In this paper,we investigate the problem of describing the form of Jordan triple derivations on trivial extension algebras.We show that every Jordan triple derivation on a 2-torsion free *-type trivial extension algeb...In this paper,we investigate the problem of describing the form of Jordan triple derivations on trivial extension algebras.We show that every Jordan triple derivation on a 2-torsion free *-type trivial extension algebra is a sum of a derivation and an antiderivation.As its applications,Jordan triple derivations on triangular algebras are characterized.展开更多
This applied research seeks to explore feasible plant design for manufacturing insulation materials for construction projects using waste sheep fleece to address environmental issues related to wasted sheep wool and e...This applied research seeks to explore feasible plant design for manufacturing insulation materials for construction projects using waste sheep fleece to address environmental issues related to wasted sheep wool and enhance the gross national product. The process starts by collecting low-cost sheep fleece from farms and processed via a production line, including scouring, plucking, carding, thermal bonding, and packing. The design process involves determining an optimal location, infrastructure, staffing, machinery, environmental impact, and utilities. A final economic analysis is undertaken to estimate the product’s cost, selling price, and break-even point based on the anticipated capital and operational costs. The plant is intended to process 6778 tons of sheep wool annually. The study suggests that Mafraq Industrial City is a perfect location for the plant, and purchasing land and structures is the optimal option. The projected capital cost is 1,416,679 USD, while the anticipated operational costs amount to 3,206,275 USD. Insulation material production is estimated to be 114,756 m3 annually. The material may be manufactured into 1 m wide, 0.05 m thick sheets for 2.02 USD per square meter. Thus, for a 10-year plant, a 2.47 USD/m2 selling price breaks even in one year.展开更多
Let M and N be two factor von Neumann algebras that their dimensions are large than 1,η≠-1 a non zero complex number and Φa(not necessary linear)bijection between two factor von Neumann algebras satisfying Φ(I)=I....Let M and N be two factor von Neumann algebras that their dimensions are large than 1,η≠-1 a non zero complex number and Φa(not necessary linear)bijection between two factor von Neumann algebras satisfying Φ(I)=I.For all A,B∈M,define by A■B=AB+BA the Jordan product of A and B,A·_(η)B=AB+ηBA^(*)the Jordan η-*-product of A and B,respectively.Let Φ and Φ^(-1)preserve the mixed Jordan triple η-*-products.It is proved that Φ is a linear *-isomorphism if η is not real and Φ is the sum of a linear *-isomorphism and a conjugate linear *-isomorphism if η is real.展开更多
BACKGROUND Childhood nephrotic syndrome(NS)outcomes vary widely based on steroid responsiveness and complications.AIM To evaluate steroid response,outcomes,and the use of steroid-sparing medications in children with n...BACKGROUND Childhood nephrotic syndrome(NS)outcomes vary widely based on steroid responsiveness and complications.AIM To evaluate steroid response,outcomes,and the use of steroid-sparing medications in children with nephrotic syndrome in Jordan.METHODS This retrospective study evaluated the demographics and outcomes of 122 children aged 1-18 years with NS between 2011 and 2021 across three centers in Jordan.The outcomes assessed included steroid sensitivity rates,dependence,frequent relapses,complications[chronic kidney disease(CKD),end-stage kidney disease(ESKD)],infections,and need for steroid-sparing treatment.RESULTS Of 64%were boys;median age of disease onset was 4 years.Steroid-sensitive and steroid-resistant NS(SRNS)were observed in 81.1%and 18.9%of patients,respectively;28.7%and 9%had steroid-dependent and frequently relapsing NS,respectively.Kidney biopsies were conducted in 46.7%,the most common finding was minimal change disease in 56.1%;82.6%of biopsied SRNS cases showed focal segmental glomerulosclerosis.The median time to first relapse was 9 months.41.8%of patients required steroidsparing medications,with cyclosporine and mycophenolate mofetil being the most frequently used.Despite these treatments,relapse occurred in 11.5%of cases.Infections,primarily urinary tract infections,affected 24.6%of patients,7.4%progressed to high-grade CKD,and 6.6%required dialysis.SRNS was significantly associated with hematuria,hypertension,and ESKD.CONCLUSION Most patients were steroid sensitive,with minimal change being the most common.Focal segmental glomerulosclerosis was the predominant histopathology in the steroid-resistant cases.SRNS patients had worse outcomes,with more infections,CKD,and ESKD.展开更多
