Recall that the semigroups S and R are said to be strongly Morita equivalent if there exists a unitary Morita context （S,R,<sub>S</sub>P<sub>R</sub>,<sub>R</sub>Q<sub>S</s...Recall that the semigroups S and R are said to be strongly Morita equivalent if there exists a unitary Morita context （S,R,<sub>S</sub>P<sub>R</sub>,<sub>R</sub>Q<sub>S</sub>,） with and surjective.For a factorisable semigroup S,we denote ζ<sub>S</sub>={（s<sub>1</sub>,s<sub>2</sub>）∈S×S|ss<sub>1</sub>=ss<sub>2</sub>,<sub>S</sub>∈S},S′=S/ζ<sub>S</sub> and US-FAct={<sub>S</sub>M∈ S-Act|SM=M and SHom<sub>S</sub>（S,M）≌M}.We show that,for factorisable semigroups S and R,the categories US-FAct and UR-FAct are equivalent if and only if the semigroups S′ and R′ are strongly Morita equivalent.Some conditions for a factorisable semigroup to be strongly Morita equivalent to a sandwich semigroup,local units semigroup,monoid and group separately are also given.Moreover,we show that a seinigroup S is completely simple if and only if S is strongly Morita equivalent to a group and for any index set I,SSHom<sub>S</sub>(S,<sub>i∈I</sub>S)→<sub>i∈I</sub>S,st·f（st）f is an S-isomorphism.展开更多
ASYMMETRIC crying facies （ACF） is characterized by facial asymmetry only when crying. It may present as an exclusive symptom, or be con-comitant with other congenital malformations nd even some fatal birth defects. ...ASYMMETRIC crying facies （ACF） is characterized by facial asymmetry only when crying. It may present as an exclusive symptom, or be con-comitant with other congenital malformations nd even some fatal birth defects. Clinically, ACF is fea-tured by drooping of the intact corner of the mouth during crying, while the face appears symmetric at rest. The facial nerve function is symmetric, as determined by frowning, forehead wrinkling, eye closure, and nasolabial fold depth. When ACF alone is present, the cause is often compression of the mandibular branch of the facial nerve that is prob-ably due to birth trauma or abnormal fetal posture in utero. ACF with other congenital anomalies is usually caused by hypoplasia of the depressor anguli oris muscle （DAOM） on one side of the mouth.展开更多
BACKGROUND Prevotella oris-induced meningitis and Prevotella oris-induced meningitis concomitant with spinal canal infection are extremely rare.To the best of our knowledge,only 1 case of Prevotella oris-induced centr...BACKGROUND Prevotella oris-induced meningitis and Prevotella oris-induced meningitis concomitant with spinal canal infection are extremely rare.To the best of our knowledge,only 1 case of Prevotella oris-induced central system infection has been reported.This is the second report on meningitis combined with spinal canal infection due to Prevotella oris.CASE SUMMARY We report a case of a 9-year-old boy suffering from meningitis and spinal canal infection.The patient presented to the neurosurgery department with lumbosacral pain for 1 mo and headache and vomiting for 1 d.He had been treated with cephalosporin and nonsteroidal anti-inflammatory drugs for fever,otalgia and pharyngalgia in a local hospital 2 mo prior to this admission.During hospitalization,magnetic resonance imaging suggested meningitis and L3-S1 lumbosacral dural sac infection.The cerebrospinal fluid and blood cultures were negative,but the cerebrospinal fluid specimen indicated the presence of Prevotella oris by metagenomic next-generation sequencing.Previous cases of Prevotella oris infection were retrieved from PubMed to characterize the clinicopathological features and identify the prognostic factors and related antimicrobial treatment of infection due to Prevotella oris.CONCLUSION This report shed light on the characteristics of Prevotella oris infection and highlighted the role of metagenomic next-generation sequencing in pathogen detection.展开更多
Background: Historically frenotomy was performed at newborn babies’ baptism for healthy breast-feeding over many centuries. Although it was necessary for nursing babies, its application was denied subjectively withou...Background: Historically frenotomy was performed at newborn babies’ baptism for healthy breast-feeding over many centuries. Although it was necessary for nursing babies, its application was denied subjectively without clinical observation since the early 20th century. As a result solutions for breastfeeding and breast problems are confused now. Methods: We studied changes in breastfeeding and mothers’ breasts before and one month after the surgeries for ADEL by standards for healthy breastfeeding and breasts. Results: With regard to suckling, before the surgeries 24% of babies opened their eyes during breastfeeding, while after surgeries 76% opened eyes while nursing. 30% of the babies latched onto the mother’s breast with a wide-open mouth. After surgeries, 84% properly latched on. 73% of the babies had calluses on the upper lip before surgeries, and no calluses were observed after surgeries. 27% of babies before surgeries moved the jaws during breast-feeding, but after surgeries 88% moved the jaws while nursing. White debris was on the dorsum tongue in 70% of babies prior to surgeries. After surgeries, 22% were with debris. 67% of mothers experienced nipple pain before their babies’ surgeries while 6% had pain after the surgeries. Flattened nipples were observed in 55% of mothers before the infants’ surgeries, 7% after surgeries. 23% of mothers had breast pain before the surgeries, and 4% had breast pain after the surgeries. Mastitis was also reduced from 9% to 1% after surgeries. 73% of women had palpable breast masses, and after the surgeries 25% had palpable masses. Summary: Remarkable improvements in breastfeeding and in women’s breasts were achieved after their infants underwent operations for ADEL. These results indicate the necessity of surgical interventions in babies with ADEL for healthy breastfeeding and breasts (279).展开更多
