Northern catalpa Hackberry species Persimmon American beech White ash Black ash Green ash Blue ash Honey locust Kentucky coffeetree Butternut Black walnut Sweetgum Yellow-poplar Osage-orange Red mulberry Water tupeio American sycamore (Buttonwood) Eastern cottonwood Bigtooth aspen Swamp cottonwood Quaking aspen Black cherry White oak* Swamp white oak* Scarlet oak Southern red oak Cherrybark oak** Overcup oak Bur oak* Swamp chestnut oak* Chinkapin oak* Water oak Pin oak Willow oak Chestnut oak Northern red oak** Shumard oak** Post oak Black oak Black locust Willow species Sassafras Basswood Winged elm American (white) elm Slippery elm Rock elm * Select white oaks. * Select red oaks. Catalpa bignonioides C. speciosa Celtis spp.
research forester, received his bachelor of science degree in forestry at Oregon State College in 1931, and joined the USDA Forest Service in 1934. After working in the southem pine and Douglas-fir regions, he came to the Northeastern Forest Experiment Station in 1945. He has participated in various aspects of the Forest Survey and since 1957 has been a resource analyst in the Experiment Station's Forest Survey unit. CARL E. MAYER is the forest survey project leader at the Northeastern Forest Experiment Station. He received his bachelor's degree in forestry from Iowa State University in 1943. After military service as an officer in the U.S. Marine Corps, he spent 12 years in Forest Survey at the Pacific Northwest Experiment Station in Portland, Oregon. He transferred to the Northeastern Station in 1958 and since that time has directed the Forest Survey of the 14-state Northeastern area.
The IBM System z9e introduces the enhanced book availability (EBA) feature to reduce the number of planned system outages. Included as part of the EBA feature is the concurrent book replacement (CBR) function, which allows a single book in a multibook server to be concurrently removed from the system in order for service personnel to perform a repair or to physically upgrade the hardware on the book. This repaired or upgraded book is then concurrently replaced and reintegrated into the server configuration. In this paper, we describe the benefits that the concurrent book replacement function offers a customer during a planned repair or upgrade of the System z9. We also describe a tool, developed to analyze the server in order to determine whether the server is ''prepared'' for the concurrent book replacement operation, and we provide an overview of the actions performed by this tool. The paper also contains a description of the concurrent book replacement operation, with an emphasis on the unique functions developed as part of this design.
The outstanding reliability, availability, and serviceability (RAS) characteristics of IBM mainframe computers are among the features that gained the IBM eServere family its reputation as a leading platform for business-critical applications. The aim now is to further improve IBM System z9t RAS by introducing redundant I/O interconnect (RII) as a building block of enhanced book availability and recovery scenarios. RII provides a means of maintaining I/O connectivity during planned or unplanned outages in a way that is transparent to the operating system and customer applications. The mechanism that meets this requirement is the provision of an alternate path to the I/O cage, which provides highbandwidth I/O slots to enable a higher number of I/O ports per card. This paper discusses the I/O subsystem hardware and firmware aspects of RII.
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