Extreme temperature events have intensified across Jordan over the past 40 a,increasing risks to agriculture,water availability,urban infrastructure,and public health.The purpose of this study is to assess the long-te...Extreme temperature events have intensified across Jordan over the past 40 a,increasing risks to agriculture,water availability,urban infrastructure,and public health.The purpose of this study is to assess the long-term spatial trends and regime shifts in extreme temperature indicators across Jordan's climate zones to explore climate adaptation strategies.This study presents a high-resolution and spatially explicit assessment of thermal extremes using daily data from 1982 to 2024 across 45 grid-based study points in Jordan.Thirteen temperature indices,including percentile-based thresholds,duration metrics,and absolute extremes,were computed using RClimDex and analyzed across four Köppen climate zones:hot desert(BWh),hot semi-arid(BSh),cold desert(BWk),and Mediterranean(Csa)climates.The analysis confirmed a statistically significant warming trend:annual mean maximum temperatures increased by 2.198°C,while annual mean minimum temperatures rose by 2.035°C.Cold extremes have sharply declined,with cold days(TX10p)decreasing by 70.0%–80.0%,and the cold spell duration indicator(CSDI)dropping from 12.6 to 4.0 d/a,particularly in the BWk zone.Heat indices intensified across all zones,with warm days(TX90p)increasing by over 300.0%in BWh,warm nights(TN90p)rising by 38.1%,and the warm spell duration indicator(WSDI)extending fourfold,indicating prolonged exposure to heatwaves.Mean value of maximum temperature(TXx)reached 45.600°C in most arid areas,while minimum temperature(TNx)exceeded 31.600°C,highlighting increased nocturnal heat stress.Change-point analysis indicated that 1998 was a pivotal year,marking a structural transition in both cold and warm temperature indices.Subsequent intensifications after 2010 in TN90p,TNx,and mean of daily maximum temperature(Tmaxmean)reflected an ongoing trend toward sustained thermal extremes.In addition to time-series trends,the study employed network-based correlation analysis to explore the coherence among climate indices.Strong positive correlations were observed among TXx,TX90p,and mean of daily minimum temperature(Tminmean)(r≥0.94),as well as among TN90p,Tminmean,and TNx(r≥0.87),indicating a tightly clustered heat subsystem.Duration metrics like the WSDI showed a close alignment with percentile extremes(between WSDI and TX90p;r=0.88),suggesting integrated heatwave behavior.In contrast,cold indices(TX10p,TN90p,frost days,and CSDI)exhibited weak or negative correlations and displayed peripheral positioning in the climate network,indicating their limited role under a warming regime.Absolute extremes showed weak internal linkages,suggesting episodic rather than systemic response characteristics.This structural realignment indicated a shift from a previously balanced thermal profile to a heat-dominated climate system.Regional variations revealed that BWh and BSh were experiencing the steepest warming,while Csa was transitioning more slowly but was showing signs of reduced winter cooling and increased irrigation demands.The findings establish a robust climate baseline for Jordan and offer actionable insights for climate adaptation planning.Recommended measures include precision irrigation,the development of heat-resilient crops,improvements to urban cooling infrastructure,and early warning systems for thermal extremes.By integrating spatial climate zoning,regime shift analysis,and inter-index correlation structures,this study provides a replicable framework for monitoring climatic transformations and informing resilience strategies in arid and semi-arid areas.展开更多
基金Supported by Basic Research Foundation of Yunnan Education Department(Nos.2020J0748,2021J0635)Talent Project Foundation of Yunnan Provincial Science and Technology Department(No.202105AC160089)NSF of Yunnan Province(No.202101BA070001198).
文摘In this paper,we investigate the problem of describing the form of Jordan triple derivations on trivial extension algebras.We show that every Jordan triple derivation on a 2-torsion free *-type trivial extension algebra is a sum of a derivation and an antiderivation.As its applications,Jordan triple derivations on triangular algebras are characterized.
文摘This applied research seeks to explore feasible plant design for manufacturing insulation materials for construction projects using waste sheep fleece to address environmental issues related to wasted sheep wool and enhance the gross national product. The process starts by collecting low-cost sheep fleece from farms and processed via a production line, including scouring, plucking, carding, thermal bonding, and packing. The design process involves determining an optimal location, infrastructure, staffing, machinery, environmental impact, and utilities. A final economic analysis is undertaken to estimate the product’s cost, selling price, and break-even point based on the anticipated capital and operational costs. The plant is intended to process 6778 tons of sheep wool annually. The study suggests that Mafraq Industrial City is a perfect location for the plant, and purchasing land and structures is the optimal option. The projected capital cost is 1,416,679 USD, while the anticipated operational costs amount to 3,206,275 USD. Insulation material production is estimated to be 114,756 m3 annually. The material may be manufactured into 1 m wide, 0.05 m thick sheets for 2.02 USD per square meter. Thus, for a 10-year plant, a 2.47 USD/m2 selling price breaks even in one year.
文摘Let M and N be two factor von Neumann algebras that their dimensions are large than 1,η≠-1 a non zero complex number and Φa(not necessary linear)bijection between two factor von Neumann algebras satisfying Φ(I)=I.For all A,B∈M,define by A■B=AB+BA the Jordan product of A and B,A·_(η)B=AB+ηBA^(*)the Jordan η-*-product of A and B,respectively.Let Φ and Φ^(-1)preserve the mixed Jordan triple η-*-products.It is proved that Φ is a linear *-isomorphism if η is not real and Φ is the sum of a linear *-isomorphism and a conjugate linear *-isomorphism if η is real.