Asymmetric facial appearance may originate from abnormalities of facial musculature or facial innervation. Congenital absence or hypoplasia of facial muscles has not been known except for the depressor anguli oris mus...Asymmetric facial appearance may originate from abnormalities of facial musculature or facial innervation. Congenital absence or hypoplasia of facial muscles has not been known except for the depressor anguli oris muscle. Even, congenital unilateral hypoplasia of the orbicularis oris muscle cause of unilateral upper lip palsy has not been reported in the literature up to day. In this report, we present a patient with congenital unilateral upper lip palsy although the facial nerve was normal.展开更多
Objective To investigate the functional repair of secondary deformity of unilateral cleft lip. Methods The nasal branch,nasolabial branch,and labial branch of orbicularis oris muscle were dissected and repositioned pr...Objective To investigate the functional repair of secondary deformity of unilateral cleft lip. Methods The nasal branch,nasolabial branch,and labial branch of orbicularis oris muscle were dissected and repositioned precisely to correct the secondary deformity of unilateral cleft lip. Results 96 parients were treated展开更多
This paper explores the ergodic channel capacity of multiple-input single-output(MISO)free-space optical(FSO)communication systems,assisted by(optical)re-configurable intelligent surfaces[(O)RIS],made of concave refle...This paper explores the ergodic channel capacity of multiple-input single-output(MISO)free-space optical(FSO)communication systems,assisted by(optical)re-configurable intelligent surfaces[(O)RIS],made of concave reflectors.On the one hand,RIS technology mitigates dead zones in communication systems.Additionally,it increases the data rate and communication range,enhances the communication channel by making it intelligent,and improves the system’s capacity.Finally,the RIS technology improves the spectrum and energy efficiencies of the considered systems.On the other hand,transmitting diversity mitigates deep fade and helps to achieve beamforming to regulate the beam sent in a specific direction.Finally,multiple light sources help to send different versions of the same information at other time slots.Furthermore,compared to flat reflectors,concave mirrors provide economic advantages enabled by their natural shape,which helps converge the impinging light beams into the same focal point.In this paper,we harness the full potential of ORIS and MISO technologies in an FSO system by exploiting the hollow of concave reflectors to focus the reflected beams on a single user.We derive an approximated closed-form expression,provide results of the proposed ORIS-aided FSO systems’ergodic channel capacity,and discuss the suitable type of concave reflector.These results show that all types of concave mirrors provide similar results except when the thickness of the reflector is large enough to impact the reflected light.展开更多
基金The research is partially supported by a UGC(HK) grant ≠2160092Project is supported by the National Natural Science Foundation of China
文摘Recall that the semigroups S and R are said to be strongly Morita equivalent if there exists a unitary Morita context （S,R,<sub>S</sub>P<sub>R</sub>,<sub>R</sub>Q<sub>S</sub>,） with and surjective.For a factorisable semigroup S,we denote ζ<sub>S</sub>={（s<sub>1</sub>,s<sub>2</sub>）∈S×S|ss<sub>1</sub>=ss<sub>2</sub>,<sub>S</sub>∈S},S′=S/ζ<sub>S</sub> and US-FAct={<sub>S</sub>M∈ S-Act|SM=M and SHom<sub>S</sub>（S,M）≌M}.We show that,for factorisable semigroups S and R,the categories US-FAct and UR-FAct are equivalent if and only if the semigroups S′ and R′ are strongly Morita equivalent.Some conditions for a factorisable semigroup to be strongly Morita equivalent to a sandwich semigroup,local units semigroup,monoid and group separately are also given.Moreover,we show that a seinigroup S is completely simple if and only if S is strongly Morita equivalent to a group and for any index set I,SSHom<sub>S</sub>(S,<sub>i∈I</sub>S)→<sub>i∈I</sub>S,st·f（st）f is an S-isomorphism.
文摘ASYMMETRIC crying facies （ACF） is characterized by facial asymmetry only when crying. It may present as an exclusive symptom, or be con-comitant with other congenital malformations nd even some fatal birth defects. Clinically, ACF is fea-tured by drooping of the intact corner of the mouth during crying, while the face appears symmetric at rest. The facial nerve function is symmetric, as determined by frowning, forehead wrinkling, eye closure, and nasolabial fold depth. When ACF alone is present, the cause is often compression of the mandibular branch of the facial nerve that is prob-ably due to birth trauma or abnormal fetal posture in utero. ACF with other congenital anomalies is usually caused by hypoplasia of the depressor anguli oris muscle （DAOM） on one side of the mouth.
