The collection of the rough set pairs of an approximation (U, R) can be made into a Stone algebra by defining two binary operators and one unary operator on the pairs. By introducing a more unary operator, one can get a regular double Stone algebra to describe the rough set pairs of an approximation space. Sequent calculi corresponding to the rough alg...

You have accessJournal of UrologyStone Disease: Surgical Therapy I (MP06)1 Sep 2021MP06-12 PRE-OPERATIVE STONE VOLUME MEASUREMENT PROGRAM (QSAS) IS BEST PREDICTOR OF PERCUTANEOUS NEPHROLITHOTOMY (PCNL) OPERATIVE TIME AND FREE RATE Margaret Meagher, Tommy Chiou, Andrea Ferrero, Roger Sur, and Seth Bechis MeagherMargaret Meagher More articles by this author , ChiouTommy Chiou FerreroAndrea Ferrer...

PURPOSE To evaluate factors affecting the success rate of stone fragmentation and stone-free rate after extracorporeal shockwave lithotripsy (SWL) in treatment of upper urinary tract stones. MATERIALS AND METHODS A total of 121 patients with upper urinary tract calculi underwent SWL treatment. RESULTS Success rate of stone fragmentation after SWL was 73.6% (89/121). In 89 patients who had s...

OBJECTIVES To investigate the effect of stone fragmentation on late stone recurrence by comparing the outcome of extracorporeal shockwave lithotripsy (ESWL) and non-fragmenting percutaneous nephrolithotomy (PCNL), and to investigate factors contributing to recurrent calculi. PATIENTS AND METHODS We evaluated stone recurrence in 647 patients who initially achieved a stone-free status after ESW...

With a nite graph G V E we associate a partially ordered set P X P with X V E and x e in P if and only if x is an endpoint of e in G This poset is called the incidence poset of G In this paper we consider the function M p d de ned for p d as the maximum number of edges a graph G can have when it has p vertices and the dimension of its incidence poset is at most d It is easy to see that M p p as...

Through this research, we measure the direct tensile strength of three important southeast Australian heritage dimension stones and compare results with published values. The are Sydney Sandstone, Victorian Bluestone South Black Granite. This information is crucial for stone masons when they selecting cutting construction projects, as need to ensure that use repair will be strong enough withsta...

The modernization of human civilization has led to the prospect better and more durable building materials. Marble, found in various colors textures, been used as a stone for centuries, either cut or polished stone. present study evaluated petrological, geochemical, geotechnical characterizations Gahirat Marble formation It is exposed over an area 160 square kilometers southwestern Chitral. div...

There can be many reasons for engineers to place the footings near a slope such as leakage of suitable sites or architectural considerations. One of the approaches to increase the amount of bearing capacity, especially in soft soils, is adding stone columns to the soil. In this research, the behavior of a strip footing placed near a stone column reinforced clayey slope was investigated. For thi...

OBJECTIVE To assess the prediction of stone clearance and complications of percutaneous nephrolithotomy (PCNL) using the 'STONE' nephrolithometry score, assessing stone size, tract length (skin-to-stone distance), degree of obstruction, number of calyces involved and stone essence (density). PATIENTS AND METHODS This was a prospective study of patients undergoing single-tract PCNL while prone...