Academic literature on the topic 'Zion Tunnel'

Constructed in 1930 and recently designated as a National Historic Civil Engineering Landmark, the 1.1 mile long Zion–Mt. Carmel Tunnel has served Zion National Park in Utah well for several decades. With the passage of time, however, vehicles have become larger and this has necessitated the use of one-way operation to allow large vehicles to pass through the narrow tunnel. In recent years the number of visits to National Parks in the Colorado Plateau region has greatly increased. For example, visits to Zion National Park increased by 69% from 2010 to 2017. Accompanying the increase in visitor numbers has been an increase in traffic volume. As traffic volume has grown, two questions have become more obvious: What is the highway capacity of the Zion–Mt. Carmel Tunnel? And, how soon will the tunnel reach capacity? This paper covers a unique traffic engineering/highway capacity problem and describes: (a) the current method of operating the tunnel (both two-way and one-way operation); (b) data collection and analysis; (c) how one-way operation degrades tunnel capacity; (d) calculation of tunnel capacity and waiting times; (e) how soon the tunnel will reach capacity; and (f) alternatives for addressing the capacity problem.

Aim. To describe the technique and to assess the results of phacoemulsification in eyes with extensive zonular defects of Zinn ligament fibers. Methods. Phacoemulsification was performed through a 2.2- mm corneal tunnel incision on adhesive viscoelastic bed. The lens was stabilized with a capsular tension ring. The operation was finished with intraocular implantation and its suturing to the iris. The study included 36 patients [42 eyes, 23 males (63.9%), 13 females (36.1%)] in whom phacoemulsification has been performed. Visual acuity before surgery ranged from 0.01 to 0.7 (mean 0.2±0.18). Intraocular pressure ranged from 15 to 25 mm Hg (mean 19.2±4.5 mm Hg). Corneal astigmatism value before surgery ranged from 0 to 2.25 D (mean 0.87±0.63 D). Results. Postoperatively the following complications were observed: an inflammatory reaction in 3 eyes (7.1%), inflammation of Descemet’s membrane in 3 (7.1%) cases, ocular hypertension in 9 (21.4%) eyes. All the complications were drug treated within 3-5 days. On the second day mean visual acuity was assessed as 0.56±0.12,1 month after surgery - 0.70±0.16,6 months after surgery - 0.75±0.21, and 1 year after surgery - 0.74±0.19. Corneal induced astigmatism 1 year after the surgery ranged from 0.0 to 1.5 D (mean 0.39±0.16 D). Conclusion. The presented technology of phacoemulsification is relatively safe, effective and provides a possibility to rehabilitate patients with cataract combined with extensive zonular defects of Zinn ligament fibers in minimal terms.

Journalism students in The Netherlands: profile, motivation and role perception The general profile of the Dutch journalism student that emerges from the survey is quite consistent with international research. Using creativity and writing skills in a professional way are stronger motivations than the wish to contribute to democracy. Dutch students consider journalists as impartial providers of news (analysis) and stimulators of public debate. The watchdog role seems to be less popular. Striking is the conclusion that Dutch journalism students are not so much driven by idealistic motives, but merely personal interests. Only MA students who value the watchdog role of the media, stick to their idealistic motive. Feminization of the profession also reflects in training and education. As digital natives, with a strong focus on social media, we expect this new generation of journalists to search and find methods to avoid or fight the negative aspects of social media such as tunnel vision and fake news.

The following thesis is a study of how communities of Washington County, Utah developed within one of the most inhospitable deserts of the American West. A trend of reliance on public works programs during economic depressions, not only put people to work, but also provided an influx of outside aid to develop an infrastructure for future economic stability and growth. Each of these public works was carefully planned by leaders who not only saw the immediate impact these projects would have, but also future benefits they would confer. These communities also became dependent on acquiring outside investment capital from the Mormon Church, private companies and government agencies. This dependency required residents to cooperate not only with each other, but with these outside interests who now had a stake in the county's development. The construction of the Mormon Tabernacle and Temple in St. George during the 1870s made that community an important religious and cultural hub for the entire region. Large-scale irrigation and reclamation projects in the 1890s opened up new areas for agriculture and settlement. And in the 1920s and 1930s the development of Zion National Park and the construction of roads provided the infrastructure for one of the county's most important industries, tourism. Long after these projects' completion they still provided economic and cultural value to the communities they served. Some of these projects provided the infrastructural foundation that allowed Washington County communities to have greater security and control over their economic future. Over time the communities of southern Utah created dramatic reenactments and erected monuments of these very projects to celebrate and preserve the story of their construction. During the first decade of the twenty-first century Washington County has become one of the fastest growing areas in the country, and as a result public works programs continue to be important to support this growth.