文摘BACKGROUND Prevotella oris-induced meningitis and Prevotella oris-induced meningitis concomitant with spinal canal infection are extremely rare.To the best of our knowledge,only 1 case of Prevotella oris-induced central system infection has been reported.This is the second report on meningitis combined with spinal canal infection due to Prevotella oris.CASE SUMMARY We report a case of a 9-year-old boy suffering from meningitis and spinal canal infection.The patient presented to the neurosurgery department with lumbosacral pain for 1 mo and headache and vomiting for 1 d.He had been treated with cephalosporin and nonsteroidal anti-inflammatory drugs for fever,otalgia and pharyngalgia in a local hospital 2 mo prior to this admission.During hospitalization,magnetic resonance imaging suggested meningitis and L3-S1 lumbosacral dural sac infection.The cerebrospinal fluid and blood cultures were negative,but the cerebrospinal fluid specimen indicated the presence of Prevotella oris by metagenomic next-generation sequencing.Previous cases of Prevotella oris infection were retrieved from PubMed to characterize the clinicopathological features and identify the prognostic factors and related antimicrobial treatment of infection due to Prevotella oris.CONCLUSION This report shed light on the characteristics of Prevotella oris infection and highlighted the role of metagenomic next-generation sequencing in pathogen detection.
文摘Background: Historically frenotomy was performed at newborn babies’ baptism for healthy breast-feeding over many centuries. Although it was necessary for nursing babies, its application was denied subjectively without clinical observation since the early 20th century. As a result solutions for breastfeeding and breast problems are confused now. Methods: We studied changes in breastfeeding and mothers’ breasts before and one month after the surgeries for ADEL by standards for healthy breastfeeding and breasts. Results: With regard to suckling, before the surgeries 24% of babies opened their eyes during breastfeeding, while after surgeries 76% opened eyes while nursing. 30% of the babies latched onto the mother’s breast with a wide-open mouth. After surgeries, 84% properly latched on. 73% of the babies had calluses on the upper lip before surgeries, and no calluses were observed after surgeries. 27% of babies before surgeries moved the jaws during breast-feeding, but after surgeries 88% moved the jaws while nursing. White debris was on the dorsum tongue in 70% of babies prior to surgeries. After surgeries, 22% were with debris. 67% of mothers experienced nipple pain before their babies’ surgeries while 6% had pain after the surgeries. Flattened nipples were observed in 55% of mothers before the infants’ surgeries, 7% after surgeries. 23% of mothers had breast pain before the surgeries, and 4% had breast pain after the surgeries. Mastitis was also reduced from 9% to 1% after surgeries. 73% of women had palpable breast masses, and after the surgeries 25% had palpable masses. Summary: Remarkable improvements in breastfeeding and in women’s breasts were achieved after their infants underwent operations for ADEL. These results indicate the necessity of surgical interventions in babies with ADEL for healthy breastfeeding and breasts (279).
文摘Asymmetric facial appearance may originate from abnormalities of facial musculature or facial innervation. Congenital absence or hypoplasia of facial muscles has not been known except for the depressor anguli oris muscle. Even, congenital unilateral hypoplasia of the orbicularis oris muscle cause of unilateral upper lip palsy has not been reported in the literature up to day. In this report, we present a patient with congenital unilateral upper lip palsy although the facial nerve was normal.
文摘Objective To investigate the functional repair of secondary deformity of unilateral cleft lip. Methods The nasal branch,nasolabial branch,and labial branch of orbicularis oris muscle were dissected and repositioned precisely to correct the secondary deformity of unilateral cleft lip. Results 96 parients were treated
文摘This paper explores the ergodic channel capacity of multiple-input single-output(MISO)free-space optical(FSO)communication systems,assisted by(optical)re-configurable intelligent surfaces[(O)RIS],made of concave reflectors.On the one hand,RIS technology mitigates dead zones in communication systems.Additionally,it increases the data rate and communication range,enhances the communication channel by making it intelligent,and improves the system’s capacity.Finally,the RIS technology improves the spectrum and energy efficiencies of the considered systems.On the other hand,transmitting diversity mitigates deep fade and helps to achieve beamforming to regulate the beam sent in a specific direction.Finally,multiple light sources help to send different versions of the same information at other time slots.Furthermore,compared to flat reflectors,concave mirrors provide economic advantages enabled by their natural shape,which helps converge the impinging light beams into the same focal point.In this paper,we harness the full potential of ORIS and MISO technologies in an FSO system by exploiting the hollow of concave reflectors to focus the reflected beams on a single user.We derive an approximated closed-form expression,provide results of the proposed ORIS-aided FSO systems’ergodic channel capacity,and discuss the suitable type of concave reflector.These results show that all types of concave mirrors provide similar results except when the thickness of the reflector is large enough to impact the reflected light.
