Vote of thanks and $100 for repairs of Massachusetts Hall, 15 December 1812

In this letter signed by President John Kirkland, the Corporation voted to honor Loammi Baldwin for his supervision of the repairs to Massachusetts Hall. Repairs included new doors, doorframes, and windows. These updates were likely delayed repairs of damage sustained during the American Revolution when American soldiers were quartered in Massachusetts Hall.

Estimates for repairs to Wigglesworth House, undated

Includes estimates for building stairs on the outside of Wigglesworth House, making shutters, constructing a porch over the well, and making general repairs on the inside of the house.

[Repairs and occasional expenses calculations, 1801]

Slip of paper with calculations for unidentified "repairs" and "occasional expenses" between 1796 and 1801.

Repairs of Houses in Cambridge from June 1797 to 1799, [1799 June 1]

Fragment of one leaf with handwritten accounting figures for the costs of repairs on Cambridge houses to June 1, 1799. The total sum on the document is included as a note at the bottom of the Treasurer's account.

Ship maintenance: foreign commercial shipyard repairs to U.S. government ships.

Mode of access: Internet.

Practical shipbuilding; a treatise on the structural design and building of modern steel vessels; the work of construction, from the making of the raw material to the equipped vessel, including subsquent up-keep and repairs.

I. Text.--II. Diagrams and illustrations.

Organizational, direct support, and general support maintenance repairs parts and special tools list (including depot maintenance repair parts and special tools) : disperser, riot control agent, portable, M3, FSN 1040-711-8296.

"27 April 1972."

Organizational, direct support, and general support maintenance repairs parts and special tools lists (including depot maintenance repair parts and special tools) for receiving set, countermeasures AN/ALQ-133 (NSN 5865-00-134-2601).

"December 1978."

Simple home repairs...inside.

"November 1979"--T.p. verso.

Repairs and utilities; grounds maintenance and land management.

Bibliography: p. 137-139.

Repairs and utilities : refrigeration, air conditioning, mechanical ventilation, and evaporative cooling.

Mode of access: Internet.

Simple home repairs, outside.

Issued Jan. 1978.

Optimal preventive maintenance of leased equipment with corrective minimal repairs

For leased equipment, the lessor carries out the maintenance of the equipment. Usually, the contract of lease specifies the penalty for equipment failures and for repairs not being carried out within specified time limits. This implies that optimal preventive maintenance policies must take these penalty costs into account and properly traded against the cost of preventive maintenance actions. The costs associated with failures are high as unplanned corrective maintenance actions are costly and the resulting penalties due to lease contract terms being violated. The paper develops a model to determine the optimal parameters of a preventive maintenance policy that takes into account all these costs to minimize the total expected cost to the lessor for new item lease. The parameters of the policy are (i) the number of preventive maintenance actions to be carried out over the lease period, (ii) the time instants for such actions, and (iii) the level of action. (c) 2005 Elsevier B.V. All rights reserved.

Influence of EVA and acrylate polymers on some mechanical properties of cementitious repair mortars

In repair works of reinforced concrete, patch repairs tend to crack in the interfacial zone between the mortar and the old concrete. This occurs basically due to the high degree of restriction that acts on a patch repair. For this reason, the technology of patch repair needs to be the subject of a discussion involving professionals who work with projects, construction maintenance and mix proportioning of repair mortars. In the present work, a study is presented on the benefits that the ethylene vinyl acetate copolymer (EVA) and acrylate polymers can provide in the mix proportioning of a repair mortar with respect to compressive, tensile and direct-shear bond strength. The results indicated that the increase in bond strength and the reduction in the influence of the deficiency in Curing conditioning are the main contributions offered by the polymers studied here. (C) 2009 Elsevier, Ltd. All rights reserved.