incident light and shows distinct polarization dependence. The electromagnetic field interaction at the boundaries can then be deduced which is essential to understand power flow in wave guiding structures. These results match well with simulations using finite element techniques. Close

• 7869. [Article] Thumbnail Preserving Encryption for JPEG

  With more and more data being stored in the cloud, securing multimedia data is becoming increasingly important. Use of existing encryption methods with cloud services is possible, but makes many web-based ...

  Citation × Citation Citation Abstract Copy Title: Thumbnail Preserving Encryption for JPEG Author: Wright, Charles V., Feng, Wu-chi Year: 2015 With more and more data being stored in the cloud, securing multimedia data is becoming increasingly important. Use of existing encryption methods with cloud services is possible, but makes many web-based applications difficult or impossible to use. In this paper, we propose a new image encryption scheme specially designed for protecting JPEG images in cloud photo storage services. Our technique allows efficient reconstruction of an accurate low-resolution thumbnail from the ciphertext image, but aims to prevent the extraction of any more detailed information. This will allow efficient storage and retrieval of image data in the cloud but protect its contents from outside hackers or snooping cloud administrators. Experiments of the proposed approach using an online selfie database show that it can achieve a good balance of privacy, utility, image quality, and file size. Title: Thumbnail Preserving Encryption for JPEG Author: Wright, Charles V., Feng, Wu-chi Year: 2015 With more and more data being stored in the cloud, securing multimedia data is becoming increasingly important. Use of existing encryption methods with cloud services is possible, but makes many web-based applications difficult or impossible to use. In this paper, we propose a new image encryption scheme specially designed for protecting JPEG images in cloud photo storage services. Our technique allows efficient reconstruction of an accurate low-resolution thumbnail from the ciphertext image, but aims to prevent the extraction of any more detailed information. This will allow efficient storage and retrieval of image data in the cloud but protect its contents from outside hackers or snooping cloud administrators. Experiments of the proposed approach using an online selfie database show that it can achieve a good balance of privacy, utility, image quality, and file size. Close

• 7870. [Article] Listening to Lasers: Photoacoustic Gas Sensing

  Herein lies the makings of a sensor for gaseous materials due to the technique known as photo-acoustic spectroscopy. Whereby a gas filled metallic tube of known resonance has an impingement to its open ...

  Citation × Citation Citation Abstract Copy Title: Listening to Lasers: Photoacoustic Gas Sensing Author: Hopkins, Michael Year: 2016 Herein lies the makings of a sensor for gaseous materials due to the technique known as photo-acoustic spectroscopy. Whereby a gas filled metallic tube of known resonance has an impingement to its open aspect a beam of photons of known colour and at a specified rate such that the rate of incoming light corpuscles matches the natural standing wave frequency for the column of gas within said tube, to wit resonance. Through foresight of the molecular orbital theory and historic datums on the subject of infrared spectroscopy one naturally comes to the employment of absorbance transfiguring energy to kinetic motions within a known gas species as a mechanism for spectroscopic analysis. Many fortnights gone by a device of these humours was constructed and found not wanting in capability, this device shall henceforth be described in placard shewing and by the telling of its constructor. Title: Listening to Lasers: Photoacoustic Gas Sensing Author: Hopkins, Michael Year: 2016 Herein lies the makings of a sensor for gaseous materials due to the technique known as photo-acoustic spectroscopy. Whereby a gas filled metallic tube of known resonance has an impingement to its open aspect a beam of photons of known colour and at a specified rate such that the rate of incoming light corpuscles matches the natural standing wave frequency for the column of gas within said tube, to wit resonance. Through foresight of the molecular orbital theory and historic datums on the subject of infrared spectroscopy one naturally comes to the employment of absorbance transfiguring energy to kinetic motions within a known gas species as a mechanism for spectroscopic analysis. Many fortnights gone by a device of these humours was constructed and found not wanting in capability, this device shall henceforth be described in placard shewing and by the telling of its constructor. Close