文摘BACKGROUND Childhood nephrotic syndrome(NS)outcomes vary widely based on steroid responsiveness and complications.AIM To evaluate steroid response,outcomes,and the use of steroid-sparing medications in children with nephrotic syndrome in Jordan.METHODS This retrospective study evaluated the demographics and outcomes of 122 children aged 1-18 years with NS between 2011 and 2021 across three centers in Jordan.The outcomes assessed included steroid sensitivity rates,dependence,frequent relapses,complications[chronic kidney disease(CKD),end-stage kidney disease(ESKD)],infections,and need for steroid-sparing treatment.RESULTS Of 64%were boys;median age of disease onset was 4 years.Steroid-sensitive and steroid-resistant NS(SRNS)were observed in 81.1%and 18.9%of patients,respectively;28.7%and 9%had steroid-dependent and frequently relapsing NS,respectively.Kidney biopsies were conducted in 46.7%,the most common finding was minimal change disease in 56.1%;82.6%of biopsied SRNS cases showed focal segmental glomerulosclerosis.The median time to first relapse was 9 months.41.8%of patients required steroidsparing medications,with cyclosporine and mycophenolate mofetil being the most frequently used.Despite these treatments,relapse occurred in 11.5%of cases.Infections,primarily urinary tract infections,affected 24.6%of patients,7.4%progressed to high-grade CKD,and 6.6%required dialysis.SRNS was significantly associated with hematuria,hypertension,and ESKD.CONCLUSION Most patients were steroid sensitive,with minimal change being the most common.Focal segmental glomerulosclerosis was the predominant histopathology in the steroid-resistant cases.SRNS patients had worse outcomes,with more infections,CKD,and ESKD.
文摘Extreme temperature events have intensified across Jordan over the past 40 a,increasing risks to agriculture,water availability,urban infrastructure,and public health.The purpose of this study is to assess the long-term spatial trends and regime shifts in extreme temperature indicators across Jordan's climate zones to explore climate adaptation strategies.This study presents a high-resolution and spatially explicit assessment of thermal extremes using daily data from 1982 to 2024 across 45 grid-based study points in Jordan.Thirteen temperature indices,including percentile-based thresholds,duration metrics,and absolute extremes,were computed using RClimDex and analyzed across four Köppen climate zones:hot desert(BWh),hot semi-arid(BSh),cold desert(BWk),and Mediterranean(Csa)climates.The analysis confirmed a statistically significant warming trend:annual mean maximum temperatures increased by 2.198°C,while annual mean minimum temperatures rose by 2.035°C.Cold extremes have sharply declined,with cold days(TX10p)decreasing by 70.0%–80.0%,and the cold spell duration indicator(CSDI)dropping from 12.6 to 4.0 d/a,particularly in the BWk zone.Heat indices intensified across all zones,with warm days(TX90p)increasing by over 300.0%in BWh,warm nights(TN90p)rising by 38.1%,and the warm spell duration indicator(WSDI)extending fourfold,indicating prolonged exposure to heatwaves.Mean value of maximum temperature(TXx)reached 45.600°C in most arid areas,while minimum temperature(TNx)exceeded 31.600°C,highlighting increased nocturnal heat stress.Change-point analysis indicated that 1998 was a pivotal year,marking a structural transition in both cold and warm temperature indices.Subsequent intensifications after 2010 in TN90p,TNx,and mean of daily maximum temperature(Tmaxmean)reflected an ongoing trend toward sustained thermal extremes.In addition to time-series trends,the study employed network-based correlation analysis to explore the coherence among climate indices.Strong positive correlations were observed among TXx,TX90p,and mean of daily minimum temperature(Tminmean)(r≥0.94),as well as among TN90p,Tminmean,and TNx(r≥0.87),indicating a tightly clustered heat subsystem.Duration metrics like the WSDI showed a close alignment with percentile extremes(between WSDI and TX90p;r=0.88),suggesting integrated heatwave behavior.In contrast,cold indices(TX10p,TN90p,frost days,and CSDI)exhibited weak or negative correlations and displayed peripheral positioning in the climate network,indicating their limited role under a warming regime.Absolute extremes showed weak internal linkages,suggesting episodic rather than systemic response characteristics.This structural realignment indicated a shift from a previously balanced thermal profile to a heat-dominated climate system.Regional variations revealed that BWh and BSh were experiencing the steepest warming,while Csa was transitioning more slowly but was showing signs of reduced winter cooling and increased irrigation demands.The findings establish a robust climate baseline for Jordan and offer actionable insights for climate adaptation planning.Recommended measures include precision irrigation,the development of heat-resilient crops,improvements to urban cooling infrastructure,and early warning systems for thermal extremes.By integrating spatial climate zoning,regime shift analysis,and inter-index correlation structures,this study provides a replicable framework for monitoring climatic transformations and informing resilience strategies in arid and semi-arid areas.
